aframe.js - main - infofintech/system

aframe.js
75 197 строк2 MB
Vadim Ponomarev
New version v6.3.7.1
10 июл 2026, 18:35
10 июл 2026, 18:35326fd11
(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.AFRAME = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(_dereq_,module,exports){
var str = Object.prototype.toString

module.exports = anArray

function anArray(arr) {
  return (
       arr.BYTES_PER_ELEMENT
    && str.call(arr.buffer) === '[object ArrayBuffer]'
    || Array.isArray(arr)
  )
}

},{}],2:[function(_dereq_,module,exports){
module.exports = function numtype(num, def) {
	return typeof num === 'number'
		? num 
		: (typeof def === 'number' ? def : 0)
}
},{}],3:[function(_dereq_,module,exports){
'use strict'

exports.byteLength = byteLength
exports.toByteArray = toByteArray
exports.fromByteArray = fromByteArray

var lookup = []
var revLookup = []
var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array

var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
for (var i = 0, len = code.length; i < len; ++i) {
  lookup[i] = code[i]
  revLookup[code.charCodeAt(i)] = i
}

// Support decoding URL-safe base64 strings, as Node.js does.
// See: https://en.wikipedia.org/wiki/Base64#URL_applications
revLookup['-'.charCodeAt(0)] = 62
revLookup['_'.charCodeAt(0)] = 63

function getLens (b64) {
  var len = b64.length

  if (len % 4 > 0) {
    throw new Error('Invalid string. Length must be a multiple of 4')
  }

  // Trim off extra bytes after placeholder bytes are found
  // See: https://github.com/beatgammit/base64-js/issues/42
  var validLen = b64.indexOf('=')
  if (validLen === -1) validLen = len

  var placeHoldersLen = validLen === len
    ? 0
    : 4 - (validLen % 4)

  return [validLen, placeHoldersLen]
}

// base64 is 4/3 + up to two characters of the original data
function byteLength (b64) {
  var lens = getLens(b64)
  var validLen = lens[0]
  var placeHoldersLen = lens[1]
  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
}

function _byteLength (b64, validLen, placeHoldersLen) {
  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
}

function toByteArray (b64) {
  var tmp
  var lens = getLens(b64)
  var validLen = lens[0]
  var placeHoldersLen = lens[1]

  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))

  var curByte = 0

  // if there are placeholders, only get up to the last complete 4 chars
  var len = placeHoldersLen > 0
    ? validLen - 4
    : validLen

  for (var i = 0; i < len; i += 4) {
    tmp =
      (revLookup[b64.charCodeAt(i)] << 18) |
      (revLookup[b64.charCodeAt(i + 1)] << 12) |
      (revLookup[b64.charCodeAt(i + 2)] << 6) |
      revLookup[b64.charCodeAt(i + 3)]
    arr[curByte++] = (tmp >> 16) & 0xFF
    arr[curByte++] = (tmp >> 8) & 0xFF
    arr[curByte++] = tmp & 0xFF
  }

  if (placeHoldersLen === 2) {
    tmp =
      (revLookup[b64.charCodeAt(i)] << 2) |
      (revLookup[b64.charCodeAt(i + 1)] >> 4)
    arr[curByte++] = tmp & 0xFF
  }

  if (placeHoldersLen === 1) {
    tmp =
      (revLookup[b64.charCodeAt(i)] << 10) |
      (revLookup[b64.charCodeAt(i + 1)] << 4) |
      (revLookup[b64.charCodeAt(i + 2)] >> 2)
    arr[curByte++] = (tmp >> 8) & 0xFF
    arr[curByte++] = tmp & 0xFF
  }

  return arr
}

function tripletToBase64 (num) {
  return lookup[num >> 18 & 0x3F] +
    lookup[num >> 12 & 0x3F] +
    lookup[num >> 6 & 0x3F] +
    lookup[num & 0x3F]
}

function encodeChunk (uint8, start, end) {
  var tmp
  var output = []
  for (var i = start; i < end; i += 3) {
    tmp =
      ((uint8[i] << 16) & 0xFF0000) +
      ((uint8[i + 1] << 8) & 0xFF00) +
      (uint8[i + 2] & 0xFF)
    output.push(tripletToBase64(tmp))
  }
  return output.join('')
}

function fromByteArray (uint8) {
  var tmp
  var len = uint8.length
  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
  var parts = []
  var maxChunkLength = 16383 // must be multiple of 3

  // go through the array every three bytes, we'll deal with trailing stuff later
  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
    parts.push(encodeChunk(
      uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)
    ))
  }

  // pad the end with zeros, but make sure to not forget the extra bytes
  if (extraBytes === 1) {
    tmp = uint8[len - 1]
    parts.push(
      lookup[tmp >> 2] +
      lookup[(tmp << 4) & 0x3F] +
      '=='
    )
  } else if (extraBytes === 2) {
    tmp = (uint8[len - 2] << 8) + uint8[len - 1]
    parts.push(
      lookup[tmp >> 10] +
      lookup[(tmp >> 4) & 0x3F] +
      lookup[(tmp << 2) & 0x3F] +
      '='
    )
  }

  return parts.join('')
}

},{}],4:[function(_dereq_,module,exports){
'use strict';
// For more information about browser field, check out the browser field at https://github.com/substack/browserify-handbook#browser-field.

module.exports = {
    // Create a <link> tag with optional data attributes
    createLink: function(href, attributes) {
        var head = document.head || document.getElementsByTagName('head')[0];
        var link = document.createElement('link');

        link.href = href;
        link.rel = 'stylesheet';

        for (var key in attributes) {
            if ( ! attributes.hasOwnProperty(key)) {
                continue;
            }
            var value = attributes[key];
            link.setAttribute('data-' + key, value);
        }

        head.appendChild(link);
    },
    // Create a <style> tag with optional data attributes
    createStyle: function(cssText, attributes) {
        var head = document.head || document.getElementsByTagName('head')[0],
            style = document.createElement('style');

        style.type = 'text/css';

        for (var key in attributes) {
            if ( ! attributes.hasOwnProperty(key)) {
                continue;
            }
            var value = attributes[key];
            style.setAttribute('data-' + key, value);
        }
        
        if (style.sheet) { // for jsdom and IE9+
            style.innerHTML = cssText;
            style.sheet.cssText = cssText;
            head.appendChild(style);
        } else if (style.styleSheet) { // for IE8 and below
            head.appendChild(style);
            style.styleSheet.cssText = cssText;
        } else { // for Chrome, Firefox, and Safari
            style.appendChild(document.createTextNode(cssText));
            head.appendChild(style);
        }
    }
};

},{}],5:[function(_dereq_,module,exports){
// shim for using process in browser
var process = module.exports = {};

// cached from whatever global is present so that test runners that stub it
// don't break things.  But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals.  It's inside a
// function because try/catches deoptimize in certain engines.

var cachedSetTimeout;
var cachedClearTimeout;

function defaultSetTimout() {
    throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
    throw new Error('clearTimeout has not been defined');
}
(function () {
    try {
        if (typeof setTimeout === 'function') {
            cachedSetTimeout = setTimeout;
        } else {
            cachedSetTimeout = defaultSetTimout;
        }
    } catch (e) {
        cachedSetTimeout = defaultSetTimout;
    }
    try {
        if (typeof clearTimeout === 'function') {
            cachedClearTimeout = clearTimeout;
        } else {
            cachedClearTimeout = defaultClearTimeout;
        }
    } catch (e) {
        cachedClearTimeout = defaultClearTimeout;
    }
} ())
function runTimeout(fun) {
    if (cachedSetTimeout === setTimeout) {
        //normal enviroments in sane situations
        return setTimeout(fun, 0);
    }
    // if setTimeout wasn't available but was latter defined
    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
        cachedSetTimeout = setTimeout;
        return setTimeout(fun, 0);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedSetTimeout(fun, 0);
    } catch(e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
            return cachedSetTimeout.call(null, fun, 0);
        } catch(e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
            return cachedSetTimeout.call(this, fun, 0);
        }
    }


}
function runClearTimeout(marker) {
    if (cachedClearTimeout === clearTimeout) {
        //normal enviroments in sane situations
        return clearTimeout(marker);
    }
    // if clearTimeout wasn't available but was latter defined
    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
        cachedClearTimeout = clearTimeout;
        return clearTimeout(marker);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedClearTimeout(marker);
    } catch (e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
            return cachedClearTimeout.call(null, marker);
        } catch (e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
            return cachedClearTimeout.call(this, marker);
        }
    }



}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;

function cleanUpNextTick() {
    if (!draining || !currentQueue) {
        return;
    }
    draining = false;
    if (currentQueue.length) {
        queue = currentQueue.concat(queue);
    } else {
        queueIndex = -1;
    }
    if (queue.length) {
        drainQueue();
    }
}

function drainQueue() {
    if (draining) {
        return;
    }
    var timeout = runTimeout(cleanUpNextTick);
    draining = true;

    var len = queue.length;
    while(len) {
        currentQueue = queue;
        queue = [];
        while (++queueIndex < len) {
            if (currentQueue) {
                currentQueue[queueIndex].run();
            }
        }
        queueIndex = -1;
        len = queue.length;
    }
    currentQueue = null;
    draining = false;
    runClearTimeout(timeout);
}

process.nextTick = function (fun) {
    var args = new Array(arguments.length - 1);
    if (arguments.length > 1) {
        for (var i = 1; i < arguments.length; i++) {
            args[i - 1] = arguments[i];
        }
    }
    queue.push(new Item(fun, args));
    if (queue.length === 1 && !draining) {
        runTimeout(drainQueue);
    }
};

// v8 likes predictible objects
function Item(fun, array) {
    this.fun = fun;
    this.array = array;
}
Item.prototype.run = function () {
    this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};

function noop() {}

process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;
process.prependListener = noop;
process.prependOnceListener = noop;

process.listeners = function (name) { return [] }

process.binding = function (name) {
    throw new Error('process.binding is not supported');
};

process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };

},{}],6:[function(_dereq_,module,exports){
var Buffer = _dereq_('buffer').Buffer; // for use with browserify

module.exports = function (a, b) {
    if (!Buffer.isBuffer(a)) return undefined;
    if (!Buffer.isBuffer(b)) return undefined;
    if (typeof a.equals === 'function') return a.equals(b);
    if (a.length !== b.length) return false;
    
    for (var i = 0; i < a.length; i++) {
        if (a[i] !== b[i]) return false;
    }
    
    return true;
};

},{"buffer":7}],7:[function(_dereq_,module,exports){
(function (global){
/*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
 * @license  MIT
 */
/* eslint-disable no-proto */

'use strict'

var base64 = _dereq_('base64-js')
var ieee754 = _dereq_('ieee754')
var isArray = _dereq_('isarray')

exports.Buffer = Buffer
exports.SlowBuffer = SlowBuffer
exports.INSPECT_MAX_BYTES = 50

/**
 * If `Buffer.TYPED_ARRAY_SUPPORT`:
 *   === true    Use Uint8Array implementation (fastest)
 *   === false   Use Object implementation (most compatible, even IE6)
 *
 * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
 * Opera 11.6+, iOS 4.2+.
 *
 * Due to various browser bugs, sometimes the Object implementation will be used even
 * when the browser supports typed arrays.
 *
 * Note:
 *
 *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
 *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
 *
 *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
 *
 *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
 *     incorrect length in some situations.

 * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
 * get the Object implementation, which is slower but behaves correctly.
 */
Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
  ? global.TYPED_ARRAY_SUPPORT
  : typedArraySupport()

/*
 * Export kMaxLength after typed array support is determined.
 */
exports.kMaxLength = kMaxLength()

function typedArraySupport () {
  try {
    var arr = new Uint8Array(1)
    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}
    return arr.foo() === 42 && // typed array instances can be augmented
        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
  } catch (e) {
    return false
  }
}

function kMaxLength () {
  return Buffer.TYPED_ARRAY_SUPPORT
    ? 0x7fffffff
    : 0x3fffffff
}

function createBuffer (that, length) {
  if (kMaxLength() < length) {
    throw new RangeError('Invalid typed array length')
  }
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    // Return an augmented `Uint8Array` instance, for best performance
    that = new Uint8Array(length)
    that.__proto__ = Buffer.prototype
  } else {
    // Fallback: Return an object instance of the Buffer class
    if (that === null) {
      that = new Buffer(length)
    }
    that.length = length
  }

  return that
}

/**
 * The Buffer constructor returns instances of `Uint8Array` that have their
 * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
 * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
 * and the `Uint8Array` methods. Square bracket notation works as expected -- it
 * returns a single octet.
 *
 * The `Uint8Array` prototype remains unmodified.
 */

function Buffer (arg, encodingOrOffset, length) {
  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {
    return new Buffer(arg, encodingOrOffset, length)
  }

  // Common case.
  if (typeof arg === 'number') {
    if (typeof encodingOrOffset === 'string') {
      throw new Error(
        'If encoding is specified then the first argument must be a string'
      )
    }
    return allocUnsafe(this, arg)
  }
  return from(this, arg, encodingOrOffset, length)
}

Buffer.poolSize = 8192 // not used by this implementation

// TODO: Legacy, not needed anymore. Remove in next major version.
Buffer._augment = function (arr) {
  arr.__proto__ = Buffer.prototype
  return arr
}

function from (that, value, encodingOrOffset, length) {
  if (typeof value === 'number') {
    throw new TypeError('"value" argument must not be a number')
  }

  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {
    return fromArrayBuffer(that, value, encodingOrOffset, length)
  }

  if (typeof value === 'string') {
    return fromString(that, value, encodingOrOffset)
  }

  return fromObject(that, value)
}

/**
 * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
 * if value is a number.
 * Buffer.from(str[, encoding])
 * Buffer.from(array)
 * Buffer.from(buffer)
 * Buffer.from(arrayBuffer[, byteOffset[, length]])
 **/
Buffer.from = function (value, encodingOrOffset, length) {
  return from(null, value, encodingOrOffset, length)
}

if (Buffer.TYPED_ARRAY_SUPPORT) {
  Buffer.prototype.__proto__ = Uint8Array.prototype
  Buffer.__proto__ = Uint8Array
  if (typeof Symbol !== 'undefined' && Symbol.species &&
      Buffer[Symbol.species] === Buffer) {
    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
    Object.defineProperty(Buffer, Symbol.species, {
      value: null,
      configurable: true
    })
  }
}

function assertSize (size) {
  if (typeof size !== 'number') {
    throw new TypeError('"size" argument must be a number')
  } else if (size < 0) {
    throw new RangeError('"size" argument must not be negative')
  }
}

function alloc (that, size, fill, encoding) {
  assertSize(size)
  if (size <= 0) {
    return createBuffer(that, size)
  }
  if (fill !== undefined) {
    // Only pay attention to encoding if it's a string. This
    // prevents accidentally sending in a number that would
    // be interpretted as a start offset.
    return typeof encoding === 'string'
      ? createBuffer(that, size).fill(fill, encoding)
      : createBuffer(that, size).fill(fill)
  }
  return createBuffer(that, size)
}

/**
 * Creates a new filled Buffer instance.
 * alloc(size[, fill[, encoding]])
 **/
Buffer.alloc = function (size, fill, encoding) {
  return alloc(null, size, fill, encoding)
}

function allocUnsafe (that, size) {
  assertSize(size)
  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)
  if (!Buffer.TYPED_ARRAY_SUPPORT) {
    for (var i = 0; i < size; ++i) {
      that[i] = 0
    }
  }
  return that
}

/**
 * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
 * */
Buffer.allocUnsafe = function (size) {
  return allocUnsafe(null, size)
}
/**
 * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
 */
Buffer.allocUnsafeSlow = function (size) {
  return allocUnsafe(null, size)
}

function fromString (that, string, encoding) {
  if (typeof encoding !== 'string' || encoding === '') {
    encoding = 'utf8'
  }

  if (!Buffer.isEncoding(encoding)) {
    throw new TypeError('"encoding" must be a valid string encoding')
  }

  var length = byteLength(string, encoding) | 0
  that = createBuffer(that, length)

  var actual = that.write(string, encoding)

  if (actual !== length) {
    // Writing a hex string, for example, that contains invalid characters will
    // cause everything after the first invalid character to be ignored. (e.g.
    // 'abxxcd' will be treated as 'ab')
    that = that.slice(0, actual)
  }

  return that
}

function fromArrayLike (that, array) {
  var length = array.length < 0 ? 0 : checked(array.length) | 0
  that = createBuffer(that, length)
  for (var i = 0; i < length; i += 1) {
    that[i] = array[i] & 255
  }
  return that
}

function fromArrayBuffer (that, array, byteOffset, length) {
  array.byteLength // this throws if `array` is not a valid ArrayBuffer

  if (byteOffset < 0 || array.byteLength < byteOffset) {
    throw new RangeError('\'offset\' is out of bounds')
  }

  if (array.byteLength < byteOffset + (length || 0)) {
    throw new RangeError('\'length\' is out of bounds')
  }

  if (byteOffset === undefined && length === undefined) {
    array = new Uint8Array(array)
  } else if (length === undefined) {
    array = new Uint8Array(array, byteOffset)
  } else {
    array = new Uint8Array(array, byteOffset, length)
  }

  if (Buffer.TYPED_ARRAY_SUPPORT) {
    // Return an augmented `Uint8Array` instance, for best performance
    that = array
    that.__proto__ = Buffer.prototype
  } else {
    // Fallback: Return an object instance of the Buffer class
    that = fromArrayLike(that, array)
  }
  return that
}

function fromObject (that, obj) {
  if (Buffer.isBuffer(obj)) {
    var len = checked(obj.length) | 0
    that = createBuffer(that, len)

    if (that.length === 0) {
      return that
    }

    obj.copy(that, 0, 0, len)
    return that
  }

  if (obj) {
    if ((typeof ArrayBuffer !== 'undefined' &&
        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {
      if (typeof obj.length !== 'number' || isnan(obj.length)) {
        return createBuffer(that, 0)
      }
      return fromArrayLike(that, obj)
    }

    if (obj.type === 'Buffer' && isArray(obj.data)) {
      return fromArrayLike(that, obj.data)
    }
  }

  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
}

function checked (length) {
  // Note: cannot use `length < kMaxLength()` here because that fails when
  // length is NaN (which is otherwise coerced to zero.)
  if (length >= kMaxLength()) {
    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
  }
  return length | 0
}

function SlowBuffer (length) {
  if (+length != length) { // eslint-disable-line eqeqeq
    length = 0
  }
  return Buffer.alloc(+length)
}

Buffer.isBuffer = function isBuffer (b) {
  return !!(b != null && b._isBuffer)
}

Buffer.compare = function compare (a, b) {
  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
    throw new TypeError('Arguments must be Buffers')
  }

  if (a === b) return 0

  var x = a.length
  var y = b.length

  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
    if (a[i] !== b[i]) {
      x = a[i]
      y = b[i]
      break
    }
  }

  if (x < y) return -1
  if (y < x) return 1
  return 0
}

Buffer.isEncoding = function isEncoding (encoding) {
  switch (String(encoding).toLowerCase()) {
    case 'hex':
    case 'utf8':
    case 'utf-8':
    case 'ascii':
    case 'latin1':
    case 'binary':
    case 'base64':
    case 'ucs2':
    case 'ucs-2':
    case 'utf16le':
    case 'utf-16le':
      return true
    default:
      return false
  }
}

Buffer.concat = function concat (list, length) {
  if (!isArray(list)) {
    throw new TypeError('"list" argument must be an Array of Buffers')
  }

  if (list.length === 0) {
    return Buffer.alloc(0)
  }

  var i
  if (length === undefined) {
    length = 0
    for (i = 0; i < list.length; ++i) {
      length += list[i].length
    }
  }

  var buffer = Buffer.allocUnsafe(length)
  var pos = 0
  for (i = 0; i < list.length; ++i) {
    var buf = list[i]
    if (!Buffer.isBuffer(buf)) {
      throw new TypeError('"list" argument must be an Array of Buffers')
    }
    buf.copy(buffer, pos)
    pos += buf.length
  }
  return buffer
}

function byteLength (string, encoding) {
  if (Buffer.isBuffer(string)) {
    return string.length
  }
  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&
      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {
    return string.byteLength
  }
  if (typeof string !== 'string') {
    string = '' + string
  }

  var len = string.length
  if (len === 0) return 0

  // Use a for loop to avoid recursion
  var loweredCase = false
  for (;;) {
    switch (encoding) {
      case 'ascii':
      case 'latin1':
      case 'binary':
        return len
      case 'utf8':
      case 'utf-8':
      case undefined:
        return utf8ToBytes(string).length
      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return len * 2
      case 'hex':
        return len >>> 1
      case 'base64':
        return base64ToBytes(string).length
      default:
        if (loweredCase) return utf8ToBytes(string).length // assume utf8
        encoding = ('' + encoding).toLowerCase()
        loweredCase = true
    }
  }
}
Buffer.byteLength = byteLength

function slowToString (encoding, start, end) {
  var loweredCase = false

  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
  // property of a typed array.

  // This behaves neither like String nor Uint8Array in that we set start/end
  // to their upper/lower bounds if the value passed is out of range.
  // undefined is handled specially as per ECMA-262 6th Edition,
  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
  if (start === undefined || start < 0) {
    start = 0
  }
  // Return early if start > this.length. Done here to prevent potential uint32
  // coercion fail below.
  if (start > this.length) {
    return ''
  }

  if (end === undefined || end > this.length) {
    end = this.length
  }

  if (end <= 0) {
    return ''
  }

  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
  end >>>= 0
  start >>>= 0

  if (end <= start) {
    return ''
  }

  if (!encoding) encoding = 'utf8'

  while (true) {
    switch (encoding) {
      case 'hex':
        return hexSlice(this, start, end)

      case 'utf8':
      case 'utf-8':
        return utf8Slice(this, start, end)

      case 'ascii':
        return asciiSlice(this, start, end)

      case 'latin1':
      case 'binary':
        return latin1Slice(this, start, end)

      case 'base64':
        return base64Slice(this, start, end)

      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return utf16leSlice(this, start, end)

      default:
        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
        encoding = (encoding + '').toLowerCase()
        loweredCase = true
    }
  }
}

// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect
// Buffer instances.
Buffer.prototype._isBuffer = true

function swap (b, n, m) {
  var i = b[n]
  b[n] = b[m]
  b[m] = i
}

Buffer.prototype.swap16 = function swap16 () {
  var len = this.length
  if (len % 2 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 16-bits')
  }
  for (var i = 0; i < len; i += 2) {
    swap(this, i, i + 1)
  }
  return this
}

Buffer.prototype.swap32 = function swap32 () {
  var len = this.length
  if (len % 4 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 32-bits')
  }
  for (var i = 0; i < len; i += 4) {
    swap(this, i, i + 3)
    swap(this, i + 1, i + 2)
  }
  return this
}

Buffer.prototype.swap64 = function swap64 () {
  var len = this.length
  if (len % 8 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 64-bits')
  }
  for (var i = 0; i < len; i += 8) {
    swap(this, i, i + 7)
    swap(this, i + 1, i + 6)
    swap(this, i + 2, i + 5)
    swap(this, i + 3, i + 4)
  }
  return this
}

Buffer.prototype.toString = function toString () {
  var length = this.length | 0
  if (length === 0) return ''
  if (arguments.length === 0) return utf8Slice(this, 0, length)
  return slowToString.apply(this, arguments)
}

Buffer.prototype.equals = function equals (b) {
  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
  if (this === b) return true
  return Buffer.compare(this, b) === 0
}

Buffer.prototype.inspect = function inspect () {
  var str = ''
  var max = exports.INSPECT_MAX_BYTES
  if (this.length > 0) {
    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')
    if (this.length > max) str += ' ... '
  }
  return '<Buffer ' + str + '>'
}

Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
  if (!Buffer.isBuffer(target)) {
    throw new TypeError('Argument must be a Buffer')
  }

  if (start === undefined) {
    start = 0
  }
  if (end === undefined) {
    end = target ? target.length : 0
  }
  if (thisStart === undefined) {
    thisStart = 0
  }
  if (thisEnd === undefined) {
    thisEnd = this.length
  }

  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
    throw new RangeError('out of range index')
  }

  if (thisStart >= thisEnd && start >= end) {
    return 0
  }
  if (thisStart >= thisEnd) {
    return -1
  }
  if (start >= end) {
    return 1
  }

  start >>>= 0
  end >>>= 0
  thisStart >>>= 0
  thisEnd >>>= 0

  if (this === target) return 0

  var x = thisEnd - thisStart
  var y = end - start
  var len = Math.min(x, y)

  var thisCopy = this.slice(thisStart, thisEnd)
  var targetCopy = target.slice(start, end)

  for (var i = 0; i < len; ++i) {
    if (thisCopy[i] !== targetCopy[i]) {
      x = thisCopy[i]
      y = targetCopy[i]
      break
    }
  }

  if (x < y) return -1
  if (y < x) return 1
  return 0
}

// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
//
// Arguments:
// - buffer - a Buffer to search
// - val - a string, Buffer, or number
// - byteOffset - an index into `buffer`; will be clamped to an int32
// - encoding - an optional encoding, relevant is val is a string
// - dir - true for indexOf, false for lastIndexOf
function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
  // Empty buffer means no match
  if (buffer.length === 0) return -1

  // Normalize byteOffset
  if (typeof byteOffset === 'string') {
    encoding = byteOffset
    byteOffset = 0
  } else if (byteOffset > 0x7fffffff) {
    byteOffset = 0x7fffffff
  } else if (byteOffset < -0x80000000) {
    byteOffset = -0x80000000
  }
  byteOffset = +byteOffset  // Coerce to Number.
  if (isNaN(byteOffset)) {
    // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
    byteOffset = dir ? 0 : (buffer.length - 1)
  }

  // Normalize byteOffset: negative offsets start from the end of the buffer
  if (byteOffset < 0) byteOffset = buffer.length + byteOffset
  if (byteOffset >= buffer.length) {
    if (dir) return -1
    else byteOffset = buffer.length - 1
  } else if (byteOffset < 0) {
    if (dir) byteOffset = 0
    else return -1
  }

  // Normalize val
  if (typeof val === 'string') {
    val = Buffer.from(val, encoding)
  }

  // Finally, search either indexOf (if dir is true) or lastIndexOf
  if (Buffer.isBuffer(val)) {
    // Special case: looking for empty string/buffer always fails
    if (val.length === 0) {
      return -1
    }
    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
  } else if (typeof val === 'number') {
    val = val & 0xFF // Search for a byte value [0-255]
    if (Buffer.TYPED_ARRAY_SUPPORT &&
        typeof Uint8Array.prototype.indexOf === 'function') {
      if (dir) {
        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
      } else {
        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
      }
    }
    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)
  }

  throw new TypeError('val must be string, number or Buffer')
}

function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
  var indexSize = 1
  var arrLength = arr.length
  var valLength = val.length

  if (encoding !== undefined) {
    encoding = String(encoding).toLowerCase()
    if (encoding === 'ucs2' || encoding === 'ucs-2' ||
        encoding === 'utf16le' || encoding === 'utf-16le') {
      if (arr.length < 2 || val.length < 2) {
        return -1
      }
      indexSize = 2
      arrLength /= 2
      valLength /= 2
      byteOffset /= 2
    }
  }

  function read (buf, i) {
    if (indexSize === 1) {
      return buf[i]
    } else {
      return buf.readUInt16BE(i * indexSize)
    }
  }

  var i
  if (dir) {
    var foundIndex = -1
    for (i = byteOffset; i < arrLength; i++) {
      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
        if (foundIndex === -1) foundIndex = i
        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
      } else {
        if (foundIndex !== -1) i -= i - foundIndex
        foundIndex = -1
      }
    }
  } else {
    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
    for (i = byteOffset; i >= 0; i--) {
      var found = true
      for (var j = 0; j < valLength; j++) {
        if (read(arr, i + j) !== read(val, j)) {
          found = false
          break
        }
      }
      if (found) return i
    }
  }

  return -1
}

Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
  return this.indexOf(val, byteOffset, encoding) !== -1
}

Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
}

Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
}

function hexWrite (buf, string, offset, length) {
  offset = Number(offset) || 0
  var remaining = buf.length - offset
  if (!length) {
    length = remaining
  } else {
    length = Number(length)
    if (length > remaining) {
      length = remaining
    }
  }

  // must be an even number of digits
  var strLen = string.length
  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')

  if (length > strLen / 2) {
    length = strLen / 2
  }
  for (var i = 0; i < length; ++i) {
    var parsed = parseInt(string.substr(i * 2, 2), 16)
    if (isNaN(parsed)) return i
    buf[offset + i] = parsed
  }
  return i
}

function utf8Write (buf, string, offset, length) {
  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
}

function asciiWrite (buf, string, offset, length) {
  return blitBuffer(asciiToBytes(string), buf, offset, length)
}

function latin1Write (buf, string, offset, length) {
  return asciiWrite(buf, string, offset, length)
}

function base64Write (buf, string, offset, length) {
  return blitBuffer(base64ToBytes(string), buf, offset, length)
}

function ucs2Write (buf, string, offset, length) {
  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
}

Buffer.prototype.write = function write (string, offset, length, encoding) {
  // Buffer#write(string)
  if (offset === undefined) {
    encoding = 'utf8'
    length = this.length
    offset = 0
  // Buffer#write(string, encoding)
  } else if (length === undefined && typeof offset === 'string') {
    encoding = offset
    length = this.length
    offset = 0
  // Buffer#write(string, offset[, length][, encoding])
  } else if (isFinite(offset)) {
    offset = offset | 0
    if (isFinite(length)) {
      length = length | 0
      if (encoding === undefined) encoding = 'utf8'
    } else {
      encoding = length
      length = undefined
    }
  // legacy write(string, encoding, offset, length) - remove in v0.13
  } else {
    throw new Error(
      'Buffer.write(string, encoding, offset[, length]) is no longer supported'
    )
  }

  var remaining = this.length - offset
  if (length === undefined || length > remaining) length = remaining

  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
    throw new RangeError('Attempt to write outside buffer bounds')
  }

  if (!encoding) encoding = 'utf8'

  var loweredCase = false
  for (;;) {
    switch (encoding) {
      case 'hex':
        return hexWrite(this, string, offset, length)

      case 'utf8':
      case 'utf-8':
        return utf8Write(this, string, offset, length)

      case 'ascii':
        return asciiWrite(this, string, offset, length)

      case 'latin1':
      case 'binary':
        return latin1Write(this, string, offset, length)

      case 'base64':
        // Warning: maxLength not taken into account in base64Write
        return base64Write(this, string, offset, length)

      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return ucs2Write(this, string, offset, length)

      default:
        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
        encoding = ('' + encoding).toLowerCase()
        loweredCase = true
    }
  }
}

Buffer.prototype.toJSON = function toJSON () {
  return {
    type: 'Buffer',
    data: Array.prototype.slice.call(this._arr || this, 0)
  }
}

function base64Slice (buf, start, end) {
  if (start === 0 && end === buf.length) {
    return base64.fromByteArray(buf)
  } else {
    return base64.fromByteArray(buf.slice(start, end))
  }
}

function utf8Slice (buf, start, end) {
  end = Math.min(buf.length, end)
  var res = []

  var i = start
  while (i < end) {
    var firstByte = buf[i]
    var codePoint = null
    var bytesPerSequence = (firstByte > 0xEF) ? 4
      : (firstByte > 0xDF) ? 3
      : (firstByte > 0xBF) ? 2
      : 1

    if (i + bytesPerSequence <= end) {
      var secondByte, thirdByte, fourthByte, tempCodePoint

      switch (bytesPerSequence) {
        case 1:
          if (firstByte < 0x80) {
            codePoint = firstByte
          }
          break
        case 2:
          secondByte = buf[i + 1]
          if ((secondByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
            if (tempCodePoint > 0x7F) {
              codePoint = tempCodePoint
            }
          }
          break
        case 3:
          secondByte = buf[i + 1]
          thirdByte = buf[i + 2]
          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
              codePoint = tempCodePoint
            }
          }
          break
        case 4:
          secondByte = buf[i + 1]
          thirdByte = buf[i + 2]
          fourthByte = buf[i + 3]
          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
              codePoint = tempCodePoint
            }
          }
      }
    }

    if (codePoint === null) {
      // we did not generate a valid codePoint so insert a
      // replacement char (U+FFFD) and advance only 1 byte
      codePoint = 0xFFFD
      bytesPerSequence = 1
    } else if (codePoint > 0xFFFF) {
      // encode to utf16 (surrogate pair dance)
      codePoint -= 0x10000
      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
      codePoint = 0xDC00 | codePoint & 0x3FF
    }

    res.push(codePoint)
    i += bytesPerSequence
  }

  return decodeCodePointsArray(res)
}

// Based on http://stackoverflow.com/a/22747272/680742, the browser with
// the lowest limit is Chrome, with 0x10000 args.
// We go 1 magnitude less, for safety
var MAX_ARGUMENTS_LENGTH = 0x1000

function decodeCodePointsArray (codePoints) {
  var len = codePoints.length
  if (len <= MAX_ARGUMENTS_LENGTH) {
    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
  }

  // Decode in chunks to avoid "call stack size exceeded".
  var res = ''
  var i = 0
  while (i < len) {
    res += String.fromCharCode.apply(
      String,
      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
    )
  }
  return res
}

function asciiSlice (buf, start, end) {
  var ret = ''
  end = Math.min(buf.length, end)

  for (var i = start; i < end; ++i) {
    ret += String.fromCharCode(buf[i] & 0x7F)
  }
  return ret
}

function latin1Slice (buf, start, end) {
  var ret = ''
  end = Math.min(buf.length, end)

  for (var i = start; i < end; ++i) {
    ret += String.fromCharCode(buf[i])
  }
  return ret
}

function hexSlice (buf, start, end) {
  var len = buf.length

  if (!start || start < 0) start = 0
  if (!end || end < 0 || end > len) end = len

  var out = ''
  for (var i = start; i < end; ++i) {
    out += toHex(buf[i])
  }
  return out
}

function utf16leSlice (buf, start, end) {
  var bytes = buf.slice(start, end)
  var res = ''
  for (var i = 0; i < bytes.length; i += 2) {
    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)
  }
  return res
}

Buffer.prototype.slice = function slice (start, end) {
  var len = this.length
  start = ~~start
  end = end === undefined ? len : ~~end

  if (start < 0) {
    start += len
    if (start < 0) start = 0
  } else if (start > len) {
    start = len
  }

  if (end < 0) {
    end += len
    if (end < 0) end = 0
  } else if (end > len) {
    end = len
  }

  if (end < start) end = start

  var newBuf
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    newBuf = this.subarray(start, end)
    newBuf.__proto__ = Buffer.prototype
  } else {
    var sliceLen = end - start
    newBuf = new Buffer(sliceLen, undefined)
    for (var i = 0; i < sliceLen; ++i) {
      newBuf[i] = this[i + start]
    }
  }

  return newBuf
}

/*
 * Need to make sure that buffer isn't trying to write out of bounds.
 */
function checkOffset (offset, ext, length) {
  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
}

Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var val = this[offset]
  var mul = 1
  var i = 0
  while (++i < byteLength && (mul *= 0x100)) {
    val += this[offset + i] * mul
  }

  return val
}

Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) {
    checkOffset(offset, byteLength, this.length)
  }

  var val = this[offset + --byteLength]
  var mul = 1
  while (byteLength > 0 && (mul *= 0x100)) {
    val += this[offset + --byteLength] * mul
  }

  return val
}

Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 1, this.length)
  return this[offset]
}

Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length)
  return this[offset] | (this[offset + 1] << 8)
}

Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length)
  return (this[offset] << 8) | this[offset + 1]
}

Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)

  return ((this[offset]) |
      (this[offset + 1] << 8) |
      (this[offset + 2] << 16)) +
      (this[offset + 3] * 0x1000000)
}

Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset] * 0x1000000) +
    ((this[offset + 1] << 16) |
    (this[offset + 2] << 8) |
    this[offset + 3])
}

Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var val = this[offset]
  var mul = 1
  var i = 0
  while (++i < byteLength && (mul *= 0x100)) {
    val += this[offset + i] * mul
  }
  mul *= 0x80

  if (val >= mul) val -= Math.pow(2, 8 * byteLength)

  return val
}

Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var i = byteLength
  var mul = 1
  var val = this[offset + --i]
  while (i > 0 && (mul *= 0x100)) {
    val += this[offset + --i] * mul
  }
  mul *= 0x80

  if (val >= mul) val -= Math.pow(2, 8 * byteLength)

  return val
}

Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 1, this.length)
  if (!(this[offset] & 0x80)) return (this[offset])
  return ((0xff - this[offset] + 1) * -1)
}

Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length)
  var val = this[offset] | (this[offset + 1] << 8)
  return (val & 0x8000) ? val | 0xFFFF0000 : val
}

Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length)
  var val = this[offset + 1] | (this[offset] << 8)
  return (val & 0x8000) ? val | 0xFFFF0000 : val
}

Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset]) |
    (this[offset + 1] << 8) |
    (this[offset + 2] << 16) |
    (this[offset + 3] << 24)
}

Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset] << 24) |
    (this[offset + 1] << 16) |
    (this[offset + 2] << 8) |
    (this[offset + 3])
}

Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)
  return ieee754.read(this, offset, true, 23, 4)
}

Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)
  return ieee754.read(this, offset, false, 23, 4)
}

Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 8, this.length)
  return ieee754.read(this, offset, true, 52, 8)
}

Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 8, this.length)
  return ieee754.read(this, offset, false, 52, 8)
}

function checkInt (buf, value, offset, ext, max, min) {
  if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
  if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
  if (offset + ext > buf.length) throw new RangeError('Index out of range')
}

Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) {
    var maxBytes = Math.pow(2, 8 * byteLength) - 1
    checkInt(this, value, offset, byteLength, maxBytes, 0)
  }

  var mul = 1
  var i = 0
  this[offset] = value & 0xFF
  while (++i < byteLength && (mul *= 0x100)) {
    this[offset + i] = (value / mul) & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) {
    var maxBytes = Math.pow(2, 8 * byteLength) - 1
    checkInt(this, value, offset, byteLength, maxBytes, 0)
  }

  var i = byteLength - 1
  var mul = 1
  this[offset + i] = value & 0xFF
  while (--i >= 0 && (mul *= 0x100)) {
    this[offset + i] = (value / mul) & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
  this[offset] = (value & 0xff)
  return offset + 1
}

function objectWriteUInt16 (buf, value, offset, littleEndian) {
  if (value < 0) value = 0xffff + value + 1
  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {
    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
      (littleEndian ? i : 1 - i) * 8
  }
}

Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value & 0xff)
    this[offset + 1] = (value >>> 8)
  } else {
    objectWriteUInt16(this, value, offset, true)
  }
  return offset + 2
}

Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 8)
    this[offset + 1] = (value & 0xff)
  } else {
    objectWriteUInt16(this, value, offset, false)
  }
  return offset + 2
}

function objectWriteUInt32 (buf, value, offset, littleEndian) {
  if (value < 0) value = 0xffffffff + value + 1
  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {
    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
  }
}

Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset + 3] = (value >>> 24)
    this[offset + 2] = (value >>> 16)
    this[offset + 1] = (value >>> 8)
    this[offset] = (value & 0xff)
  } else {
    objectWriteUInt32(this, value, offset, true)
  }
  return offset + 4
}

Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 24)
    this[offset + 1] = (value >>> 16)
    this[offset + 2] = (value >>> 8)
    this[offset + 3] = (value & 0xff)
  } else {
    objectWriteUInt32(this, value, offset, false)
  }
  return offset + 4
}

Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) {
    var limit = Math.pow(2, 8 * byteLength - 1)

    checkInt(this, value, offset, byteLength, limit - 1, -limit)
  }

  var i = 0
  var mul = 1
  var sub = 0
  this[offset] = value & 0xFF
  while (++i < byteLength && (mul *= 0x100)) {
    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
      sub = 1
    }
    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) {
    var limit = Math.pow(2, 8 * byteLength - 1)

    checkInt(this, value, offset, byteLength, limit - 1, -limit)
  }

  var i = byteLength - 1
  var mul = 1
  var sub = 0
  this[offset + i] = value & 0xFF
  while (--i >= 0 && (mul *= 0x100)) {
    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
      sub = 1
    }
    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
  if (value < 0) value = 0xff + value + 1
  this[offset] = (value & 0xff)
  return offset + 1
}

Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value & 0xff)
    this[offset + 1] = (value >>> 8)
  } else {
    objectWriteUInt16(this, value, offset, true)
  }
  return offset + 2
}

Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 8)
    this[offset + 1] = (value & 0xff)
  } else {
    objectWriteUInt16(this, value, offset, false)
  }
  return offset + 2
}

Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value & 0xff)
    this[offset + 1] = (value >>> 8)
    this[offset + 2] = (value >>> 16)
    this[offset + 3] = (value >>> 24)
  } else {
    objectWriteUInt32(this, value, offset, true)
  }
  return offset + 4
}

Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
  if (value < 0) value = 0xffffffff + value + 1
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 24)
    this[offset + 1] = (value >>> 16)
    this[offset + 2] = (value >>> 8)
    this[offset + 3] = (value & 0xff)
  } else {
    objectWriteUInt32(this, value, offset, false)
  }
  return offset + 4
}

function checkIEEE754 (buf, value, offset, ext, max, min) {
  if (offset + ext > buf.length) throw new RangeError('Index out of range')
  if (offset < 0) throw new RangeError('Index out of range')
}

function writeFloat (buf, value, offset, littleEndian, noAssert) {
  if (!noAssert) {
    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
  }
  ieee754.write(buf, value, offset, littleEndian, 23, 4)
  return offset + 4
}

Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
  return writeFloat(this, value, offset, true, noAssert)
}

Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
  return writeFloat(this, value, offset, false, noAssert)
}

function writeDouble (buf, value, offset, littleEndian, noAssert) {
  if (!noAssert) {
    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
  }
  ieee754.write(buf, value, offset, littleEndian, 52, 8)
  return offset + 8
}

Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
  return writeDouble(this, value, offset, true, noAssert)
}

Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
  return writeDouble(this, value, offset, false, noAssert)
}

// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
Buffer.prototype.copy = function copy (target, targetStart, start, end) {
  if (!start) start = 0
  if (!end && end !== 0) end = this.length
  if (targetStart >= target.length) targetStart = target.length
  if (!targetStart) targetStart = 0
  if (end > 0 && end < start) end = start

  // Copy 0 bytes; we're done
  if (end === start) return 0
  if (target.length === 0 || this.length === 0) return 0

  // Fatal error conditions
  if (targetStart < 0) {
    throw new RangeError('targetStart out of bounds')
  }
  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
  if (end < 0) throw new RangeError('sourceEnd out of bounds')

  // Are we oob?
  if (end > this.length) end = this.length
  if (target.length - targetStart < end - start) {
    end = target.length - targetStart + start
  }

  var len = end - start
  var i

  if (this === target && start < targetStart && targetStart < end) {
    // descending copy from end
    for (i = len - 1; i >= 0; --i) {
      target[i + targetStart] = this[i + start]
    }
  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
    // ascending copy from start
    for (i = 0; i < len; ++i) {
      target[i + targetStart] = this[i + start]
    }
  } else {
    Uint8Array.prototype.set.call(
      target,
      this.subarray(start, start + len),
      targetStart
    )
  }

  return len
}

// Usage:
//    buffer.fill(number[, offset[, end]])
//    buffer.fill(buffer[, offset[, end]])
//    buffer.fill(string[, offset[, end]][, encoding])
Buffer.prototype.fill = function fill (val, start, end, encoding) {
  // Handle string cases:
  if (typeof val === 'string') {
    if (typeof start === 'string') {
      encoding = start
      start = 0
      end = this.length
    } else if (typeof end === 'string') {
      encoding = end
      end = this.length
    }
    if (val.length === 1) {
      var code = val.charCodeAt(0)
      if (code < 256) {
        val = code
      }
    }
    if (encoding !== undefined && typeof encoding !== 'string') {
      throw new TypeError('encoding must be a string')
    }
    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
      throw new TypeError('Unknown encoding: ' + encoding)
    }
  } else if (typeof val === 'number') {
    val = val & 255
  }

  // Invalid ranges are not set to a default, so can range check early.
  if (start < 0 || this.length < start || this.length < end) {
    throw new RangeError('Out of range index')
  }

  if (end <= start) {
    return this
  }

  start = start >>> 0
  end = end === undefined ? this.length : end >>> 0

  if (!val) val = 0

  var i
  if (typeof val === 'number') {
    for (i = start; i < end; ++i) {
      this[i] = val
    }
  } else {
    var bytes = Buffer.isBuffer(val)
      ? val
      : utf8ToBytes(new Buffer(val, encoding).toString())
    var len = bytes.length
    for (i = 0; i < end - start; ++i) {
      this[i + start] = bytes[i % len]
    }
  }

  return this
}

// HELPER FUNCTIONS
// ================

var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g

function base64clean (str) {
  // Node strips out invalid characters like \n and \t from the string, base64-js does not
  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
  // Node converts strings with length < 2 to ''
  if (str.length < 2) return ''
  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
  while (str.length % 4 !== 0) {
    str = str + '='
  }
  return str
}

function stringtrim (str) {
  if (str.trim) return str.trim()
  return str.replace(/^\s+|\s+$/g, '')
}

function toHex (n) {
  if (n < 16) return '0' + n.toString(16)
  return n.toString(16)
}

function utf8ToBytes (string, units) {
  units = units || Infinity
  var codePoint
  var length = string.length
  var leadSurrogate = null
  var bytes = []

  for (var i = 0; i < length; ++i) {
    codePoint = string.charCodeAt(i)

    // is surrogate component
    if (codePoint > 0xD7FF && codePoint < 0xE000) {
      // last char was a lead
      if (!leadSurrogate) {
        // no lead yet
        if (codePoint > 0xDBFF) {
          // unexpected trail
          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
          continue
        } else if (i + 1 === length) {
          // unpaired lead
          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
          continue
        }

        // valid lead
        leadSurrogate = codePoint

        continue
      }

      // 2 leads in a row
      if (codePoint < 0xDC00) {
        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
        leadSurrogate = codePoint
        continue
      }

      // valid surrogate pair
      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
    } else if (leadSurrogate) {
      // valid bmp char, but last char was a lead
      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
    }

    leadSurrogate = null

    // encode utf8
    if (codePoint < 0x80) {
      if ((units -= 1) < 0) break
      bytes.push(codePoint)
    } else if (codePoint < 0x800) {
      if ((units -= 2) < 0) break
      bytes.push(
        codePoint >> 0x6 | 0xC0,
        codePoint & 0x3F | 0x80
      )
    } else if (codePoint < 0x10000) {
      if ((units -= 3) < 0) break
      bytes.push(
        codePoint >> 0xC | 0xE0,
        codePoint >> 0x6 & 0x3F | 0x80,
        codePoint & 0x3F | 0x80
      )
    } else if (codePoint < 0x110000) {
      if ((units -= 4) < 0) break
      bytes.push(
        codePoint >> 0x12 | 0xF0,
        codePoint >> 0xC & 0x3F | 0x80,
        codePoint >> 0x6 & 0x3F | 0x80,
        codePoint & 0x3F | 0x80
      )
    } else {
      throw new Error('Invalid code point')
    }
  }

  return bytes
}

function asciiToBytes (str) {
  var byteArray = []
  for (var i = 0; i < str.length; ++i) {
    // Node's code seems to be doing this and not & 0x7F..
    byteArray.push(str.charCodeAt(i) & 0xFF)
  }
  return byteArray
}

function utf16leToBytes (str, units) {
  var c, hi, lo
  var byteArray = []
  for (var i = 0; i < str.length; ++i) {
    if ((units -= 2) < 0) break

    c = str.charCodeAt(i)
    hi = c >> 8
    lo = c % 256
    byteArray.push(lo)
    byteArray.push(hi)
  }

  return byteArray
}

function base64ToBytes (str) {
  return base64.toByteArray(base64clean(str))
}

function blitBuffer (src, dst, offset, length) {
  for (var i = 0; i < length; ++i) {
    if ((i + offset >= dst.length) || (i >= src.length)) break
    dst[i + offset] = src[i]
  }
  return i
}

function isnan (val) {
  return val !== val // eslint-disable-line no-self-compare
}

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{"base64-js":3,"ieee754":18,"isarray":8}],8:[function(_dereq_,module,exports){
var toString = {}.toString;

module.exports = Array.isArray || function (arr) {
  return toString.call(arr) == '[object Array]';
};

},{}],9:[function(_dereq_,module,exports){
// Polyfill for creating CustomEvents on IE9/10/11

// code pulled from:
// https://github.com/d4tocchini/customevent-polyfill
// https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent#Polyfill

(function() {
  if (typeof window === 'undefined') {
    return;
  }

  try {
    var ce = new window.CustomEvent('test', { cancelable: true });
    ce.preventDefault();
    if (ce.defaultPrevented !== true) {
      // IE has problems with .preventDefault() on custom events
      // http://stackoverflow.com/questions/23349191
      throw new Error('Could not prevent default');
    }
  } catch (e) {
    var CustomEvent = function(event, params) {
      var evt, origPrevent;
      params = params || {};
      params.bubbles = !!params.bubbles;
      params.cancelable = !!params.cancelable;

      evt = document.createEvent('CustomEvent');
      evt.initCustomEvent(
        event,
        params.bubbles,
        params.cancelable,
        params.detail
      );
      origPrevent = evt.preventDefault;
      evt.preventDefault = function() {
        origPrevent.call(this);
        try {
          Object.defineProperty(this, 'defaultPrevented', {
            get: function() {
              return true;
            }
          });
        } catch (e) {
          this.defaultPrevented = true;
        }
      };
      return evt;
    };

    CustomEvent.prototype = window.Event.prototype;
    window.CustomEvent = CustomEvent; // expose definition to window
  }
})();

},{}],10:[function(_dereq_,module,exports){

/**
 * This is the web browser implementation of `debug()`.
 *
 * Expose `debug()` as the module.
 */

exports = module.exports = _dereq_('./debug');
exports.log = log;
exports.formatArgs = formatArgs;
exports.save = save;
exports.load = load;
exports.useColors = useColors;
exports.storage = 'undefined' != typeof chrome
               && 'undefined' != typeof chrome.storage
                  ? chrome.storage.local
                  : localstorage();

/**
 * Colors.
 */

exports.colors = [
  'lightseagreen',
  'forestgreen',
  'goldenrod',
  'dodgerblue',
  'darkorchid',
  'crimson'
];

/**
 * Currently only WebKit-based Web Inspectors, Firefox >= v31,
 * and the Firebug extension (any Firefox version) are known
 * to support "%c" CSS customizations.
 *
 * TODO: add a `localStorage` variable to explicitly enable/disable colors
 */

function useColors() {
  // is webkit? http://stackoverflow.com/a/16459606/376773
  return ('WebkitAppearance' in document.documentElement.style) ||
    // is firebug? http://stackoverflow.com/a/398120/376773
    (window.console && (console.firebug || (console.exception && console.table))) ||
    // is firefox >= v31?
    // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
    (navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31);
}

/**
 * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
 */

exports.formatters.j = function(v) {
  return JSON.stringify(v);
};


/**
 * Colorize log arguments if enabled.
 *
 * @api public
 */

function formatArgs() {
  var args = arguments;
  var useColors = this.useColors;

  args[0] = (useColors ? '%c' : '')
    + this.namespace
    + (useColors ? ' %c' : ' ')
    + args[0]
    + (useColors ? '%c ' : ' ');

  if (!useColors) return args;

  var c = 'color: ' + this.color;
  args = [args[0], c, 'color: inherit'].concat(Array.prototype.slice.call(args, 1));

  // the final "%c" is somewhat tricky, because there could be other
  // arguments passed either before or after the %c, so we need to
  // figure out the correct index to insert the CSS into
  var index = 0;
  var lastC = 0;
  args[0].replace(/%[a-z%]/g, function(match) {
    if ('%%' === match) return;
    index++;
    if ('%c' === match) {
      // we only are interested in the *last* %c
      // (the user may have provided their own)
      lastC = index;
    }
  });

  args.splice(lastC, 0, c);
  return args;
}

/**
 * Invokes `console.log()` when available.
 * No-op when `console.log` is not a "function".
 *
 * @api public
 */

function log() {
  // this hackery is required for IE8/9, where
  // the `console.log` function doesn't have 'apply'
  return 'object' === typeof console
    && console.log
    && Function.prototype.apply.call(console.log, console, arguments);
}

/**
 * Save `namespaces`.
 *
 * @param {String} namespaces
 * @api private
 */

function save(namespaces) {
  try {
    if (null == namespaces) {
      exports.storage.removeItem('debug');
    } else {
      exports.storage.debug = namespaces;
    }
  } catch(e) {}
}

/**
 * Load `namespaces`.
 *
 * @return {String} returns the previously persisted debug modes
 * @api private
 */

function load() {
  var r;
  try {
    r = exports.storage.debug;
  } catch(e) {}
  return r;
}

/**
 * Enable namespaces listed in `localStorage.debug` initially.
 */

exports.enable(load());

/**
 * Localstorage attempts to return the localstorage.
 *
 * This is necessary because safari throws
 * when a user disables cookies/localstorage
 * and you attempt to access it.
 *
 * @return {LocalStorage}
 * @api private
 */

function localstorage(){
  try {
    return window.localStorage;
  } catch (e) {}
}

},{"./debug":11}],11:[function(_dereq_,module,exports){

/**
 * This is the common logic for both the Node.js and web browser
 * implementations of `debug()`.
 *
 * Expose `debug()` as the module.
 */

exports = module.exports = debug;
exports.coerce = coerce;
exports.disable = disable;
exports.enable = enable;
exports.enabled = enabled;

/**
 * The currently active debug mode names, and names to skip.
 */

exports.names = [];
exports.skips = [];

/**
 * Map of special "%n" handling functions, for the debug "format" argument.
 *
 * Valid key names are a single, lowercased letter, i.e. "n".
 */

exports.formatters = {};

/**
 * Previously assigned color.
 */

var prevColor = 0;

/**
 * Select a color.
 *
 * @return {Number}
 * @api private
 */

function selectColor() {
  return exports.colors[prevColor++ % exports.colors.length];
}

/**
 * Create a debugger with the given `namespace`.
 *
 * @param {String} namespace
 * @return {Function}
 * @api public
 */

function debug(namespace) {

  // define the `disabled` version
  function disabled() {
  }
  disabled.enabled = false;

  // define the `enabled` version
  function enabled() {

    var self = enabled;

    // add the `color` if not set
    if (null == self.useColors) self.useColors = exports.useColors();
    if (null == self.color && self.useColors) self.color = selectColor();

    var args = Array.prototype.slice.call(arguments);

    args[0] = exports.coerce(args[0]);

    if ('string' !== typeof args[0]) {
      // anything else let's inspect with %o
      args = ['%o'].concat(args);
    }

    // apply any `formatters` transformations
    var index = 0;
    args[0] = args[0].replace(/%([a-z%])/g, function(match, format) {
      // if we encounter an escaped % then don't increase the array index
      if (match === '%%') return match;
      index++;
      var formatter = exports.formatters[format];
      if ('function' === typeof formatter) {
        var val = args[index];
        match = formatter.call(self, val);

        // now we need to remove `args[index]` since it's inlined in the `format`
        args.splice(index, 1);
        index--;
      }
      return match;
    });

    if ('function' === typeof exports.formatArgs) {
      args = exports.formatArgs.apply(self, args);
    }
    var logFn = enabled.log || exports.log || console.log.bind(console);
    logFn.apply(self, args);
  }
  enabled.enabled = true;

  var fn = exports.enabled(namespace) ? enabled : disabled;

  fn.namespace = namespace;

  return fn;
}

/**
 * Enables a debug mode by namespaces. This can include modes
 * separated by a colon and wildcards.
 *
 * @param {String} namespaces
 * @api public
 */

function enable(namespaces) {
  exports.save(namespaces);

  var split = (namespaces || '').split(/[\s,]+/);
  var len = split.length;

  for (var i = 0; i < len; i++) {
    if (!split[i]) continue; // ignore empty strings
    namespaces = split[i].replace(/\*/g, '.*?');
    if (namespaces[0] === '-') {
      exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
    } else {
      exports.names.push(new RegExp('^' + namespaces + '$'));
    }
  }
}

/**
 * Disable debug output.
 *
 * @api public
 */

function disable() {
  exports.enable('');
}

/**
 * Returns true if the given mode name is enabled, false otherwise.
 *
 * @param {String} name
 * @return {Boolean}
 * @api public
 */

function enabled(name) {
  var i, len;
  for (i = 0, len = exports.skips.length; i < len; i++) {
    if (exports.skips[i].test(name)) {
      return false;
    }
  }
  for (i = 0, len = exports.names.length; i < len; i++) {
    if (exports.names[i].test(name)) {
      return true;
    }
  }
  return false;
}

/**
 * Coerce `val`.
 *
 * @param {Mixed} val
 * @return {Mixed}
 * @api private
 */

function coerce(val) {
  if (val instanceof Error) return val.stack || val.message;
  return val;
}

},{}],12:[function(_dereq_,module,exports){
'use strict';
var isObj = _dereq_('is-obj');
var hasOwnProperty = Object.prototype.hasOwnProperty;
var propIsEnumerable = Object.prototype.propertyIsEnumerable;

function toObject(val) {
	if (val === null || val === undefined) {
		throw new TypeError('Sources cannot be null or undefined');
	}

	return Object(val);
}

function assignKey(to, from, key) {
	var val = from[key];

	if (val === undefined || val === null) {
		return;
	}

	if (hasOwnProperty.call(to, key)) {
		if (to[key] === undefined || to[key] === null) {
			throw new TypeError('Cannot convert undefined or null to object (' + key + ')');
		}
	}

	if (!hasOwnProperty.call(to, key) || !isObj(val)) {
		to[key] = val;
	} else {
		to[key] = assign(Object(to[key]), from[key]);
	}
}

function assign(to, from) {
	if (to === from) {
		return to;
	}

	from = Object(from);

	for (var key in from) {
		if (hasOwnProperty.call(from, key)) {
			assignKey(to, from, key);
		}
	}

	if (Object.getOwnPropertySymbols) {
		var symbols = Object.getOwnPropertySymbols(from);

		for (var i = 0; i < symbols.length; i++) {
			if (propIsEnumerable.call(from, symbols[i])) {
				assignKey(to, from, symbols[i]);
			}
		}
	}

	return to;
}

module.exports = function deepAssign(target) {
	target = toObject(target);

	for (var s = 1; s < arguments.length; s++) {
		assign(target, arguments[s]);
	}

	return target;
};

},{"is-obj":23}],13:[function(_dereq_,module,exports){
/*! (C) WebReflection Mit Style License */
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},{}],14:[function(_dereq_,module,exports){
module.exports = function(dtype) {
  switch (dtype) {
    case 'int8':
      return Int8Array
    case 'int16':
      return Int16Array
    case 'int32':
      return Int32Array
    case 'uint8':
      return Uint8Array
    case 'uint16':
      return Uint16Array
    case 'uint32':
      return Uint32Array
    case 'float32':
      return Float32Array
    case 'float64':
      return Float64Array
    case 'array':
      return Array
    case 'uint8_clamped':
      return Uint8ClampedArray
  }
}

},{}],15:[function(_dereq_,module,exports){
/*eslint new-cap:0*/
var dtype = _dereq_('dtype')

module.exports = flattenVertexData

function flattenVertexData (data, output, offset) {
  if (!data) throw new TypeError('must specify data as first parameter')
  offset = +(offset || 0) | 0

  if (Array.isArray(data) && (data[0] && typeof data[0][0] === 'number')) {
    var dim = data[0].length
    var length = data.length * dim
    var i, j, k, l

    // no output specified, create a new typed array
    if (!output || typeof output === 'string') {
      output = new (dtype(output || 'float32'))(length + offset)
    }

    var dstLength = output.length - offset
    if (length !== dstLength) {
      throw new Error('source length ' + length + ' (' + dim + 'x' + data.length + ')' +
        ' does not match destination length ' + dstLength)
    }

    for (i = 0, k = offset; i < data.length; i++) {
      for (j = 0; j < dim; j++) {
        output[k++] = data[i][j] === null ? NaN : data[i][j]
      }
    }
  } else {
    if (!output || typeof output === 'string') {
      // no output, create a new one
      var Ctor = dtype(output || 'float32')

      // handle arrays separately due to possible nulls
      if (Array.isArray(data) || output === 'array') {
        output = new Ctor(data.length + offset)
        for (i = 0, k = offset, l = output.length; k < l; k++, i++) {
          output[k] = data[i] === null ? NaN : data[i]
        }
      } else {
        if (offset === 0) {
          output = new Ctor(data)
        } else {
          output = new Ctor(data.length + offset)

          output.set(data, offset)
        }
      }
    } else {
      // store output in existing array
      output.set(data, offset)
    }
  }

  return output
}

},{"dtype":14}],16:[function(_dereq_,module,exports){
'use strict';

var isCallable = _dereq_('is-callable');

var toStr = Object.prototype.toString;
var hasOwnProperty = Object.prototype.hasOwnProperty;

var forEachArray = function forEachArray(array, iterator, receiver) {
    for (var i = 0, len = array.length; i < len; i++) {
        if (hasOwnProperty.call(array, i)) {
            if (receiver == null) {
                iterator(array[i], i, array);
            } else {
                iterator.call(receiver, array[i], i, array);
            }
        }
    }
};

var forEachString = function forEachString(string, iterator, receiver) {
    for (var i = 0, len = string.length; i < len; i++) {
        // no such thing as a sparse string.
        if (receiver == null) {
            iterator(string.charAt(i), i, string);
        } else {
            iterator.call(receiver, string.charAt(i), i, string);
        }
    }
};

var forEachObject = function forEachObject(object, iterator, receiver) {
    for (var k in object) {
        if (hasOwnProperty.call(object, k)) {
            if (receiver == null) {
                iterator(object[k], k, object);
            } else {
                iterator.call(receiver, object[k], k, object);
            }
        }
    }
};

var forEach = function forEach(list, iterator, thisArg) {
    if (!isCallable(iterator)) {
        throw new TypeError('iterator must be a function');
    }

    var receiver;
    if (arguments.length >= 3) {
        receiver = thisArg;
    }

    if (toStr.call(list) === '[object Array]') {
        forEachArray(list, iterator, receiver);
    } else if (typeof list === 'string') {
        forEachString(list, iterator, receiver);
    } else {
        forEachObject(list, iterator, receiver);
    }
};

module.exports = forEach;

},{"is-callable":21}],17:[function(_dereq_,module,exports){
(function (global){
var win;

if (typeof window !== "undefined") {
    win = window;
} else if (typeof global !== "undefined") {
    win = global;
} else if (typeof self !== "undefined"){
    win = self;
} else {
    win = {};
}

module.exports = win;

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{}],18:[function(_dereq_,module,exports){
exports.read = function (buffer, offset, isLE, mLen, nBytes) {
  var e, m
  var eLen = (nBytes * 8) - mLen - 1
  var eMax = (1 << eLen) - 1
  var eBias = eMax >> 1
  var nBits = -7
  var i = isLE ? (nBytes - 1) : 0
  var d = isLE ? -1 : 1
  var s = buffer[offset + i]

  i += d

  e = s & ((1 << (-nBits)) - 1)
  s >>= (-nBits)
  nBits += eLen
  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}

  m = e & ((1 << (-nBits)) - 1)
  e >>= (-nBits)
  nBits += mLen
  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}

  if (e === 0) {
    e = 1 - eBias
  } else if (e === eMax) {
    return m ? NaN : ((s ? -1 : 1) * Infinity)
  } else {
    m = m + Math.pow(2, mLen)
    e = e - eBias
  }
  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
}

exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
  var e, m, c
  var eLen = (nBytes * 8) - mLen - 1
  var eMax = (1 << eLen) - 1
  var eBias = eMax >> 1
  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
  var i = isLE ? 0 : (nBytes - 1)
  var d = isLE ? 1 : -1
  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0

  value = Math.abs(value)

  if (isNaN(value) || value === Infinity) {
    m = isNaN(value) ? 1 : 0
    e = eMax
  } else {
    e = Math.floor(Math.log(value) / Math.LN2)
    if (value * (c = Math.pow(2, -e)) < 1) {
      e--
      c *= 2
    }
    if (e + eBias >= 1) {
      value += rt / c
    } else {
      value += rt * Math.pow(2, 1 - eBias)
    }
    if (value * c >= 2) {
      e++
      c /= 2
    }

    if (e + eBias >= eMax) {
      m = 0
      e = eMax
    } else if (e + eBias >= 1) {
      m = ((value * c) - 1) * Math.pow(2, mLen)
      e = e + eBias
    } else {
      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
      e = 0
    }
  }

  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}

  e = (e << mLen) | m
  eLen += mLen
  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}

  buffer[offset + i - d] |= s * 128
}

},{}],19:[function(_dereq_,module,exports){
if (typeof Object.create === 'function') {
  // implementation from standard node.js 'util' module
  module.exports = function inherits(ctor, superCtor) {
    ctor.super_ = superCtor
    ctor.prototype = Object.create(superCtor.prototype, {
      constructor: {
        value: ctor,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
  };
} else {
  // old school shim for old browsers
  module.exports = function inherits(ctor, superCtor) {
    ctor.super_ = superCtor
    var TempCtor = function () {}
    TempCtor.prototype = superCtor.prototype
    ctor.prototype = new TempCtor()
    ctor.prototype.constructor = ctor
  }
}

},{}],20:[function(_dereq_,module,exports){
/*!
 * Determine if an object is a Buffer
 *
 * @author   Feross Aboukhadijeh <https://feross.org>
 * @license  MIT
 */

// The _isBuffer check is for Safari 5-7 support, because it's missing
// Object.prototype.constructor. Remove this eventually
module.exports = function (obj) {
  return obj != null && (isBuffer(obj) || isSlowBuffer(obj) || !!obj._isBuffer)
}

function isBuffer (obj) {
  return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
}

// For Node v0.10 support. Remove this eventually.
function isSlowBuffer (obj) {
  return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isBuffer(obj.slice(0, 0))
}

},{}],21:[function(_dereq_,module,exports){
'use strict';

var fnToStr = Function.prototype.toString;

var constructorRegex = /^\s*class\b/;
var isES6ClassFn = function isES6ClassFunction(value) {
	try {
		var fnStr = fnToStr.call(value);
		return constructorRegex.test(fnStr);
	} catch (e) {
		return false; // not a function
	}
};

var tryFunctionObject = function tryFunctionToStr(value) {
	try {
		if (isES6ClassFn(value)) { return false; }
		fnToStr.call(value);
		return true;
	} catch (e) {
		return false;
	}
};
var toStr = Object.prototype.toString;
var fnClass = '[object Function]';
var genClass = '[object GeneratorFunction]';
var hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';

module.exports = function isCallable(value) {
	if (!value) { return false; }
	if (typeof value !== 'function' && typeof value !== 'object') { return false; }
	if (typeof value === 'function' && !value.prototype) { return true; }
	if (hasToStringTag) { return tryFunctionObject(value); }
	if (isES6ClassFn(value)) { return false; }
	var strClass = toStr.call(value);
	return strClass === fnClass || strClass === genClass;
};

},{}],22:[function(_dereq_,module,exports){
module.exports = isFunction

var toString = Object.prototype.toString

function isFunction (fn) {
  var string = toString.call(fn)
  return string === '[object Function]' ||
    (typeof fn === 'function' && string !== '[object RegExp]') ||
    (typeof window !== 'undefined' &&
     // IE8 and below
     (fn === window.setTimeout ||
      fn === window.alert ||
      fn === window.confirm ||
      fn === window.prompt))
};

},{}],23:[function(_dereq_,module,exports){
'use strict';
module.exports = function (x) {
	var type = typeof x;
	return x !== null && (type === 'object' || type === 'function');
};

},{}],24:[function(_dereq_,module,exports){
var wordWrap = _dereq_('word-wrapper')
var xtend = _dereq_('xtend')
var number = _dereq_('as-number')

var X_HEIGHTS = ['x', 'e', 'a', 'o', 'n', 's', 'r', 'c', 'u', 'm', 'v', 'w', 'z']
var M_WIDTHS = ['m', 'w']
var CAP_HEIGHTS = ['H', 'I', 'N', 'E', 'F', 'K', 'L', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z']


var TAB_ID = '\t'.charCodeAt(0)
var SPACE_ID = ' '.charCodeAt(0)
var ALIGN_LEFT = 0, 
    ALIGN_CENTER = 1, 
    ALIGN_RIGHT = 2

module.exports = function createLayout(opt) {
  return new TextLayout(opt)
}

function TextLayout(opt) {
  this.glyphs = []
  this._measure = this.computeMetrics.bind(this)
  this.update(opt)
}

TextLayout.prototype.update = function(opt) {
  opt = xtend({
    measure: this._measure
  }, opt)
  this._opt = opt
  this._opt.tabSize = number(this._opt.tabSize, 4)

  if (!opt.font)
    throw new Error('must provide a valid bitmap font')

  var glyphs = this.glyphs
  var text = opt.text||'' 
  var font = opt.font
  this._setupSpaceGlyphs(font)
  
  var lines = wordWrap.lines(text, opt)
  var minWidth = opt.width || 0

  //clear glyphs
  glyphs.length = 0

  //get max line width
  var maxLineWidth = lines.reduce(function(prev, line) {
    return Math.max(prev, line.width, minWidth)
  }, 0)

  //the pen position
  var x = 0
  var y = 0
  var lineHeight = number(opt.lineHeight, font.common.lineHeight)
  var baseline = font.common.base
  var descender = lineHeight-baseline
  var letterSpacing = opt.letterSpacing || 0
  var height = lineHeight * lines.length - descender
  var align = getAlignType(this._opt.align)

  //draw text along baseline
  y -= height
  
  //the metrics for this text layout
  this._width = maxLineWidth
  this._height = height
  this._descender = lineHeight - baseline
  this._baseline = baseline
  this._xHeight = getXHeight(font)
  this._capHeight = getCapHeight(font)
  this._lineHeight = lineHeight
  this._ascender = lineHeight - descender - this._xHeight
    
  //layout each glyph
  var self = this
  lines.forEach(function(line, lineIndex) {
    var start = line.start
    var end = line.end
    var lineWidth = line.width
    var lastGlyph
    
    //for each glyph in that line...
    for (var i=start; i<end; i++) {
      var id = text.charCodeAt(i)
      var glyph = self.getGlyph(font, id)
      if (glyph) {
        if (lastGlyph) 
          x += getKerning(font, lastGlyph.id, glyph.id)

        var tx = x
        if (align === ALIGN_CENTER) 
          tx += (maxLineWidth-lineWidth)/2
        else if (align === ALIGN_RIGHT)
          tx += (maxLineWidth-lineWidth)

        glyphs.push({
          position: [tx, y],
          data: glyph,
          index: i,
          line: lineIndex
        })  

        //move pen forward
        x += glyph.xadvance + letterSpacing
        lastGlyph = glyph
      }
    }

    //next line down
    y += lineHeight
    x = 0
  })
  this._linesTotal = lines.length;
}

TextLayout.prototype._setupSpaceGlyphs = function(font) {
  //These are fallbacks, when the font doesn't include
  //' ' or '\t' glyphs
  this._fallbackSpaceGlyph = null
  this._fallbackTabGlyph = null

  if (!font.chars || font.chars.length === 0)
    return

  //try to get space glyph
  //then fall back to the 'm' or 'w' glyphs
  //then fall back to the first glyph available
  var space = getGlyphById(font, SPACE_ID) 
          || getMGlyph(font) 
          || font.chars[0]

  //and create a fallback for tab
  var tabWidth = this._opt.tabSize * space.xadvance
  this._fallbackSpaceGlyph = space
  this._fallbackTabGlyph = xtend(space, {
    x: 0, y: 0, xadvance: tabWidth, id: TAB_ID, 
    xoffset: 0, yoffset: 0, width: 0, height: 0
  })
}

TextLayout.prototype.getGlyph = function(font, id) {
  var glyph = getGlyphById(font, id)
  if (glyph)
    return glyph
  else if (id === TAB_ID) 
    return this._fallbackTabGlyph
  else if (id === SPACE_ID) 
    return this._fallbackSpaceGlyph
  return null
}

TextLayout.prototype.computeMetrics = function(text, start, end, width) {
  var letterSpacing = this._opt.letterSpacing || 0
  var font = this._opt.font
  var curPen = 0
  var curWidth = 0
  var count = 0
  var glyph
  var lastGlyph

  if (!font.chars || font.chars.length === 0) {
    return {
      start: start,
      end: start,
      width: 0
    }
  }

  end = Math.min(text.length, end)
  for (var i=start; i < end; i++) {
    var id = text.charCodeAt(i)
    var glyph = this.getGlyph(font, id)

    if (glyph) {
      //move pen forward
      var xoff = glyph.xoffset
      var kern = lastGlyph ? getKerning(font, lastGlyph.id, glyph.id) : 0
      curPen += kern

      var nextPen = curPen + glyph.xadvance + letterSpacing
      var nextWidth = curPen + glyph.width

      //we've hit our limit; we can't move onto the next glyph
      if (nextWidth >= width || nextPen >= width)
        break

      //otherwise continue along our line
      curPen = nextPen
      curWidth = nextWidth
      lastGlyph = glyph
    }
    count++
  }
  
  //make sure rightmost edge lines up with rendered glyphs
  if (lastGlyph)
    curWidth += lastGlyph.xoffset

  return {
    start: start,
    end: start + count,
    width: curWidth
  }
}

//getters for the private vars
;['width', 'height', 
  'descender', 'ascender',
  'xHeight', 'baseline',
  'capHeight',
  'lineHeight' ].forEach(addGetter)

function addGetter(name) {
  Object.defineProperty(TextLayout.prototype, name, {
    get: wrapper(name),
    configurable: true
  })
}

//create lookups for private vars
function wrapper(name) {
  return (new Function([
    'return function '+name+'() {',
    '  return this._'+name,
    '}'
  ].join('\n')))()
}

function getGlyphById(font, id) {
  if (!font.chars || font.chars.length === 0)
    return null

  var glyphIdx = findChar(font.chars, id)
  if (glyphIdx >= 0)
    return font.chars[glyphIdx]
  return null
}

function getXHeight(font) {
  for (var i=0; i<X_HEIGHTS.length; i++) {
    var id = X_HEIGHTS[i].charCodeAt(0)
    var idx = findChar(font.chars, id)
    if (idx >= 0) 
      return font.chars[idx].height
  }
  return 0
}

function getMGlyph(font) {
  for (var i=0; i<M_WIDTHS.length; i++) {
    var id = M_WIDTHS[i].charCodeAt(0)
    var idx = findChar(font.chars, id)
    if (idx >= 0) 
      return font.chars[idx]
  }
  return 0
}

function getCapHeight(font) {
  for (var i=0; i<CAP_HEIGHTS.length; i++) {
    var id = CAP_HEIGHTS[i].charCodeAt(0)
    var idx = findChar(font.chars, id)
    if (idx >= 0) 
      return font.chars[idx].height
  }
  return 0
}

function getKerning(font, left, right) {
  if (!font.kernings || font.kernings.length === 0)
    return 0

  var table = font.kernings
  for (var i=0; i<table.length; i++) {
    var kern = table[i]
    if (kern.first === left && kern.second === right)
      return kern.amount
  }
  return 0
}

function getAlignType(align) {
  if (align === 'center')
    return ALIGN_CENTER
  else if (align === 'right')
    return ALIGN_RIGHT
  return ALIGN_LEFT
}

function findChar (array, value, start) {
  start = start || 0
  for (var i = start; i < array.length; i++) {
    if (array[i].id === value) {
      return i
    }
  }
  return -1
}
},{"as-number":2,"word-wrapper":51,"xtend":54}],25:[function(_dereq_,module,exports){
(function (Buffer){
var xhr = _dereq_('xhr')
var noop = function(){}
var parseASCII = _dereq_('parse-bmfont-ascii')
var parseXML = _dereq_('parse-bmfont-xml')
var readBinary = _dereq_('parse-bmfont-binary')
var isBinaryFormat = _dereq_('./lib/is-binary')
var xtend = _dereq_('xtend')

var xml2 = (function hasXML2() {
  return window.XMLHttpRequest && "withCredentials" in new XMLHttpRequest
})()

module.exports = function(opt, cb) {
  cb = typeof cb === 'function' ? cb : noop

  if (typeof opt === 'string')
    opt = { uri: opt }
  else if (!opt)
    opt = {}

  var expectBinary = opt.binary
  if (expectBinary)
    opt = getBinaryOpts(opt)

  xhr(opt, function(err, res, body) {
    if (err)
      return cb(err)
    if (!/^2/.test(res.statusCode))
      return cb(new Error('http status code: '+res.statusCode))
    if (!body)
      return cb(new Error('no body result'))

    var binary = false 

    //if the response type is an array buffer,
    //we need to convert it into a regular Buffer object
    if (isArrayBuffer(body)) {
      var array = new Uint8Array(body)
      body = new Buffer(array, 'binary')
    }

    //now check the string/Buffer response
    //and see if it has a binary BMF header
    if (isBinaryFormat(body)) {
      binary = true
      //if we have a string, turn it into a Buffer
      if (typeof body === 'string') 
        body = new Buffer(body, 'binary')
    } 

    //we are not parsing a binary format, just ASCII/XML/etc
    if (!binary) {
      //might still be a buffer if responseType is 'arraybuffer'
      if (Buffer.isBuffer(body))
        body = body.toString(opt.encoding)
      body = body.trim()
    }

    var result
    try {
      var type = res.headers['content-type']
      if (binary)
        result = readBinary(body)
      else if (/json/.test(type) || body.charAt(0) === '{')
        result = JSON.parse(body)
      else if (/xml/.test(type)  || body.charAt(0) === '<')
        result = parseXML(body)
      else
        result = parseASCII(body)
    } catch (e) {
      cb(new Error('error parsing font '+e.message))
      cb = noop
    }
    cb(null, result)
  })
}

function isArrayBuffer(arr) {
  var str = Object.prototype.toString
  return str.call(arr) === '[object ArrayBuffer]'
}

function getBinaryOpts(opt) {
  //IE10+ and other modern browsers support array buffers
  if (xml2)
    return xtend(opt, { responseType: 'arraybuffer' })
  
  if (typeof window.XMLHttpRequest === 'undefined')
    throw new Error('your browser does not support XHR loading')

  //IE9 and XML1 browsers could still use an override
  var req = new window.XMLHttpRequest()
  req.overrideMimeType('text/plain; charset=x-user-defined')
  return xtend({
    xhr: req
  }, opt)
}
}).call(this,_dereq_("buffer").Buffer)

},{"./lib/is-binary":26,"buffer":7,"parse-bmfont-ascii":28,"parse-bmfont-binary":29,"parse-bmfont-xml":30,"xhr":52,"xtend":54}],26:[function(_dereq_,module,exports){
(function (Buffer){
var equal = _dereq_('buffer-equal')
var HEADER = new Buffer([66, 77, 70, 3])

module.exports = function(buf) {
  if (typeof buf === 'string')
    return buf.substring(0, 3) === 'BMF'
  return buf.length > 4 && equal(buf.slice(0, 4), HEADER)
}
}).call(this,_dereq_("buffer").Buffer)

},{"buffer":7,"buffer-equal":6}],27:[function(_dereq_,module,exports){
/* eslint-disable no-unused-vars */
'use strict';
var hasOwnProperty = Object.prototype.hasOwnProperty;
var propIsEnumerable = Object.prototype.propertyIsEnumerable;

function toObject(val) {
	if (val === null || val === undefined) {
		throw new TypeError('Object.assign cannot be called with null or undefined');
	}

	return Object(val);
}

module.exports = Object.assign || function (target, source) {
	var from;
	var to = toObject(target);
	var symbols;

	for (var s = 1; s < arguments.length; s++) {
		from = Object(arguments[s]);

		for (var key in from) {
			if (hasOwnProperty.call(from, key)) {
				to[key] = from[key];
			}
		}

		if (Object.getOwnPropertySymbols) {
			symbols = Object.getOwnPropertySymbols(from);
			for (var i = 0; i < symbols.length; i++) {
				if (propIsEnumerable.call(from, symbols[i])) {
					to[symbols[i]] = from[symbols[i]];
				}
			}
		}
	}

	return to;
};

},{}],28:[function(_dereq_,module,exports){
module.exports = function parseBMFontAscii(data) {
  if (!data)
    throw new Error('no data provided')
  data = data.toString().trim()

  var output = {
    pages: [],
    chars: [],
    kernings: []
  }

  var lines = data.split(/\r\n?|\n/g)

  if (lines.length === 0)
    throw new Error('no data in BMFont file')

  for (var i = 0; i < lines.length; i++) {
    var lineData = splitLine(lines[i], i)
    if (!lineData) //skip empty lines
      continue

    if (lineData.key === 'page') {
      if (typeof lineData.data.id !== 'number')
        throw new Error('malformed file at line ' + i + ' -- needs page id=N')
      if (typeof lineData.data.file !== 'string')
        throw new Error('malformed file at line ' + i + ' -- needs page file="path"')
      output.pages[lineData.data.id] = lineData.data.file
    } else if (lineData.key === 'chars' || lineData.key === 'kernings') {
      //... do nothing for these two ...
    } else if (lineData.key === 'char') {
      output.chars.push(lineData.data)
    } else if (lineData.key === 'kerning') {
      output.kernings.push(lineData.data)
    } else {
      output[lineData.key] = lineData.data
    }
  }

  return output
}

function splitLine(line, idx) {
  line = line.replace(/\t+/g, ' ').trim()
  if (!line)
    return null

  var space = line.indexOf(' ')
  if (space === -1) 
    throw new Error("no named row at line " + idx)

  var key = line.substring(0, space)

  line = line.substring(space + 1)
  //clear "letter" field as it is non-standard and
  //requires additional complexity to parse " / = symbols
  line = line.replace(/letter=[\'\"]\S+[\'\"]/gi, '')  
  line = line.split("=")
  line = line.map(function(str) {
    return str.trim().match((/(".*?"|[^"\s]+)+(?=\s*|\s*$)/g))
  })

  var data = []
  for (var i = 0; i < line.length; i++) {
    var dt = line[i]
    if (i === 0) {
      data.push({
        key: dt[0],
        data: ""
      })
    } else if (i === line.length - 1) {
      data[data.length - 1].data = parseData(dt[0])
    } else {
      data[data.length - 1].data = parseData(dt[0])
      data.push({
        key: dt[1],
        data: ""
      })
    }
  }

  var out = {
    key: key,
    data: {}
  }

  data.forEach(function(v) {
    out.data[v.key] = v.data;
  })

  return out
}

function parseData(data) {
  if (!data || data.length === 0)
    return ""

  if (data.indexOf('"') === 0 || data.indexOf("'") === 0)
    return data.substring(1, data.length - 1)
  if (data.indexOf(',') !== -1)
    return parseIntList(data)
  return parseInt(data, 10)
}

function parseIntList(data) {
  return data.split(',').map(function(val) {
    return parseInt(val, 10)
  })
}
},{}],29:[function(_dereq_,module,exports){
var HEADER = [66, 77, 70]

module.exports = function readBMFontBinary(buf) {
  if (buf.length < 6)
    throw new Error('invalid buffer length for BMFont')

  var header = HEADER.every(function(byte, i) {
    return buf.readUInt8(i) === byte
  })

  if (!header)
    throw new Error('BMFont missing BMF byte header')

  var i = 3
  var vers = buf.readUInt8(i++)
  if (vers > 3)
    throw new Error('Only supports BMFont Binary v3 (BMFont App v1.10)')
  
  var target = { kernings: [], chars: [] }
  for (var b=0; b<5; b++)
    i += readBlock(target, buf, i)
  return target
}

function readBlock(target, buf, i) {
  if (i > buf.length-1)
    return 0

  var blockID = buf.readUInt8(i++)
  var blockSize = buf.readInt32LE(i)
  i += 4

  switch(blockID) {
    case 1: 
      target.info = readInfo(buf, i)
      break
    case 2:
      target.common = readCommon(buf, i)
      break
    case 3:
      target.pages = readPages(buf, i, blockSize)
      break
    case 4:
      target.chars = readChars(buf, i, blockSize)
      break
    case 5:
      target.kernings = readKernings(buf, i, blockSize)
      break
  }
  return 5 + blockSize
}

function readInfo(buf, i) {
  var info = {}
  info.size = buf.readInt16LE(i)

  var bitField = buf.readUInt8(i+2)
  info.smooth = (bitField >> 7) & 1
  info.unicode = (bitField >> 6) & 1
  info.italic = (bitField >> 5) & 1
  info.bold = (bitField >> 4) & 1
  
  //fixedHeight is only mentioned in binary spec 
  if ((bitField >> 3) & 1)
    info.fixedHeight = 1
  
  info.charset = buf.readUInt8(i+3) || ''
  info.stretchH = buf.readUInt16LE(i+4)
  info.aa = buf.readUInt8(i+6)
  info.padding = [
    buf.readInt8(i+7),
    buf.readInt8(i+8),
    buf.readInt8(i+9),
    buf.readInt8(i+10)
  ]
  info.spacing = [
    buf.readInt8(i+11),
    buf.readInt8(i+12)
  ]
  info.outline = buf.readUInt8(i+13)
  info.face = readStringNT(buf, i+14)
  return info
}

function readCommon(buf, i) {
  var common = {}
  common.lineHeight = buf.readUInt16LE(i)
  common.base = buf.readUInt16LE(i+2)
  common.scaleW = buf.readUInt16LE(i+4)
  common.scaleH = buf.readUInt16LE(i+6)
  common.pages = buf.readUInt16LE(i+8)
  var bitField = buf.readUInt8(i+10)
  common.packed = 0
  common.alphaChnl = buf.readUInt8(i+11)
  common.redChnl = buf.readUInt8(i+12)
  common.greenChnl = buf.readUInt8(i+13)
  common.blueChnl = buf.readUInt8(i+14)
  return common
}

function readPages(buf, i, size) {
  var pages = []
  var text = readNameNT(buf, i)
  var len = text.length+1
  var count = size / len
  for (var c=0; c<count; c++) {
    pages[c] = buf.slice(i, i+text.length).toString('utf8')
    i += len
  }
  return pages
}

function readChars(buf, i, blockSize) {
  var chars = []

  var count = blockSize / 20
  for (var c=0; c<count; c++) {
    var char = {}
    var off = c*20
    char.id = buf.readUInt32LE(i + 0 + off)
    char.x = buf.readUInt16LE(i + 4 + off)
    char.y = buf.readUInt16LE(i + 6 + off)
    char.width = buf.readUInt16LE(i + 8 + off)
    char.height = buf.readUInt16LE(i + 10 + off)
    char.xoffset = buf.readInt16LE(i + 12 + off)
    char.yoffset = buf.readInt16LE(i + 14 + off)
    char.xadvance = buf.readInt16LE(i + 16 + off)
    char.page = buf.readUInt8(i + 18 + off)
    char.chnl = buf.readUInt8(i + 19 + off)
    chars[c] = char
  }
  return chars
}

function readKernings(buf, i, blockSize) {
  var kernings = []
  var count = blockSize / 10
  for (var c=0; c<count; c++) {
    var kern = {}
    var off = c*10
    kern.first = buf.readUInt32LE(i + 0 + off)
    kern.second = buf.readUInt32LE(i + 4 + off)
    kern.amount = buf.readInt16LE(i + 8 + off)
    kernings[c] = kern
  }
  return kernings
}

function readNameNT(buf, offset) {
  var pos=offset
  for (; pos<buf.length; pos++) {
    if (buf[pos] === 0x00) 
      break
  }
  return buf.slice(offset, pos)
}

function readStringNT(buf, offset) {
  return readNameNT(buf, offset).toString('utf8')
}
},{}],30:[function(_dereq_,module,exports){
var parseAttributes = _dereq_('./parse-attribs')
var parseFromString = _dereq_('xml-parse-from-string')

//In some cases element.attribute.nodeName can return
//all lowercase values.. so we need to map them to the correct 
//case
var NAME_MAP = {
  scaleh: 'scaleH',
  scalew: 'scaleW',
  stretchh: 'stretchH',
  lineheight: 'lineHeight',
  alphachnl: 'alphaChnl',
  redchnl: 'redChnl',
  greenchnl: 'greenChnl',
  bluechnl: 'blueChnl'
}

module.exports = function parse(data) {
  data = data.toString()
  
  var xmlRoot = parseFromString(data)
  var output = {
    pages: [],
    chars: [],
    kernings: []
  }

  //get config settings
  ;['info', 'common'].forEach(function(key) {
    var element = xmlRoot.getElementsByTagName(key)[0]
    if (element)
      output[key] = parseAttributes(getAttribs(element))
  })

  //get page info
  var pageRoot = xmlRoot.getElementsByTagName('pages')[0]
  if (!pageRoot)
    throw new Error('malformed file -- no <pages> element')
  var pages = pageRoot.getElementsByTagName('page')
  for (var i=0; i<pages.length; i++) {
    var p = pages[i]
    var id = parseInt(p.getAttribute('id'), 10)
    var file = p.getAttribute('file')
    if (isNaN(id))
      throw new Error('malformed file -- page "id" attribute is NaN')
    if (!file)
      throw new Error('malformed file -- needs page "file" attribute')
    output.pages[parseInt(id, 10)] = file
  }

  //get kernings / chars
  ;['chars', 'kernings'].forEach(function(key) {
    var element = xmlRoot.getElementsByTagName(key)[0]
    if (!element)
      return
    var childTag = key.substring(0, key.length-1)
    var children = element.getElementsByTagName(childTag)
    for (var i=0; i<children.length; i++) {      
      var child = children[i]
      output[key].push(parseAttributes(getAttribs(child)))
    }
  })
  return output
}

function getAttribs(element) {
  var attribs = getAttribList(element)
  return attribs.reduce(function(dict, attrib) {
    var key = mapName(attrib.nodeName)
    dict[key] = attrib.nodeValue
    return dict
  }, {})
}

function getAttribList(element) {
  //IE8+ and modern browsers
  var attribs = []
  for (var i=0; i<element.attributes.length; i++)
    attribs.push(element.attributes[i])
  return attribs
}

function mapName(nodeName) {
  return NAME_MAP[nodeName.toLowerCase()] || nodeName
}
},{"./parse-attribs":31,"xml-parse-from-string":53}],31:[function(_dereq_,module,exports){
//Some versions of GlyphDesigner have a typo
//that causes some bugs with parsing. 
//Need to confirm with recent version of the software
//to see whether this is still an issue or not.
var GLYPH_DESIGNER_ERROR = 'chasrset'

module.exports = function parseAttributes(obj) {
  if (GLYPH_DESIGNER_ERROR in obj) {
    obj['charset'] = obj[GLYPH_DESIGNER_ERROR]
    delete obj[GLYPH_DESIGNER_ERROR]
  }

  for (var k in obj) {
    if (k === 'face' || k === 'charset') 
      continue
    else if (k === 'padding' || k === 'spacing')
      obj[k] = parseIntList(obj[k])
    else
      obj[k] = parseInt(obj[k], 10) 
  }
  return obj
}

function parseIntList(data) {
  return data.split(',').map(function(val) {
    return parseInt(val, 10)
  })
}
},{}],32:[function(_dereq_,module,exports){
var trim = _dereq_('trim')
  , forEach = _dereq_('for-each')
  , isArray = function(arg) {
      return Object.prototype.toString.call(arg) === '[object Array]';
    }

module.exports = function (headers) {
  if (!headers)
    return {}

  var result = {}

  forEach(
      trim(headers).split('\n')
    , function (row) {
        var index = row.indexOf(':')
          , key = trim(row.slice(0, index)).toLowerCase()
          , value = trim(row.slice(index + 1))

        if (typeof(result[key]) === 'undefined') {
          result[key] = value
        } else if (isArray(result[key])) {
          result[key].push(value)
        } else {
          result[key] = [ result[key], value ]
        }
      }
  )

  return result
}
},{"for-each":16,"trim":49}],33:[function(_dereq_,module,exports){
(function (global){
var performance = global.performance || {};

var present = (function () {
  var names = ['now', 'webkitNow', 'msNow', 'mozNow', 'oNow'];
  while (names.length) {
    var name = names.shift();
    if (name in performance) {
      return performance[name].bind(performance);
    }
  }

  var dateNow = Date.now || function () { return new Date().getTime(); };
  var navigationStart = (performance.timing || {}).navigationStart || dateNow();
  return function () {
    return dateNow() - navigationStart;
  };
}());

present.performanceNow = performance.now;
present.noConflict = function () {
  performance.now = present.performanceNow;
};
present.conflict = function () {
  performance.now = present;
};
present.conflict();

module.exports = present;

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{}],34:[function(_dereq_,module,exports){
(function (setImmediate){
(function(root) {

	// Store setTimeout reference so promise-polyfill will be unaffected by
	// other code modifying setTimeout (like sinon.useFakeTimers())
	var setTimeoutFunc = setTimeout;

	// Use polyfill for setImmediate for performance gains
	var asap = (typeof setImmediate === 'function' && setImmediate) ||
		function(fn) { setTimeoutFunc(fn, 1); };

	// Polyfill for Function.prototype.bind
	function bind(fn, thisArg) {
		return function() {
			fn.apply(thisArg, arguments);
		}
	}

	var isArray = Array.isArray || function(value) { return Object.prototype.toString.call(value) === "[object Array]" };

	function Promise(fn) {
		if (typeof this !== 'object') throw new TypeError('Promises must be constructed via new');
		if (typeof fn !== 'function') throw new TypeError('not a function');
		this._state = null;
		this._value = null;
		this._deferreds = []

		doResolve(fn, bind(resolve, this), bind(reject, this))
	}

	function handle(deferred) {
		var me = this;
		if (this._state === null) {
			this._deferreds.push(deferred);
			return
		}
		asap(function() {
			var cb = me._state ? deferred.onFulfilled : deferred.onRejected
			if (cb === null) {
				(me._state ? deferred.resolve : deferred.reject)(me._value);
				return;
			}
			var ret;
			try {
				ret = cb(me._value);
			}
			catch (e) {
				deferred.reject(e);
				return;
			}
			deferred.resolve(ret);
		})
	}

	function resolve(newValue) {
		try { //Promise Resolution Procedure: https://github.com/promises-aplus/promises-spec#the-promise-resolution-procedure
			if (newValue === this) throw new TypeError('A promise cannot be resolved with itself.');
			if (newValue && (typeof newValue === 'object' || typeof newValue === 'function')) {
				var then = newValue.then;
				if (typeof then === 'function') {
					doResolve(bind(then, newValue), bind(resolve, this), bind(reject, this));
					return;
				}
			}
			this._state = true;
			this._value = newValue;
			finale.call(this);
		} catch (e) { reject.call(this, e); }
	}

	function reject(newValue) {
		this._state = false;
		this._value = newValue;
		finale.call(this);
	}

	function finale() {
		for (var i = 0, len = this._deferreds.length; i < len; i++) {
			handle.call(this, this._deferreds[i]);
		}
		this._deferreds = null;
	}

	function Handler(onFulfilled, onRejected, resolve, reject){
		this.onFulfilled = typeof onFulfilled === 'function' ? onFulfilled : null;
		this.onRejected = typeof onRejected === 'function' ? onRejected : null;
		this.resolve = resolve;
		this.reject = reject;
	}

	/**
	 * Take a potentially misbehaving resolver function and make sure
	 * onFulfilled and onRejected are only called once.
	 *
	 * Makes no guarantees about asynchrony.
	 */
	function doResolve(fn, onFulfilled, onRejected) {
		var done = false;
		try {
			fn(function (value) {
				if (done) return;
				done = true;
				onFulfilled(value);
			}, function (reason) {
				if (done) return;
				done = true;
				onRejected(reason);
			})
		} catch (ex) {
			if (done) return;
			done = true;
			onRejected(ex);
		}
	}

	Promise.prototype['catch'] = function (onRejected) {
		return this.then(null, onRejected);
	};

	Promise.prototype.then = function(onFulfilled, onRejected) {
		var me = this;
		return new Promise(function(resolve, reject) {
			handle.call(me, new Handler(onFulfilled, onRejected, resolve, reject));
		})
	};

	Promise.all = function () {
		var args = Array.prototype.slice.call(arguments.length === 1 && isArray(arguments[0]) ? arguments[0] : arguments);

		return new Promise(function (resolve, reject) {
			if (args.length === 0) return resolve([]);
			var remaining = args.length;
			function res(i, val) {
				try {
					if (val && (typeof val === 'object' || typeof val === 'function')) {
						var then = val.then;
						if (typeof then === 'function') {
							then.call(val, function (val) { res(i, val) }, reject);
							return;
						}
					}
					args[i] = val;
					if (--remaining === 0) {
						resolve(args);
					}
				} catch (ex) {
					reject(ex);
				}
			}
			for (var i = 0; i < args.length; i++) {
				res(i, args[i]);
			}
		});
	};

	Promise.resolve = function (value) {
		if (value && typeof value === 'object' && value.constructor === Promise) {
			return value;
		}

		return new Promise(function (resolve) {
			resolve(value);
		});
	};

	Promise.reject = function (value) {
		return new Promise(function (resolve, reject) {
			reject(value);
		});
	};

	Promise.race = function (values) {
		return new Promise(function (resolve, reject) {
			for(var i = 0, len = values.length; i < len; i++) {
				values[i].then(resolve, reject);
			}
		});
	};

	/**
	 * Set the immediate function to execute callbacks
	 * @param fn {function} Function to execute
	 * @private
	 */
	Promise._setImmediateFn = function _setImmediateFn(fn) {
		asap = fn;
	};

	if (typeof module !== 'undefined' && module.exports) {
		module.exports = Promise;
	} else if (!root.Promise) {
		root.Promise = Promise;
	}

})(this);

}).call(this,_dereq_("timers").setImmediate)

},{"timers":47}],35:[function(_dereq_,module,exports){
var dtype = _dereq_('dtype')
var anArray = _dereq_('an-array')
var isBuffer = _dereq_('is-buffer')

var CW = [0, 2, 3]
var CCW = [2, 1, 3]

module.exports = function createQuadElements(array, opt) {
    //if user didn't specify an output array
    if (!array || !(anArray(array) || isBuffer(array))) {
        opt = array || {}
        array = null
    }

    if (typeof opt === 'number') //backwards-compatible
        opt = { count: opt }
    else
        opt = opt || {}

    var type = typeof opt.type === 'string' ? opt.type : 'uint16'
    var count = typeof opt.count === 'number' ? opt.count : 1
    var start = (opt.start || 0) 

    var dir = opt.clockwise !== false ? CW : CCW,
        a = dir[0], 
        b = dir[1],
        c = dir[2]

    var numIndices = count * 6

    var indices = array || new (dtype(type))(numIndices)
    for (var i = 0, j = 0; i < numIndices; i += 6, j += 4) {
        var x = i + start
        indices[x + 0] = j + 0
        indices[x + 1] = j + 1
        indices[x + 2] = j + 2
        indices[x + 3] = j + a
        indices[x + 4] = j + b
        indices[x + 5] = j + c
    }
    return indices
}
},{"an-array":1,"dtype":14,"is-buffer":20}],36:[function(_dereq_,module,exports){
/*
 * anime.js v3.0.0
 * (c) 2019 Julian Garnier
 * Released under the MIT license
 * animejs.com
 */

'use strict';

// Defaults

var defaultInstanceSettings = {
  update: null,
  begin: null,
  loopBegin: null,
  changeBegin: null,
  change: null,
  changeComplete: null,
  loopComplete: null,
  complete: null,
  loop: 1,
  direction: 'normal',
  autoplay: true,
  timelineOffset: 0
};

var defaultTweenSettings = {
  duration: 1000,
  delay: 0,
  endDelay: 0,
  easing: 'easeOutElastic(1, .5)',
  round: 0
};

var validTransforms = ['translateX', 'translateY', 'translateZ', 'rotate', 'rotateX', 'rotateY', 'rotateZ', 'scale', 'scaleX', 'scaleY', 'scaleZ', 'skew', 'skewX', 'skewY', 'perspective'];

// Caching

var cache = {
  CSS: {},
  springs: {}
};

// Utils

function minMax(val, min, max) {
  return Math.min(Math.max(val, min), max);
}

function stringContains(str, text) {
  return str.indexOf(text) > -1;
}

function applyArguments(func, args) {
  return func.apply(null, args);
}

var hexRegex = /(^#[0-9A-F]{6}$)|(^#[0-9A-F]{3}$)/i;
var rgbPrefixRegex = /^rgb/;
var hslRegex = /^hsl/;

var is = {
  arr: function (a) { return Array.isArray(a); },
  obj: function (a) { return stringContains(Object.prototype.toString.call(a), 'Object'); },
  pth: function (a) { return is.obj(a) && a.hasOwnProperty('totalLength'); },
  svg: function (a) { return a instanceof SVGElement; },
  inp: function (a) { return a instanceof HTMLInputElement; },
  dom: function (a) { return a.nodeType || is.svg(a); },
  str: function (a) { return typeof a === 'string'; },
  fnc: function (a) { return typeof a === 'function'; },
  und: function (a) { return typeof a === 'undefined'; },
  hex: function (a) { return hexRegex.test(a); },
  rgb: function (a) { return rgbPrefixRegex.test(a); },
  hsl: function (a) { return hslRegex.test(a); },
  col: function (a) { return (is.hex(a) || is.rgb(a) || is.hsl(a)); },
  key: function (a) { return !defaultInstanceSettings.hasOwnProperty(a) && !defaultTweenSettings.hasOwnProperty(a) && a !== 'targets' && a !== 'keyframes'; }
};

// Easings

var easingFunctionRegex = /\(([^)]+)\)/;

function parseEasingParameters(string) {
  var match = easingFunctionRegex.exec(string);
  return match ? match[1].split(',').map(function (p) { return parseFloat(p); }) : [];
}

// Spring solver inspired by Webkit Copyright © 2016 Apple Inc. All rights reserved. https://webkit.org/demos/spring/spring.js

function spring(string, duration) {

  var params = parseEasingParameters(string);
  var mass = minMax(is.und(params[0]) ? 1 : params[0], .1, 100);
  var stiffness = minMax(is.und(params[1]) ? 100 : params[1], .1, 100);
  var damping = minMax(is.und(params[2]) ? 10 : params[2], .1, 100);
  var velocity =  minMax(is.und(params[3]) ? 0 : params[3], .1, 100);
  var w0 = Math.sqrt(stiffness / mass);
  var zeta = damping / (2 * Math.sqrt(stiffness * mass));
  var wd = zeta < 1 ? w0 * Math.sqrt(1 - zeta * zeta) : 0;
  var a = 1;
  var b = zeta < 1 ? (zeta * w0 + -velocity) / wd : -velocity + w0;

  function solver(t) {
    var progress = duration ? (duration * t) / 1000 : t;
    if (zeta < 1) {
      progress = Math.exp(-progress * zeta * w0) * (a * Math.cos(wd * progress) + b * Math.sin(wd * progress));
    } else {
      progress = (a + b * progress) * Math.exp(-progress * w0);
    }
    if (t === 0 || t === 1) { return t; }
    return 1 - progress;
  }

  function getDuration() {
    var cached = cache.springs[string];
    if (cached) { return cached; }
    var frame = 1/6;
    var elapsed = 0;
    var rest = 0;
    while(true) {
      elapsed += frame;
      if (solver(elapsed) === 1) {
        rest++;
        if (rest >= 16) { break; }
      } else {
        rest = 0;
      }
    }
    var duration = elapsed * frame * 1000;
    cache.springs[string] = duration;
    return duration;
  }

  return duration ? solver : getDuration;

}

// Elastic easing adapted from jQueryUI http://api.jqueryui.com/easings/

function elastic(amplitude, period) {
  if ( amplitude === void 0 ) amplitude = 1;
  if ( period === void 0 ) period = .5;

  var a = minMax(amplitude, 1, 10);
  var p = minMax(period, .1, 2);
  return function (t) {
    return (t === 0 || t === 1) ? t :
      -a * Math.pow(2, 10 * (t - 1)) * Math.sin((((t - 1) - (p / (Math.PI * 2) * Math.asin(1 / a))) * (Math.PI * 2)) / p);
  }
}

// Basic steps easing implementation https://developer.mozilla.org/fr/docs/Web/CSS/transition-timing-function

function steps(steps) {
  if ( steps === void 0 ) steps = 10;

  return function (t) { return Math.round(t * steps) * (1 / steps); };
}

// BezierEasing https://github.com/gre/bezier-easing

var bezier = (function () {

  var kSplineTableSize = 11;
  var kSampleStepSize = 1.0 / (kSplineTableSize - 1.0);

  function A(aA1, aA2) { return 1.0 - 3.0 * aA2 + 3.0 * aA1 }
  function B(aA1, aA2) { return 3.0 * aA2 - 6.0 * aA1 }
  function C(aA1)      { return 3.0 * aA1 }

  function calcBezier(aT, aA1, aA2) { return ((A(aA1, aA2) * aT + B(aA1, aA2)) * aT + C(aA1)) * aT }
  function getSlope(aT, aA1, aA2) { return 3.0 * A(aA1, aA2) * aT * aT + 2.0 * B(aA1, aA2) * aT + C(aA1) }

  function binarySubdivide(aX, aA, aB, mX1, mX2) {
    var currentX, currentT, i = 0;
    do {
      currentT = aA + (aB - aA) / 2.0;
      currentX = calcBezier(currentT, mX1, mX2) - aX;
      if (currentX > 0.0) { aB = currentT; } else { aA = currentT; }
    } while (Math.abs(currentX) > 0.0000001 && ++i < 10);
    return currentT;
  }

  function newtonRaphsonIterate(aX, aGuessT, mX1, mX2) {
    for (var i = 0; i < 4; ++i) {
      var currentSlope = getSlope(aGuessT, mX1, mX2);
      if (currentSlope === 0.0) { return aGuessT; }
      var currentX = calcBezier(aGuessT, mX1, mX2) - aX;
      aGuessT -= currentX / currentSlope;
    }
    return aGuessT;
  }

  function bezier(mX1, mY1, mX2, mY2) {

    if (!(0 <= mX1 && mX1 <= 1 && 0 <= mX2 && mX2 <= 1)) { return; }
    var sampleValues = new Float32Array(kSplineTableSize);

    if (mX1 !== mY1 || mX2 !== mY2) {
      for (var i = 0; i < kSplineTableSize; ++i) {
        sampleValues[i] = calcBezier(i * kSampleStepSize, mX1, mX2);
      }
    }

    function getTForX(aX) {

      var intervalStart = 0;
      var currentSample = 1;
      var lastSample = kSplineTableSize - 1;

      for (; currentSample !== lastSample && sampleValues[currentSample] <= aX; ++currentSample) {
        intervalStart += kSampleStepSize;
      }

      --currentSample;

      var dist = (aX - sampleValues[currentSample]) / (sampleValues[currentSample + 1] - sampleValues[currentSample]);
      var guessForT = intervalStart + dist * kSampleStepSize;
      var initialSlope = getSlope(guessForT, mX1, mX2);

      if (initialSlope >= 0.001) {
        return newtonRaphsonIterate(aX, guessForT, mX1, mX2);
      } else if (initialSlope === 0.0) {
        return guessForT;
      } else {
        return binarySubdivide(aX, intervalStart, intervalStart + kSampleStepSize, mX1, mX2);
      }

    }

    return function (x) {
      if (mX1 === mY1 && mX2 === mY2) { return x; }
      if (x === 0 || x === 1) { return x; }
      return calcBezier(getTForX(x), mY1, mY2);
    }

  }

  return bezier;

})();

var penner = (function () {

  var names = ['Quad', 'Cubic', 'Quart', 'Quint', 'Sine', 'Expo', 'Circ', 'Back', 'Elastic'];

  // Approximated Penner equations http://matthewlein.com/ceaser/

  var curves = {
    In: [
      [0.550, 0.085, 0.680, 0.530], /* inQuad */
      [0.550, 0.055, 0.675, 0.190], /* inCubic */
      [0.895, 0.030, 0.685, 0.220], /* inQuart */
      [0.755, 0.050, 0.855, 0.060], /* inQuint */
      [0.470, 0.000, 0.745, 0.715], /* inSine */
      [0.950, 0.050, 0.795, 0.035], /* inExpo */
      [0.600, 0.040, 0.980, 0.335], /* inCirc */
      [0.600,-0.280, 0.735, 0.045], /* inBack */
      elastic /* inElastic */
    ],
    Out: [
      [0.250, 0.460, 0.450, 0.940], /* outQuad */
      [0.215, 0.610, 0.355, 1.000], /* outCubic */
      [0.165, 0.840, 0.440, 1.000], /* outQuart */
      [0.230, 1.000, 0.320, 1.000], /* outQuint */
      [0.390, 0.575, 0.565, 1.000], /* outSine */
      [0.190, 1.000, 0.220, 1.000], /* outExpo */
      [0.075, 0.820, 0.165, 1.000], /* outCirc */
      [0.175, 0.885, 0.320, 1.275], /* outBack */
      function (a, p) { return function (t) { return 1 - elastic(a, p)(1 - t); }; } /* outElastic */
    ],
    InOut: [
      [0.455, 0.030, 0.515, 0.955], /* inOutQuad */
      [0.645, 0.045, 0.355, 1.000], /* inOutCubic */
      [0.770, 0.000, 0.175, 1.000], /* inOutQuart */
      [0.860, 0.000, 0.070, 1.000], /* inOutQuint */
      [0.445, 0.050, 0.550, 0.950], /* inOutSine */
      [1.000, 0.000, 0.000, 1.000], /* inOutExpo */
      [0.785, 0.135, 0.150, 0.860], /* inOutCirc */
      [0.680,-0.550, 0.265, 1.550], /* inOutBack */
      function (a, p) { return function (t) { return t < .5 ? elastic(a, p)(t * 2) / 2 : 1 - elastic(a, p)(t * -2 + 2) / 2; }; } /* inOutElastic */
    ]
  };

  var eases = {
    linear: [0.250, 0.250, 0.750, 0.750]
  };

  for (var coords in curves) {
    for (var i = 0, len = curves[coords].length; i < len; i++) {
      eases['ease'+coords+names[i]] = curves[coords][i];
    }
  }

  return eases;

})();

function parseEasings(easing, duration) {
  if (is.fnc(easing)) { return easing; }
  var name = easing.split('(')[0];
  var ease = penner[name];
  var args = parseEasingParameters(easing);
  switch (name) {
    case 'spring' : return spring(easing, duration);
    case 'cubicBezier' : return applyArguments(bezier, args);
    case 'steps' : return applyArguments(steps, args);
    default : return is.fnc(ease) ? applyArguments(ease, args) : applyArguments(bezier, ease);
  }
}

// Strings

function selectString(str) {
  try {
    var nodes = document.querySelectorAll(str);
    return nodes;
  } catch(e) {
    return;
  }
}

// Arrays

var auxArrayFilter = [];

function filterArray(arr, callback) {
  var result = auxArrayFilter;

  var len = arr.length;
  var thisArg = arguments.length >= 2 ? arguments[1] : void 0;
  for (var i = 0; i < len; i++) {
    if (i in arr) {
      var val = arr[i];
      if (callback.call(thisArg, val, i, arr)) {
        result.push(val);
      }
    }
  }

  // arr turns into the auxArray and we return the previously aux array.
  auxArrayFilter = arr;
  auxArrayFilter.length = 0;
  return result;
}

function flattenArray (arr, result) {
  if (!result) { result = []; }
  for (var i = 0, length = arr.length; i < length; i++) {
    var value = arr[i];
    if (Array.isArray(value)) {
      flattenArray(value, result);
    } else {
      result.push(value);
    }
  }
  return result;
}

function toArray(o) {
  if (is.arr(o)) { return o; }
  if (is.str(o)) { o = selectString(o) || o; }
  if (o instanceof NodeList || o instanceof HTMLCollection) { return [].slice.call(o); }
  return [o];
}

function arrayContains(arr, val) {
  return arr.some(function (a) { return a === val; });
}

// Objects

function cloneObject(o) {
  var clone = {};
  for (var p in o) { clone[p] = o[p]; }
  return clone;
}

function replaceObjectProps(o1, o2) {
  var o = cloneObject(o1);
  for (var p in o1) { o[p] = o2.hasOwnProperty(p) ? o2[p] : o1[p]; }
  return o;
}

function mergeObjects(o1, o2) {
  var o = cloneObject(o1);
  for (var p in o2) { o[p] = is.und(o1[p]) ? o2[p] : o1[p]; }
  return o;
}

// Colors

var rgbRegex = /rgb\((\d+,\s*[\d]+,\s*[\d]+)\)/g;

function rgbToRgba(rgbValue) {
  var rgb = rgbRegex.exec(rgbValue);
  return rgb ? ("rgba(" + (rgb[1]) + ",1)") : rgbValue;
}

var hexToRgbaHexRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
var hexToRgbaRgbRegex = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i;

function hexToRgba(hexValue) {
  var hex = hexValue.replace(hexToRgbaHexRegex, function (m, r, g, b) { return r + r + g + g + b + b; } );
  var rgb = hexToRgbaRgbRegex.exec(hex);
  var r = parseInt(rgb[1], 16);
  var g = parseInt(rgb[2], 16);
  var b = parseInt(rgb[3], 16);
  return ("rgba(" + r + "," + g + "," + b + ",1)");
}

var hslToRgbaHsl1Regex = /hsl\((\d+),\s*([\d.]+)%,\s*([\d.]+)%\)/g;
var hslToRgbaHsl2Regex = /hsla\((\d+),\s*([\d.]+)%,\s*([\d.]+)%,\s*([\d.]+)\)/g;

function hslToRgba(hslValue) {
  var hsl = hslToRgbaHsl1Regex.exec(hslValue) || hslToRgbaHsl2Regex.exec(hslValue);
  var h = parseInt(hsl[1], 10) / 360;
  var s = parseInt(hsl[2], 10) / 100;
  var l = parseInt(hsl[3], 10) / 100;
  var a = hsl[4] || 1;
  function hue2rgb(p, q, t) {
    if (t < 0) { t += 1; }
    if (t > 1) { t -= 1; }
    if (t < 1/6) { return p + (q - p) * 6 * t; }
    if (t < 1/2) { return q; }
    if (t < 2/3) { return p + (q - p) * (2/3 - t) * 6; }
    return p;
  }
  var r, g, b;
  if (s == 0) {
    r = g = b = l;
  } else {
    var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
    var p = 2 * l - q;
    r = hue2rgb(p, q, h + 1/3);
    g = hue2rgb(p, q, h);
    b = hue2rgb(p, q, h - 1/3);
  }
  return ("rgba(" + (r * 255) + "," + (g * 255) + "," + (b * 255) + "," + a + ")");
}

function colorToRgb(val) {
  if (is.rgb(val)) { return rgbToRgba(val); }
  if (is.hex(val)) { return hexToRgba(val); }
  if (is.hsl(val)) { return hslToRgba(val); }
}

// Units

var unitRegex = /([\+\-]?[0-9#\.]+)(%|px|pt|em|rem|in|cm|mm|ex|ch|pc|vw|vh|vmin|vmax|deg|rad|turn)?$/;

function getUnit(val) {
  var split = unitRegex.exec(val);
  if (split) { return split[2]; }
}

function getTransformUnit(propName) {
  if (stringContains(propName, 'translate') || propName === 'perspective') { return 'px'; }
  if (stringContains(propName, 'rotate') || stringContains(propName, 'skew')) { return 'deg'; }
}

// Values

function getFunctionValue(val, animatable) {
  if (!is.fnc(val)) { return val; }
  return val(animatable.target, animatable.id, animatable.total);
}

function getAttribute(el, prop) {
  return el.getAttribute(prop);
}

function convertPxToUnit(el, value, unit) {
  var valueUnit = getUnit(value);
  if (arrayContains([unit, 'deg', 'rad', 'turn'], valueUnit)) { return value; }
  var cached = cache.CSS[value + unit];
  if (!is.und(cached)) { return cached; }
  var baseline = 100;
  var tempEl = document.createElement(el.tagName);
  var parentEl = (el.parentNode && (el.parentNode !== document)) ? el.parentNode : document.body;
  parentEl.appendChild(tempEl);
  tempEl.style.position = 'absolute';
  tempEl.style.width = baseline + unit;
  var factor = baseline / tempEl.offsetWidth;
  parentEl.removeChild(tempEl);
  var convertedUnit = factor * parseFloat(value);
  cache.CSS[value + unit] = convertedUnit;
  return convertedUnit;
}

function getCSSValue(el, prop, unit) {
  if (prop in el.style) {
    var uppercasePropName = prop.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();
    var value = el.style[prop] || getComputedStyle(el).getPropertyValue(uppercasePropName) || '0';
    return unit ? convertPxToUnit(el, value, unit) : value;
  }
}

function getAnimationType(el, prop) {
  if (is.dom(el) && !is.inp(el) && (getAttribute(el, prop) || (is.svg(el) && el[prop]))) { return 'attribute'; }
  if (is.dom(el) && arrayContains(validTransforms, prop)) { return 'transform'; }
  if (is.dom(el) && (prop !== 'transform' && getCSSValue(el, prop))) { return 'css'; }
  if (el[prop] != null) { return 'object'; }
}

var transformRegex = /(\w+)\(([^)]*)\)/g;

function getElementTransforms(el) {
  if (!is.dom(el)) { return; }
  var str = el.style.transform || '';
  var transforms = new Map();
  var m; while (m = transformRegex.exec(str)) { transforms.set(m[1], m[2]); }
  return transforms;
}

function getTransformValue(el, propName, animatable, unit) {
  var defaultVal = stringContains(propName, 'scale') ? 1 : 0 + getTransformUnit(propName);
  var value = getElementTransforms(el).get(propName) || defaultVal;
  if (animatable) {
    animatable.transforms.list.set(propName, value);
    animatable.transforms['last'] = propName;
  }
  return unit ? convertPxToUnit(el, value, unit) : value;
}

function getOriginalTargetValue(target, propName, unit, animatable) {
  switch (getAnimationType(target, propName)) {
    case 'transform': return getTransformValue(target, propName, animatable, unit);
    case 'css': return getCSSValue(target, propName, unit);
    case 'attribute': return getAttribute(target, propName);
    default: return target[propName] || 0;
  }
}

var operatorRegex = /^(\*=|\+=|-=)/;

function getRelativeValue(to, from) {
  var operator = operatorRegex.exec(to);
  if (!operator) { return to; }
  var u = getUnit(to) || 0;
  var x = parseFloat(from);
  var y = parseFloat(to.replace(operator[0], ''));
  switch (operator[0][0]) {
    case '+': return x + y + u;
    case '-': return x - y + u;
    case '*': return x * y + u;
  }
}

var whitespaceRegex = /\s/g;

function validateValue(val, unit) {
  if (is.col(val)) { return colorToRgb(val); }
  var originalUnit = getUnit(val);
  var unitLess = originalUnit ? val.substr(0, val.length - originalUnit.length) : val;
  return unit && !whitespaceRegex.test(val) ? unitLess + unit : unitLess;
}

// getTotalLength() equivalent for circle, rect, polyline, polygon and line shapes
// adapted from https://gist.github.com/SebLambla/3e0550c496c236709744

function getDistance(p1, p2) {
  return Math.sqrt(Math.pow(p2.x - p1.x, 2) + Math.pow(p2.y - p1.y, 2));
}

function getCircleLength(el) {
  return Math.PI * 2 * getAttribute(el, 'r');
}

function getRectLength(el) {
  return (getAttribute(el, 'width') * 2) + (getAttribute(el, 'height') * 2);
}

function getLineLength(el) {
  return getDistance(
    {x: getAttribute(el, 'x1'), y: getAttribute(el, 'y1')},
    {x: getAttribute(el, 'x2'), y: getAttribute(el, 'y2')}
  );
}

function getPolylineLength(el) {
  var points = el.points;
  var totalLength = 0;
  var previousPos;
  for (var i = 0 ; i < points.numberOfItems; i++) {
    var currentPos = points.getItem(i);
    if (i > 0) { totalLength += getDistance(previousPos, currentPos); }
    previousPos = currentPos;
  }
  return totalLength;
}

function getPolygonLength(el) {
  var points = el.points;
  return getPolylineLength(el) + getDistance(points.getItem(points.numberOfItems - 1), points.getItem(0));
}

// Path animation

function getTotalLength(el) {
  if (el.getTotalLength) { return el.getTotalLength(); }
  switch(el.tagName.toLowerCase()) {
    case 'circle': return getCircleLength(el);
    case 'rect': return getRectLength(el);
    case 'line': return getLineLength(el);
    case 'polyline': return getPolylineLength(el);
    case 'polygon': return getPolygonLength(el);
  }
}

function setDashoffset(el) {
  var pathLength = getTotalLength(el);
  el.setAttribute('stroke-dasharray', pathLength);
  return pathLength;
}

// Motion path

function getParentSvgEl(el) {
  var parentEl = el.parentNode;
  while (is.svg(parentEl)) {
    parentEl = parentEl.parentNode;
    if (!is.svg(parentEl.parentNode)) { break; }
  }
  return parentEl;
}

function getParentSvg(pathEl, svgData) {
  var svg = svgData || {};
  var parentSvgEl = svg.el || getParentSvgEl(pathEl);
  var rect = parentSvgEl.getBoundingClientRect();
  var viewBoxAttr = getAttribute(parentSvgEl, 'viewBox');
  var width = rect.width;
  var height = rect.height;
  var viewBox = svg.viewBox || (viewBoxAttr ? viewBoxAttr.split(' ') : [0, 0, width, height]);
  return {
    el: parentSvgEl,
    viewBox: viewBox,
    x: viewBox[0] / 1,
    y: viewBox[1] / 1,
    w: width / viewBox[2],
    h: height / viewBox[3]
  }
}

function getPath(path, percent) {
  var pathEl = is.str(path) ? selectString(path)[0] : path;
  var p = percent || 100;
  return function(property) {
    return {
      property: property,
      el: pathEl,
      svg: getParentSvg(pathEl),
      totalLength: getTotalLength(pathEl) * (p / 100)
    }
  }
}

function getPathProgress(path, progress) {
  function point(offset) {
    if ( offset === void 0 ) offset = 0;

    var l = progress + offset >= 1 ? progress + offset : 0;
    return path.el.getPointAtLength(l);
  }
  var svg = getParentSvg(path.el, path.svg);
  var p = point();
  var p0 = point(-1);
  var p1 = point(+1);
  switch (path.property) {
    case 'x': return (p.x - svg.x) * svg.w;
    case 'y': return (p.y - svg.y) * svg.h;
    case 'angle': return Math.atan2(p1.y - p0.y, p1.x - p0.x) * 180 / Math.PI;
  }
}

// Decompose value

var valueRegex = /-?\d*\.?\d+/g;

function decomposeValue(val, unit) {
  var value = validateValue((is.pth(val) ? val.totalLength : val), unit) + '';
  return {
    original: value,
    numbers: value.match(valueRegex) ? value.match(valueRegex).map(Number) : [0],
    strings: (is.str(val) || unit) ? value.split(valueRegex) : []
  }
}

// Animatables

function parseTargets(targets) {
  var targetsArray = targets ? (flattenArray(is.arr(targets) ? targets.map(toArray) : toArray(targets))) : [];
  return filterArray(targetsArray, function (item, pos, self) { return self.indexOf(item) === pos; });
}

function getAnimatables(targets) {
  var parsed = parseTargets(targets);
  return parsed.map(function (t, i) {
    return {target: t, id: i, total: parsed.length, transforms: { list: getElementTransforms(t) } };
  });
}

// Properties

var springRegex = /^spring/;

function normalizePropertyTweens(prop, tweenSettings) {
  var settings = cloneObject(tweenSettings);
  // Override duration if easing is a spring
  if (springRegex.test(settings.easing)) { settings.duration = spring(settings.easing); }
  if (is.arr(prop)) {
    var l = prop.length;
    var isFromTo = (l === 2 && !is.obj(prop[0]));
    if (!isFromTo) {
      // Duration divided by the number of tweens
      if (!is.fnc(tweenSettings.duration)) { settings.duration = tweenSettings.duration / l; }
    } else {
      // Transform [from, to] values shorthand to a valid tween value
      prop = {value: prop};
    }
  }
  var propArray = is.arr(prop) ? prop : [prop];
  return propArray.map(function (v, i) {
    var obj = (is.obj(v) && !is.pth(v)) ? v : {value: v};
    // Default delay value should only be applied to the first tween
    if (is.und(obj.delay)) { obj.delay = !i ? tweenSettings.delay : 0; }
    // Default endDelay value should only be applied to the last tween
    if (is.und(obj.endDelay)) { obj.endDelay = i === propArray.length - 1 ? tweenSettings.endDelay : 0; }
    return obj;
  }).map(function (k) { return mergeObjects(k, settings); });
}


function flattenKeyframes(keyframes) {
  var propertyNames = filterArray(flattenArray(keyframes.map(function (key) { return Object.keys(key); })), function (p) { return is.key(p); })
  .reduce(function (a,b) { if (a.indexOf(b) < 0) { a.push(b); } return a; }, []);
  var properties = {};
  var loop = function ( i ) {
    var propName = propertyNames[i];
    properties[propName] = keyframes.map(function (key) {
      var newKey = {};
      for (var p in key) {
        if (is.key(p)) {
          if (p == propName) { newKey.value = key[p]; }
        } else {
          newKey[p] = key[p];
        }
      }
      return newKey;
    });
  };

  for (var i = 0; i < propertyNames.length; i++) loop( i );
  return properties;
}

function getProperties(tweenSettings, params) {
  var properties = [];
  var keyframes = params.keyframes;
  if (keyframes) { params = mergeObjects(flattenKeyframes(keyframes), params); }
  for (var p in params) {
    if (is.key(p)) {
      properties.push({
        name: p,
        tweens: normalizePropertyTweens(params[p], tweenSettings)
      });
    }
  }
  return properties;
}

// Tweens

function normalizeTweenValues(tween, animatable) {
  var t = {};
  for (var p in tween) {
    var value = getFunctionValue(tween[p], animatable);
    if (is.arr(value)) {
      value = value.map(function (v) { return getFunctionValue(v, animatable); });
      if (value.length === 1) { value = value[0]; }
    }
    t[p] = value;
  }
  t.duration = parseFloat(t.duration);
  t.delay = parseFloat(t.delay);
  return t;
}

function normalizeTweens(prop, animatable) {
  var previousTween;
  return prop.tweens.map(function (t) {
    var tween = normalizeTweenValues(t, animatable);
    var tweenValue = tween.value;
    var to = is.arr(tweenValue) ? tweenValue[1] : tweenValue;
    var toUnit = getUnit(to);
    var originalValue = getOriginalTargetValue(animatable.target, prop.name, toUnit, animatable);
    var previousValue = previousTween ? previousTween.to.original : originalValue;
    var from = is.arr(tweenValue) ? tweenValue[0] : previousValue;
    var fromUnit = getUnit(from) || getUnit(originalValue);
    var unit = toUnit || fromUnit;
    if (is.und(to)) { to = previousValue; }
    tween.from = decomposeValue(from, unit);
    tween.to = decomposeValue(getRelativeValue(to, from), unit);
    tween.start = previousTween ? previousTween.end : 0;
    tween.end = tween.start + tween.delay + tween.duration + tween.endDelay;
    tween.easing = parseEasings(tween.easing, tween.duration);
    tween.isPath = is.pth(tweenValue);
    tween.isColor = is.col(tween.from.original);
    if (tween.isColor) { tween.round = 1; }
    previousTween = tween;
    return tween;
  });
}

// Tween progress

var setProgressValue = {
  css: function (t, p, v) { return t.style[p] = v; },
  attribute: function (t, p, v) { return t.setAttribute(p, v); },
  object: function (t, p, v) { return t[p] = v; },
  transform: function (t, p, v, transforms, manual) {
    transforms.list.set(p, v);
    if (p === transforms.last || manual) {
      var str = '';
      transforms.list.forEach(function (value, prop) { str += prop + "(" + value + ") "; });
      t.style.transform = str;
    }
  }
};

// Set Value helper

function setTargetsValue(targets, properties) {
  var animatables = getAnimatables(targets);

  for (var i = 0, len = animatables.length; i < len; i++) {
    var animatable = animatables[i];

    for (var property in properties) {
      var value = getFunctionValue(properties[property], animatable);
      var target = animatable.target;
      var valueUnit = getUnit(value);
      var originalValue = getOriginalTargetValue(target, property, valueUnit, animatable);
      var unit = valueUnit || getUnit(originalValue);
      var to = getRelativeValue(validateValue(value, unit), originalValue);
      var animType = getAnimationType(target, property);
      setProgressValue[animType](target, property, to, animatable.transforms, true);
    }
  }
}

// Animations

function createAnimation(animatable, prop) {
  var animType = getAnimationType(animatable.target, prop.name);
  if (animType) {
    var tweens = normalizeTweens(prop, animatable);
    var lastTween = tweens[tweens.length - 1];
    return {
      type: animType,
      property: prop.name,
      animatable: animatable,
      tweens: tweens,
      duration: lastTween.end,
      delay: tweens[0].delay,
      endDelay: lastTween.endDelay
    }
  }
}

function getAnimations(animatables, properties) {
  return filterArray(flattenArray(animatables.map(function (animatable) {
    return properties.map(function (prop) {
      return createAnimation(animatable, prop);
    });
  })), function (a) { return !is.und(a); });
}

// Create Instance

function getInstanceTimings(animations, tweenSettings) {
  var animLength = animations.length;
  var getTlOffset = function (anim) { return anim.timelineOffset ? anim.timelineOffset : 0; };
  var timings = {};
  timings.duration = animLength ? Math.max.apply(Math, animations.map(function (anim) { return getTlOffset(anim) + anim.duration; })) : tweenSettings.duration;
  timings.delay = animLength ? Math.min.apply(Math, animations.map(function (anim) { return getTlOffset(anim) + anim.delay; })) : tweenSettings.delay;
  timings.endDelay = animLength ? timings.duration - Math.max.apply(Math, animations.map(function (anim) { return getTlOffset(anim) + anim.duration - anim.endDelay; })) : tweenSettings.endDelay;
  return timings;
}

var instanceID = 0;

function createNewInstance(params) {
  var instanceSettings = replaceObjectProps(defaultInstanceSettings, params);
  var tweenSettings = replaceObjectProps(defaultTweenSettings, params);
  var properties = getProperties(tweenSettings, params);
  var animatables = getAnimatables(params.targets);
  var animations = getAnimations(animatables, properties);
  var timings = getInstanceTimings(animations, tweenSettings);
  var id = instanceID;
  instanceID++;
  return mergeObjects(instanceSettings, {
    id: id,
    children: [],
    animatables: animatables,
    animations: animations,
    duration: timings.duration,
    delay: timings.delay,
    endDelay: timings.endDelay
  });
}

// Core

var activeInstances = [];
var pausedInstances = [];
var raf;

var engine = (function () {
  function play() {
    raf = requestAnimationFrame(step);
  }
  function step(t) {
    var activeInstancesLength = activeInstances.length;
    if (activeInstancesLength) {
      var i = 0;
      while (i < activeInstancesLength) {
        var activeInstance = activeInstances[i];
        if (!activeInstance.paused) {
          activeInstance.tick(t);
        } else {
          var instanceIndex = activeInstances.indexOf(activeInstance);
          if (instanceIndex > -1) {
            activeInstances.splice(instanceIndex, 1);
            activeInstancesLength = activeInstances.length;
          }
        }
        i++;
      }
      play();
    } else {
      raf = cancelAnimationFrame(raf);
    }
  }
  return play;
})();

function handleVisibilityChange() {
  if (document.hidden) {
    for (var i = 0, len = activeInstances.length; i < len; i++) {
      activeInstance[i].pause();
    }
    pausedInstances = activeInstances.slice(0);
    activeInstances = [];
  } else {
    for (var i$1 = 0, len$1 = pausedInstances.length; i$1 < len$1; i$1++) {
      pausedInstances[i$1].play();
    }
  }
}

document.addEventListener('visibilitychange', handleVisibilityChange);

// Public Instance

function anime(params) {
  if ( params === void 0 ) params = {};


  var startTime = 0, lastTime = 0, now = 0;
  var children, childrenLength = 0;
  var resolve = null;

  function makePromise() {
    return window.Promise && new Promise(function (_resolve) { return resolve = _resolve; });
  }

  var promise = makePromise();

  var instance = createNewInstance(params);

  function toggleInstanceDirection() {
    instance.reversed = !instance.reversed;
    for (var i = 0, len = children.length; i < len; i++) {
      children[i].reversed = instance.reversed;
    }
  }

  function adjustTime(time) {
    return instance.reversed ? instance.duration - time : time;
  }

  function resetTime() {
    startTime = 0;
    lastTime = adjustTime(instance.currentTime) * (1 / anime.speed);
  }

  function seekCild(time, child) {
    if (child) { child.seek(time - child.timelineOffset); }
  }

  function syncInstanceChildren(time) {
    if (!instance.reversePlayback) {
      for (var i = 0; i < childrenLength; i++) { seekCild(time, children[i]); }
    } else {
      for (var i$1 = childrenLength; i$1--;) { seekCild(time, children[i$1]); }
    }
  }

  function setAnimationsProgress(insTime) {
    var i = 0;
    var animations = instance.animations;
    var animationsLength = animations.length;
    while (i < animationsLength) {
      var anim = animations[i];
      var animatable = anim.animatable;
      var tweens = anim.tweens;
      var tweenLength = tweens.length - 1;
      var tween = tweens[tweenLength];
      // Only check for keyframes if there is more than one tween
      if (tweenLength) { tween = filterArray(tweens, function (t) { return (insTime < t.end); })[0] || tween; }
      var elapsed = minMax(insTime - tween.start - tween.delay, 0, tween.duration) / tween.duration;
      var eased = isNaN(elapsed) ? 1 : tween.easing(elapsed);
      var strings = tween.to.strings;
      var round = tween.round;
      var numbers = [];
      var toNumbersLength = tween.to.numbers.length;
      var progress = (void 0);
      for (var n = 0; n < toNumbersLength; n++) {
        var value = (void 0);
        var toNumber = tween.to.numbers[n];
        var fromNumber = tween.from.numbers[n] || 0;
        if (!tween.isPath) {
          value = fromNumber + (eased * (toNumber - fromNumber));
        } else {
          value = getPathProgress(tween.value, eased * toNumber);
        }
        if (round) {
          if (!(tween.isColor && n > 2)) {
            value = Math.round(value * round) / round;
          }
        }
        numbers.push(value);
      }
      // Manual Array.reduce for better performances
      var stringsLength = strings.length;
      if (!stringsLength) {
        progress = numbers[0];
      } else {
        progress = strings[0];
        for (var s = 0; s < stringsLength; s++) {
          var a = strings[s];
          var b = strings[s + 1];
          var n$1 = numbers[s];
          if (!isNaN(n$1)) {
            if (!b) {
              progress += n$1 + ' ';
            } else {
              progress += n$1 + b;
            }
          }
        }
      }
      setProgressValue[anim.type](animatable.target, anim.property, progress, animatable.transforms);
      anim.currentValue = progress;
      i++;
    }
  }

  function setCallback(cb) {
    if (instance[cb] && !instance.passThrough) { instance[cb](instance); }
  }

  function countIteration() {
    if (instance.remaining && instance.remaining !== true) {
      instance.remaining--;
    }
  }

  function setInstanceProgress(engineTime) {
    var insDuration = instance.duration;
    var insDelay = instance.delay;
    var insEndDelay = insDuration - instance.endDelay;
    var insTime = adjustTime(engineTime);
    instance.progress = minMax((insTime / insDuration) * 100, 0, 100);
    instance.reversePlayback = insTime < instance.currentTime;
    if (children) { syncInstanceChildren(insTime); }
    if (!instance.began && instance.currentTime > 0) {
      instance.began = true;
      setCallback('begin');
      setCallback('loopBegin');
    }
    if (insTime <= insDelay && instance.currentTime !== 0) {
      setAnimationsProgress(0);
    }
    if ((insTime >= insEndDelay && instance.currentTime !== insDuration) || !insDuration) {
      setAnimationsProgress(insDuration);
    }
    if (insTime > insDelay && insTime < insEndDelay) {
      if (!instance.changeBegan) {
        instance.changeBegan = true;
        instance.changeCompleted = false;
        setCallback('changeBegin');
      }
      setCallback('change');
      setAnimationsProgress(insTime);
    } else {
      if (instance.changeBegan) {
        instance.changeCompleted = true;
        instance.changeBegan = false;
        setCallback('changeComplete');
      }
    }
    instance.currentTime = minMax(insTime, 0, insDuration);
    if (instance.began) { setCallback('update'); }
    if (engineTime >= insDuration) {
      lastTime = 0;
      countIteration();
      if (instance.remaining) {
        startTime = now;
        setCallback('loopComplete');
        setCallback('loopBegin');
        if (instance.direction === 'alternate') { toggleInstanceDirection(); }
      } else {
        instance.paused = true;
        if (!instance.completed) {
          instance.completed = true;
          setCallback('loopComplete');
          setCallback('complete');
          if ('Promise' in window) {
            resolve();
            promise = makePromise();
          }
        }
      }
    }
  }

  instance.reset = function() {
    var direction = instance.direction;
    instance.passThrough = false;
    instance.currentTime = 0;
    instance.progress = 0;
    instance.paused = true;
    instance.began = false;
    instance.changeBegan = false;
    instance.completed = false;
    instance.changeCompleted = false;
    instance.reversePlayback = false;
    instance.reversed = direction === 'reverse';
    instance.remaining = instance.loop;
    children = instance.children;
    childrenLength = children.length;
    for (var i = childrenLength; i--;) { instance.children[i].reset(); }
    if (instance.reversed && instance.loop !== true || (direction === 'alternate' && instance.loop === 1)) { instance.remaining++; }
    setAnimationsProgress(0);
  };

  // Set Value helper

  instance.set = function(targets, properties) {
    setTargetsValue(targets, properties);
    return instance;
  };

  instance.tick = function(t) {
    now = t;
    if (!startTime) { startTime = now; }
    setInstanceProgress((now + (lastTime - startTime)) * anime.speed);
  };

  instance.seek = function(time) {
    setInstanceProgress(adjustTime(time));
  };

  instance.pause = function() {
    instance.paused = true;
    resetTime();
  };

  instance.play = function() {
    if (!instance.paused) { return; }
    instance.paused = false;
    activeInstances.push(instance);
    resetTime();
    if (!raf) { engine(); }
  };

  instance.reverse = function() {
    toggleInstanceDirection();
    resetTime();
  };

  instance.restart = function() {
    instance.reset();
    instance.play();
  };

  instance.finished = promise;
  instance.reset();

  if (instance.autoplay) { instance.play(); }

  return instance;

}

// Remove targets from animation

function removeTargetsFromAnimations(targetsArray, animations) {
  for (var a = animations.length; a--;) {
    if (arrayContains(targetsArray, animations[a].animatable.target)) {
      animations.splice(a, 1);
    }
  }
}

function removeTargets(targets) {
  var targetsArray = parseTargets(targets);
  for (var i = activeInstances.length; i--;) {
    var instance = activeInstances[i];
    var animations = instance.animations;
    var children = instance.children;
    removeTargetsFromAnimations(targetsArray, animations);
    for (var c = children.length; c--;) {
      var child = children[c];
      var childAnimations = child.animations;
      removeTargetsFromAnimations(targetsArray, childAnimations);
      if (!childAnimations.length && !child.children.length) { children.splice(c, 1); }
    }
    if (!animations.length && !children.length) { instance.pause(); }
  }
}

// Stagger helpers

function stagger(val, params) {
  if ( params === void 0 ) params = {};

  var direction = params.direction || 'normal';
  var easing = params.easing ? parseEasings(params.easing) : null;
  var grid = params.grid;
  var axis = params.axis;
  var fromIndex = params.from || 0;
  var fromFirst = fromIndex === 'first';
  var fromCenter = fromIndex === 'center';
  var fromLast = fromIndex === 'last';
  var isRange = is.arr(val);
  var val1 = isRange ? parseFloat(val[0]) : parseFloat(val);
  var val2 = isRange ? parseFloat(val[1]) : 0;
  var unit = getUnit(isRange ? val[1] : val) || 0;
  var start = params.start || 0 + (isRange ? val1 : 0);
  var values = [];
  var maxValue = 0;
  return function (el, i, t) {
    if (fromFirst) { fromIndex = 0; }
    if (fromCenter) { fromIndex = (t - 1) / 2; }
    if (fromLast) { fromIndex = t - 1; }
    if (!values.length) {
      for (var index = 0; index < t; index++) {
        if (!grid) {
          values.push(Math.abs(fromIndex - index));
        } else {
          var fromX = !fromCenter ? fromIndex%grid[0] : (grid[0]-1)/2;
          var fromY = !fromCenter ? Math.floor(fromIndex/grid[0]) : (grid[1]-1)/2;
          var toX = index%grid[0];
          var toY = Math.floor(index/grid[0]);
          var distanceX = fromX - toX;
          var distanceY = fromY - toY;
          var value = Math.sqrt(distanceX * distanceX + distanceY * distanceY);
          if (axis === 'x') { value = -distanceX; }
          if (axis === 'y') { value = -distanceY; }
          values.push(value);
        }
        maxValue = Math.max.apply(Math, values);
      }
      if (easing) { values = values.map(function (val) { return easing(val / maxValue) * maxValue; }); }
      if (direction === 'reverse') { values = values.map(function (val) { return axis ? (val < 0) ? val * -1 : -val : Math.abs(maxValue - val); }); }
    }
    var spacing = isRange ? (val2 - val1) / maxValue : val1;
    return start + (spacing * (Math.round(values[i] * 100) / 100)) + unit;
  }
}

// Timeline

function timeline(params) {
  if ( params === void 0 ) params = {};

  var tl = anime(params);
  tl.duration = 0;
  tl.add = function(instanceParams, timelineOffset) {
    var tlIndex = activeInstances.indexOf(tl);
    var children = tl.children;
    if (tlIndex > -1) { activeInstances.splice(tlIndex, 1); }
    function passThrough(ins) { ins.passThrough = true; }
    for (var i = 0; i < children.length; i++) { passThrough(children[i]); }
    var insParams = mergeObjects(instanceParams, replaceObjectProps(defaultTweenSettings, params));
    insParams.targets = insParams.targets || params.targets;
    var tlDuration = tl.duration;
    insParams.autoplay = false;
    insParams.direction = tl.direction;
    insParams.timelineOffset = is.und(timelineOffset) ? tlDuration : getRelativeValue(timelineOffset, tlDuration);
    passThrough(tl);
    tl.seek(insParams.timelineOffset);
    var ins = anime(insParams);
    passThrough(ins);
    children.push(ins);
    var timings = getInstanceTimings(children, params);
    tl.delay = timings.delay;
    tl.endDelay = timings.endDelay;
    tl.duration = timings.duration;
    tl.seek(0);
    tl.reset();
    if (tl.autoplay) { tl.play(); }
    return tl;
  };
  return tl;
}

anime.version = '3.0.0';
anime.speed = 1;
anime.running = activeInstances;
anime.remove = removeTargets;
anime.get = getOriginalTargetValue;
anime.set = setTargetsValue;
anime.convertPx = convertPxToUnit;
anime.path = getPath;
anime.setDashoffset = setDashoffset;
anime.stagger = stagger;
anime.timeline = timeline;
anime.easing = parseEasings;
anime.penner = penner;
anime.random = function (min, max) { return Math.floor(Math.random() * (max - min + 1)) + min; };

module.exports = anime;

},{}],37:[function(_dereq_,module,exports){
// threejs.org/license
(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
	typeof define === 'function' && define.amd ? define(['exports'], factory) :
	(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.THREE = {}));
}(this, (function (exports) { 'use strict';

	// Polyfills
	if (Number.EPSILON === undefined) {
		Number.EPSILON = Math.pow(2, -52);
	}

	if (Number.isInteger === undefined) {
		// Missing in IE
		// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger
		Number.isInteger = function (value) {
			return typeof value === 'number' && isFinite(value) && Math.floor(value) === value;
		};
	} //


	if (Math.sign === undefined) {
		// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign
		Math.sign = function (x) {
			return x < 0 ? -1 : x > 0 ? 1 : +x;
		};
	}

	if ('name' in Function.prototype === false) {
		// Missing in IE
		// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name
		Object.defineProperty(Function.prototype, 'name', {
			get: function get() {
				return this.toString().match(/^\s*function\s*([^\(\s]*)/)[1];
			}
		});
	}

	if (Object.assign === undefined) {
		// Missing in IE
		// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
		Object.assign = function (target) {

			if (target === undefined || target === null) {
				throw new TypeError('Cannot convert undefined or null to object');
			}

			var output = Object(target);

			for (var index = 1; index < arguments.length; index++) {
				var source = arguments[index];

				if (source !== undefined && source !== null) {
					for (var nextKey in source) {
						if (Object.prototype.hasOwnProperty.call(source, nextKey)) {
							output[nextKey] = source[nextKey];
						}
					}
				}
			}

			return output;
		};
	}

	/**
	 * Copyright (c) 2014-present, Facebook, Inc.
	 *
	 * This source code is licensed under the MIT license found in the
	 * LICENSE file in the root directory of this source tree.
	 */
	var runtime = function (exports) {

		var Op = Object.prototype;
		var hasOwn = Op.hasOwnProperty;
		var undefined$1; // More compressible than void 0.

		var $Symbol = typeof Symbol === "function" ? Symbol : {};
		var iteratorSymbol = $Symbol.iterator || "@@iterator";
		var asyncIteratorSymbol = $Symbol.asyncIterator || "@@asyncIterator";
		var toStringTagSymbol = $Symbol.toStringTag || "@@toStringTag";

		function define(obj, key, value) {
			Object.defineProperty(obj, key, {
				value: value,
				enumerable: true,
				configurable: true,
				writable: true
			});
			return obj[key];
		}

		try {
			// IE 8 has a broken Object.defineProperty that only works on DOM objects.
			define({}, "");
		} catch (err) {
			define = function define(obj, key, value) {
				return obj[key] = value;
			};
		}

		function wrap(innerFn, outerFn, self, tryLocsList) {
			// If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.
			var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;
			var generator = Object.create(protoGenerator.prototype);
			var context = new Context(tryLocsList || []); // The ._invoke method unifies the implementations of the .next,
			// .throw, and .return methods.

			generator._invoke = makeInvokeMethod(innerFn, self, context);
			return generator;
		}

		exports.wrap = wrap; // Try/catch helper to minimize deoptimizations. Returns a completion
		// record like context.tryEntries[i].completion. This interface could
		// have been (and was previously) designed to take a closure to be
		// invoked without arguments, but in all the cases we care about we
		// already have an existing method we want to call, so there's no need
		// to create a new function object. We can even get away with assuming
		// the method takes exactly one argument, since that happens to be true
		// in every case, so we don't have to touch the arguments object. The
		// only additional allocation required is the completion record, which
		// has a stable shape and so hopefully should be cheap to allocate.

		function tryCatch(fn, obj, arg) {
			try {
				return {
					type: "normal",
					arg: fn.call(obj, arg)
				};
			} catch (err) {
				return {
					type: "throw",
					arg: err
				};
			}
		}

		var GenStateSuspendedStart = "suspendedStart";
		var GenStateSuspendedYield = "suspendedYield";
		var GenStateExecuting = "executing";
		var GenStateCompleted = "completed"; // Returning this object from the innerFn has the same effect as
		// breaking out of the dispatch switch statement.

		var ContinueSentinel = {}; // Dummy constructor functions that we use as the .constructor and
		// .constructor.prototype properties for functions that return Generator
		// objects. For full spec compliance, you may wish to configure your
		// minifier not to mangle the names of these two functions.

		function Generator() {}

		function GeneratorFunction() {}

		function GeneratorFunctionPrototype() {} // This is a polyfill for %IteratorPrototype% for environments that
		// don't natively support it.


		var IteratorPrototype = {};

		IteratorPrototype[iteratorSymbol] = function () {
			return this;
		};

		var getProto = Object.getPrototypeOf;
		var NativeIteratorPrototype = getProto && getProto(getProto(values([])));

		if (NativeIteratorPrototype && NativeIteratorPrototype !== Op && hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {
			// This environment has a native %IteratorPrototype%; use it instead
			// of the polyfill.
			IteratorPrototype = NativeIteratorPrototype;
		}

		var Gp = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(IteratorPrototype);
		GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;
		GeneratorFunctionPrototype.constructor = GeneratorFunction;
		GeneratorFunction.displayName = define(GeneratorFunctionPrototype, toStringTagSymbol, "GeneratorFunction"); // Helper for defining the .next, .throw, and .return methods of the
		// Iterator interface in terms of a single ._invoke method.

		function defineIteratorMethods(prototype) {
			["next", "throw", "return"].forEach(function (method) {
				define(prototype, method, function (arg) {
					return this._invoke(method, arg);
				});
			});
		}

		exports.isGeneratorFunction = function (genFun) {
			var ctor = typeof genFun === "function" && genFun.constructor;
			return ctor ? ctor === GeneratorFunction || // For the native GeneratorFunction constructor, the best we can
			// do is to check its .name property.
			(ctor.displayName || ctor.name) === "GeneratorFunction" : false;
		};

		exports.mark = function (genFun) {
			if (Object.setPrototypeOf) {
				Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);
			} else {
				genFun.__proto__ = GeneratorFunctionPrototype;
				define(genFun, toStringTagSymbol, "GeneratorFunction");
			}

			genFun.prototype = Object.create(Gp);
			return genFun;
		}; // Within the body of any async function, `await x` is transformed to
		// `yield regeneratorRuntime.awrap(x)`, so that the runtime can test
		// `hasOwn.call(value, "__await")` to determine if the yielded value is
		// meant to be awaited.


		exports.awrap = function (arg) {
			return {
				__await: arg
			};
		};

		function AsyncIterator(generator, PromiseImpl) {
			function invoke(method, arg, resolve, reject) {
				var record = tryCatch(generator[method], generator, arg);

				if (record.type === "throw") {
					reject(record.arg);
				} else {
					var result = record.arg;
					var value = result.value;

					if (value && typeof value === "object" && hasOwn.call(value, "__await")) {
						return PromiseImpl.resolve(value.__await).then(function (value) {
							invoke("next", value, resolve, reject);
						}, function (err) {
							invoke("throw", err, resolve, reject);
						});
					}

					return PromiseImpl.resolve(value).then(function (unwrapped) {
						// When a yielded Promise is resolved, its final value becomes
						// the .value of the Promise<{value,done}> result for the
						// current iteration.
						result.value = unwrapped;
						resolve(result);
					}, function (error) {
						// If a rejected Promise was yielded, throw the rejection back
						// into the async generator function so it can be handled there.
						return invoke("throw", error, resolve, reject);
					});
				}
			}

			var previousPromise;

			function enqueue(method, arg) {
				function callInvokeWithMethodAndArg() {
					return new PromiseImpl(function (resolve, reject) {
						invoke(method, arg, resolve, reject);
					});
				}

				return previousPromise = // If enqueue has been called before, then we want to wait until
				// all previous Promises have been resolved before calling invoke,
				// so that results are always delivered in the correct order. If
				// enqueue has not been called before, then it is important to
				// call invoke immediately, without waiting on a callback to fire,
				// so that the async generator function has the opportunity to do
				// any necessary setup in a predictable way. This predictability
				// is why the Promise constructor synchronously invokes its
				// executor callback, and why async functions synchronously
				// execute code before the first await. Since we implement simple
				// async functions in terms of async generators, it is especially
				// important to get this right, even though it requires care.
				previousPromise ? previousPromise.then(callInvokeWithMethodAndArg, // Avoid propagating failures to Promises returned by later
				// invocations of the iterator.
				callInvokeWithMethodAndArg) : callInvokeWithMethodAndArg();
			} // Define the unified helper method that is used to implement .next,
			// .throw, and .return (see defineIteratorMethods).


			this._invoke = enqueue;
		}

		defineIteratorMethods(AsyncIterator.prototype);

		AsyncIterator.prototype[asyncIteratorSymbol] = function () {
			return this;
		};

		exports.AsyncIterator = AsyncIterator; // Note that simple async functions are implemented on top of
		// AsyncIterator objects; they just return a Promise for the value of
		// the final result produced by the iterator.

		exports.async = function (innerFn, outerFn, self, tryLocsList, PromiseImpl) {
			if (PromiseImpl === void 0) PromiseImpl = Promise;
			var iter = new AsyncIterator(wrap(innerFn, outerFn, self, tryLocsList), PromiseImpl);
			return exports.isGeneratorFunction(outerFn) ? iter // If outerFn is a generator, return the full iterator.
			: iter.next().then(function (result) {
				return result.done ? result.value : iter.next();
			});
		};

		function makeInvokeMethod(innerFn, self, context) {
			var state = GenStateSuspendedStart;
			return function invoke(method, arg) {
				if (state === GenStateExecuting) {
					throw new Error("Generator is already running");
				}

				if (state === GenStateCompleted) {
					if (method === "throw") {
						throw arg;
					} // Be forgiving, per 25.3.3.3.3 of the spec:
					// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume


					return doneResult();
				}

				context.method = method;
				context.arg = arg;

				while (true) {
					var delegate = context.delegate;

					if (delegate) {
						var delegateResult = maybeInvokeDelegate(delegate, context);

						if (delegateResult) {
							if (delegateResult === ContinueSentinel) continue;
							return delegateResult;
						}
					}

					if (context.method === "next") {
						// Setting context._sent for legacy support of Babel's
						// function.sent implementation.
						context.sent = context._sent = context.arg;
					} else if (context.method === "throw") {
						if (state === GenStateSuspendedStart) {
							state = GenStateCompleted;
							throw context.arg;
						}

						context.dispatchException(context.arg);
					} else if (context.method === "return") {
						context.abrupt("return", context.arg);
					}

					state = GenStateExecuting;
					var record = tryCatch(innerFn, self, context);

					if (record.type === "normal") {
						// If an exception is thrown from innerFn, we leave state ===
						// GenStateExecuting and loop back for another invocation.
						state = context.done ? GenStateCompleted : GenStateSuspendedYield;

						if (record.arg === ContinueSentinel) {
							continue;
						}

						return {
							value: record.arg,
							done: context.done
						};
					} else if (record.type === "throw") {
						state = GenStateCompleted; // Dispatch the exception by looping back around to the
						// context.dispatchException(context.arg) call above.

						context.method = "throw";
						context.arg = record.arg;
					}
				}
			};
		} // Call delegate.iterator[context.method](context.arg) and handle the
		// result, either by returning a { value, done } result from the
		// delegate iterator, or by modifying context.method and context.arg,
		// setting context.delegate to null, and returning the ContinueSentinel.


		function maybeInvokeDelegate(delegate, context) {
			var method = delegate.iterator[context.method];

			if (method === undefined$1) {
				// A .throw or .return when the delegate iterator has no .throw
				// method always terminates the yield* loop.
				context.delegate = null;

				if (context.method === "throw") {
					// Note: ["return"] must be used for ES3 parsing compatibility.
					if (delegate.iterator["return"]) {
						// If the delegate iterator has a return method, give it a
						// chance to clean up.
						context.method = "return";
						context.arg = undefined$1;
						maybeInvokeDelegate(delegate, context);

						if (context.method === "throw") {
							// If maybeInvokeDelegate(context) changed context.method from
							// "return" to "throw", let that override the TypeError below.
							return ContinueSentinel;
						}
					}

					context.method = "throw";
					context.arg = new TypeError("The iterator does not provide a 'throw' method");
				}

				return ContinueSentinel;
			}

			var record = tryCatch(method, delegate.iterator, context.arg);

			if (record.type === "throw") {
				context.method = "throw";
				context.arg = record.arg;
				context.delegate = null;
				return ContinueSentinel;
			}

			var info = record.arg;

			if (!info) {
				context.method = "throw";
				context.arg = new TypeError("iterator result is not an object");
				context.delegate = null;
				return ContinueSentinel;
			}

			if (info.done) {
				// Assign the result of the finished delegate to the temporary
				// variable specified by delegate.resultName (see delegateYield).
				context[delegate.resultName] = info.value; // Resume execution at the desired location (see delegateYield).

				context.next = delegate.nextLoc; // If context.method was "throw" but the delegate handled the
				// exception, let the outer generator proceed normally. If
				// context.method was "next", forget context.arg since it has been
				// "consumed" by the delegate iterator. If context.method was
				// "return", allow the original .return call to continue in the
				// outer generator.

				if (context.method !== "return") {
					context.method = "next";
					context.arg = undefined$1;
				}
			} else {
				// Re-yield the result returned by the delegate method.
				return info;
			} // The delegate iterator is finished, so forget it and continue with
			// the outer generator.


			context.delegate = null;
			return ContinueSentinel;
		} // Define Generator.prototype.{next,throw,return} in terms of the
		// unified ._invoke helper method.


		defineIteratorMethods(Gp);
		define(Gp, toStringTagSymbol, "Generator"); // A Generator should always return itself as the iterator object when the
		// @@iterator function is called on it. Some browsers' implementations of the
		// iterator prototype chain incorrectly implement this, causing the Generator
		// object to not be returned from this call. This ensures that doesn't happen.
		// See https://github.com/facebook/regenerator/issues/274 for more details.

		Gp[iteratorSymbol] = function () {
			return this;
		};

		Gp.toString = function () {
			return "[object Generator]";
		};

		function pushTryEntry(locs) {
			var entry = {
				tryLoc: locs[0]
			};

			if (1 in locs) {
				entry.catchLoc = locs[1];
			}

			if (2 in locs) {
				entry.finallyLoc = locs[2];
				entry.afterLoc = locs[3];
			}

			this.tryEntries.push(entry);
		}

		function resetTryEntry(entry) {
			var record = entry.completion || {};
			record.type = "normal";
			delete record.arg;
			entry.completion = record;
		}

		function Context(tryLocsList) {
			// The root entry object (effectively a try statement without a catch
			// or a finally block) gives us a place to store values thrown from
			// locations where there is no enclosing try statement.
			this.tryEntries = [{
				tryLoc: "root"
			}];
			tryLocsList.forEach(pushTryEntry, this);
			this.reset(true);
		}

		exports.keys = function (object) {
			var keys = [];

			for (var key in object) {
				keys.push(key);
			}

			keys.reverse(); // Rather than returning an object with a next method, we keep
			// things simple and return the next function itself.

			return function next() {
				while (keys.length) {
					var key = keys.pop();

					if (key in object) {
						next.value = key;
						next.done = false;
						return next;
					}
				} // To avoid creating an additional object, we just hang the .value
				// and .done properties off the next function object itself. This
				// also ensures that the minifier will not anonymize the function.


				next.done = true;
				return next;
			};
		};

		function values(iterable) {
			if (iterable) {
				var iteratorMethod = iterable[iteratorSymbol];

				if (iteratorMethod) {
					return iteratorMethod.call(iterable);
				}

				if (typeof iterable.next === "function") {
					return iterable;
				}

				if (!isNaN(iterable.length)) {
					var i = -1,
							next = function next() {
						while (++i < iterable.length) {
							if (hasOwn.call(iterable, i)) {
								next.value = iterable[i];
								next.done = false;
								return next;
							}
						}

						next.value = undefined$1;
						next.done = true;
						return next;
					};

					return next.next = next;
				}
			} // Return an iterator with no values.


			return {
				next: doneResult
			};
		}

		exports.values = values;

		function doneResult() {
			return {
				value: undefined$1,
				done: true
			};
		}

		Context.prototype = {
			constructor: Context,
			reset: function reset(skipTempReset) {
				this.prev = 0;
				this.next = 0; // Resetting context._sent for legacy support of Babel's
				// function.sent implementation.

				this.sent = this._sent = undefined$1;
				this.done = false;
				this.delegate = null;
				this.method = "next";
				this.arg = undefined$1;
				this.tryEntries.forEach(resetTryEntry);

				if (!skipTempReset) {
					for (var name in this) {
						// Not sure about the optimal order of these conditions:
						if (name.charAt(0) === "t" && hasOwn.call(this, name) && !isNaN(+name.slice(1))) {
							this[name] = undefined$1;
						}
					}
				}
			},
			stop: function stop() {
				this.done = true;
				var rootEntry = this.tryEntries[0];
				var rootRecord = rootEntry.completion;

				if (rootRecord.type === "throw") {
					throw rootRecord.arg;
				}

				return this.rval;
			},
			dispatchException: function dispatchException(exception) {
				if (this.done) {
					throw exception;
				}

				var context = this;

				function handle(loc, caught) {
					record.type = "throw";
					record.arg = exception;
					context.next = loc;

					if (caught) {
						// If the dispatched exception was caught by a catch block,
						// then let that catch block handle the exception normally.
						context.method = "next";
						context.arg = undefined$1;
					}

					return !!caught;
				}

				for (var i = this.tryEntries.length - 1; i >= 0; --i) {
					var entry = this.tryEntries[i];
					var record = entry.completion;

					if (entry.tryLoc === "root") {
						// Exception thrown outside of any try block that could handle
						// it, so set the completion value of the entire function to
						// throw the exception.
						return handle("end");
					}

					if (entry.tryLoc <= this.prev) {
						var hasCatch = hasOwn.call(entry, "catchLoc");
						var hasFinally = hasOwn.call(entry, "finallyLoc");

						if (hasCatch && hasFinally) {
							if (this.prev < entry.catchLoc) {
								return handle(entry.catchLoc, true);
							} else if (this.prev < entry.finallyLoc) {
								return handle(entry.finallyLoc);
							}
						} else if (hasCatch) {
							if (this.prev < entry.catchLoc) {
								return handle(entry.catchLoc, true);
							}
						} else if (hasFinally) {
							if (this.prev < entry.finallyLoc) {
								return handle(entry.finallyLoc);
							}
						} else {
							throw new Error("try statement without catch or finally");
						}
					}
				}
			},
			abrupt: function abrupt(type, arg) {
				for (var i = this.tryEntries.length - 1; i >= 0; --i) {
					var entry = this.tryEntries[i];

					if (entry.tryLoc <= this.prev && hasOwn.call(entry, "finallyLoc") && this.prev < entry.finallyLoc) {
						var finallyEntry = entry;
						break;
					}
				}

				if (finallyEntry && (type === "break" || type === "continue") && finallyEntry.tryLoc <= arg && arg <= finallyEntry.finallyLoc) {
					// Ignore the finally entry if control is not jumping to a
					// location outside the try/catch block.
					finallyEntry = null;
				}

				var record = finallyEntry ? finallyEntry.completion : {};
				record.type = type;
				record.arg = arg;

				if (finallyEntry) {
					this.method = "next";
					this.next = finallyEntry.finallyLoc;
					return ContinueSentinel;
				}

				return this.complete(record);
			},
			complete: function complete(record, afterLoc) {
				if (record.type === "throw") {
					throw record.arg;
				}

				if (record.type === "break" || record.type === "continue") {
					this.next = record.arg;
				} else if (record.type === "return") {
					this.rval = this.arg = record.arg;
					this.method = "return";
					this.next = "end";
				} else if (record.type === "normal" && afterLoc) {
					this.next = afterLoc;
				}

				return ContinueSentinel;
			},
			finish: function finish(finallyLoc) {
				for (var i = this.tryEntries.length - 1; i >= 0; --i) {
					var entry = this.tryEntries[i];

					if (entry.finallyLoc === finallyLoc) {
						this.complete(entry.completion, entry.afterLoc);
						resetTryEntry(entry);
						return ContinueSentinel;
					}
				}
			},
			"catch": function _catch(tryLoc) {
				for (var i = this.tryEntries.length - 1; i >= 0; --i) {
					var entry = this.tryEntries[i];

					if (entry.tryLoc === tryLoc) {
						var record = entry.completion;

						if (record.type === "throw") {
							var thrown = record.arg;
							resetTryEntry(entry);
						}

						return thrown;
					}
				} // The context.catch method must only be called with a location
				// argument that corresponds to a known catch block.


				throw new Error("illegal catch attempt");
			},
			delegateYield: function delegateYield(iterable, resultName, nextLoc) {
				this.delegate = {
					iterator: values(iterable),
					resultName: resultName,
					nextLoc: nextLoc
				};

				if (this.method === "next") {
					// Deliberately forget the last sent value so that we don't
					// accidentally pass it on to the delegate.
					this.arg = undefined$1;
				}

				return ContinueSentinel;
			}
		}; // Regardless of whether this script is executing as a CommonJS module
		// or not, return the runtime object so that we can declare the variable
		// regeneratorRuntime in the outer scope, which allows this module to be
		// injected easily by `bin/regenerator --include-runtime script.js`.

		return exports;
	}( // If this script is executing as a CommonJS module, use module.exports
	// as the regeneratorRuntime namespace. Otherwise create a new empty
	// object. Either way, the resulting object will be used to initialize
	// the regeneratorRuntime variable at the top of this file.
	typeof module === "object" ? module.exports : {});

	try {
		regeneratorRuntime = runtime;
	} catch (accidentalStrictMode) {
		// This module should not be running in strict mode, so the above
		// assignment should always work unless something is misconfigured. Just
		// in case runtime.js accidentally runs in strict mode, we can escape
		// strict mode using a global Function call. This could conceivably fail
		// if a Content Security Policy forbids using Function, but in that case
		// the proper solution is to fix the accidental strict mode problem. If
		// you've misconfigured your bundler to force strict mode and applied a
		// CSP to forbid Function, and you're not willing to fix either of those
		// problems, please detail your unique predicament in a GitHub issue.
		Function("r", "regeneratorRuntime = r")(runtime);
	}

	var REVISION = '125';
	var MOUSE = {
		LEFT: 0,
		MIDDLE: 1,
		RIGHT: 2,
		ROTATE: 0,
		DOLLY: 1,
		PAN: 2
	};
	var TOUCH = {
		ROTATE: 0,
		PAN: 1,
		DOLLY_PAN: 2,
		DOLLY_ROTATE: 3
	};
	var CullFaceNone = 0;
	var CullFaceBack = 1;
	var CullFaceFront = 2;
	var CullFaceFrontBack = 3;
	var BasicShadowMap = 0;
	var PCFShadowMap = 1;
	var PCFSoftShadowMap = 2;
	var VSMShadowMap = 3;
	var FrontSide = 0;
	var BackSide = 1;
	var DoubleSide = 2;
	var FlatShading = 1;
	var SmoothShading = 2;
	var NoBlending = 0;
	var NormalBlending = 1;
	var AdditiveBlending = 2;
	var SubtractiveBlending = 3;
	var MultiplyBlending = 4;
	var CustomBlending = 5;
	var AddEquation = 100;
	var SubtractEquation = 101;
	var ReverseSubtractEquation = 102;
	var MinEquation = 103;
	var MaxEquation = 104;
	var ZeroFactor = 200;
	var OneFactor = 201;
	var SrcColorFactor = 202;
	var OneMinusSrcColorFactor = 203;
	var SrcAlphaFactor = 204;
	var OneMinusSrcAlphaFactor = 205;
	var DstAlphaFactor = 206;
	var OneMinusDstAlphaFactor = 207;
	var DstColorFactor = 208;
	var OneMinusDstColorFactor = 209;
	var SrcAlphaSaturateFactor = 210;
	var NeverDepth = 0;
	var AlwaysDepth = 1;
	var LessDepth = 2;
	var LessEqualDepth = 3;
	var EqualDepth = 4;
	var GreaterEqualDepth = 5;
	var GreaterDepth = 6;
	var NotEqualDepth = 7;
	var MultiplyOperation = 0;
	var MixOperation = 1;
	var AddOperation = 2;
	var NoToneMapping = 0;
	var LinearToneMapping = 1;
	var ReinhardToneMapping = 2;
	var CineonToneMapping = 3;
	var ACESFilmicToneMapping = 4;
	var CustomToneMapping = 5;
	var UVMapping = 300;
	var CubeReflectionMapping = 301;
	var CubeRefractionMapping = 302;
	var EquirectangularReflectionMapping = 303;
	var EquirectangularRefractionMapping = 304;
	var CubeUVReflectionMapping = 306;
	var CubeUVRefractionMapping = 307;
	var RepeatWrapping = 1000;
	var ClampToEdgeWrapping = 1001;
	var MirroredRepeatWrapping = 1002;
	var NearestFilter = 1003;
	var NearestMipmapNearestFilter = 1004;
	var NearestMipMapNearestFilter = 1004;
	var NearestMipmapLinearFilter = 1005;
	var NearestMipMapLinearFilter = 1005;
	var LinearFilter = 1006;
	var LinearMipmapNearestFilter = 1007;
	var LinearMipMapNearestFilter = 1007;
	var LinearMipmapLinearFilter = 1008;
	var LinearMipMapLinearFilter = 1008;
	var UnsignedByteType = 1009;
	var ByteType = 1010;
	var ShortType = 1011;
	var UnsignedShortType = 1012;
	var IntType = 1013;
	var UnsignedIntType = 1014;
	var FloatType = 1015;
	var HalfFloatType = 1016;
	var UnsignedShort4444Type = 1017;
	var UnsignedShort5551Type = 1018;
	var UnsignedShort565Type = 1019;
	var UnsignedInt248Type = 1020;
	var AlphaFormat = 1021;
	var RGBFormat = 1022;
	var RGBAFormat = 1023;
	var LuminanceFormat = 1024;
	var LuminanceAlphaFormat = 1025;
	var RGBEFormat = RGBAFormat;
	var DepthFormat = 1026;
	var DepthStencilFormat = 1027;
	var RedFormat = 1028;
	var RedIntegerFormat = 1029;
	var RGFormat = 1030;
	var RGIntegerFormat = 1031;
	var RGBIntegerFormat = 1032;
	var RGBAIntegerFormat = 1033;
	var RGB_S3TC_DXT1_Format = 33776;
	var RGBA_S3TC_DXT1_Format = 33777;
	var RGBA_S3TC_DXT3_Format = 33778;
	var RGBA_S3TC_DXT5_Format = 33779;
	var RGB_PVRTC_4BPPV1_Format = 35840;
	var RGB_PVRTC_2BPPV1_Format = 35841;
	var RGBA_PVRTC_4BPPV1_Format = 35842;
	var RGBA_PVRTC_2BPPV1_Format = 35843;
	var RGB_ETC1_Format = 36196;
	var RGB_ETC2_Format = 37492;
	var RGBA_ETC2_EAC_Format = 37496;
	var RGBA_ASTC_4x4_Format = 37808;
	var RGBA_ASTC_5x4_Format = 37809;
	var RGBA_ASTC_5x5_Format = 37810;
	var RGBA_ASTC_6x5_Format = 37811;
	var RGBA_ASTC_6x6_Format = 37812;
	var RGBA_ASTC_8x5_Format = 37813;
	var RGBA_ASTC_8x6_Format = 37814;
	var RGBA_ASTC_8x8_Format = 37815;
	var RGBA_ASTC_10x5_Format = 37816;
	var RGBA_ASTC_10x6_Format = 37817;
	var RGBA_ASTC_10x8_Format = 37818;
	var RGBA_ASTC_10x10_Format = 37819;
	var RGBA_ASTC_12x10_Format = 37820;
	var RGBA_ASTC_12x12_Format = 37821;
	var RGBA_BPTC_Format = 36492;
	var SRGB8_ALPHA8_ASTC_4x4_Format = 37840;
	var SRGB8_ALPHA8_ASTC_5x4_Format = 37841;
	var SRGB8_ALPHA8_ASTC_5x5_Format = 37842;
	var SRGB8_ALPHA8_ASTC_6x5_Format = 37843;
	var SRGB8_ALPHA8_ASTC_6x6_Format = 37844;
	var SRGB8_ALPHA8_ASTC_8x5_Format = 37845;
	var SRGB8_ALPHA8_ASTC_8x6_Format = 37846;
	var SRGB8_ALPHA8_ASTC_8x8_Format = 37847;
	var SRGB8_ALPHA8_ASTC_10x5_Format = 37848;
	var SRGB8_ALPHA8_ASTC_10x6_Format = 37849;
	var SRGB8_ALPHA8_ASTC_10x8_Format = 37850;
	var SRGB8_ALPHA8_ASTC_10x10_Format = 37851;
	var SRGB8_ALPHA8_ASTC_12x10_Format = 37852;
	var SRGB8_ALPHA8_ASTC_12x12_Format = 37853;
	var LoopOnce = 2200;
	var LoopRepeat = 2201;
	var LoopPingPong = 2202;
	var InterpolateDiscrete = 2300;
	var InterpolateLinear = 2301;
	var InterpolateSmooth = 2302;
	var ZeroCurvatureEnding = 2400;
	var ZeroSlopeEnding = 2401;
	var WrapAroundEnding = 2402;
	var NormalAnimationBlendMode = 2500;
	var AdditiveAnimationBlendMode = 2501;
	var TrianglesDrawMode = 0;
	var TriangleStripDrawMode = 1;
	var TriangleFanDrawMode = 2;
	var LinearEncoding = 3000;
	var sRGBEncoding = 3001;
	var GammaEncoding = 3007;
	var RGBEEncoding = 3002;
	var LogLuvEncoding = 3003;
	var RGBM7Encoding = 3004;
	var RGBM16Encoding = 3005;
	var RGBDEncoding = 3006;
	var BasicDepthPacking = 3200;
	var RGBADepthPacking = 3201;
	var TangentSpaceNormalMap = 0;
	var ObjectSpaceNormalMap = 1;
	var ZeroStencilOp = 0;
	var KeepStencilOp = 7680;
	var ReplaceStencilOp = 7681;
	var IncrementStencilOp = 7682;
	var DecrementStencilOp = 7683;
	var IncrementWrapStencilOp = 34055;
	var DecrementWrapStencilOp = 34056;
	var InvertStencilOp = 5386;
	var NeverStencilFunc = 512;
	var LessStencilFunc = 513;
	var EqualStencilFunc = 514;
	var LessEqualStencilFunc = 515;
	var GreaterStencilFunc = 516;
	var NotEqualStencilFunc = 517;
	var GreaterEqualStencilFunc = 518;
	var AlwaysStencilFunc = 519;
	var StaticDrawUsage = 35044;
	var DynamicDrawUsage = 35048;
	var StreamDrawUsage = 35040;
	var StaticReadUsage = 35045;
	var DynamicReadUsage = 35049;
	var StreamReadUsage = 35041;
	var StaticCopyUsage = 35046;
	var DynamicCopyUsage = 35050;
	var StreamCopyUsage = 35042;
	var GLSL1 = '100';
	var GLSL3 = '300 es';

	function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
		try {
			var info = gen[key](arg);
			var value = info.value;
		} catch (error) {
			reject(error);
			return;
		}

		if (info.done) {
			resolve(value);
		} else {
			Promise.resolve(value).then(_next, _throw);
		}
	}

	function _asyncToGenerator(fn) {
		return function () {
			var self = this,
					args = arguments;
			return new Promise(function (resolve, reject) {
				var gen = fn.apply(self, args);

				function _next(value) {
					asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value);
				}

				function _throw(err) {
					asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err);
				}

				_next(undefined);
			});
		};
	}

	function _defineProperties(target, props) {
		for (var i = 0; i < props.length; i++) {
			var descriptor = props[i];
			descriptor.enumerable = descriptor.enumerable || false;
			descriptor.configurable = true;
			if ("value" in descriptor) descriptor.writable = true;
			Object.defineProperty(target, descriptor.key, descriptor);
		}
	}

	function _createClass(Constructor, protoProps, staticProps) {
		if (protoProps) _defineProperties(Constructor.prototype, protoProps);
		if (staticProps) _defineProperties(Constructor, staticProps);
		return Constructor;
	}

	function _inheritsLoose(subClass, superClass) {
		subClass.prototype = Object.create(superClass.prototype);
		subClass.prototype.constructor = subClass;
		subClass.__proto__ = superClass;
	}

	function _assertThisInitialized(self) {
		if (self === void 0) {
			throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
		}

		return self;
	}

	function _unsupportedIterableToArray(o, minLen) {
		if (!o) return;
		if (typeof o === "string") return _arrayLikeToArray(o, minLen);
		var n = Object.prototype.toString.call(o).slice(8, -1);
		if (n === "Object" && o.constructor) n = o.constructor.name;
		if (n === "Map" || n === "Set") return Array.from(o);
		if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
	}

	function _arrayLikeToArray(arr, len) {
		if (len == null || len > arr.length) len = arr.length;

		for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];

		return arr2;
	}

	function _createForOfIteratorHelperLoose(o, allowArrayLike) {
		var it;

		if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) {
			if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
				if (it) o = it;
				var i = 0;
				return function () {
					if (i >= o.length) return {
						done: true
					};
					return {
						done: false,
						value: o[i++]
					};
				};
			}

			throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
		}

		it = o[Symbol.iterator]();
		return it.next.bind(it);
	}

	/**
	 * https://github.com/mrdoob/eventdispatcher.js/
	 */
	function EventDispatcher() {}

	Object.assign(EventDispatcher.prototype, {
		addEventListener: function addEventListener(type, listener) {
			if (this._listeners === undefined) this._listeners = {};
			var listeners = this._listeners;

			if (listeners[type] === undefined) {
				listeners[type] = [];
			}

			if (listeners[type].indexOf(listener) === -1) {
				listeners[type].push(listener);
			}
		},
		hasEventListener: function hasEventListener(type, listener) {
			if (this._listeners === undefined) return false;
			var listeners = this._listeners;
			return listeners[type] !== undefined && listeners[type].indexOf(listener) !== -1;
		},
		removeEventListener: function removeEventListener(type, listener) {
			if (this._listeners === undefined) return;
			var listeners = this._listeners;
			var listenerArray = listeners[type];

			if (listenerArray !== undefined) {
				var index = listenerArray.indexOf(listener);

				if (index !== -1) {
					listenerArray.splice(index, 1);
				}
			}
		},
		dispatchEvent: function dispatchEvent(event) {
			if (this._listeners === undefined) return;
			var listeners = this._listeners;
			var listenerArray = listeners[event.type];

			if (listenerArray !== undefined) {
				event.target = this; // Make a copy, in case listeners are removed while iterating.

				var array = listenerArray.slice(0);

				for (var i = 0, l = array.length; i < l; i++) {
					array[i].call(this, event);
				}
			}
		}
	});

	var _lut = [];

	for (var i = 0; i < 256; i++) {
		_lut[i] = (i < 16 ? '0' : '') + i.toString(16);
	}

	var _seed = 1234567;
	var MathUtils = {
		DEG2RAD: Math.PI / 180,
		RAD2DEG: 180 / Math.PI,
		generateUUID: function generateUUID() {
			// http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/21963136#21963136
			var d0 = Math.random() * 0xffffffff | 0;
			var d1 = Math.random() * 0xffffffff | 0;
			var d2 = Math.random() * 0xffffffff | 0;
			var d3 = Math.random() * 0xffffffff | 0;
			var uuid = _lut[d0 & 0xff] + _lut[d0 >> 8 & 0xff] + _lut[d0 >> 16 & 0xff] + _lut[d0 >> 24 & 0xff] + '-' + _lut[d1 & 0xff] + _lut[d1 >> 8 & 0xff] + '-' + _lut[d1 >> 16 & 0x0f | 0x40] + _lut[d1 >> 24 & 0xff] + '-' + _lut[d2 & 0x3f | 0x80] + _lut[d2 >> 8 & 0xff] + '-' + _lut[d2 >> 16 & 0xff] + _lut[d2 >> 24 & 0xff] + _lut[d3 & 0xff] + _lut[d3 >> 8 & 0xff] + _lut[d3 >> 16 & 0xff] + _lut[d3 >> 24 & 0xff]; // .toUpperCase() here flattens concatenated strings to save heap memory space.

			return uuid.toUpperCase();
		},
		clamp: function clamp(value, min, max) {
			return Math.max(min, Math.min(max, value));
		},
		// compute euclidian modulo of m % n
		// https://en.wikipedia.org/wiki/Modulo_operation
		euclideanModulo: function euclideanModulo(n, m) {
			return (n % m + m) % m;
		},
		// Linear mapping from range <a1, a2> to range <b1, b2>
		mapLinear: function mapLinear(x, a1, a2, b1, b2) {
			return b1 + (x - a1) * (b2 - b1) / (a2 - a1);
		},
		// https://en.wikipedia.org/wiki/Linear_interpolation
		lerp: function lerp(x, y, t) {
			return (1 - t) * x + t * y;
		},
		// http://www.rorydriscoll.com/2016/03/07/frame-rate-independent-damping-using-lerp/
		damp: function damp(x, y, lambda, dt) {
			return MathUtils.lerp(x, y, 1 - Math.exp(-lambda * dt));
		},
		// https://www.desmos.com/calculator/vcsjnyz7x4
		pingpong: function pingpong(x, length) {
			if (length === void 0) {
				length = 1;
			}

			return length - Math.abs(MathUtils.euclideanModulo(x, length * 2) - length);
		},
		// http://en.wikipedia.org/wiki/Smoothstep
		smoothstep: function smoothstep(x, min, max) {
			if (x <= min) return 0;
			if (x >= max) return 1;
			x = (x - min) / (max - min);
			return x * x * (3 - 2 * x);
		},
		smootherstep: function smootherstep(x, min, max) {
			if (x <= min) return 0;
			if (x >= max) return 1;
			x = (x - min) / (max - min);
			return x * x * x * (x * (x * 6 - 15) + 10);
		},
		// Random integer from <low, high> interval
		randInt: function randInt(low, high) {
			return low + Math.floor(Math.random() * (high - low + 1));
		},
		// Random float from <low, high> interval
		randFloat: function randFloat(low, high) {
			return low + Math.random() * (high - low);
		},
		// Random float from <-range/2, range/2> interval
		randFloatSpread: function randFloatSpread(range) {
			return range * (0.5 - Math.random());
		},
		// Deterministic pseudo-random float in the interval [ 0, 1 ]
		seededRandom: function seededRandom(s) {
			if (s !== undefined) _seed = s % 2147483647; // Park-Miller algorithm

			_seed = _seed * 16807 % 2147483647;
			return (_seed - 1) / 2147483646;
		},
		degToRad: function degToRad(degrees) {
			return degrees * MathUtils.DEG2RAD;
		},
		radToDeg: function radToDeg(radians) {
			return radians * MathUtils.RAD2DEG;
		},
		isPowerOfTwo: function isPowerOfTwo(value) {
			return (value & value - 1) === 0 && value !== 0;
		},
		ceilPowerOfTwo: function ceilPowerOfTwo(value) {
			return Math.pow(2, Math.ceil(Math.log(value) / Math.LN2));
		},
		floorPowerOfTwo: function floorPowerOfTwo(value) {
			return Math.pow(2, Math.floor(Math.log(value) / Math.LN2));
		},
		setQuaternionFromProperEuler: function setQuaternionFromProperEuler(q, a, b, c, order) {
			// Intrinsic Proper Euler Angles - see https://en.wikipedia.org/wiki/Euler_angles
			// rotations are applied to the axes in the order specified by 'order'
			// rotation by angle 'a' is applied first, then by angle 'b', then by angle 'c'
			// angles are in radians
			var cos = Math.cos;
			var sin = Math.sin;
			var c2 = cos(b / 2);
			var s2 = sin(b / 2);
			var c13 = cos((a + c) / 2);
			var s13 = sin((a + c) / 2);
			var c1_3 = cos((a - c) / 2);
			var s1_3 = sin((a - c) / 2);
			var c3_1 = cos((c - a) / 2);
			var s3_1 = sin((c - a) / 2);

			switch (order) {
				case 'XYX':
					q.set(c2 * s13, s2 * c1_3, s2 * s1_3, c2 * c13);
					break;

				case 'YZY':
					q.set(s2 * s1_3, c2 * s13, s2 * c1_3, c2 * c13);
					break;

				case 'ZXZ':
					q.set(s2 * c1_3, s2 * s1_3, c2 * s13, c2 * c13);
					break;

				case 'XZX':
					q.set(c2 * s13, s2 * s3_1, s2 * c3_1, c2 * c13);
					break;

				case 'YXY':
					q.set(s2 * c3_1, c2 * s13, s2 * s3_1, c2 * c13);
					break;

				case 'ZYZ':
					q.set(s2 * s3_1, s2 * c3_1, c2 * s13, c2 * c13);
					break;

				default:
					console.warn('THREE.MathUtils: .setQuaternionFromProperEuler() encountered an unknown order: ' + order);
			}
		}
	};

	var Vector2 = /*#__PURE__*/function () {
		function Vector2(x, y) {
			if (x === void 0) {
				x = 0;
			}

			if (y === void 0) {
				y = 0;
			}

			Object.defineProperty(this, 'isVector2', {
				value: true
			});
			this.x = x;
			this.y = y;
		}

		var _proto = Vector2.prototype;

		_proto.set = function set(x, y) {
			this.x = x;
			this.y = y;
			return this;
		};

		_proto.setScalar = function setScalar(scalar) {
			this.x = scalar;
			this.y = scalar;
			return this;
		};

		_proto.setX = function setX(x) {
			this.x = x;
			return this;
		};

		_proto.setY = function setY(y) {
			this.y = y;
			return this;
		};

		_proto.setComponent = function setComponent(index, value) {
			switch (index) {
				case 0:
					this.x = value;
					break;

				case 1:
					this.y = value;
					break;

				default:
					throw new Error('index is out of range: ' + index);
			}

			return this;
		};

		_proto.getComponent = function getComponent(index) {
			switch (index) {
				case 0:
					return this.x;

				case 1:
					return this.y;

				default:
					throw new Error('index is out of range: ' + index);
			}
		};

		_proto.clone = function clone() {
			return new this.constructor(this.x, this.y);
		};

		_proto.copy = function copy(v) {
			this.x = v.x;
			this.y = v.y;
			return this;
		};

		_proto.add = function add(v, w) {
			if (w !== undefined) {
				console.warn('THREE.Vector2: .add() now only accepts one argument. Use .addVectors( a, b ) instead.');
				return this.addVectors(v, w);
			}

			this.x += v.x;
			this.y += v.y;
			return this;
		};

		_proto.addScalar = function addScalar(s) {
			this.x += s;
			this.y += s;
			return this;
		};

		_proto.addVectors = function addVectors(a, b) {
			this.x = a.x + b.x;
			this.y = a.y + b.y;
			return this;
		};

		_proto.addScaledVector = function addScaledVector(v, s) {
			this.x += v.x * s;
			this.y += v.y * s;
			return this;
		};

		_proto.sub = function sub(v, w) {
			if (w !== undefined) {
				console.warn('THREE.Vector2: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.');
				return this.subVectors(v, w);
			}

			this.x -= v.x;
			this.y -= v.y;
			return this;
		};

		_proto.subScalar = function subScalar(s) {
			this.x -= s;
			this.y -= s;
			return this;
		};

		_proto.subVectors = function subVectors(a, b) {
			this.x = a.x - b.x;
			this.y = a.y - b.y;
			return this;
		};

		_proto.multiply = function multiply(v) {
			this.x *= v.x;
			this.y *= v.y;
			return this;
		};

		_proto.multiplyScalar = function multiplyScalar(scalar) {
			this.x *= scalar;
			this.y *= scalar;
			return this;
		};

		_proto.divide = function divide(v) {
			this.x /= v.x;
			this.y /= v.y;
			return this;
		};

		_proto.divideScalar = function divideScalar(scalar) {
			return this.multiplyScalar(1 / scalar);
		};

		_proto.applyMatrix3 = function applyMatrix3(m) {
			var x = this.x,
					y = this.y;
			var e = m.elements;
			this.x = e[0] * x + e[3] * y + e[6];
			this.y = e[1] * x + e[4] * y + e[7];
			return this;
		};

		_proto.min = function min(v) {
			this.x = Math.min(this.x, v.x);
			this.y = Math.min(this.y, v.y);
			return this;
		};

		_proto.max = function max(v) {
			this.x = Math.max(this.x, v.x);
			this.y = Math.max(this.y, v.y);
			return this;
		};

		_proto.clamp = function clamp(min, max) {
			// assumes min < max, componentwise
			this.x = Math.max(min.x, Math.min(max.x, this.x));
			this.y = Math.max(min.y, Math.min(max.y, this.y));
			return this;
		};

		_proto.clampScalar = function clampScalar(minVal, maxVal) {
			this.x = Math.max(minVal, Math.min(maxVal, this.x));
			this.y = Math.max(minVal, Math.min(maxVal, this.y));
			return this;
		};

		_proto.clampLength = function clampLength(min, max) {
			var length = this.length();
			return this.divideScalar(length || 1).multiplyScalar(Math.max(min, Math.min(max, length)));
		};

		_proto.floor = function floor() {
			this.x = Math.floor(this.x);
			this.y = Math.floor(this.y);
			return this;
		};

		_proto.ceil = function ceil() {
			this.x = Math.ceil(this.x);
			this.y = Math.ceil(this.y);
			return this;
		};

		_proto.round = function round() {
			this.x = Math.round(this.x);
			this.y = Math.round(this.y);
			return this;
		};

		_proto.roundToZero = function roundToZero() {
			this.x = this.x < 0 ? Math.ceil(this.x) : Math.floor(this.x);
			this.y = this.y < 0 ? Math.ceil(this.y) : Math.floor(this.y);
			return this;
		};

		_proto.negate = function negate() {
			this.x = -this.x;
			this.y = -this.y;
			return this;
		};

		_proto.dot = function dot(v) {
			return this.x * v.x + this.y * v.y;
		};

		_proto.cross = function cross(v) {
			return this.x * v.y - this.y * v.x;
		};

		_proto.lengthSq = function lengthSq() {
			return this.x * this.x + this.y * this.y;
		};

		_proto.length = function length() {
			return Math.sqrt(this.x * this.x + this.y * this.y);
		};

		_proto.manhattanLength = function manhattanLength() {
			return Math.abs(this.x) + Math.abs(this.y);
		};

		_proto.normalize = function normalize() {
			return this.divideScalar(this.length() || 1);
		};

		_proto.angle = function angle() {
			// computes the angle in radians with respect to the positive x-axis
			var angle = Math.atan2(-this.y, -this.x) + Math.PI;
			return angle;
		};

		_proto.distanceTo = function distanceTo(v) {
			return Math.sqrt(this.distanceToSquared(v));
		};

		_proto.distanceToSquared = function distanceToSquared(v) {
			var dx = this.x - v.x,
					dy = this.y - v.y;
			return dx * dx + dy * dy;
		};

		_proto.manhattanDistanceTo = function manhattanDistanceTo(v) {
			return Math.abs(this.x - v.x) + Math.abs(this.y - v.y);
		};

		_proto.setLength = function setLength(length) {
			return this.normalize().multiplyScalar(length);
		};

		_proto.lerp = function lerp(v, alpha) {
			this.x += (v.x - this.x) * alpha;
			this.y += (v.y - this.y) * alpha;
			return this;
		};

		_proto.lerpVectors = function lerpVectors(v1, v2, alpha) {
			this.x = v1.x + (v2.x - v1.x) * alpha;
			this.y = v1.y + (v2.y - v1.y) * alpha;
			return this;
		};

		_proto.equals = function equals(v) {
			return v.x === this.x && v.y === this.y;
		};

		_proto.fromArray = function fromArray(array, offset) {
			if (offset === void 0) {
				offset = 0;
			}

			this.x = array[offset];
			this.y = array[offset + 1];
			return this;
		};

		_proto.toArray = function toArray(array, offset) {
			if (array === void 0) {
				array = [];
			}

			if (offset === void 0) {
				offset = 0;
			}

			array[offset] = this.x;
			array[offset + 1] = this.y;
			return array;
		};

		_proto.fromBufferAttribute = function fromBufferAttribute(attribute, index, offset) {
			if (offset !== undefined) {
				console.warn('THREE.Vector2: offset has been removed from .fromBufferAttribute().');
			}

			this.x = attribute.getX(index);
			this.y = attribute.getY(index);
			return this;
		};

		_proto.rotateAround = function rotateAround(center, angle) {
			var c = Math.cos(angle),
					s = Math.sin(angle);
			var x = this.x - center.x;
			var y = this.y - center.y;
			this.x = x * c - y * s + center.x;
			this.y = x * s + y * c + center.y;
			return this;
		};

		_proto.random = function random() {
			this.x = Math.random();
			this.y = Math.random();
			return this;
		};

		_createClass(Vector2, [{
			key: "width",
			get: function get() {
				return this.x;
			},
			set: function set(value) {
				this.x = value;
			}
		}, {
			key: "height",
			get: function get() {
				return this.y;
			},
			set: function set(value) {
				this.y = value;
			}
		}]);

		return Vector2;
	}();

	var Matrix3 = /*#__PURE__*/function () {
		function Matrix3() {
			Object.defineProperty(this, 'isMatrix3', {
				value: true
			});
			this.elements = [1, 0, 0, 0, 1, 0, 0, 0, 1];

			if (arguments.length > 0) {
				console.error('THREE.Matrix3: the constructor no longer reads arguments. use .set() instead.');
			}
		}

		var _proto = Matrix3.prototype;

		_proto.set = function set(n11, n12, n13, n21, n22, n23, n31, n32, n33) {
			var te = this.elements;
			te[0] = n11;
			te[1] = n21;
			te[2] = n31;
			te[3] = n12;
			te[4] = n22;
			te[5] = n32;
			te[6] = n13;
			te[7] = n23;
			te[8] = n33;
			return this;
		};

		_proto.identity = function identity() {
			this.set(1, 0, 0, 0, 1, 0, 0, 0, 1);
			return this;
		};

		_proto.clone = function clone() {
			return new this.constructor().fromArray(this.elements);
		};

		_proto.copy = function copy(m) {
			var te = this.elements;
			var me = m.elements;
			te[0] = me[0];
			te[1] = me[1];
			te[2] = me[2];
			te[3] = me[3];
			te[4] = me[4];
			te[5] = me[5];
			te[6] = me[6];
			te[7] = me[7];
			te[8] = me[8];
			return this;
		};

		_proto.extractBasis = function extractBasis(xAxis, yAxis, zAxis) {
			xAxis.setFromMatrix3Column(this, 0);
			yAxis.setFromMatrix3Column(this, 1);
			zAxis.setFromMatrix3Column(this, 2);
			return this;
		};

		_proto.setFromMatrix4 = function setFromMatrix4(m) {
			var me = m.elements;
			this.set(me[0], me[4], me[8], me[1], me[5], me[9], me[2], me[6], me[10]);
			return this;
		};

		_proto.multiply = function multiply(m) {
			return this.multiplyMatrices(this, m);
		};

		_proto.premultiply = function premultiply(m) {
			return this.multiplyMatrices(m, this);
		};

		_proto.multiplyMatrices = function multiplyMatrices(a, b) {
			var ae = a.elements;
			var be = b.elements;
			var te = this.elements;
			var a11 = ae[0],
					a12 = ae[3],
					a13 = ae[6];
			var a21 = ae[1],
					a22 = ae[4],
					a23 = ae[7];
			var a31 = ae[2],
					a32 = ae[5],
					a33 = ae[8];
			var b11 = be[0],
					b12 = be[3],
					b13 = be[6];
			var b21 = be[1],
					b22 = be[4],
					b23 = be[7];
			var b31 = be[2],
					b32 = be[5],
					b33 = be[8];
			te[0] = a11 * b11 + a12 * b21 + a13 * b31;
			te[3] = a11 * b12 + a12 * b22 + a13 * b32;
			te[6] = a11 * b13 + a12 * b23 + a13 * b33;
			te[1] = a21 * b11 + a22 * b21 + a23 * b31;
			te[4] = a21 * b12 + a22 * b22 + a23 * b32;
			te[7] = a21 * b13 + a22 * b23 + a23 * b33;
			te[2] = a31 * b11 + a32 * b21 + a33 * b31;
			te[5] = a31 * b12 + a32 * b22 + a33 * b32;
			te[8] = a31 * b13 + a32 * b23 + a33 * b33;
			return this;
		};

		_proto.multiplyScalar = function multiplyScalar(s) {
			var te = this.elements;
			te[0] *= s;
			te[3] *= s;
			te[6] *= s;
			te[1] *= s;
			te[4] *= s;
			te[7] *= s;
			te[2] *= s;
			te[5] *= s;
			te[8] *= s;
			return this;
		};

		_proto.determinant = function determinant() {
			var te = this.elements;
			var a = te[0],
					b = te[1],
					c = te[2],
					d = te[3],
					e = te[4],
					f = te[5],
					g = te[6],
					h = te[7],
					i = te[8];
			return a * e * i - a * f * h - b * d * i + b * f * g + c * d * h - c * e * g;
		};

		_proto.invert = function invert() {
			var te = this.elements,
					n11 = te[0],
					n21 = te[1],
					n31 = te[2],
					n12 = te[3],
					n22 = te[4],
					n32 = te[5],
					n13 = te[6],
					n23 = te[7],
					n33 = te[8],
					t11 = n33 * n22 - n32 * n23,
					t12 = n32 * n13 - n33 * n12,
					t13 = n23 * n12 - n22 * n13,
					det = n11 * t11 + n21 * t12 + n31 * t13;
			if (det === 0) return this.set(0, 0, 0, 0, 0, 0, 0, 0, 0);
			var detInv = 1 / det;
			te[0] = t11 * detInv;
			te[1] = (n31 * n23 - n33 * n21) * detInv;
			te[2] = (n32 * n21 - n31 * n22) * detInv;
			te[3] = t12 * detInv;
			te[4] = (n33 * n11 - n31 * n13) * detInv;
			te[5] = (n31 * n12 - n32 * n11) * detInv;
			te[6] = t13 * detInv;
			te[7] = (n21 * n13 - n23 * n11) * detInv;
			te[8] = (n22 * n11 - n21 * n12) * detInv;
			return this;
		};

		_proto.transpose = function transpose() {
			var tmp;
			var m = this.elements;
			tmp = m[1];
			m[1] = m[3];
			m[3] = tmp;
			tmp = m[2];
			m[2] = m[6];
			m[6] = tmp;
			tmp = m[5];
			m[5] = m[7];
			m[7] = tmp;
			return this;
		};

		_proto.getNormalMatrix = function getNormalMatrix(matrix4) {
			return this.setFromMatrix4(matrix4).copy(this).invert().transpose();
		};

		_proto.transposeIntoArray = function transposeIntoArray(r) {
			var m = this.elements;
			r[0] = m[0];
			r[1] = m[3];
			r[2] = m[6];
			r[3] = m[1];
			r[4] = m[4];
			r[5] = m[7];
			r[6] = m[2];
			r[7] = m[5];
			r[8] = m[8];
			return this;
		};

		_proto.setUvTransform = function setUvTransform(tx, ty, sx, sy, rotation, cx, cy) {
			var c = Math.cos(rotation);
			var s = Math.sin(rotation);
			this.set(sx * c, sx * s, -sx * (c * cx + s * cy) + cx + tx, -sy * s, sy * c, -sy * (-s * cx + c * cy) + cy + ty, 0, 0, 1);
			return this;
		};

		_proto.scale = function scale(sx, sy) {
			var te = this.elements;
			te[0] *= sx;
			te[3] *= sx;
			te[6] *= sx;
			te[1] *= sy;
			te[4] *= sy;
			te[7] *= sy;
			return this;
		};

		_proto.rotate = function rotate(theta) {
			var c = Math.cos(theta);
			var s = Math.sin(theta);
			var te = this.elements;
			var a11 = te[0],
					a12 = te[3],
					a13 = te[6];
			var a21 = te[1],
					a22 = te[4],
					a23 = te[7];
			te[0] = c * a11 + s * a21;
			te[3] = c * a12 + s * a22;
			te[6] = c * a13 + s * a23;
			te[1] = -s * a11 + c * a21;
			te[4] = -s * a12 + c * a22;
			te[7] = -s * a13 + c * a23;
			return this;
		};

		_proto.translate = function translate(tx, ty) {
			var te = this.elements;
			te[0] += tx * te[2];
			te[3] += tx * te[5];
			te[6] += tx * te[8];
			te[1] += ty * te[2];
			te[4] += ty * te[5];
			te[7] += ty * te[8];
			return this;
		};

		_proto.equals = function equals(matrix) {
			var te = this.elements;
			var me = matrix.elements;

			for (var i = 0; i < 9; i++) {
				if (te[i] !== me[i]) return false;
			}

			return true;
		};

		_proto.fromArray = function fromArray(array, offset) {
			if (offset === void 0) {
				offset = 0;
			}

			for (var i = 0; i < 9; i++) {
				this.elements[i] = array[i + offset];
			}

			return this;
		};

		_proto.toArray = function toArray(array, offset) {
			if (array === void 0) {
				array = [];
			}

			if (offset === void 0) {
				offset = 0;
			}

			var te = this.elements;
			array[offset] = te[0];
			array[offset + 1] = te[1];
			array[offset + 2] = te[2];
			array[offset + 3] = te[3];
			array[offset + 4] = te[4];
			array[offset + 5] = te[5];
			array[offset + 6] = te[6];
			array[offset + 7] = te[7];
			array[offset + 8] = te[8];
			return array;
		};

		return Matrix3;
	}();

	var _canvas;

	var ImageUtils = {
		getDataURL: function getDataURL(image) {
			if (/^data:/i.test(image.src)) {
				return image.src;
			}

			if (typeof HTMLCanvasElement == 'undefined') {
				return image.src;
			}

			var canvas;

			if (image instanceof HTMLCanvasElement) {
				canvas = image;
			} else {
				if (_canvas === undefined) _canvas = document.createElementNS('http://www.w3.org/1999/xhtml', 'canvas');
				_canvas.width = image.width;
				_canvas.height = image.height;

				var context = _canvas.getContext('2d');

				if (image instanceof ImageData) {
					context.putImageData(image, 0, 0);
				} else {
					context.drawImage(image, 0, 0, image.width, image.height);
				}

				canvas = _canvas;
			}

			if (canvas.width > 2048 || canvas.height > 2048) {
				return canvas.toDataURL('image/jpeg', 0.6);
			} else {
				return canvas.toDataURL('image/png');
			}
		}
	};

	var textureId = 0;

	function Texture(image, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding) {
		if (image === void 0) {
			image = Texture.DEFAULT_IMAGE;
		}

		if (mapping === void 0) {
			mapping = Texture.DEFAULT_MAPPING;
		}

		if (wrapS === void 0) {
			wrapS = ClampToEdgeWrapping;
		}

		if (wrapT === void 0) {
			wrapT = ClampToEdgeWrapping;
		}

		if (magFilter === void 0) {
			magFilter = LinearFilter;
		}

		if (minFilter === void 0) {
			minFilter = LinearMipmapLinearFilter;
		}

		if (format === void 0) {
			format = RGBAFormat;
		}

		if (type === void 0) {
			type = UnsignedByteType;
		}

		if (anisotropy === void 0) {
			anisotropy = 1;
		}

		if (encoding === void 0) {
			encoding = LinearEncoding;
		}

		Object.defineProperty(this, 'id', {
			value: textureId++
		});
		this.uuid = MathUtils.generateUUID();
		this.name = '';
		this.image = image;
		this.mipmaps = [];
		this.mapping = mapping;
		this.wrapS = wrapS;
		this.wrapT = wrapT;
		this.magFilter = magFilter;
		this.minFilter = minFilter;
		this.anisotropy = anisotropy;
		this.format = format;
		this.internalFormat = null;
		this.type = type;
		this.offset = new Vector2(0, 0);
		this.repeat = new Vector2(1, 1);
		this.center = new Vector2(0, 0);
		this.rotation = 0;
		this.matrixAutoUpdate = true;
		this.matrix = new Matrix3();
		this.generateMipmaps = true;
		this.premultiplyAlpha = false;
		this.flipY = true;
		this.unpackAlignment = 4; // valid values: 1, 2, 4, 8 (see http://www.khronos.org/opengles/sdk/docs/man/xhtml/glPixelStorei.xml)
		// Values of encoding !== THREE.LinearEncoding only supported on map, envMap and emissiveMap.
		//
		// Also changing the encoding after already used by a Material will not automatically make the Material
		// update. You need to explicitly call Material.needsUpdate to trigger it to recompile.

		this.encoding = encoding;
		this.version = 0;
		this.onUpdate = null;
	}

	Texture.DEFAULT_IMAGE = undefined;
	Texture.DEFAULT_MAPPING = UVMapping;
	Texture.prototype = Object.assign(Object.create(EventDispatcher.prototype), {
		constructor: Texture,
		isTexture: true,
		updateMatrix: function updateMatrix() {
			this.matrix.setUvTransform(this.offset.x, this.offset.y, this.repeat.x, this.repeat.y, this.rotation, this.center.x, this.center.y);
		},
		clone: function clone() {
			return new this.constructor().copy(this);
		},
		copy: function copy(source) {
			this.name = source.name;
			this.image = source.image;
			this.mipmaps = source.mipmaps.slice(0);
			this.mapping = source.mapping;
			this.wrapS = source.wrapS;
			this.wrapT = source.wrapT;
			this.magFilter = source.magFilter;
			this.minFilter = source.minFilter;
			this.anisotropy = source.anisotropy;
			this.format = source.format;
			this.internalFormat = source.internalFormat;
			this.type = source.type;
			this.offset.copy(source.offset);
			this.repeat.copy(source.repeat);
			this.center.copy(source.center);
			this.rotation = source.rotation;
			this.matrixAutoUpdate = source.matrixAutoUpdate;
			this.matrix.copy(source.matrix);
			this.generateMipmaps = source.generateMipmaps;
			this.premultiplyAlpha = source.premultiplyAlpha;
			this.flipY = source.flipY;
			this.unpackAlignment = source.unpackAlignment;
			this.encoding = source.encoding;
			return this;
		},
		toJSON: function toJSON(meta) {
			var isRootObject = meta === undefined || typeof meta === 'string';

			if (!isRootObject && meta.textures[this.uuid] !== undefined) {
				return meta.textures[this.uuid];
			}

			var output = {
				metadata: {
					version: 4.5,
					type: 'Texture',
					generator: 'Texture.toJSON'
				},
				uuid: this.uuid,
				name: this.name,
				mapping: this.mapping,
				repeat: [this.repeat.x, this.repeat.y],
				offset: [this.offset.x, this.offset.y],
				center: [this.center.x, this.center.y],
				rotation: this.rotation,
				wrap: [this.wrapS, this.wrapT],
				format: this.format,
				type: this.type,
				encoding: this.encoding,
				minFilter: this.minFilter,
				magFilter: this.magFilter,
				anisotropy: this.anisotropy,
				flipY: this.flipY,
				premultiplyAlpha: this.premultiplyAlpha,
				unpackAlignment: this.unpackAlignment
			};

			if (this.image !== undefined) {
				// TODO: Move to THREE.Image
				var image = this.image;

				if (image.uuid === undefined) {
					image.uuid = MathUtils.generateUUID(); // UGH
				}

				if (!isRootObject && meta.images[image.uuid] === undefined) {
					var url;

					if (Array.isArray(image)) {
						// process array of images e.g. CubeTexture
						url = [];

						for (var i = 0, l = image.length; i < l; i++) {
							// check cube texture with data textures
							if (image[i].isDataTexture) {
								url.push(serializeImage(image[i].image));
							} else {
								url.push(serializeImage(image[i]));
							}
						}
					} else {
						// process single image
						url = serializeImage(image);
					}

					meta.images[image.uuid] = {
						uuid: image.uuid,
						url: url
					};
				}

				output.image = image.uuid;
			}

			if (!isRootObject) {
				meta.textures[this.uuid] = output;
			}

			return output;
		},
		dispose: function dispose() {
			this.dispatchEvent({
				type: 'dispose'
			});
		},
		transformUv: function transformUv(uv) {
			if (this.mapping !== UVMapping) return uv;
			uv.applyMatrix3(this.matrix);

			if (uv.x < 0 || uv.x > 1) {
				switch (this.wrapS) {
					case RepeatWrapping:
						uv.x = uv.x - Math.floor(uv.x);
						break;

					case ClampToEdgeWrapping:
						uv.x = uv.x < 0 ? 0 : 1;
						break;

					case MirroredRepeatWrapping:
						if (Math.abs(Math.floor(uv.x) % 2) === 1) {
							uv.x = Math.ceil(uv.x) - uv.x;
						} else {
							uv.x = uv.x - Math.floor(uv.x);
						}

						break;
				}
			}

			if (uv.y < 0 || uv.y > 1) {
				switch (this.wrapT) {
					case RepeatWrapping:
						uv.y = uv.y - Math.floor(uv.y);
						break;

					case ClampToEdgeWrapping:
						uv.y = uv.y < 0 ? 0 : 1;
						break;

					case MirroredRepeatWrapping:
						if (Math.abs(Math.floor(uv.y) % 2) === 1) {
							uv.y = Math.ceil(uv.y) - uv.y;
						} else {
							uv.y = uv.y - Math.floor(uv.y);
						}

						break;
				}
			}

			if (this.flipY) {
				uv.y = 1 - uv.y;
			}

			return uv;
		}
	});
	Object.defineProperty(Texture.prototype, 'needsUpdate', {
		set: function set(value) {
			if (value === true) this.version++;
		}
	});

	function serializeImage(image) {
		if (typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement || typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement || typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap) {
			// default images
			return ImageUtils.getDataURL(image);
		} else {
			if (image.data) {
				// images of DataTexture
				return {
					data: Array.prototype.slice.call(image.data),
					width: image.width,
					height: image.height,
					type: image.data.constructor.name
				};
			} else {
				console.warn('THREE.Texture: Unable to serialize Texture.');
				return {};
			}
		}
	}

	var Vector4 = /*#__PURE__*/function () {
		function Vector4(x, y, z, w) {
			if (x === void 0) {
				x = 0;
			}

			if (y === void 0) {
				y = 0;
			}

			if (z === void 0) {
				z = 0;
			}

			if (w === void 0) {
				w = 1;
			}

			Object.defineProperty(this, 'isVector4', {
				value: true
			});
			this.x = x;
			this.y = y;
			this.z = z;
			this.w = w;
		}

		var _proto = Vector4.prototype;

		_proto.set = function set(x, y, z, w) {
			this.x = x;
			this.y = y;
			this.z = z;
			this.w = w;
			return this;
		};

		_proto.setScalar = function setScalar(scalar) {
			this.x = scalar;
			this.y = scalar;
			this.z = scalar;
			this.w = scalar;
			return this;
		};

		_proto.setX = function setX(x) {
			this.x = x;
			return this;
		};

		_proto.setY = function setY(y) {
			this.y = y;
			return this;
		};

		_proto.setZ = function setZ(z) {
			this.z = z;
			return this;
		};

		_proto.setW = function setW(w) {
			this.w = w;
			return this;
		};

		_proto.setComponent = function setComponent(index, value) {
			switch (index) {
				case 0:
					this.x = value;
					break;

				case 1:
					this.y = value;
					break;

				case 2:
					this.z = value;
					break;

				case 3:
					this.w = value;
					break;

				default:
					throw new Error('index is out of range: ' + index);
			}

			return this;
		};

		_proto.getComponent = function getComponent(index) {
			switch (index) {
				case 0:
					return this.x;

				case 1:
					return this.y;

				case 2:
					return this.z;

				case 3:
					return this.w;

				default:
					throw new Error('index is out of range: ' + index);
			}
		};

		_proto.clone = function clone() {
			return new this.constructor(this.x, this.y, this.z, this.w);
		};

		_proto.copy = function copy(v) {
			this.x = v.x;
			this.y = v.y;
			this.z = v.z;
			this.w = v.w !== undefined ? v.w : 1;
			return this;
		};

		_proto.add = function add(v, w) {
			if (w !== undefined) {
				console.warn('THREE.Vector4: .add() now only accepts one argument. Use .addVectors( a, b ) instead.');
				return this.addVectors(v, w);
			}

			this.x += v.x;
			this.y += v.y;
			this.z += v.z;
			this.w += v.w;
			return this;
		};

		_proto.addScalar = function addScalar(s) {
			this.x += s;
			this.y += s;
			this.z += s;
			this.w += s;
			return this;
		};

		_proto.addVectors = function addVectors(a, b) {
			this.x = a.x + b.x;
			this.y = a.y + b.y;
			this.z = a.z + b.z;
			this.w = a.w + b.w;
			return this;
		};

		_proto.addScaledVector = function addScaledVector(v, s) {
			this.x += v.x * s;
			this.y += v.y * s;
			this.z += v.z * s;
			this.w += v.w * s;
			return this;
		};

		_proto.sub = function sub(v, w) {
			if (w !== undefined) {
				console.warn('THREE.Vector4: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.');
				return this.subVectors(v, w);
			}

			this.x -= v.x;
			this.y -= v.y;
			this.z -= v.z;
			this.w -= v.w;
			return this;
		};

		_proto.subScalar = function subScalar(s) {
			this.x -= s;
			this.y -= s;
			this.z -= s;
			this.w -= s;
			return this;
		};

		_proto.subVectors = function subVectors(a, b) {
			this.x = a.x - b.x;
			this.y = a.y - b.y;
			this.z = a.z - b.z;
			this.w = a.w - b.w;
			return this;
		};

		_proto.multiply = function multiply(v) {
			this.x *= v.x;
			this.y *= v.y;
			this.z *= v.z;
			this.w *= v.w;
			return this;
		};

		_proto.multiplyScalar = function multiplyScalar(scalar) {
			this.x *= scalar;
			this.y *= scalar;
			this.z *= scalar;
			this.w *= scalar;
			return this;
		};

		_proto.applyMatrix4 = function applyMatrix4(m) {
			var x = this.x,
					y = this.y,
					z = this.z,
					w = this.w;
			var e = m.elements;
			this.x = e[0] * x + e[4] * y + e[8] * z + e[12] * w;
			this.y = e[1] * x + e[5] * y + e[9] * z + e[13] * w;
			this.z = e[2] * x + e[6] * y + e[10] * z + e[14] * w;
			this.w = e[3] * x + e[7] * y + e[11] * z + e[15] * w;
			return this;
		};

		_proto.divideScalar = function divideScalar(scalar) {
			return this.multiplyScalar(1 / scalar);
		};

		_proto.setAxisAngleFromQuaternion = function setAxisAngleFromQuaternion(q) {
			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToAngle/index.htm
			// q is assumed to be normalized
			this.w = 2 * Math.acos(q.w);
			var s = Math.sqrt(1 - q.w * q.w);

			if (s < 0.0001) {
				this.x = 1;
				this.y = 0;
				this.z = 0;
			} else {
				this.x = q.x / s;
				this.y = q.y / s;
				this.z = q.z / s;
			}

			return this;
		};

		_proto.setAxisAngleFromRotationMatrix = function setAxisAngleFromRotationMatrix(m) {
			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToAngle/index.htm
			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)
			var angle, x, y, z; // variables for result

			var epsilon = 0.01,
					// margin to allow for rounding errors
			epsilon2 = 0.1,
					// margin to distinguish between 0 and 180 degrees
			te = m.elements,
					m11 = te[0],
					m12 = te[4],
					m13 = te[8],
					m21 = te[1],
					m22 = te[5],
					m23 = te[9],
					m31 = te[2],
					m32 = te[6],
					m33 = te[10];

			if (Math.abs(m12 - m21) < epsilon && Math.abs(m13 - m31) < epsilon && Math.abs(m23 - m32) < epsilon) {
				// singularity found
				// first check for identity matrix which must have +1 for all terms
				// in leading diagonal and zero in other terms
				if (Math.abs(m12 + m21) < epsilon2 && Math.abs(m13 + m31) < epsilon2 && Math.abs(m23 + m32) < epsilon2 && Math.abs(m11 + m22 + m33 - 3) < epsilon2) {
					// this singularity is identity matrix so angle = 0
					this.set(1, 0, 0, 0);
					return this; // zero angle, arbitrary axis
				} // otherwise this singularity is angle = 180


				angle = Math.PI;
				var xx = (m11 + 1) / 2;
				var yy = (m22 + 1) / 2;
				var zz = (m33 + 1) / 2;
				var xy = (m12 + m21) / 4;
				var xz = (m13 + m31) / 4;
				var yz = (m23 + m32) / 4;

				if (xx > yy && xx > zz) {
					// m11 is the largest diagonal term
					if (xx < epsilon) {
						x = 0;
						y = 0.707106781;
						z = 0.707106781;
					} else {
						x = Math.sqrt(xx);
						y = xy / x;
						z = xz / x;
					}
				} else if (yy > zz) {
					// m22 is the largest diagonal term
					if (yy < epsilon) {
						x = 0.707106781;
						y = 0;
						z = 0.707106781;
					} else {
						y = Math.sqrt(yy);
						x = xy / y;
						z = yz / y;
					}
				} else {
					// m33 is the largest diagonal term so base result on this
					if (zz < epsilon) {
						x = 0.707106781;
						y = 0.707106781;
						z = 0;
					} else {
						z = Math.sqrt(zz);
						x = xz / z;
						y = yz / z;
					}
				}

				this.set(x, y, z, angle);
				return this; // return 180 deg rotation
			} // as we have reached here there are no singularities so we can handle normally


			var s = Math.sqrt((m32 - m23) * (m32 - m23) + (m13 - m31) * (m13 - m31) + (m21 - m12) * (m21 - m12)); // used to normalize

			if (Math.abs(s) < 0.001) s = 1; // prevent divide by zero, should not happen if matrix is orthogonal and should be
			// caught by singularity test above, but I've left it in just in case

			this.x = (m32 - m23) / s;
			this.y = (m13 - m31) / s;
			this.z = (m21 - m12) / s;
			this.w = Math.acos((m11 + m22 + m33 - 1) / 2);
			return this;
		};

		_proto.min = function min(v) {
			this.x = Math.min(this.x, v.x);
			this.y = Math.min(this.y, v.y);
			this.z = Math.min(this.z, v.z);
			this.w = Math.min(this.w, v.w);
			return this;
		};

		_proto.max = function max(v) {
			this.x = Math.max(this.x, v.x);
			this.y = Math.max(this.y, v.y);
			this.z = Math.max(this.z, v.z);
			this.w = Math.max(this.w, v.w);
			return this;
		};

		_proto.clamp = function clamp(min, max) {
			// assumes min < max, componentwise
			this.x = Math.max(min.x, Math.min(max.x, this.x));
			this.y = Math.max(min.y, Math.min(max.y, this.y));
			this.z = Math.max(min.z, Math.min(max.z, this.z));
			this.w = Math.max(min.w, Math.min(max.w, this.w));
			return this;
		};

		_proto.clampScalar = function clampScalar(minVal, maxVal) {
			this.x = Math.max(minVal, Math.min(maxVal, this.x));
			this.y = Math.max(minVal, Math.min(maxVal, this.y));
			this.z = Math.max(minVal, Math.min(maxVal, this.z));
			this.w = Math.max(minVal, Math.min(maxVal, this.w));
			return this;
		};

		_proto.clampLength = function clampLength(min, max) {
			var length = this.length();
			return this.divideScalar(length || 1).multiplyScalar(Math.max(min, Math.min(max, length)));
		};

		_proto.floor = function floor() {
			this.x = Math.floor(this.x);
			this.y = Math.floor(this.y);
			this.z = Math.floor(this.z);
			this.w = Math.floor(this.w);
			return this;
		};

		_proto.ceil = function ceil() {
			this.x = Math.ceil(this.x);
			this.y = Math.ceil(this.y);
			this.z = Math.ceil(this.z);
			this.w = Math.ceil(this.w);
			return this;
		};

		_proto.round = function round() {
			this.x = Math.round(this.x);
			this.y = Math.round(this.y);
			this.z = Math.round(this.z);
			this.w = Math.round(this.w);
			return this;
		};

		_proto.roundToZero = function roundToZero() {
			this.x = this.x < 0 ? Math.ceil(this.x) : Math.floor(this.x);
			this.y = this.y < 0 ? Math.ceil(this.y) : Math.floor(this.y);
			this.z = this.z < 0 ? Math.ceil(this.z) : Math.floor(this.z);
			this.w = this.w < 0 ? Math.ceil(this.w) : Math.floor(this.w);
			return this;
		};

		_proto.negate = function negate() {
			this.x = -this.x;
			this.y = -this.y;
			this.z = -this.z;
			this.w = -this.w;
			return this;
		};

		_proto.dot = function dot(v) {
			return this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.w;
		};

		_proto.lengthSq = function lengthSq() {
			return this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w;
		};

		_proto.length = function length() {
			return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w);
		};

		_proto.manhattanLength = function manhattanLength() {
			return Math.abs(this.x) + Math.abs(this.y) + Math.abs(this.z) + Math.abs(this.w);
		};

		_proto.normalize = function normalize() {
			return this.divideScalar(this.length() || 1);
		};

		_proto.setLength = function setLength(length) {
			return this.normalize().multiplyScalar(length);
		};

		_proto.lerp = function lerp(v, alpha) {
			this.x += (v.x - this.x) * alpha;
			this.y += (v.y - this.y) * alpha;
			this.z += (v.z - this.z) * alpha;
			this.w += (v.w - this.w) * alpha;
			return this;
		};

		_proto.lerpVectors = function lerpVectors(v1, v2, alpha) {
			this.x = v1.x + (v2.x - v1.x) * alpha;
			this.y = v1.y + (v2.y - v1.y) * alpha;
			this.z = v1.z + (v2.z - v1.z) * alpha;
			this.w = v1.w + (v2.w - v1.w) * alpha;
			return this;
		};

		_proto.equals = function equals(v) {
			return v.x === this.x && v.y === this.y && v.z === this.z && v.w === this.w;
		};

		_proto.fromArray = function fromArray(array, offset) {
			if (offset === void 0) {
				offset = 0;
			}

			this.x = array[offset];
			this.y = array[offset + 1];
			this.z = array[offset + 2];
			this.w = array[offset + 3];
			return this;
		};

		_proto.toArray = function toArray(array, offset) {
			if (array === void 0) {
				array = [];
			}

			if (offset === void 0) {
				offset = 0;
			}

			array[offset] = this.x;
			array[offset + 1] = this.y;
			array[offset + 2] = this.z;
			array[offset + 3] = this.w;
			return array;
		};

		_proto.fromBufferAttribute = function fromBufferAttribute(attribute, index, offset) {
			if (offset !== undefined) {
				console.warn('THREE.Vector4: offset has been removed from .fromBufferAttribute().');
			}

			this.x = attribute.getX(index);
			this.y = attribute.getY(index);
			this.z = attribute.getZ(index);
			this.w = attribute.getW(index);
			return this;
		};

		_proto.random = function random() {
			this.x = Math.random();
			this.y = Math.random();
			this.z = Math.random();
			this.w = Math.random();
			return this;
		};

		_createClass(Vector4, [{
			key: "width",
			get: function get() {
				return this.z;
			},
			set: function set(value) {
				this.z = value;
			}
		}, {
			key: "height",
			get: function get() {
				return this.w;
			},
			set: function set(value) {
				this.w = value;
			}
		}]);

		return Vector4;
	}();

	/*
	 In options, we can specify:
	 * Texture parameters for an auto-generated target texture
	 * depthBuffer/stencilBuffer: Booleans to indicate if we should generate these buffers
	*/

	var WebGLRenderTarget = /*#__PURE__*/function (_EventDispatcher) {
		_inheritsLoose(WebGLRenderTarget, _EventDispatcher);

		function WebGLRenderTarget(width, height, options) {
			var _this;

			_this = _EventDispatcher.call(this) || this;
			Object.defineProperty(_assertThisInitialized(_this), 'isWebGLRenderTarget', {
				value: true
			});
			_this.width = width;
			_this.height = height;
			_this.scissor = new Vector4(0, 0, width, height);
			_this.scissorTest = false;
			_this.viewport = new Vector4(0, 0, width, height);
			options = options || {};
			_this.texture = new Texture(undefined, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding);
			_this.texture.image = {};
			_this.texture.image.width = width;
			_this.texture.image.height = height;
			_this.texture.generateMipmaps = options.generateMipmaps !== undefined ? options.generateMipmaps : false;
			_this.texture.minFilter = options.minFilter !== undefined ? options.minFilter : LinearFilter;
			_this.depthBuffer = options.depthBuffer !== undefined ? options.depthBuffer : true;
			_this.stencilBuffer = options.stencilBuffer !== undefined ? options.stencilBuffer : false;
			_this.depthTexture = options.depthTexture !== undefined ? options.depthTexture : null;
			return _this;
		}

		var _proto = WebGLRenderTarget.prototype;

		_proto.setSize = function setSize(width, height) {
			if (this.width !== width || this.height !== height) {
				this.width = width;
				this.height = height;
				this.texture.image.width = width;
				this.texture.image.height = height;
				this.dispose();
			}

			this.viewport.set(0, 0, width, height);
			this.scissor.set(0, 0, width, height);
		};

		_proto.clone = function clone() {
			return new this.constructor().copy(this);
		};

		_proto.copy = function copy(source) {
			this.width = source.width;
			this.height = source.height;
			this.viewport.copy(source.viewport);
			this.texture = source.texture.clone();
			this.depthBuffer = source.depthBuffer;
			this.stencilBuffer = source.stencilBuffer;
			this.depthTexture = source.depthTexture;
			return this;
		};

		_proto.dispose = function dispose() {
			this.dispatchEvent({
				type: 'dispose'
			});
		};

		return WebGLRenderTarget;
	}(EventDispatcher);

	var WebGLMultisampleRenderTarget = /*#__PURE__*/function (_WebGLRenderTarget) {
		_inheritsLoose(WebGLMultisampleRenderTarget, _WebGLRenderTarget);

		function WebGLMultisampleRenderTarget(width, height, options) {
			var _this;

			_this = _WebGLRenderTarget.call(this, width, height, options) || this;
			Object.defineProperty(_assertThisInitialized(_this), 'isWebGLMultisampleRenderTarget', {
				value: true
			});
			_this.samples = 4;
			return _this;
		}

		var _proto = WebGLMultisampleRenderTarget.prototype;

		_proto.copy = function copy(source) {
			_WebGLRenderTarget.prototype.copy.call(this, source);

			this.samples = source.samples;
			return this;
		};

		return WebGLMultisampleRenderTarget;
	}(WebGLRenderTarget);

	var Quaternion = /*#__PURE__*/function () {
		function Quaternion(x, y, z, w) {
			if (x === void 0) {
				x = 0;
			}

			if (y === void 0) {
				y = 0;
			}

			if (z === void 0) {
				z = 0;
			}

			if (w === void 0) {
				w = 1;
			}

			Object.defineProperty(this, 'isQuaternion', {
				value: true
			});
			this._x = x;
			this._y = y;
			this._z = z;
			this._w = w;
		}

		Quaternion.slerp = function slerp(qa, qb, qm, t) {
			return qm.copy(qa).slerp(qb, t);
		};

		Quaternion.slerpFlat = function slerpFlat(dst, dstOffset, src0, srcOffset0, src1, srcOffset1, t) {
			// fuzz-free, array-based Quaternion SLERP operation
			var x0 = src0[srcOffset0 + 0],
					y0 = src0[srcOffset0 + 1],
					z0 = src0[srcOffset0 + 2],
					w0 = src0[srcOffset0 + 3];
			var x1 = src1[srcOffset1 + 0],
					y1 = src1[srcOffset1 + 1],
					z1 = src1[srcOffset1 + 2],
					w1 = src1[srcOffset1 + 3];

			if (w0 !== w1 || x0 !== x1 || y0 !== y1 || z0 !== z1) {
				var s = 1 - t;
				var cos = x0 * x1 + y0 * y1 + z0 * z1 + w0 * w1,
						dir = cos >= 0 ? 1 : -1,
						sqrSin = 1 - cos * cos; // Skip the Slerp for tiny steps to avoid numeric problems:

				if (sqrSin > Number.EPSILON) {
					var sin = Math.sqrt(sqrSin),
							len = Math.atan2(sin, cos * dir);
					s = Math.sin(s * len) / sin;
					t = Math.sin(t * len) / sin;
				}

				var tDir = t * dir;
				x0 = x0 * s + x1 * tDir;
				y0 = y0 * s + y1 * tDir;
				z0 = z0 * s + z1 * tDir;
				w0 = w0 * s + w1 * tDir; // Normalize in case we just did a lerp:

				if (s === 1 - t) {
					var f = 1 / Math.sqrt(x0 * x0 + y0 * y0 + z0 * z0 + w0 * w0);
					x0 *= f;
					y0 *= f;
					z0 *= f;
					w0 *= f;
				}
			}

			dst[dstOffset] = x0;
			dst[dstOffset + 1] = y0;
			dst[dstOffset + 2] = z0;
			dst[dstOffset + 3] = w0;
		};

		Quaternion.multiplyQuaternionsFlat = function multiplyQuaternionsFlat(dst, dstOffset, src0, srcOffset0, src1, srcOffset1) {
			var x0 = src0[srcOffset0];
			var y0 = src0[srcOffset0 + 1];
			var z0 = src0[srcOffset0 + 2];
			var w0 = src0[srcOffset0 + 3];
			var x1 = src1[srcOffset1];
			var y1 = src1[srcOffset1 + 1];
			var z1 = src1[srcOffset1 + 2];
			var w1 = src1[srcOffset1 + 3];
			dst[dstOffset] = x0 * w1 + w0 * x1 + y0 * z1 - z0 * y1;
			dst[dstOffset + 1] = y0 * w1 + w0 * y1 + z0 * x1 - x0 * z1;
			dst[dstOffset + 2] = z0 * w1 + w0 * z1 + x0 * y1 - y0 * x1;
			dst[dstOffset + 3] = w0 * w1 - x0 * x1 - y0 * y1 - z0 * z1;
			return dst;
		};

		var _proto = Quaternion.prototype;

		_proto.set = function set(x, y, z, w) {
			this._x = x;
			this._y = y;
			this._z = z;
			this._w = w;

			this._onChangeCallback();

			return this;
		};

		_proto.clone = function clone() {
			return new this.constructor(this._x, this._y, this._z, this._w);
		};

		_proto.copy = function copy(quaternion) {
			this._x = quaternion.x;
			this._y = quaternion.y;
			this._z = quaternion.z;
			this._w = quaternion.w;

			this._onChangeCallback();

			return this;
		};

		_proto.setFromEuler = function setFromEuler(euler, update) {
			if (!(euler && euler.isEuler)) {
				throw new Error('THREE.Quaternion: .setFromEuler() now expects an Euler rotation rather than a Vector3 and order.');
			}

			var x = euler._x,
					y = euler._y,
					z = euler._z,
					order = euler._order; // http://www.mathworks.com/matlabcentral/fileexchange/
			// 	20696-function-to-convert-between-dcm-euler-angles-quaternions-and-euler-vectors/
			//	content/SpinCalc.m

			var cos = Math.cos;
			var sin = Math.sin;
			var c1 = cos(x / 2);
			var c2 = cos(y / 2);
			var c3 = cos(z / 2);
			var s1 = sin(x / 2);
			var s2 = sin(y / 2);
			var s3 = sin(z / 2);

			switch (order) {
				case 'XYZ':
					this._x = s1 * c2 * c3 + c1 * s2 * s3;
					this._y = c1 * s2 * c3 - s1 * c2 * s3;
					this._z = c1 * c2 * s3 + s1 * s2 * c3;
					this._w = c1 * c2 * c3 - s1 * s2 * s3;
					break;

				case 'YXZ':
					this._x = s1 * c2 * c3 + c1 * s2 * s3;
					this._y = c1 * s2 * c3 - s1 * c2 * s3;
					this._z = c1 * c2 * s3 - s1 * s2 * c3;
					this._w = c1 * c2 * c3 + s1 * s2 * s3;
					break;

				case 'ZXY':
					this._x = s1 * c2 * c3 - c1 * s2 * s3;
					this._y = c1 * s2 * c3 + s1 * c2 * s3;
					this._z = c1 * c2 * s3 + s1 * s2 * c3;
					this._w = c1 * c2 * c3 - s1 * s2 * s3;
					break;

				case 'ZYX':
					this._x = s1 * c2 * c3 - c1 * s2 * s3;
					this._y = c1 * s2 * c3 + s1 * c2 * s3;
					this._z = c1 * c2 * s3 - s1 * s2 * c3;
					this._w = c1 * c2 * c3 + s1 * s2 * s3;
					break;

				case 'YZX':
					this._x = s1 * c2 * c3 + c1 * s2 * s3;
					this._y = c1 * s2 * c3 + s1 * c2 * s3;
					this._z = c1 * c2 * s3 - s1 * s2 * c3;
					this._w = c1 * c2 * c3 - s1 * s2 * s3;
					break;

				case 'XZY':
					this._x = s1 * c2 * c3 - c1 * s2 * s3;
					this._y = c1 * s2 * c3 - s1 * c2 * s3;
					this._z = c1 * c2 * s3 + s1 * s2 * c3;
					this._w = c1 * c2 * c3 + s1 * s2 * s3;
					break;

				default:
					console.warn('THREE.Quaternion: .setFromEuler() encountered an unknown order: ' + order);
			}

			if (update !== false) this._onChangeCallback();
			return this;
		};

		_proto.setFromAxisAngle = function setFromAxisAngle(axis, angle) {
			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/angleToQuaternion/index.htm
			// assumes axis is normalized
			var halfAngle = angle / 2,
					s = Math.sin(halfAngle);
			this._x = axis.x * s;
			this._y = axis.y * s;
			this._z = axis.z * s;
			this._w = Math.cos(halfAngle);

			this._onChangeCallback();

			return this;
		};

		_proto.setFromRotationMatrix = function setFromRotationMatrix(m) {
			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm
			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)
			var te = m.elements,
					m11 = te[0],
					m12 = te[4],
					m13 = te[8],
					m21 = te[1],
					m22 = te[5],
					m23 = te[9],
					m31 = te[2],
					m32 = te[6],
					m33 = te[10],
					trace = m11 + m22 + m33;

			if (trace > 0) {
				var s = 0.5 / Math.sqrt(trace + 1.0);
				this._w = 0.25 / s;
				this._x = (m32 - m23) * s;
				this._y = (m13 - m31) * s;
				this._z = (m21 - m12) * s;
			} else if (m11 > m22 && m11 > m33) {
				var _s = 2.0 * Math.sqrt(1.0 + m11 - m22 - m33);

				this._w = (m32 - m23) / _s;
				this._x = 0.25 * _s;
				this._y = (m12 + m21) / _s;
				this._z = (m13 + m31) / _s;
			} else if (m22 > m33) {
				var _s2 = 2.0 * Math.sqrt(1.0 + m22 - m11 - m33);

				this._w = (m13 - m31) / _s2;
				this._x = (m12 + m21) / _s2;
				this._y = 0.25 * _s2;
				this._z = (m23 + m32) / _s2;
			} else {
				var _s3 = 2.0 * Math.sqrt(1.0 + m33 - m11 - m22);

				this._w = (m21 - m12) / _s3;
				this._x = (m13 + m31) / _s3;
				this._y = (m23 + m32) / _s3;
				this._z = 0.25 * _s3;
			}

			this._onChangeCallback();

			return this;
		};

		_proto.setFromUnitVectors = function setFromUnitVectors(vFrom, vTo) {
			// assumes direction vectors vFrom and vTo are normalized
			var EPS = 0.000001;
			var r = vFrom.dot(vTo) + 1;

			if (r < EPS) {
				r = 0;

				if (Math.abs(vFrom.x) > Math.abs(vFrom.z)) {
					this._x = -vFrom.y;
					this._y = vFrom.x;
					this._z = 0;
					this._w = r;
				} else {
					this._x = 0;
					this._y = -vFrom.z;
					this._z = vFrom.y;
					this._w = r;
				}
			} else {
				// crossVectors( vFrom, vTo ); // inlined to avoid cyclic dependency on Vector3
				this._x = vFrom.y * vTo.z - vFrom.z * vTo.y;
				this._y = vFrom.z * vTo.x - vFrom.x * vTo.z;
				this._z = vFrom.x * vTo.y - vFrom.y * vTo.x;
				this._w = r;
			}

			return this.normalize();
		};

		_proto.angleTo = function angleTo(q) {
			return 2 * Math.acos(Math.abs(MathUtils.clamp(this.dot(q), -1, 1)));
		};

		_proto.rotateTowards = function rotateTowards(q, step) {
			var angle = this.angleTo(q);
			if (angle === 0) return this;
			var t = Math.min(1, step / angle);
			this.slerp(q, t);
			return this;
		};

		_proto.identity = function identity() {
			return this.set(0, 0, 0, 1);
		};

		_proto.invert = function invert() {
			// quaternion is assumed to have unit length
			return this.conjugate();
		};

		_proto.conjugate = function conjugate() {
			this._x *= -1;
			this._y *= -1;
			this._z *= -1;

			this._onChangeCallback();

			return this;
		};

		_proto.dot = function dot(v) {
			return this._x * v._x + this._y * v._y + this._z * v._z + this._w * v._w;
		};

		_proto.lengthSq = function lengthSq() {
			return this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w;
		};

		_proto.length = function length() {
			return Math.sqrt(this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w);
		};

		_proto.normalize = function normalize() {
			var l = this.length();

			if (l === 0) {
				this._x = 0;
				this._y = 0;
				this._z = 0;
				this._w = 1;
			} else {
				l = 1 / l;
				this._x = this._x * l;
				this._y = this._y * l;
				this._z = this._z * l;
				this._w = this._w * l;
			}

			this._onChangeCallback();

			return this;
		};

		_proto.multiply = function multiply(q, p) {
			if (p !== undefined) {
				console.warn('THREE.Quaternion: .multiply() now only accepts one argument. Use .multiplyQuaternions( a, b ) instead.');
				return this.multiplyQuaternions(q, p);
			}

			return this.multiplyQuaternions(this, q);
		};

		_proto.premultiply = function premultiply(q) {
			return this.multiplyQuaternions(q, this);
		};

		_proto.multiplyQuaternions = function multiplyQuaternions(a, b) {
			// from http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/code/index.htm
			var qax = a._x,
					qay = a._y,
					qaz = a._z,
					qaw = a._w;
			var qbx = b._x,
					qby = b._y,
					qbz = b._z,
					qbw = b._w;
			this._x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;
			this._y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;
			this._z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;
			this._w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;

			this._onChangeCallback();

			return this;
		};

		_proto.slerp = function slerp(qb, t) {
			if (t === 0) return this;
			if (t === 1) return this.copy(qb);
			var x = this._x,
					y = this._y,
					z = this._z,
					w = this._w; // http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/slerp/

			var cosHalfTheta = w * qb._w + x * qb._x + y * qb._y + z * qb._z;

			if (cosHalfTheta < 0) {
				this._w = -qb._w;
				this._x = -qb._x;
				this._y = -qb._y;
				this._z = -qb._z;
				cosHalfTheta = -cosHalfTheta;
			} else {
				this.copy(qb);
			}

			if (cosHalfTheta >= 1.0) {
				this._w = w;
				this._x = x;
				this._y = y;
				this._z = z;
				return this;
			}

			var sqrSinHalfTheta = 1.0 - cosHalfTheta * cosHalfTheta;

			if (sqrSinHalfTheta <= Number.EPSILON) {
				var s = 1 - t;
				this._w = s * w + t * this._w;
				this._x = s * x + t * this._x;
				this._y = s * y + t * this._y;
				this._z = s * z + t * this._z;
				this.normalize();

				this._onChangeCallback();

				return this;
			}

			var sinHalfTheta = Math.sqrt(sqrSinHalfTheta);
			var halfTheta = Math.atan2(sinHalfTheta, cosHalfTheta);
			var ratioA = Math.sin((1 - t) * halfTheta) / sinHalfTheta,
					ratioB = Math.sin(t * halfTheta) / sinHalfTheta;
			this._w = w * ratioA + this._w * ratioB;
			this._x = x * ratioA + this._x * ratioB;
			this._y = y * ratioA + this._y * ratioB;
			this._z = z * ratioA + this._z * ratioB;

			this._onChangeCallback();

			return this;
		};

		_proto.equals = function equals(quaternion) {
			return quaternion._x === this._x && quaternion._y === this._y && quaternion._z === this._z && quaternion._w === this._w;
		};

		_proto.fromArray = function fromArray(array, offset) {
			if (offset === void 0) {
				offset = 0;
			}

			this._x = array[offset];
			this._y = array[offset + 1];
			this._z = array[offset + 2];
			this._w = array[offset + 3];

			this._onChangeCallback();

			return this;
		};

		_proto.toArray = function toArray(array, offset) {
			if (array === void 0) {
				array = [];
			}

			if (offset === void 0) {
				offset = 0;
			}

			array[offset] = this._x;
			array[offset + 1] = this._y;
			array[offset + 2] = this._z;
			array[offset + 3] = this._w;
			return array;
		};

		_proto.fromBufferAttribute = function fromBufferAttribute(attribute, index) {
			this._x = attribute.getX(index);
			this._y = attribute.getY(index);
			this._z = attribute.getZ(index);
			this._w = attribute.getW(index);
			return this;
		};

		_proto._onChange = function _onChange(callback) {
			this._onChangeCallback = callback;
			return this;
		};

		_proto._onChangeCallback = function _onChangeCallback() {};

		_createClass(Quaternion, [{
			key: "x",
			get: function get() {
				return this._x;
			},
			set: function set(value) {
				this._x = value;

				this._onChangeCallback();
			}
		}, {
			key: "y",
			get: function get() {
				return this._y;
			},
			set: function set(value) {
				this._y = value;

				this._onChangeCallback();
			}
		}, {
			key: "z",
			get: function get() {
				return this._z;
			},
			set: function set(value) {
				this._z = value;

				this._onChangeCallback();
			}
		}, {
			key: "w",
			get: function get() {
				return this._w;
			},
			set: function set(value) {
				this._w = value;

				this._onChangeCallback();
			}
		}]);

		return Quaternion;
	}();

	var Vector3 = /*#__PURE__*/function () {
		function Vector3(x, y, z) {
			if (x === void 0) {
				x = 0;
			}

			if (y === void 0) {
				y = 0;
			}

			if (z === void 0) {
				z = 0;
			}

			Object.defineProperty(this, 'isVector3', {
				value: true
			});
			this.x = x;
			this.y = y;
			this.z = z;
		}

		var _proto = Vector3.prototype;

		_proto.set = function set(x, y, z) {
			if (z === undefined) z = this.z; // sprite.scale.set(x,y)

			this.x = x;
			this.y = y;
			this.z = z;
			return this;
		};

		_proto.setScalar = function setScalar(scalar) {
			this.x = scalar;
			this.y = scalar;
			this.z = scalar;
			return this;
		};

		_proto.setX = function setX(x) {
			this.x = x;
			return this;
		};

		_proto.setY = function setY(y) {
			this.y = y;
			return this;
		};

		_proto.setZ = function setZ(z) {
			this.z = z;
			return this;
		};

		_proto.setComponent = function setComponent(index, value) {
			switch (index) {
				case 0:
					this.x = value;
					break;

				case 1:
					this.y = value;
					break;

				case 2:
					this.z = value;
					break;

				default:
					throw new Error('index is out of range: ' + index);
			}

			return this;
		};

		_proto.getComponent = function getComponent(index) {
			switch (index) {
				case 0:
					return this.x;

				case 1:
					return this.y;

				case 2:
					return this.z;

				default:
					throw new Error('index is out of range: ' + index);
			}
		};

		_proto.clone = function clone() {
			return new this.constructor(this.x, this.y, this.z);
		};

		_proto.copy = function copy(v) {
			this.x = v.x;
			this.y = v.y;
			this.z = v.z;
			return this;
		};

		_proto.add = function add(v, w) {
			if (w !== undefined) {
				console.warn('THREE.Vector3: .add() now only accepts one argument. Use .addVectors( a, b ) instead.');
				return this.addVectors(v, w);
			}

			this.x += v.x;
			this.y += v.y;
			this.z += v.z;
			return this;
		};

		_proto.addScalar = function addScalar(s) {
			this.x += s;
			this.y += s;
			this.z += s;
			return this;
		};

		_proto.addVectors = function addVectors(a, b) {
			this.x = a.x + b.x;
			this.y = a.y + b.y;
			this.z = a.z + b.z;
			return this;
		};

		_proto.addScaledVector = function addScaledVector(v, s) {
			this.x += v.x * s;
			this.y += v.y * s;
			this.z += v.z * s;
			return this;
		};

		_proto.sub = function sub(v, w) {
			if (w !== undefined) {
				console.warn('THREE.Vector3: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.');
				return this.subVectors(v, w);
			}

			this.x -= v.x;
			this.y -= v.y;
			this.z -= v.z;
			return this;
		};

		_proto.subScalar = function subScalar(s) {
			this.x -= s;
			this.y -= s;
			this.z -= s;
			return this;
		};

		_proto.subVectors = function subVectors(a, b) {
			this.x = a.x - b.x;
			this.y = a.y - b.y;
			this.z = a.z - b.z;
			return this;
		};

		_proto.multiply = function multiply(v, w) {
			if (w !== undefined) {
				console.warn('THREE.Vector3: .multiply() now only accepts one argument. Use .multiplyVectors( a, b ) instead.');
				return this.multiplyVectors(v, w);
			}

			this.x *= v.x;
			this.y *= v.y;
			this.z *= v.z;
			return this;
		};

		_proto.multiplyScalar = function multiplyScalar(scalar) {
			this.x *= scalar;
			this.y *= scalar;
			this.z *= scalar;
			return this;
		};

		_proto.multiplyVectors = function multiplyVectors(a, b) {
			this.x = a.x * b.x;
			this.y = a.y * b.y;
			this.z = a.z * b.z;
			return this;
		};

		_proto.applyEuler = function applyEuler(euler) {
			if (!(euler && euler.isEuler)) {
				console.error('THREE.Vector3: .applyEuler() now expects an Euler rotation rather than a Vector3 and order.');
			}

			return this.applyQuaternion(_quaternion.setFromEuler(euler));
		};

		_proto.applyAxisAngle = function applyAxisAngle(axis, angle) {
			return this.applyQuaternion(_quaternion.setFromAxisAngle(axis, angle));
		};

		_proto.applyMatrix3 = function applyMatrix3(m) {
			var x = this.x,
					y = this.y,
					z = this.z;
			var e = m.elements;
			this.x = e[0] * x + e[3] * y + e[6] * z;
			this.y = e[1] * x + e[4] * y + e[7] * z;
			this.z = e[2] * x + e[5] * y + e[8] * z;
			return this;
		};

		_proto.applyNormalMatrix = function applyNormalMatrix(m) {
			return this.applyMatrix3(m).normalize();
		};

		_proto.applyMatrix4 = function applyMatrix4(m) {
			var x = this.x,
					y = this.y,
					z = this.z;
			var e = m.elements;
			var w = 1 / (e[3] * x + e[7] * y + e[11] * z + e[15]);
			this.x = (e[0] * x + e[4] * y + e[8] * z + e[12]) * w;
			this.y = (e[1] * x + e[5] * y + e[9] * z + e[13]) * w;
			this.z = (e[2] * x + e[6] * y + e[10] * z + e[14]) * w;
			return this;
		};

		_proto.applyQuaternion = function applyQuaternion(q) {
			var x = this.x,
					y = this.y,
					z = this.z;
			var qx = q.x,
					qy = q.y,
					qz = q.z,
					qw = q.w; // calculate quat * vector

			var ix = qw * x + qy * z - qz * y;
			var iy = qw * y + qz * x - qx * z;
			var iz = qw * z + qx * y - qy * x;
			var iw = -qx * x - qy * y - qz * z; // calculate result * inverse quat

			this.x = ix * qw + iw * -qx + iy * -qz - iz * -qy;
			this.y = iy * qw + iw * -qy + iz * -qx - ix * -qz;
			this.z = iz * qw + iw * -qz + ix * -qy - iy * -qx;
			return this;
		};

		_proto.project = function project(camera) {
			return this.applyMatrix4(camera.matrixWorldInverse).applyMatrix4(camera.projectionMatrix);
		};

		_proto.unproject = function unproject(camera) {
			return this.applyMatrix4(camera.projectionMatrixInverse).applyMatrix4(camera.matrixWorld);
		};

		_proto.transformDirection = function transformDirection(m) {
			// input: THREE.Matrix4 affine matrix
			// vector interpreted as a direction
			var x = this.x,
					y = this.y,
					z = this.z;
			var e = m.elements;
			this.x = e[0] * x + e[4] * y + e[8] * z;
			this.y = e[1] * x + e[5] * y + e[9] * z;
			this.z = e[2] * x + e[6] * y + e[10] * z;
			return this.normalize();
		};

		_proto.divide = function divide(v) {
			this.x /= v.x;
			this.y /= v.y;
			this.z /= v.z;
			return this;
		};

		_proto.divideScalar = function divideScalar(scalar) {
			return this.multiplyScalar(1 / scalar);
		};

		_proto.min = function min(v) {
			this.x = Math.min(this.x, v.x);
			this.y = Math.min(this.y, v.y);
			this.z = Math.min(this.z, v.z);
			return this;
		};

		_proto.max = function max(v) {
			this.x = Math.max(this.x, v.x);
			this.y = Math.max(this.y, v.y);
			this.z = Math.max(this.z, v.z);
			return this;
		};

		_proto.clamp = function clamp(min, max) {
			// assumes min < max, componentwise
			this.x = Math.max(min.x, Math.min(max.x, this.x));
			this.y = Math.max(min.y, Math.min(max.y, this.y));
			this.z = Math.max(min.z, Math.min(max.z, this.z));
			return this;
		};

		_proto.clampScalar = function clampScalar(minVal, maxVal) {
			this.x = Math.max(minVal, Math.min(maxVal, this.x));
			this.y = Math.max(minVal, Math.min(maxVal, this.y));
			this.z = Math.max(minVal, Math.min(maxVal, this.z));
			return this;
		};

		_proto.clampLength = function clampLength(min, max) {
			var length = this.length();
			return this.divideScalar(length || 1).multiplyScalar(Math.max(min, Math.min(max, length)));
		};

		_proto.floor = function floor() {
			this.x = Math.floor(this.x);
			this.y = Math.floor(this.y);
			this.z = Math.floor(this.z);
			return this;
		};

		_proto.ceil = function ceil() {
			this.x = Math.ceil(this.x);
			this.y = Math.ceil(this.y);
			this.z = Math.ceil(this.z);
			return this;
		};

		_proto.round = function round() {
			this.x = Math.round(this.x);
			this.y = Math.round(this.y);
			this.z = Math.round(this.z);
			return this;
		};

		_proto.roundToZero = function roundToZero() {
			this.x = this.x < 0 ? Math.ceil(this.x) : Math.floor(this.x);
			this.y = this.y < 0 ? Math.ceil(this.y) : Math.floor(this.y);
			this.z = this.z < 0 ? Math.ceil(this.z) : Math.floor(this.z);
			return this;
		};

		_proto.negate = function negate() {
			this.x = -this.x;
			this.y = -this.y;
			this.z = -this.z;
			return this;
		};

		_proto.dot = function dot(v) {
			return this.x * v.x + this.y * v.y + this.z * v.z;
		} // TODO lengthSquared?
		;

		_proto.lengthSq = function lengthSq() {
			return this.x * this.x + this.y * this.y + this.z * this.z;
		};

		_proto.length = function length() {
			return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);
		};

		_proto.manhattanLength = function manhattanLength() {
			return Math.abs(this.x) + Math.abs(this.y) + Math.abs(this.z);
		};

		_proto.normalize = function normalize() {
			return this.divideScalar(this.length() || 1);
		};

		_proto.setLength = function setLength(length) {
			return this.normalize().multiplyScalar(length);
		};

		_proto.lerp = function lerp(v, alpha) {
			this.x += (v.x - this.x) * alpha;
			this.y += (v.y - this.y) * alpha;
			this.z += (v.z - this.z) * alpha;
			return this;
		};

		_proto.lerpVectors = function lerpVectors(v1, v2, alpha) {
			this.x = v1.x + (v2.x - v1.x) * alpha;
			this.y = v1.y + (v2.y - v1.y) * alpha;
			this.z = v1.z + (v2.z - v1.z) * alpha;
			return this;
		};

		_proto.cross = function cross(v, w) {
			if (w !== undefined) {
				console.warn('THREE.Vector3: .cross() now only accepts one argument. Use .crossVectors( a, b ) instead.');
				return this.crossVectors(v, w);
			}

			return this.crossVectors(this, v);
		};

		_proto.crossVectors = function crossVectors(a, b) {
			var ax = a.x,
					ay = a.y,
					az = a.z;
			var bx = b.x,
					by = b.y,
					bz = b.z;
			this.x = ay * bz - az * by;
			this.y = az * bx - ax * bz;
			this.z = ax * by - ay * bx;
			return this;
		};

		_proto.projectOnVector = function projectOnVector(v) {
			var denominator = v.lengthSq();
			if (denominator === 0) return this.set(0, 0, 0);
			var scalar = v.dot(this) / denominator;
			return this.copy(v).multiplyScalar(scalar);
		};

		_proto.projectOnPlane = function projectOnPlane(planeNormal) {
			_vector.copy(this).projectOnVector(planeNormal);

			return this.sub(_vector);
		};

		_proto.reflect = function reflect(normal) {
			// reflect incident vector off plane orthogonal to normal
			// normal is assumed to have unit length
			return this.sub(_vector.copy(normal).multiplyScalar(2 * this.dot(normal)));
		};

		_proto.angleTo = function angleTo(v) {
			var denominator = Math.sqrt(this.lengthSq() * v.lengthSq());
			if (denominator === 0) return Math.PI / 2;
			var theta = this.dot(v) / denominator; // clamp, to handle numerical problems

			return Math.acos(MathUtils.clamp(theta, -1, 1));
		};

		_proto.distanceTo = function distanceTo(v) {
			return Math.sqrt(this.distanceToSquared(v));
		};

		_proto.distanceToSquared = function distanceToSquared(v) {
			var dx = this.x - v.x,
					dy = this.y - v.y,
					dz = this.z - v.z;
			return dx * dx + dy * dy + dz * dz;
		};

		_proto.manhattanDistanceTo = function manhattanDistanceTo(v) {
			return Math.abs(this.x - v.x) + Math.abs(this.y - v.y) + Math.abs(this.z - v.z);
		};

		_proto.setFromSpherical = function setFromSpherical(s) {
			return this.setFromSphericalCoords(s.radius, s.phi, s.theta);
		};

		_proto.setFromSphericalCoords = function setFromSphericalCoords(radius, phi, theta) {
			var sinPhiRadius = Math.sin(phi) * radius;
			this.x = sinPhiRadius * Math.sin(theta);
			this.y = Math.cos(phi) * radius;
			this.z = sinPhiRadius * Math.cos(theta);
			return this;
		};

		_proto.setFromCylindrical = function setFromCylindrical(c) {
			return this.setFromCylindricalCoords(c.radius, c.theta, c.y);
		};

		_proto.setFromCylindricalCoords = function setFromCylindricalCoords(radius, theta, y) {
			this.x = radius * Math.sin(theta);
			this.y = y;
			this.z = radius * Math.cos(theta);
			return this;
		};

		_proto.setFromMatrixPosition = function setFromMatrixPosition(m) {
			var e = m.elements;
			this.x = e[12];
			this.y = e[13];
			this.z = e[14];
			return this;
		};

		_proto.setFromMatrixScale = function setFromMatrixScale(m) {
			var sx = this.setFromMatrixColumn(m, 0).length();
			var sy = this.setFromMatrixColumn(m, 1).length();
			var sz = this.setFromMatrixColumn(m, 2).length();
			this.x = sx;
			this.y = sy;
			this.z = sz;
			return this;
		};

		_proto.setFromMatrixColumn = function setFromMatrixColumn(m, index) {
			return this.fromArray(m.elements, index * 4);
		};

		_proto.setFromMatrix3Column = function setFromMatrix3Column(m, index) {
			return this.fromArray(m.elements, index * 3);
		};

		_proto.equals = function equals(v) {
			return v.x === this.x && v.y === this.y && v.z === this.z;
		};

		_proto.fromArray = function fromArray(array, offset) {
			if (offset === void 0) {
				offset = 0;
			}

			this.x = array[offset];
			this.y = array[offset + 1];
			this.z = array[offset + 2];
			return this;
		};

		_proto.toArray = function toArray(array, offset) {
			if (array === void 0) {
				array = [];
			}

			if (offset === void 0) {
				offset = 0;
			}

			array[offset] = this.x;
			array[offset + 1] = this.y;
			array[offset + 2] = this.z;
			return array;
		};

		_proto.fromBufferAttribute = function fromBufferAttribute(attribute, index, offset) {
			if (offset !== undefined) {
				console.warn('THREE.Vector3: offset has been removed from .fromBufferAttribute().');
			}

			this.x = attribute.getX(index);
			this.y = attribute.getY(index);
			this.z = attribute.getZ(index);
			return this;
		};

		_proto.random = function random() {
			this.x = Math.random();
			this.y = Math.random();
			this.z = Math.random();
			return this;
		};

		return Vector3;
	}();

	var _vector = /*@__PURE__*/new Vector3();

	var _quaternion = /*@__PURE__*/new Quaternion();

	var Box3 = /*#__PURE__*/function () {
		function Box3(min, max) {
			Object.defineProperty(this, 'isBox3', {
				value: true
			});
			this.min = min !== undefined ? min : new Vector3(+Infinity, +Infinity, +Infinity);
			this.max = max !== undefined ? max : new Vector3(-Infinity, -Infinity, -Infinity);
		}

		var _proto = Box3.prototype;

		_proto.set = function set(min, max) {
			this.min.copy(min);
			this.max.copy(max);
			return this;
		};

		_proto.setFromArray = function setFromArray(array) {
			var minX = +Infinity;
			var minY = +Infinity;
			var minZ = +Infinity;
			var maxX = -Infinity;
			var maxY = -Infinity;
			var maxZ = -Infinity;

			for (var i = 0, l = array.length; i < l; i += 3) {
				var x = array[i];
				var y = array[i + 1];
				var z = array[i + 2];
				if (x < minX) minX = x;
				if (y < minY) minY = y;
				if (z < minZ) minZ = z;
				if (x > maxX) maxX = x;
				if (y > maxY) maxY = y;
				if (z > maxZ) maxZ = z;
			}

			this.min.set(minX, minY, minZ);
			this.max.set(maxX, maxY, maxZ);
			return this;
		};

		_proto.setFromBufferAttribute = function setFromBufferAttribute(attribute) {
			var minX = +Infinity;
			var minY = +Infinity;
			var minZ = +Infinity;
			var maxX = -Infinity;
			var maxY = -Infinity;
			var maxZ = -Infinity;

			for (var i = 0, l = attribute.count; i < l; i++) {
				var x = attribute.getX(i);
				var y = attribute.getY(i);
				var z = attribute.getZ(i);
				if (x < minX) minX = x;
				if (y < minY) minY = y;
				if (z < minZ) minZ = z;
				if (x > maxX) maxX = x;
				if (y > maxY) maxY = y;
				if (z > maxZ) maxZ = z;
			}

			this.min.set(minX, minY, minZ);
			this.max.set(maxX, maxY, maxZ);
			return this;
		};

		_proto.setFromPoints = function setFromPoints(points) {
			this.makeEmpty();

			for (var i = 0, il = points.length; i < il; i++) {
				this.expandByPoint(points[i]);
			}

			return this;
		};

		_proto.setFromCenterAndSize = function setFromCenterAndSize(center, size) {
			var halfSize = _vector$1.copy(size).multiplyScalar(0.5);

			this.min.copy(center).sub(halfSize);
			this.max.copy(center).add(halfSize);
			return this;
		};

		_proto.setFromObject = function setFromObject(object) {
			this.makeEmpty();
			return this.expandByObject(object);
		};

		_proto.clone = function clone() {
			return new this.constructor().copy(this);
		};

		_proto.copy = function copy(box) {
			this.min.copy(box.min);
			this.max.copy(box.max);
			return this;
		};

		_proto.makeEmpty = function makeEmpty() {
			this.min.x = this.min.y = this.min.z = +Infinity;
			this.max.x = this.max.y = this.max.z = -Infinity;
			return this;
		};

		_proto.isEmpty = function isEmpty() {
			// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes
			return this.max.x < this.min.x || this.max.y < this.min.y || this.max.z < this.min.z;
		};

		_proto.getCenter = function getCenter(target) {
			if (target === undefined) {
				console.warn('THREE.Box3: .getCenter() target is now required');
				target = new Vector3();
			}

			return this.isEmpty() ? target.set(0, 0, 0) : target.addVectors(this.min, this.max).multiplyScalar(0.5);
		};

		_proto.getSize = function getSize(target) {
			if (target === undefined) {
				console.warn('THREE.Box3: .getSize() target is now required');
				target = new Vector3();
			}

			return this.isEmpty() ? target.set(0, 0, 0) : target.subVectors(this.max, this.min);
		};

		_proto.expandByPoint = function expandByPoint(point) {
			this.min.min(point);
			this.max.max(point);
			return this;
		};

		_proto.expandByVector = function expandByVector(vector) {
			this.min.sub(vector);
			this.max.add(vector);
			return this;
		};

		_proto.expandByScalar = function expandByScalar(scalar) {
			this.min.addScalar(-scalar);
			this.max.addScalar(scalar);
			return this;
		};

		_proto.expandByObject = function expandByObject(object) {
			// Computes the world-axis-aligned bounding box of an object (including its children),
			// accounting for both the object's, and children's, world transforms
			object.updateWorldMatrix(false, false);
			var geometry = object.geometry;

			if (geometry !== undefined) {
				if (geometry.boundingBox === null) {
					geometry.computeBoundingBox();
				}

				_box.copy(geometry.boundingBox);

				_box.applyMatrix4(object.matrixWorld);

				this.union(_box);
			}

			var children = object.children;

			for (var i = 0, l = children.length; i < l; i++) {
				this.expandByObject(children[i]);
			}

			return this;
		};

		_proto.containsPoint = function containsPoint(point) {
			return point.x < this.min.x || point.x > this.max.x || point.y < this.min.y || point.y > this.max.y || point.z < this.min.z || point.z > this.max.z ? false : true;
		};

		_proto.containsBox = function containsBox(box) {
			return this.min.x <= box.min.x && box.max.x <= this.max.x && this.min.y <= box.min.y && box.max.y <= this.max.y && this.min.z <= box.min.z && box.max.z <= this.max.z;
		};

		_proto.getParameter = function getParameter(point, target) {
			// This can potentially have a divide by zero if the box
			// has a size dimension of 0.
			if (target === undefined) {
				console.warn('THREE.Box3: .getParameter() target is now required');
				target = new Vector3();
			}

			return target.set((point.x - this.min.x) / (this.max.x - this.min.x), (point.y - this.min.y) / (this.max.y - this.min.y), (point.z - this.min.z) / (this.max.z - this.min.z));
		};

		_proto.intersectsBox = function intersectsBox(box) {
			// using 6 splitting planes to rule out intersections.
			return box.max.x < this.min.x || box.min.x > this.max.x || box.max.y < this.min.y || box.min.y > this.max.y || box.max.z < this.min.z || box.min.z > this.max.z ? false : true;
		};

		_proto.intersectsSphere = function intersectsSphere(sphere) {
			// Find the point on the AABB closest to the sphere center.
			this.clampPoint(sphere.center, _vector$1); // If that point is inside the sphere, the AABB and sphere intersect.

			return _vector$1.distanceToSquared(sphere.center) <= sphere.radius * sphere.radius;
		};

		_proto.intersectsPlane = function intersectsPlane(plane) {
			// We compute the minimum and maximum dot product values. If those values
			// are on the same side (back or front) of the plane, then there is no intersection.
			var min, max;

			if (plane.normal.x > 0) {
				min = plane.normal.x * this.min.x;
				max = plane.normal.x * this.max.x;
			} else {
				min = plane.normal.x * this.max.x;
				max = plane.normal.x * this.min.x;
			}

			if (plane.normal.y > 0) {
				min += plane.normal.y * this.min.y;
				max += plane.normal.y * this.max.y;
			} else {
				min += plane.normal.y * this.max.y;
				max += plane.normal.y * this.min.y;
			}

			if (plane.normal.z > 0) {
				min += plane.normal.z * this.min.z;
				max += plane.normal.z * this.max.z;
			} else {
				min += plane.normal.z * this.max.z;
				max += plane.normal.z * this.min.z;
			}

			return min <= -plane.constant && max >= -plane.constant;
		};

		_proto.intersectsTriangle = function intersectsTriangle(triangle) {
			if (this.isEmpty()) {
				return false;
			} // compute box center and extents


			this.getCenter(_center);

			_extents.subVectors(this.max, _center); // translate triangle to aabb origin


			_v0.subVectors(triangle.a, _center);

			_v1.subVectors(triangle.b, _center);

			_v2.subVectors(triangle.c, _center); // compute edge vectors for triangle


			_f0.subVectors(_v1, _v0);

			_f1.subVectors(_v2, _v1);

			_f2.subVectors(_v0, _v2); // test against axes that are given by cross product combinations of the edges of the triangle and the edges of the aabb
			// make an axis testing of each of the 3 sides of the aabb against each of the 3 sides of the triangle = 9 axis of separation
			// axis_ij = u_i x f_j (u0, u1, u2 = face normals of aabb = x,y,z axes vectors since aabb is axis aligned)


			var axes = [0, -_f0.z, _f0.y, 0, -_f1.z, _f1.y, 0, -_f2.z, _f2.y, _f0.z, 0, -_f0.x, _f1.z, 0, -_f1.x, _f2.z, 0, -_f2.x, -_f0.y, _f0.x, 0, -_f1.y, _f1.x, 0, -_f2.y, _f2.x, 0];

			if (!satForAxes(axes, _v0, _v1, _v2, _extents)) {
				return false;
			} // test 3 face normals from the aabb


			axes = [1, 0, 0, 0, 1, 0, 0, 0, 1];

			if (!satForAxes(axes, _v0, _v1, _v2, _extents)) {
				return false;
			} // finally testing the face normal of the triangle
			// use already existing triangle edge vectors here


			_triangleNormal.crossVectors(_f0, _f1);

			axes = [_triangleNormal.x, _triangleNormal.y, _triangleNormal.z];
			return satForAxes(axes, _v0, _v1, _v2, _extents);
		};

		_proto.clampPoint = function clampPoint(point, target) {
			if (target === undefined) {
				console.warn('THREE.Box3: .clampPoint() target is now required');
				target = new Vector3();
			}

			return target.copy(point).clamp(this.min, this.max);
		};

		_proto.distanceToPoint = function distanceToPoint(point) {
			var clampedPoint = _vector$1.copy(point).clamp(this.min, this.max);

			return clampedPoint.sub(point).length();
		};

		_proto.getBoundingSphere = function getBoundingSphere(target) {
			if (target === undefined) {
				console.error('THREE.Box3: .getBoundingSphere() target is now required'); //target = new Sphere(); // removed to avoid cyclic dependency
			}

			this.getCenter(target.center);
			target.radius = this.getSize(_vector$1).length() * 0.5;
			return target;
		};

		_proto.intersect = function intersect(box) {
			this.min.max(box.min);
			this.max.min(box.max); // ensure that if there is no overlap, the result is fully empty, not slightly empty with non-inf/+inf values that will cause subsequence intersects to erroneously return valid values.

			if (this.isEmpty()) this.makeEmpty();
			return this;
		};

		_proto.union = function union(box) {
			this.min.min(box.min);
			this.max.max(box.max);
			return this;
		};

		_proto.applyMatrix4 = function applyMatrix4(matrix) {
			// transform of empty box is an empty box.
			if (this.isEmpty()) return this; // NOTE: I am using a binary pattern to specify all 2^3 combinations below

			_points[0].set(this.min.x, this.min.y, this.min.z).applyMatrix4(matrix); // 000


			_points[1].set(this.min.x, this.min.y, this.max.z).applyMatrix4(matrix); // 001


			_points[2].set(this.min.x, this.max.y, this.min.z).applyMatrix4(matrix); // 010


			_points[3].set(this.min.x, this.max.y, this.max.z).applyMatrix4(matrix); // 011


			_points[4].set(this.max.x, this.min.y, this.min.z).applyMatrix4(matrix); // 100


			_points[5].set(this.max.x, this.min.y, this.max.z).applyMatrix4(matrix); // 101


			_points[6].set(this.max.x, this.max.y, this.min.z).applyMatrix4(matrix); // 110


			_points[7].set(this.max.x, this.max.y, this.max.z).applyMatrix4(matrix); // 111


			this.setFromPoints(_points);
			return this;
		};

		_proto.translate = function translate(offset) {
			this.min.add(offset);
			this.max.add(offset);
			return this;
		};

		_proto.equals = function equals(box) {
			return box.min.equals(this.min) && box.max.equals(this.max);
		};

		return Box3;
	}();

	function satForAxes(axes, v0, v1, v2, extents) {
		for (var i = 0, j = axes.length - 3; i <= j; i += 3) {
			_testAxis.fromArray(axes, i); // project the aabb onto the seperating axis


			var r = extents.x * Math.abs(_testAxis.x) + extents.y * Math.abs(_testAxis.y) + extents.z * Math.abs(_testAxis.z); // project all 3 vertices of the triangle onto the seperating axis

			var p0 = v0.dot(_testAxis);
			var p1 = v1.dot(_testAxis);
			var p2 = v2.dot(_testAxis); // actual test, basically see if either of the most extreme of the triangle points intersects r

			if (Math.max(-Math.max(p0, p1, p2), Math.min(p0, p1, p2)) > r) {
				// points of the projected triangle are outside the projected half-length of the aabb
				// the axis is seperating and we can exit
				return false;
			}
		}

		return true;
	}

	var _points = [/*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3()];

	var _vector$1 = /*@__PURE__*/new Vector3();

	var _box = /*@__PURE__*/new Box3(); // triangle centered vertices


	var _v0 = /*@__PURE__*/new Vector3();

	var _v1 = /*@__PURE__*/new Vector3();

	var _v2 = /*@__PURE__*/new Vector3(); // triangle edge vectors


	var _f0 = /*@__PURE__*/new Vector3();

	var _f1 = /*@__PURE__*/new Vector3();

	var _f2 = /*@__PURE__*/new Vector3();

	var _center = /*@__PURE__*/new Vector3();

	var _extents = /*@__PURE__*/new Vector3();

	var _triangleNormal = /*@__PURE__*/new Vector3();

	var _testAxis = /*@__PURE__*/new Vector3();

	var _box$1 = /*@__PURE__*/new Box3();

	var Sphere = /*#__PURE__*/function () {
		function Sphere(center, radius) {
			this.center = center !== undefined ? center : new Vector3();
			this.radius = radius !== undefined ? radius : -1;
		}

		var _proto = Sphere.prototype;

		_proto.set = function set(center, radius) {
			this.center.copy(center);
			this.radius = radius;
			return this;
		};

		_proto.setFromPoints = function setFromPoints(points, optionalCenter) {
			var center = this.center;

			if (optionalCenter !== undefined) {
				center.copy(optionalCenter);
			} else {
				_box$1.setFromPoints(points).getCenter(center);
			}

			var maxRadiusSq = 0;

			for (var i = 0, il = points.length; i < il; i++) {
				maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(points[i]));
			}

			this.radius = Math.sqrt(maxRadiusSq);
			return this;
		};

		_proto.clone = function clone() {
			return new this.constructor().copy(this);
		};

		_proto.copy = function copy(sphere) {
			this.center.copy(sphere.center);
			this.radius = sphere.radius;
			return this;
		};

		_proto.isEmpty = function isEmpty() {
			return this.radius < 0;
		};

		_proto.makeEmpty = function makeEmpty() {
			this.center.set(0, 0, 0);
			this.radius = -1;
			return this;
		};

		_proto.containsPoint = function containsPoint(point) {
			return point.distanceToSquared(this.center) <= this.radius * this.radius;
		};

		_proto.distanceToPoint = function distanceToPoint(point) {
			return point.distanceTo(this.center) - this.radius;
		};

		_proto.intersectsSphere = function intersectsSphere(sphere) {
			var radiusSum = this.radius + sphere.radius;
			return sphere.center.distanceToSquared(this.center) <= radiusSum * radiusSum;
		};

		_proto.intersectsBox = function intersectsBox(box) {
			return box.intersectsSphere(this);
		};

		_proto.intersectsPlane = function intersectsPlane(plane) {
			return Math.abs(plane.distanceToPoint(this.center)) <= this.radius;
		};

		_proto.clampPoint = function clampPoint(point, target) {
			var deltaLengthSq = this.center.distanceToSquared(point);

			if (target === undefined) {
				console.warn('THREE.Sphere: .clampPoint() target is now required');
				target = new Vector3();
			}

			target.copy(point);

			if (deltaLengthSq > this.radius * this.radius) {
				target.sub(this.center).normalize();
				target.multiplyScalar(this.radius).add(this.center);
			}

			return target;
		};

		_proto.getBoundingBox = function getBoundingBox(target) {
			if (target === undefined) {
				console.warn('THREE.Sphere: .getBoundingBox() target is now required');
				target = new Box3();
			}

			if (this.isEmpty()) {
				// Empty sphere produces empty bounding box
				target.makeEmpty();
				return target;
			}

			target.set(this.center, this.center);
			target.expandByScalar(this.radius);
			return target;
		};

		_proto.applyMatrix4 = function applyMatrix4(matrix) {
			this.center.applyMatrix4(matrix);
			this.radius = this.radius * matrix.getMaxScaleOnAxis();
			return this;
		};

		_proto.translate = function translate(offset) {
			this.center.add(offset);
			return this;
		};

		_proto.equals = function equals(sphere) {
			return sphere.center.equals(this.center) && sphere.radius === this.radius;
		};

		return Sphere;
	}();

	var _vector$2 = /*@__PURE__*/new Vector3();

	var _segCenter = /*@__PURE__*/new Vector3();

	var _segDir = /*@__PURE__*/new Vector3();

	var _diff = /*@__PURE__*/new Vector3();

	var _edge1 = /*@__PURE__*/new Vector3();

	var _edge2 = /*@__PURE__*/new Vector3();

	var _normal = /*@__PURE__*/new Vector3();

	var Ray = /*#__PURE__*/function () {
		function Ray(origin, direction) {
			this.origin = origin !== undefined ? origin : new Vector3();
			this.direction = direction !== undefined ? direction : new Vector3(0, 0, -1);
		}

		var _proto = Ray.prototype;

		_proto.set = function set(origin, direction) {
			this.origin.copy(origin);
			this.direction.copy(direction);
			return this;
		};

		_proto.clone = function clone() {
			return new this.constructor().copy(this);
		};

		_proto.copy = function copy(ray) {
			this.origin.copy(ray.origin);
			this.direction.copy(ray.direction);
			return this;
		};

		_proto.at = function at(t, target) {
			if (target === undefined) {
				console.warn('THREE.Ray: .at() target is now required');
				target = new Vector3();
			}

			return target.copy(this.direction).multiplyScalar(t).add(this.origin);
		};

		_proto.lookAt = function lookAt(v) {
			this.direction.copy(v).sub(this.origin).normalize();
			return this;
		};

		_proto.recast = function recast(t) {
			this.origin.copy(this.at(t, _vector$2));
			return this;
		};

		_proto.closestPointToPoint = function closestPointToPoint(point, target) {
			if (target === undefined) {
				console.warn('THREE.Ray: .closestPointToPoint() target is now required');
				target = new Vector3();
			}

			target.subVectors(point, this.origin);
			var directionDistance = target.dot(this.direction);

			if (directionDistance < 0) {
				return target.copy(this.origin);
			}

			return target.copy(this.direction).multiplyScalar(directionDistance).add(this.origin);
		};

		_proto.distanceToPoint = function distanceToPoint(point) {
			return Math.sqrt(this.distanceSqToPoint(point));
		};

		_proto.distanceSqToPoint = function distanceSqToPoint(point) {
			var directionDistance = _vector$2.subVectors(point, this.origin).dot(this.direction); // point behind the ray


			if (directionDistance < 0) {
				return this.origin.distanceToSquared(point);
			}

			_vector$2.copy(this.direction).multiplyScalar(directionDistance).add(this.origin);

			return _vector$2.distanceToSquared(point);
		};

		_proto.distanceSqToSegment = function distanceSqToSegment(v0, v1, optionalPointOnRay, optionalPointOnSegment) {
			// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteDistRaySegment.h
			// It returns the min distance between the ray and the segment
			// defined by v0 and v1
			// It can also set two optional targets :
			// - The closest point on the ray
			// - The closest point on the segment
			_segCenter.copy(v0).add(v1).multiplyScalar(0.5);

			_segDir.copy(v1).sub(v0).normalize();

			_diff.copy(this.origin).sub(_segCenter);

			var segExtent = v0.distanceTo(v1) * 0.5;
			var a01 = -this.direction.dot(_segDir);

			var b0 = _diff.dot(this.direction);

			var b1 = -_diff.dot(_segDir);

			var c = _diff.lengthSq();

			var det = Math.abs(1 - a01 * a01);
			var s0, s1, sqrDist, extDet;

			if (det > 0) {
				// The ray and segment are not parallel.
				s0 = a01 * b1 - b0;
				s1 = a01 * b0 - b1;
				extDet = segExtent * det;

				if (s0 >= 0) {
					if (s1 >= -extDet) {
						if (s1 <= extDet) {
							// region 0
							// Minimum at interior points of ray and segment.
							var invDet = 1 / det;
							s0 *= invDet;
							s1 *= invDet;
							sqrDist = s0 * (s0 + a01 * s1 + 2 * b0) + s1 * (a01 * s0 + s1 + 2 * b1) + c;
						} else {
							// region 1
							s1 = segExtent;
							s0 = Math.max(0, -(a01 * s1 + b0));
							sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
						}
					} else {
						// region 5
						s1 = -segExtent;
						s0 = Math.max(0, -(a01 * s1 + b0));
						sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
					}
				} else {
					if (s1 <= -extDet) {
						// region 4
						s0 = Math.max(0, -(-a01 * segExtent + b0));
						s1 = s0 > 0 ? -segExtent : Math.min(Math.max(-segExtent, -b1), segExtent);
						sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
					} else if (s1 <= extDet) {
						// region 3
						s0 = 0;
						s1 = Math.min(Math.max(-segExtent, -b1), segExtent);
						sqrDist = s1 * (s1 + 2 * b1) + c;
					} else {
						// region 2
						s0 = Math.max(0, -(a01 * segExtent + b0));
						s1 = s0 > 0 ? segExtent : Math.min(Math.max(-segExtent, -b1), segExtent);
						sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
					}
				}
			} else {
				// Ray and segment are parallel.
				s1 = a01 > 0 ? -segExtent : segExtent;
				s0 = Math.max(0, -(a01 * s1 + b0));
				sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
			}

			if (optionalPointOnRay) {
				optionalPointOnRay.copy(this.direction).multiplyScalar(s0).add(this.origin);
			}

			if (optionalPointOnSegment) {
				optionalPointOnSegment.copy(_segDir).multiplyScalar(s1).add(_segCenter);
			}

			return sqrDist;
		};

		_proto.intersectSphere = function intersectSphere(sphere, target) {
			_vector$2.subVectors(sphere.center, this.origin);

			var tca = _vector$2.dot(this.direction);

			var d2 = _vector$2.dot(_vector$2) - tca * tca;
			var radius2 = sphere.radius * sphere.radius;
			if (d2 > radius2) return null;
			var thc = Math.sqrt(radius2 - d2); // t0 = first intersect point - entrance on front of sphere

			var t0 = tca - thc; // t1 = second intersect point - exit point on back of sphere

			var t1 = tca + thc; // test to see if both t0 and t1 are behind the ray - if so, return null

			if (t0 < 0 && t1 < 0) return null; // test to see if t0 is behind the ray:
			// if it is, the ray is inside the sphere, so return the second exit point scaled by t1,
			// in order to always return an intersect point that is in front of the ray.

			if (t0 < 0) return this.at(t1, target); // else t0 is in front of the ray, so return the first collision point scaled by t0

			return this.at(t0, target);
		};

		_proto.intersectsSphere = function intersectsSphere(sphere) {
			return this.distanceSqToPoint(sphere.center) <= sphere.radius * sphere.radius;
		};

		_proto.distanceToPlane = function distanceToPlane(plane) {
			var denominator = plane.normal.dot(this.direction);

			if (denominator === 0) {
				// line is coplanar, return origin
				if (plane.distanceToPoint(this.origin) === 0) {
					return 0;
				} // Null is preferable to undefined since undefined means.... it is undefined


				return null;
			}

			var t = -(this.origin.dot(plane.normal) + plane.constant) / denominator; // Return if the ray never intersects the plane

			return t >= 0 ? t : null;
		};

		_proto.intersectPlane = function intersectPlane(plane, target) {
			var t = this.distanceToPlane(plane);

			if (t === null) {
				return null;
			}

			return this.at(t, target);
		};

		_proto.intersectsPlane = function intersectsPlane(plane) {
			// check if the ray lies on the plane first
			var distToPoint = plane.distanceToPoint(this.origin);

			if (distToPoint === 0) {
				return true;
			}

			var denominator = plane.normal.dot(this.direction);

			if (denominator * distToPoint < 0) {
				return true;
			} // ray origin is behind the plane (and is pointing behind it)


			return false;
		};

		_proto.intersectBox = function intersectBox(box, target) {
			var tmin, tmax, tymin, tymax, tzmin, tzmax;
			var invdirx = 1 / this.direction.x,
					invdiry = 1 / this.direction.y,
					invdirz = 1 / this.direction.z;
			var origin = this.origin;

			if (invdirx >= 0) {
				tmin = (box.min.x - origin.x) * invdirx;
				tmax = (box.max.x - origin.x) * invdirx;
			} else {
				tmin = (box.max.x - origin.x) * invdirx;
				tmax = (box.min.x - origin.x) * invdirx;
			}

			if (invdiry >= 0) {
				tymin = (box.min.y - origin.y) * invdiry;
				tymax = (box.max.y - origin.y) * invdiry;
			} else {
				tymin = (box.max.y - origin.y) * invdiry;
				tymax = (box.min.y - origin.y) * invdiry;
			}

			if (tmin > tymax || tymin > tmax) return null; // These lines also handle the case where tmin or tmax is NaN
			// (result of 0 * Infinity). x !== x returns true if x is NaN

			if (tymin > tmin || tmin !== tmin) tmin = tymin;
			if (tymax < tmax || tmax !== tmax) tmax = tymax;

			if (invdirz >= 0) {
				tzmin = (box.min.z - origin.z) * invdirz;
				tzmax = (box.max.z - origin.z) * invdirz;
			} else {
				tzmin = (box.max.z - origin.z) * invdirz;
				tzmax = (box.min.z - origin.z) * invdirz;
			}

			if (tmin > tzmax || tzmin > tmax) return null;
			if (tzmin > tmin || tmin !== tmin) tmin = tzmin;
			if (tzmax < tmax || tmax !== tmax) tmax = tzmax; //return point closest to the ray (positive side)

			if (tmax < 0) return null;
			return this.at(tmin >= 0 ? tmin : tmax, target);
		};

		_proto.intersectsBox = function intersectsBox(box) {
			return this.intersectBox(box, _vector$2) !== null;
		};

		_proto.intersectTriangle = function intersectTriangle(a, b, c, backfaceCulling, target) {
			// Compute the offset origin, edges, and normal.
			// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteIntrRay3Triangle3.h
			_edge1.subVectors(b, a);

			_edge2.subVectors(c, a);

			_normal.crossVectors(_edge1, _edge2); // Solve Q + t*D = b1*E1 + b2*E2 (Q = kDiff, D = ray direction,
			// E1 = kEdge1, E2 = kEdge2, N = Cross(E1,E2)) by
			//	 |Dot(D,N)|*b1 = sign(Dot(D,N))*Dot(D,Cross(Q,E2))
			//	 |Dot(D,N)|*b2 = sign(Dot(D,N))*Dot(D,Cross(E1,Q))
			//	 |Dot(D,N)|*t = -sign(Dot(D,N))*Dot(Q,N)


			var DdN = this.direction.dot(_normal);
			var sign;

			if (DdN > 0) {
				if (backfaceCulling) return null;
				sign = 1;
			} else if (DdN < 0) {
				sign = -1;
				DdN = -DdN;
			} else {
				return null;
			}

			_diff.subVectors(this.origin, a);

			var DdQxE2 = sign * this.direction.dot(_edge2.crossVectors(_diff, _edge2)); // b1 < 0, no intersection

			if (DdQxE2 < 0) {
				return null;
			}

			var DdE1xQ = sign * this.direction.dot(_edge1.cross(_diff)); // b2 < 0, no intersection

			if (DdE1xQ < 0) {
				return null;
			} // b1+b2 > 1, no intersection


			if (DdQxE2 + DdE1xQ > DdN) {
				return null;
			} // Line intersects triangle, check if ray does.


			var QdN = -sign * _diff.dot(_normal); // t < 0, no intersection


			if (QdN < 0) {
				return null;
			} // Ray intersects triangle.


			return this.at(QdN / DdN, target);
		};

		_proto.applyMatrix4 = function applyMatrix4(matrix4) {
			this.origin.applyMatrix4(matrix4);
			this.direction.transformDirection(matrix4);
			return this;
		};

		_proto.equals = function equals(ray) {
			return ray.origin.equals(this.origin) && ray.direction.equals(this.direction);
		};

		return Ray;
	}();

	var Matrix4 = /*#__PURE__*/function () {
		function Matrix4() {
			Object.defineProperty(this, 'isMatrix4', {
				value: true
			});
			this.elements = [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1];

			if (arguments.length > 0) {
				console.error('THREE.Matrix4: the constructor no longer reads arguments. use .set() instead.');
			}
		}

		var _proto = Matrix4.prototype;

		_proto.set = function set(n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44) {
			var te = this.elements;
			te[0] = n11;
			te[4] = n12;
			te[8] = n13;
			te[12] = n14;
			te[1] = n21;
			te[5] = n22;
			te[9] = n23;
			te[13] = n24;
			te[2] = n31;
			te[6] = n32;
			te[10] = n33;
			te[14] = n34;
			te[3] = n41;
			te[7] = n42;
			te[11] = n43;
			te[15] = n44;
			return this;
		};

		_proto.identity = function identity() {
			this.set(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
			return this;
		};

		_proto.clone = function clone() {
			return new Matrix4().fromArray(this.elements);
		};

		_proto.copy = function copy(m) {
			var te = this.elements;
			var me = m.elements;
			te[0] = me[0];
			te[1] = me[1];
			te[2] = me[2];
			te[3] = me[3];
			te[4] = me[4];
			te[5] = me[5];
			te[6] = me[6];
			te[7] = me[7];
			te[8] = me[8];
			te[9] = me[9];
			te[10] = me[10];
			te[11] = me[11];
			te[12] = me[12];
			te[13] = me[13];
			te[14] = me[14];
			te[15] = me[15];
			return this;
		};

		_proto.copyPosition = function copyPosition(m) {
			var te = this.elements,
					me = m.elements;
			te[12] = me[12];
			te[13] = me[13];
			te[14] = me[14];
			return this;
		};

		_proto.setFromMatrix3 = function setFromMatrix3(m) {
			var me = m.elements;
			this.set(me[0], me[3], me[6], 0, me[1], me[4], me[7], 0, me[2], me[5], me[8], 0, 0, 0, 0, 1);
			return this;
		};

		_proto.extractBasis = function extractBasis(xAxis, yAxis, zAxis) {
			xAxis.setFromMatrixColumn(this, 0);
			yAxis.setFromMatrixColumn(this, 1);
			zAxis.setFromMatrixColumn(this, 2);
			return this;
		};

		_proto.makeBasis = function makeBasis(xAxis, yAxis, zAxis) {
			this.set(xAxis.x, yAxis.x, zAxis.x, 0, xAxis.y, yAxis.y, zAxis.y, 0, xAxis.z, yAxis.z, zAxis.z, 0, 0, 0, 0, 1);
			return this;
		};

		_proto.extractRotation = function extractRotation(m) {
			// this method does not support reflection matrices
			var te = this.elements;
			var me = m.elements;

			var scaleX = 1 / _v1$1.setFromMatrixColumn(m, 0).length();

			var scaleY = 1 / _v1$1.setFromMatrixColumn(m, 1).length();

			var scaleZ = 1 / _v1$1.setFromMatrixColumn(m, 2).length();

			te[0] = me[0] * scaleX;
			te[1] = me[1] * scaleX;
			te[2] = me[2] * scaleX;
			te[3] = 0;
			te[4] = me[4] * scaleY;
			te[5] = me[5] * scaleY;
			te[6] = me[6] * scaleY;
			te[7] = 0;
			te[8] = me[8] * scaleZ;
			te[9] = me[9] * scaleZ;
			te[10] = me[10] * scaleZ;
			te[11] = 0;
			te[12] = 0;
			te[13] = 0;
			te[14] = 0;
			te[15] = 1;
			return this;
		};

		_proto.makeRotationFromEuler = function makeRotationFromEuler(euler) {
			if (!(euler && euler.isEuler)) {
				console.error('THREE.Matrix4: .makeRotationFromEuler() now expects a Euler rotation rather than a Vector3 and order.');
			}

			var te = this.elements;
			var x = euler.x,
					y = euler.y,
					z = euler.z;
			var a = Math.cos(x),
					b = Math.sin(x);
			var c = Math.cos(y),
					d = Math.sin(y);
			var e = Math.cos(z),
					f = Math.sin(z);

			if (euler.order === 'XYZ') {
				var ae = a * e,
						af = a * f,
						be = b * e,
						bf = b * f;
				te[0] = c * e;
				te[4] = -c * f;
				te[8] = d;
				te[1] = af + be * d;
				te[5] = ae - bf * d;
				te[9] = -b * c;
				te[2] = bf - ae * d;
				te[6] = be + af * d;
				te[10] = a * c;
			} else if (euler.order === 'YXZ') {
				var ce = c * e,
						cf = c * f,
						de = d * e,
						df = d * f;
				te[0] = ce + df * b;
				te[4] = de * b - cf;
				te[8] = a * d;
				te[1] = a * f;
				te[5] = a * e;
				te[9] = -b;
				te[2] = cf * b - de;
				te[6] = df + ce * b;
				te[10] = a * c;
			} else if (euler.order === 'ZXY') {
				var _ce = c * e,
						_cf = c * f,
						_de = d * e,
						_df = d * f;

				te[0] = _ce - _df * b;
				te[4] = -a * f;
				te[8] = _de + _cf * b;
				te[1] = _cf + _de * b;
				te[5] = a * e;
				te[9] = _df - _ce * b;
				te[2] = -a * d;
				te[6] = b;
				te[10] = a * c;
			} else if (euler.order === 'ZYX') {
				var _ae = a * e,
						_af = a * f,
						_be = b * e,
						_bf = b * f;

				te[0] = c * e;
				te[4] = _be * d - _af;
				te[8] = _ae * d + _bf;
				te[1] = c * f;
				te[5] = _bf * d + _ae;
				te[9] = _af * d - _be;
				te[2] = -d;
				te[6] = b * c;
				te[10] = a * c;
			} else if (euler.order === 'YZX') {
				var ac = a * c,
						ad = a * d,
						bc = b * c,
						bd = b * d;
				te[0] = c * e;
				te[4] = bd - ac * f;
				te[8] = bc * f + ad;
				te[1] = f;
				te[5] = a * e;
				te[9] = -b * e;
				te[2] = -d * e;
				te[6] = ad * f + bc;
				te[10] = ac - bd * f;
			} else if (euler.order === 'XZY') {
				var _ac = a * c,
						_ad = a * d,
						_bc = b * c,
						_bd = b * d;

				te[0] = c * e;
				te[4] = -f;
				te[8] = d * e;
				te[1] = _ac * f + _bd;
				te[5] = a * e;
				te[9] = _ad * f - _bc;
				te[2] = _bc * f - _ad;
				te[6] = b * e;
				te[10] = _bd * f + _ac;
			} // bottom row


			te[3] = 0;
			te[7] = 0;
			te[11] = 0; // last column

			te[12] = 0;
			te[13] = 0;
			te[14] = 0;
			te[15] = 1;
			return this;
		};

		_proto.makeRotationFromQuaternion = function makeRotationFromQuaternion(q) {
			return this.compose(_zero, q, _one);
		};

		_proto.lookAt = function lookAt(eye, target, up) {
			var te = this.elements;

			_z.subVectors(eye, target);

			if (_z.lengthSq() === 0) {
				// eye and target are in the same position
				_z.z = 1;
			}

			_z.normalize();

			_x.crossVectors(up, _z);

			if (_x.lengthSq() === 0) {
				// up and z are parallel
				if (Math.abs(up.z) === 1) {
					_z.x += 0.0001;
				} else {
					_z.z += 0.0001;
				}

				_z.normalize();

				_x.crossVectors(up, _z);
			}

			_x.normalize();

			_y.crossVectors(_z, _x);

			te[0] = _x.x;
			te[4] = _y.x;
			te[8] = _z.x;
			te[1] = _x.y;
			te[5] = _y.y;
			te[9] = _z.y;
			te[2] = _x.z;
			te[6] = _y.z;
			te[10] = _z.z;
			return this;
		};

		_proto.multiply = function multiply(m, n) {
			if (n !== undefined) {
				console.warn('THREE.Matrix4: .multiply() now only accepts one argument. Use .multiplyMatrices( a, b ) instead.');
				return this.multiplyMatrices(m, n);
			}

			return this.multiplyMatrices(this, m);
		};

		_proto.premultiply = function premultiply(m) {
			return this.multiplyMatrices(m, this);
		};

		_proto.multiplyMatrices = function multiplyMatrices(a, b) {
			var ae = a.elements;
			var be = b.elements;
			var te = this.elements;
			var a11 = ae[0],
					a12 = ae[4],
					a13 = ae[8],
					a14 = ae[12];
			var a21 = ae[1],
					a22 = ae[5],
					a23 = ae[9],
					a24 = ae[13];
			var a31 = ae[2],
					a32 = ae[6],
					a33 = ae[10],
					a34 = ae[14];
			var a41 = ae[3],
					a42 = ae[7],
					a43 = ae[11],
					a44 = ae[15];
			var b11 = be[0],
					b12 = be[4],
					b13 = be[8],
					b14 = be[12];
			var b21 = be[1],
					b22 = be[5],
					b23 = be[9],
					b24 = be[13];
			var b31 = be[2],
					b32 = be[6],
					b33 = be[10],
					b34 = be[14];
			var b41 = be[3],
					b42 = be[7],
					b43 = be[11],
					b44 = be[15];
			te[0] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;
			te[4] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;
			te[8] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;
			te[12] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;
			te[1] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;
			te[5] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;
			te[9] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;
			te[13] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;
			te[2] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;
			te[6] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;
			te[10] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;
			te[14] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;
			te[3] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;
			te[7] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;
			te[11] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;
			te[15] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;
			return this;
		};

		_proto.multiplyScalar = function multiplyScalar(s) {
			var te = this.elements;
			te[0] *= s;
			te[4] *= s;
			te[8] *= s;
			te[12] *= s;
			te[1] *= s;
			te[5] *= s;
			te[9] *= s;
			te[13] *= s;
			te[2] *= s;
			te[6] *= s;
			te[10] *= s;
			te[14] *= s;
			te[3] *= s;
			te[7] *= s;
			te[11] *= s;
			te[15] *= s;
			return this;
		};

		_proto.determinant = function determinant() {
			var te = this.elements;
			var n11 = te[0],
					n12 = te[4],
					n13 = te[8],
					n14 = te[12];
			var n21 = te[1],
					n22 = te[5],
					n23 = te[9],
					n24 = te[13];
			var n31 = te[2],
					n32 = te[6],
					n33 = te[10],
					n34 = te[14];
			var n41 = te[3],
					n42 = te[7],
					n43 = te[11],
					n44 = te[15]; //TODO: make this more efficient
			//( based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm )

			return n41 * (+n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34) + n42 * (+n11 * n23 * n34 - n11 * n24 * n33 + n14 * n21 * n33 - n13 * n21 * n34 + n13 * n24 * n31 - n14 * n23 * n31) + n43 * (+n11 * n24 * n32 - n11 * n22 * n34 - n14 * n21 * n32 + n12 * n21 * n34 + n14 * n22 * n31 - n12 * n24 * n31) + n44 * (-n13 * n22 * n31 - n11 * n23 * n32 + n11 * n22 * n33 + n13 * n21 * n32 - n12 * n21 * n33 + n12 * n23 * n31);
		};

		_proto.transpose = function transpose() {
			var te = this.elements;
			var tmp;
			tmp = te[1];
			te[1] = te[4];
			te[4] = tmp;
			tmp = te[2];
			te[2] = te[8];
			te[8] = tmp;
			tmp = te[6];
			te[6] = te[9];
			te[9] = tmp;
			tmp = te[3];
			te[3] = te[12];
			te[12] = tmp;
			tmp = te[7];
			te[7] = te[13];
			te[13] = tmp;
			tmp = te[11];
			te[11] = te[14];
			te[14] = tmp;
			return this;
		};

		_proto.setPosition = function setPosition(x, y, z) {
			var te = this.elements;

			if (x.isVector3) {
				te[12] = x.x;
				te[13] = x.y;
				te[14] = x.z;
			} else {
				te[12] = x;
				te[13] = y;
				te[14] = z;
			}

			return this;
		};

		_proto.invert = function invert() {
			// based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm
			var te = this.elements,
					n11 = te[0],
					n21 = te[1],
					n31 = te[2],
					n41 = te[3],
					n12 = te[4],
					n22 = te[5],
					n32 = te[6],
					n42 = te[7],
					n13 = te[8],
					n23 = te[9],
					n33 = te[10],
					n43 = te[11],
					n14 = te[12],
					n24 = te[13],
					n34 = te[14],
					n44 = te[15],
					t11 = n23 * n34 * n42 - n24 * n33 * n42 + n24 * n32 * n43 - n22 * n34 * n43 - n23 * n32 * n44 + n22 * n33 * n44,
					t12 = n14 * n33 * n42 - n13 * n34 * n42 - n14 * n32 * n43 + n12 * n34 * n43 + n13 * n32 * n44 - n12 * n33 * n44,
					t13 = n13 * n24 * n42 - n14 * n23 * n42 + n14 * n22 * n43 - n12 * n24 * n43 - n13 * n22 * n44 + n12 * n23 * n44,
					t14 = n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34;
			var det = n11 * t11 + n21 * t12 + n31 * t13 + n41 * t14;
			if (det === 0) return this.set(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
			var detInv = 1 / det;
			te[0] = t11 * detInv;
			te[1] = (n24 * n33 * n41 - n23 * n34 * n41 - n24 * n31 * n43 + n21 * n34 * n43 + n23 * n31 * n44 - n21 * n33 * n44) * detInv;
			te[2] = (n22 * n34 * n41 - n24 * n32 * n41 + n24 * n31 * n42 - n21 * n34 * n42 - n22 * n31 * n44 + n21 * n32 * n44) * detInv;
			te[3] = (n23 * n32 * n41 - n22 * n33 * n41 - n23 * n31 * n42 + n21 * n33 * n42 + n22 * n31 * n43 - n21 * n32 * n43) * detInv;
			te[4] = t12 * detInv;
			te[5] = (n13 * n34 * n41 - n14 * n33 * n41 + n14 * n31 * n43 - n11 * n34 * n43 - n13 * n31 * n44 + n11 * n33 * n44) * detInv;
			te[6] = (n14 * n32 * n41 - n12 * n34 * n41 - n14 * n31 * n42 + n11 * n34 * n42 + n12 * n31 * n44 - n11 * n32 * n44) * detInv;
			te[7] = (n12 * n33 * n41 - n13 * n32 * n41 + n13 * n31 * n42 - n11 * n33 * n42 - n12 * n31 * n43 + n11 * n32 * n43) * detInv;
			te[8] = t13 * detInv;
			te[9] = (n14 * n23 * n41 - n13 * n24 * n41 - n14 * n21 * n43 + n11 * n24 * n43 + n13 * n21 * n44 - n11 * n23 * n44) * detInv;
			te[10] = (n12 * n24 * n41 - n14 * n22 * n41 + n14 * n21 * n42 - n11 * n24 * n42 - n12 * n21 * n44 + n11 * n22 * n44) * detInv;
			te[11] = (n13 * n22 * n41 - n12 * n23 * n41 - n13 * n21 * n42 + n11 * n23 * n42 + n12 * n21 * n43 - n11 * n22 * n43) * detInv;
			te[12] = t14 * detInv;
			te[13] = (n13 * n24 * n31 - n14 * n23 * n31 + n14 * n21 * n33 - n11 * n24 * n33 - n13 * n21 * n34 + n11 * n23 * n34) * detInv;
			te[14] = (n14 * n22 * n31 - n12 * n24 * n31 - n14 * n21 * n32 + n11 * n24 * n32 + n12 * n21 * n34 - n11 * n22 * n34) * detInv;
			te[15] = (n12 * n23 * n31 - n13 * n22 * n31 + n13 * n21 * n32 - n11 * n23 * n32 - n12 * n21 * n33 + n11 * n22 * n33) * detInv;
			return this;
		};

		_proto.scale = function scale(v) {
			var te = this.elements;
			var x = v.x,
					y = v.y,
					z = v.z;
			te[0] *= x;
			te[4] *= y;
			te[8] *= z;
			te[1] *= x;
			te[5] *= y;
			te[9] *= z;
			te[2] *= x;
			te[6] *= y;
			te[10] *= z;
			te[3] *= x;
			te[7] *= y;
			te[11] *= z;
			return this;
		};

		_proto.getMaxScaleOnAxis = function getMaxScaleOnAxis() {
			var te = this.elements;
			var scaleXSq = te[0] * te[0] + te[1] * te[1] + te[2] * te[2];
			var scaleYSq = te[4] * te[4] + te[5] * te[5] + te[6] * te[6];
			var scaleZSq = te[8] * te[8] + te[9] * te[9] + te[10] * te[10];
			return Math.sqrt(Math.max(scaleXSq, scaleYSq, scaleZSq));
		};

		_proto.makeTranslation = function makeTranslation(x, y, z) {
			this.set(1, 0, 0, x, 0, 1, 0, y, 0, 0, 1, z, 0, 0, 0, 1);
			return this;
		};

		_proto.makeRotationX = function makeRotationX(theta) {
			var c = Math.cos(theta),
					s = Math.sin(theta);
			this.set(1, 0, 0, 0, 0, c, -s, 0, 0, s, c, 0, 0, 0, 0, 1);
			return this;
		};

		_proto.makeRotationY = function makeRotationY(theta) {
			var c = Math.cos(theta),
					s = Math.sin(theta);
			this.set(c, 0, s, 0, 0, 1, 0, 0, -s, 0, c, 0, 0, 0, 0, 1);
			return this;
		};

		_proto.makeRotationZ = function makeRotationZ(theta) {
			var c = Math.cos(theta),
					s = Math.sin(theta);
			this.set(c, -s, 0, 0, s, c, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
			return this;
		};

		_proto.makeRotationAxis = function makeRotationAxis(axis, angle) {
			// Based on http://www.gamedev.net/reference/articles/article1199.asp
			var c = Math.cos(angle);
			var s = Math.sin(angle);
			var t = 1 - c;
			var x = axis.x,
					y = axis.y,
					z = axis.z;
			var tx = t * x,
					ty = t * y;
			this.set(tx * x + c, tx * y - s * z, tx * z + s * y, 0, tx * y + s * z, ty * y + c, ty * z - s * x, 0, tx * z - s * y, ty * z + s * x, t * z * z + c, 0, 0, 0, 0, 1);
			return this;
		};

		_proto.makeScale = function makeScale(x, y, z) {
			this.set(x, 0, 0, 0, 0, y, 0, 0, 0, 0, z, 0, 0, 0, 0, 1);
			return this;
		};

		_proto.makeShear = function makeShear(x, y, z) {
			this.set(1, y, z, 0, x, 1, z, 0, x, y, 1, 0, 0, 0, 0, 1);
			return this;
		};

		_proto.compose = function compose(position, quaternion, scale) {
			var te = this.elements;
			var x = quaternion._x,
					y = quaternion._y,
					z = quaternion._z,
					w = quaternion._w;
			var x2 = x + x,
					y2 = y + y,
					z2 = z + z;
			var xx = x * x2,
					xy = x * y2,
					xz = x * z2;
			var yy = y * y2,
					yz = y * z2,
					zz = z * z2;
			var wx = w * x2,
					wy = w * y2,
					wz = w * z2;
			var sx = scale.x,
					sy = scale.y,
					sz = scale.z;
			te[0] = (1 - (yy + zz)) * sx;
			te[1] = (xy + wz) * sx;
			te[2] = (xz - wy) * sx;
			te[3] = 0;
			te[4] = (xy - wz) * sy;
			te[5] = (1 - (xx + zz)) * sy;
			te[6] = (yz + wx) * sy;
			te[7] = 0;
			te[8] = (xz + wy) * sz;
			te[9] = (yz - wx) * sz;
			te[10] = (1 - (xx + yy)) * sz;
			te[11] = 0;
			te[12] = position.x;
			te[13] = position.y;
			te[14] = position.z;
			te[15] = 1;
			return this;
		};

		_proto.decompose = function decompose(position, quaternion, scale) {
			var te = this.elements;

			var sx = _v1$1.set(te[0], te[1], te[2]).length();

			var sy = _v1$1.set(te[4], te[5], te[6]).length();

			var sz = _v1$1.set(te[8], te[9], te[10]).length(); // if determine is negative, we need to invert one scale


			var det = this.determinant();
			if (det < 0) sx = -sx;
			position.x = te[12];
			position.y = te[13];
			position.z = te[14]; // scale the rotation part

			_m1.copy(this);

			var invSX = 1 / sx;
			var invSY = 1 / sy;
			var invSZ = 1 / sz;
			_m1.elements[0] *= invSX;
			_m1.elements[1] *= invSX;
			_m1.elements[2] *= invSX;
			_m1.elements[4] *= invSY;
			_m1.elements[5] *= invSY;
			_m1.elements[6] *= invSY;
			_m1.elements[8] *= invSZ;
			_m1.elements[9] *= invSZ;
			_m1.elements[10] *= invSZ;
			quaternion.setFromRotationMatrix(_m1);
			scale.x = sx;
			scale.y = sy;
			scale.z = sz;
			return this;
		};

		_proto.makePerspective = function makePerspective(left, right, top, bottom, near, far) {
			if (far === undefined) {
				console.warn('THREE.Matrix4: .makePerspective() has been redefined and has a new signature. Please check the docs.');
			}

			var te = this.elements;
			var x = 2 * near / (right - left);
			var y = 2 * near / (top - bottom);
			var a = (right + left) / (right - left);
			var b = (top + bottom) / (top - bottom);
			var c = -(far + near) / (far - near);
			var d = -2 * far * near / (far - near);
			te[0] = x;
			te[4] = 0;
			te[8] = a;
			te[12] = 0;
			te[1] = 0;
			te[5] = y;
			te[9] = b;
			te[13] = 0;
			te[2] = 0;
			te[6] = 0;
			te[10] = c;
			te[14] = d;
			te[3] = 0;
			te[7] = 0;
			te[11] = -1;
			te[15] = 0;
			return this;
		};

		_proto.makeOrthographic = function makeOrthographic(left, right, top, bottom, near, far) {
			var te = this.elements;
			var w = 1.0 / (right - left);
			var h = 1.0 / (top - bottom);
			var p = 1.0 / (far - near);
			var x = (right + left) * w;
			var y = (top + bottom) * h;
			var z = (far + near) * p;
			te[0] = 2 * w;
			te[4] = 0;
			te[8] = 0;
			te[12] = -x;
			te[1] = 0;
			te[5] = 2 * h;
			te[9] = 0;
			te[13] = -y;
			te[2] = 0;
			te[6] = 0;
			te[10] = -2 * p;
			te[14] = -z;
			te[3] = 0;
			te[7] = 0;
			te[11] = 0;
			te[15] = 1;
			return this;
		};

		_proto.equals = function equals(matrix) {
			var te = this.elements;
			var me = matrix.elements;

			for (var i = 0; i < 16; i++) {
				if (te[i] !== me[i]) return false;
			}

			return true;
		};

		_proto.fromArray = function fromArray(array, offset) {
			if (offset === void 0) {
				offset = 0;
			}

			for (var i = 0; i < 16; i++) {
				this.elements[i] = array[i + offset];
			}

			return this;
		};

		_proto.toArray = function toArray(array, offset) {
			if (array === void 0) {
				array = [];
			}

			if (offset === void 0) {
				offset = 0;
			}

			var te = this.elements;
			array[offset] = te[0];
			array[offset + 1] = te[1];
			array[offset + 2] = te[2];
			array[offset + 3] = te[3];
			array[offset + 4] = te[4];
			array[offset + 5] = te[5];
			array[offset + 6] = te[6];
			array[offset + 7] = te[7];
			array[offset + 8] = te[8];
			array[offset + 9] = te[9];
			array[offset + 10] = te[10];
			array[offset + 11] = te[11];
			array[offset + 12] = te[12];
			array[offset + 13] = te[13];
			array[offset + 14] = te[14];
			array[offset + 15] = te[15];
			return array;
		};

		return Matrix4;
	}();

	var _v1$1 = /*@__PURE__*/new Vector3();

	var _m1 = /*@__PURE__*/new Matrix4();

	var _zero = /*@__PURE__*/new Vector3(0, 0, 0);

	var _one = /*@__PURE__*/new Vector3(1, 1, 1);

	var _x = /*@__PURE__*/new Vector3();

	var _y = /*@__PURE__*/new Vector3();

	var _z = /*@__PURE__*/new Vector3();

	var Euler = /*#__PURE__*/function () {
		function Euler(x, y, z, order) {
			if (x === void 0) {
				x = 0;
			}

			if (y === void 0) {
				y = 0;
			}

			if (z === void 0) {
				z = 0;
			}

			if (order === void 0) {
				order = Euler.DefaultOrder;
			}

			Object.defineProperty(this, 'isEuler', {
				value: true
			});
			this._x = x;
			this._y = y;
			this._z = z;
			this._order = order;
		}

		var _proto = Euler.prototype;

		_proto.set = function set(x, y, z, order) {
			this._x = x;
			this._y = y;
			this._z = z;
			this._order = order || this._order;

			this._onChangeCallback();

			return this;
		};

		_proto.clone = function clone() {
			return new this.constructor(this._x, this._y, this._z, this._order);
		};

		_proto.copy = function copy(euler) {
			this._x = euler._x;
			this._y = euler._y;
			this._z = euler._z;
			this._order = euler._order;

			this._onChangeCallback();

			return this;
		};

		_proto.setFromRotationMatrix = function setFromRotationMatrix(m, order, update) {
			var clamp = MathUtils.clamp; // assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

			var te = m.elements;
			var m11 = te[0],
					m12 = te[4],
					m13 = te[8];
			var m21 = te[1],
					m22 = te[5],
					m23 = te[9];
			var m31 = te[2],
					m32 = te[6],
					m33 = te[10];
			order = order || this._order;

			switch (order) {
				case 'XYZ':
					this._y = Math.asin(clamp(m13, -1, 1));

					if (Math.abs(m13) < 0.9999999) {
						this._x = Math.atan2(-m23, m33);
						this._z = Math.atan2(-m12, m11);
					} else {
						this._x = Math.atan2(m32, m22);
						this._z = 0;
					}

					break;

				case 'YXZ':
					this._x = Math.asin(-clamp(m23, -1, 1));

					if (Math.abs(m23) < 0.9999999) {
						this._y = Math.atan2(m13, m33);
						this._z = Math.atan2(m21, m22);
					} else {
						this._y = Math.atan2(-m31, m11);
						this._z = 0;
					}

					break;

				case 'ZXY':
					this._x = Math.asin(clamp(m32, -1, 1));

					if (Math.abs(m32) < 0.9999999) {
						this._y = Math.atan2(-m31, m33);
						this._z = Math.atan2(-m12, m22);
					} else {
						this._y = 0;
						this._z = Math.atan2(m21, m11);
					}

					break;

				case 'ZYX':
					this._y = Math.asin(-clamp(m31, -1, 1));

					if (Math.abs(m31) < 0.9999999) {
						this._x = Math.atan2(m32, m33);
						this._z = Math.atan2(m21, m11);
					} else {
						this._x = 0;
						this._z = Math.atan2(-m12, m22);
					}

					break;

				case 'YZX':
					this._z = Math.asin(clamp(m21, -1, 1));

					if (Math.abs(m21) < 0.9999999) {
						this._x = Math.atan2(-m23, m22);
						this._y = Math.atan2(-m31, m11);
					} else {
						this._x = 0;
						this._y = Math.atan2(m13, m33);
					}

					break;

				case 'XZY':
					this._z = Math.asin(-clamp(m12, -1, 1));

					if (Math.abs(m12) < 0.9999999) {
						this._x = Math.atan2(m32, m22);
						this._y = Math.atan2(m13, m11);
					} else {
						this._x = Math.atan2(-m23, m33);
						this._y = 0;
					}

					break;

				default:
					console.warn('THREE.Euler: .setFromRotationMatrix() encountered an unknown order: ' + order);
			}

			this._order = order;
			if (update !== false) this._onChangeCallback();
			return this;
		};

		_proto.setFromQuaternion = function setFromQuaternion(q, order, update) {
			_matrix.makeRotationFromQuaternion(q);

			return this.setFromRotationMatrix(_matrix, order, update);
		};

		_proto.setFromVector3 = function setFromVector3(v, order) {
			return this.set(v.x, v.y, v.z, order || this._order);
		};

		_proto.reorder = function reorder(newOrder) {
			// WARNING: this discards revolution information -bhouston
			_quaternion$1.setFromEuler(this);

			return this.setFromQuaternion(_quaternion$1, newOrder);
		};

		_proto.equals = function equals(euler) {
			return euler._x === this._x && euler._y === this._y && euler._z === this._z && euler._order === this._order;
		};

		_proto.fromArray = function fromArray(array) {
			this._x = array[0];
			this._y = array[1];
			this._z = array[2];
			if (array[3] !== undefined) this._order = array[3];

			this._onChangeCallback();

			return this;
		};

		_proto.toArray = function toArray(array, offset) {
			if (array === void 0) {
				array = [];
			}

			if (offset === void 0) {
				offset = 0;
			}

			array[offset] = this._x;
			array[offset + 1] = this._y;
			array[offset + 2] = this._z;
			array[offset + 3] = this._order;
			return array;
		};

		_proto.toVector3 = function toVector3(optionalResult) {
			if (optionalResult) {
				return optionalResult.set(this._x, this._y, this._z);
			} else {
				return new Vector3(this._x, this._y, this._z);
			}
		};

		_proto._onChange = function _onChange(callback) {
			this._onChangeCallback = callback;
			return this;
		};

		_proto._onChangeCallback = function _onChangeCallback() {};

		_createClass(Euler, [{
			key: "x",
			get: function get() {
				return this._x;
			},
			set: function set(value) {
				this._x = value;

				this._onChangeCallback();
			}
		}, {
			key: "y",
			get: function get() {
				return this._y;
			},
			set: function set(value) {
				this._y = value;

				this._onChangeCallback();
			}
		}, {
			key: "z",
			get: function get() {
				return this._z;
			},
			set: function set(value) {
				this._z = value;

				this._onChangeCallback();
			}
		}, {
			key: "order",
			get: function get() {
				return this._order;
			},
			set: function set(value) {
				this._order = value;

				this._onChangeCallback();
			}
		}]);

		return Euler;
	}();

	Euler.DefaultOrder = 'XYZ';
	Euler.RotationOrders = ['XYZ', 'YZX', 'ZXY', 'XZY', 'YXZ', 'ZYX'];

	var _matrix = /*@__PURE__*/new Matrix4();

	var _quaternion$1 = /*@__PURE__*/new Quaternion();

	var Layers = /*#__PURE__*/function () {
		function Layers() {
			this.mask = 1 | 0;
		}

		var _proto = Layers.prototype;

		_proto.set = function set(channel) {
			this.mask = 1 << channel | 0;
		};

		_proto.enable = function enable(channel) {
			this.mask |= 1 << channel | 0;
		};

		_proto.enableAll = function enableAll() {
			this.mask = 0xffffffff | 0;
		};

		_proto.toggle = function toggle(channel) {
			this.mask ^= 1 << channel | 0;
		};

		_proto.disable = function disable(channel) {
			this.mask &= ~(1 << channel | 0);
		};

		_proto.disableAll = function disableAll() {
			this.mask = 0;
		};

		_proto.test = function test(layers) {
			return (this.mask & layers.mask) !== 0;
		};

		return Layers;
	}();

	var _object3DId = 0;

	var _v1$2 = new Vector3();

	var _q1 = new Quaternion();

	var _m1$1 = new Matrix4();

	var _target = new Vector3();

	var _position = new Vector3();

	var _scale = new Vector3();

	var _quaternion$2 = new Quaternion();

	var _xAxis = new Vector3(1, 0, 0);

	var _yAxis = new Vector3(0, 1, 0);

	var _zAxis = new Vector3(0, 0, 1);

	var _addedEvent = {
		type: 'added'
	};
	var _removedEvent = {
		type: 'removed'
	};

	function Object3D() {
		Object.defineProperty(this, 'id', {
			value: _object3DId++
		});
		this.uuid = MathUtils.generateUUID();
		this.name = '';
		this.type = 'Object3D';
		this.parent = null;
		this.children = [];
		this.up = Object3D.DefaultUp.clone();
		var position = new Vector3();
		var rotation = new Euler();
		var quaternion = new Quaternion();
		var scale = new Vector3(1, 1, 1);

		function onRotationChange() {
			quaternion.setFromEuler(rotation, false);
		}

		function onQuaternionChange() {
			rotation.setFromQuaternion(quaternion, undefined, false);
		}

		rotation._onChange(onRotationChange);

		quaternion._onChange(onQuaternionChange);

		Object.defineProperties(this, {
			position: {
				configurable: true,
				enumerable: true,
				value: position
			},
			rotation: {
				configurable: true,
				enumerable: true,
				value: rotation
			},
			quaternion: {
				configurable: true,
				enumerable: true,
				value: quaternion
			},
			scale: {
				configurable: true,
				enumerable: true,
				value: scale
			},
			modelViewMatrix: {
				value: new Matrix4()
			},
			normalMatrix: {
				value: new Matrix3()
			}
		});
		this.matrix = new Matrix4();
		this.matrixWorld = new Matrix4();
		this.matrixAutoUpdate = Object3D.DefaultMatrixAutoUpdate;
		this.matrixWorldNeedsUpdate = false;
		this.layers = new Layers();
		this.visible = true;
		this.castShadow = false;
		this.receiveShadow = false;
		this.frustumCulled = true;
		this.renderOrder = 0;
		this.animations = [];
		this.userData = {};
	}

	Object3D.DefaultUp = new Vector3(0, 1, 0);
	Object3D.DefaultMatrixAutoUpdate = true;
	Object3D.prototype = Object.assign(Object.create(EventDispatcher.prototype), {
		constructor: Object3D,
		isObject3D: true,
		onBeforeRender: function onBeforeRender() {},
		onAfterRender: function onAfterRender() {},
		applyMatrix4: function applyMatrix4(matrix) {
			if (this.matrixAutoUpdate) this.updateMatrix();
			this.matrix.premultiply(matrix);
			this.matrix.decompose(this.position, this.quaternion, this.scale);
		},
		applyQuaternion: function applyQuaternion(q) {
			this.quaternion.premultiply(q);
			return this;
		},
		setRotationFromAxisAngle: function setRotationFromAxisAngle(axis, angle) {
			// assumes axis is normalized
			this.quaternion.setFromAxisAngle(axis, angle);
		},
		setRotationFromEuler: function setRotationFromEuler(euler) {
			this.quaternion.setFromEuler(euler, true);
		},
		setRotationFromMatrix: function setRotationFromMatrix(m) {
			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)
			this.quaternion.setFromRotationMatrix(m);
		},
		setRotationFromQuaternion: function setRotationFromQuaternion(q) {
			// assumes q is normalized
			this.quaternion.copy(q);
		},
		rotateOnAxis: function rotateOnAxis(axis, angle) {
			// rotate object on axis in object space
			// axis is assumed to be normalized
			_q1.setFromAxisAngle(axis, angle);

			this.quaternion.multiply(_q1);
			return this;
		},
		rotateOnWorldAxis: function rotateOnWorldAxis(axis, angle) {
			// rotate object on axis in world space
			// axis is assumed to be normalized
			// method assumes no rotated parent
			_q1.setFromAxisAngle(axis, angle);

			this.quaternion.premultiply(_q1);
			return this;
		},
		rotateX: function rotateX(angle) {
			return this.rotateOnAxis(_xAxis, angle);
		},
		rotateY: function rotateY(angle) {
			return this.rotateOnAxis(_yAxis, angle);
		},
		rotateZ: function rotateZ(angle) {
			return this.rotateOnAxis(_zAxis, angle);
		},
		translateOnAxis: function translateOnAxis(axis, distance) {
			// translate object by distance along axis in object space
			// axis is assumed to be normalized
			_v1$2.copy(axis).applyQuaternion(this.quaternion);

			this.position.add(_v1$2.multiplyScalar(distance));
			return this;
		},
		translateX: function translateX(distance) {
			return this.translateOnAxis(_xAxis, distance);
		},
		translateY: function translateY(distance) {
			return this.translateOnAxis(_yAxis, distance);
		},
		translateZ: function translateZ(distance) {
			return this.translateOnAxis(_zAxis, distance);
		},
		localToWorld: function localToWorld(vector) {
			return vector.applyMatrix4(this.matrixWorld);
		},
		worldToLocal: function worldToLocal(vector) {
			return vector.applyMatrix4(_m1$1.copy(this.matrixWorld).invert());
		},
		lookAt: function lookAt(x, y, z) {
			// This method does not support objects having non-uniformly-scaled parent(s)
			if (x.isVector3) {
				_target.copy(x);
			} else {
				_target.set(x, y, z);
			}

			var parent = this.parent;
			this.updateWorldMatrix(true, false);

			_position.setFromMatrixPosition(this.matrixWorld);

			if (this.isCamera || this.isLight) {
				_m1$1.lookAt(_position, _target, this.up);
			} else {
				_m1$1.lookAt(_target, _position, this.up);
			}

			this.quaternion.setFromRotationMatrix(_m1$1);

			if (parent) {
				_m1$1.extractRotation(parent.matrixWorld);

				_q1.setFromRotationMatrix(_m1$1);

				this.quaternion.premultiply(_q1.invert());
			}
		},
		add: function add(object) {
			if (arguments.length > 1) {
				for (var i = 0; i < arguments.length; i++) {
					this.add(arguments[i]);
				}

				return this;
			}

			if (object === this) {
				console.error('THREE.Object3D.add: object can\'t be added as a child of itself.', object);
				return this;
			}

			if (object && object.isObject3D) {
				if (object.parent !== null) {
					object.parent.remove(object);
				}

				object.parent = this;
				this.children.push(object);
				object.dispatchEvent(_addedEvent);
			} else {
				console.error('THREE.Object3D.add: object not an instance of THREE.Object3D.', object);
			}

			return this;
		},
		remove: function remove(object) {
			if (arguments.length > 1) {
				for (var i = 0; i < arguments.length; i++) {
					this.remove(arguments[i]);
				}

				return this;
			}

			var index = this.children.indexOf(object);

			if (index !== -1) {
				object.parent = null;
				this.children.splice(index, 1);
				object.dispatchEvent(_removedEvent);
			}

			return this;
		},
		clear: function clear() {
			for (var i = 0; i < this.children.length; i++) {
				var object = this.children[i];
				object.parent = null;
				object.dispatchEvent(_removedEvent);
			}

			this.children.length = 0;
			return this;
		},
		attach: function attach(object) {
			// adds object as a child of this, while maintaining the object's world transform
			this.updateWorldMatrix(true, false);

			_m1$1.copy(this.matrixWorld).invert();

			if (object.parent !== null) {
				object.parent.updateWorldMatrix(true, false);

				_m1$1.multiply(object.parent.matrixWorld);
			}

			object.applyMatrix4(_m1$1);
			object.updateWorldMatrix(false, false);
			this.add(object);
			return this;
		},
		getObjectById: function getObjectById(id) {
			return this.getObjectByProperty('id', id);
		},
		getObjectByName: function getObjectByName(name) {
			return this.getObjectByProperty('name', name);
		},
		getObjectByProperty: function getObjectByProperty(name, value) {
			if (this[name] === value) return this;

			for (var i = 0, l = this.children.length; i < l; i++) {
				var child = this.children[i];
				var object = child.getObjectByProperty(name, value);

				if (object !== undefined) {
					return object;
				}
			}

			return undefined;
		},
		getWorldPosition: function getWorldPosition(target) {
			if (target === undefined) {
				console.warn('THREE.Object3D: .getWorldPosition() target is now required');
				target = new Vector3();
			}

			this.updateWorldMatrix(true, false);
			return target.setFromMatrixPosition(this.matrixWorld);
		},
		getWorldQuaternion: function getWorldQuaternion(target) {
			if (target === undefined) {
				console.warn('THREE.Object3D: .getWorldQuaternion() target is now required');
				target = new Quaternion();
			}

			this.updateWorldMatrix(true, false);
			this.matrixWorld.decompose(_position, target, _scale);
			return target;
		},
		getWorldScale: function getWorldScale(target) {
			if (target === undefined) {
				console.warn('THREE.Object3D: .getWorldScale() target is now required');
				target = new Vector3();
			}

			this.updateWorldMatrix(true, false);
			this.matrixWorld.decompose(_position, _quaternion$2, target);
			return target;
		},
		getWorldDirection: function getWorldDirection(target) {
			if (target === undefined) {
				console.warn('THREE.Object3D: .getWorldDirection() target is now required');
				target = new Vector3();
			}

			this.updateWorldMatrix(true, false);
			var e = this.matrixWorld.elements;
			return target.set(e[8], e[9], e[10]).normalize();
		},
		raycast: function raycast() {},
		traverse: function traverse(callback) {
			callback(this);
			var children = this.children;

			for (var i = 0, l = children.length; i < l; i++) {
				children[i].traverse(callback);
			}
		},
		traverseVisible: function traverseVisible(callback) {
			if (this.visible === false) return;
			callback(this);
			var children = this.children;

			for (var i = 0, l = children.length; i < l; i++) {
				children[i].traverseVisible(callback);
			}
		},
		traverseAncestors: function traverseAncestors(callback) {
			var parent = this.parent;

			if (parent !== null) {
				callback(parent);
				parent.traverseAncestors(callback);
			}
		},
		updateMatrix: function updateMatrix() {
			this.matrix.compose(this.position, this.quaternion, this.scale);
			this.matrixWorldNeedsUpdate = true;
		},
		updateMatrixWorld: function updateMatrixWorld(force) {
			if (this.matrixAutoUpdate) this.updateMatrix();

			if (this.matrixWorldNeedsUpdate || force) {
				if (this.parent === null) {
					this.matrixWorld.copy(this.matrix);
				} else {
					this.matrixWorld.multiplyMatrices(this.parent.matrixWorld, this.matrix);
				}

				this.matrixWorldNeedsUpdate = false;
				force = true;
			} // update children


			var children = this.children;

			for (var i = 0, l = children.length; i < l; i++) {
				children[i].updateMatrixWorld(force);
			}
		},
		updateWorldMatrix: function updateWorldMatrix(updateParents, updateChildren) {
			var parent = this.parent;

			if (updateParents === true && parent !== null) {
				parent.updateWorldMatrix(true, false);
			}

			if (this.matrixAutoUpdate) this.updateMatrix();

			if (this.parent === null) {
				this.matrixWorld.copy(this.matrix);
			} else {
				this.matrixWorld.multiplyMatrices(this.parent.matrixWorld, this.matrix);
			} // update children


			if (updateChildren === true) {
				var children = this.children;

				for (var i = 0, l = children.length; i < l; i++) {
					children[i].updateWorldMatrix(false, true);
				}
			}
		},
		toJSON: function toJSON(meta) {
			// meta is a string when called from JSON.stringify
			var isRootObject = meta === undefined || typeof meta === 'string';
			var output = {}; // meta is a hash used to collect geometries, materials.
			// not providing it implies that this is the root object
			// being serialized.

			if (isRootObject) {
				// initialize meta obj
				meta = {
					geometries: {},
					materials: {},
					textures: {},
					images: {},
					shapes: {},
					skeletons: {},
					animations: {}
				};
				output.metadata = {
					version: 4.5,
					type: 'Object',
					generator: 'Object3D.toJSON'
				};
			} // standard Object3D serialization


			var object = {};
			object.uuid = this.uuid;
			object.type = this.type;
			if (this.name !== '') object.name = this.name;
			if (this.castShadow === true) object.castShadow = true;
			if (this.receiveShadow === true) object.receiveShadow = true;
			if (this.visible === false) object.visible = false;
			if (this.frustumCulled === false) object.frustumCulled = false;
			if (this.renderOrder !== 0) object.renderOrder = this.renderOrder;
			if (JSON.stringify(this.userData) !== '{}') object.userData = this.userData;
			object.layers = this.layers.mask;
			object.matrix = this.matrix.toArray();
			if (this.matrixAutoUpdate === false) object.matrixAutoUpdate = false; // object specific properties

			if (this.isInstancedMesh) {
				object.type = 'InstancedMesh';
				object.count = this.count;
				object.instanceMatrix = this.instanceMatrix.toJSON();
			} //


			function serialize(library, element) {
				if (library[element.uuid] === undefined) {
					library[element.uuid] = element.toJSON(meta);
				}

				return element.uuid;
			}

			if (this.isMesh || this.isLine || this.isPoints) {
				object.geometry = serialize(meta.geometries, this.geometry);
				var parameters = this.geometry.parameters;

				if (parameters !== undefined && parameters.shapes !== undefined) {
					var shapes = parameters.shapes;

					if (Array.isArray(shapes)) {
						for (var i = 0, l = shapes.length; i < l; i++) {
							var shape = shapes[i];
							serialize(meta.shapes, shape);
						}
					} else {
						serialize(meta.shapes, shapes);
					}
				}
			}

			if (this.isSkinnedMesh) {
				object.bindMode = this.bindMode;
				object.bindMatrix = this.bindMatrix.toArray();

				if (this.skeleton !== undefined) {
					serialize(meta.skeletons, this.skeleton);
					object.skeleton = this.skeleton.uuid;
				}
			}

			if (this.material !== undefined) {
				if (Array.isArray(this.material)) {
					var uuids = [];

					for (var _i = 0, _l = this.material.length; _i < _l; _i++) {
						uuids.push(serialize(meta.materials, this.material[_i]));
					}

					object.material = uuids;
				} else {
					object.material = serialize(meta.materials, this.material);
				}
			} //


			if (this.children.length > 0) {
				object.children = [];

				for (var _i2 = 0; _i2 < this.children.length; _i2++) {
					object.children.push(this.children[_i2].toJSON(meta).object);
				}
			} //


			if (this.animations.length > 0) {
				object.animations = [];

				for (var _i3 = 0; _i3 < this.animations.length; _i3++) {
					var animation = this.animations[_i3];
					object.animations.push(serialize(meta.animations, animation));
				}
			}

			if (isRootObject) {
				var geometries = extractFromCache(meta.geometries);
				var materials = extractFromCache(meta.materials);
				var textures = extractFromCache(meta.textures);
				var images = extractFromCache(meta.images);

				var _shapes = extractFromCache(meta.shapes);

				var skeletons = extractFromCache(meta.skeletons);
				var animations = extractFromCache(meta.animations);
				if (geometries.length > 0) output.geometries = geometries;
				if (materials.length > 0) output.materials = materials;
				if (textures.length > 0) output.textures = textures;
				if (images.length > 0) output.images = images;
				if (_shapes.length > 0) output.shapes = _shapes;
				if (skeletons.length > 0) output.skeletons = skeletons;
				if (animations.length > 0) output.animations = animations;
			}

			output.object = object;
			return output; // extract data from the cache hash
			// remove metadata on each item
			// and return as array

			function extractFromCache(cache) {
				var values = [];

				for (var key in cache) {
					var data = cache[key];
					delete data.metadata;
					values.push(data);
				}

				return values;
			}
		},
		clone: function clone(recursive) {
			return new this.constructor().copy(this, recursive);
		},
		copy: function copy(source, recursive) {
			if (recursive === void 0) {
				recursive = true;
			}

			this.name = source.name;
			this.up.copy(source.up);
			this.position.copy(source.position);
			this.rotation.order = source.rotation.order;
			this.quaternion.copy(source.quaternion);
			this.scale.copy(source.scale);
			this.matrix.copy(source.matrix);
			this.matrixWorld.copy(source.matrixWorld);
			this.matrixAutoUpdate = source.matrixAutoUpdate;
			this.matrixWorldNeedsUpdate = source.matrixWorldNeedsUpdate;
			this.layers.mask = source.layers.mask;
			this.visible = source.visible;
			this.castShadow = source.castShadow;
			this.receiveShadow = source.receiveShadow;
			this.frustumCulled = source.frustumCulled;
			this.renderOrder = source.renderOrder;
			this.userData = JSON.parse(JSON.stringify(source.userData));

			if (recursive === true) {
				for (var i = 0; i < source.children.length; i++) {
					var child = source.children[i];
					this.add(child.clone());
				}
			}

			return this;
		}
	});

	var _vector1 = /*@__PURE__*/new Vector3();

	var _vector2 = /*@__PURE__*/new Vector3();

	var _normalMatrix = /*@__PURE__*/new Matrix3();

	var Plane = /*#__PURE__*/function () {
		function Plane(normal, constant) {
			Object.defineProperty(this, 'isPlane', {
				value: true
			}); // normal is assumed to be normalized

			this.normal = normal !== undefined ? normal : new Vector3(1, 0, 0);
			this.constant = constant !== undefined ? constant : 0;
		}

		var _proto = Plane.prototype;

		_proto.set = function set(normal, constant) {
			this.normal.copy(normal);
			this.constant = constant;
			return this;
		};

		_proto.setComponents = function setComponents(x, y, z, w) {
			this.normal.set(x, y, z);
			this.constant = w;
			return this;
		};

		_proto.setFromNormalAndCoplanarPoint = function setFromNormalAndCoplanarPoint(normal, point) {
			this.normal.copy(normal);
			this.constant = -point.dot(this.normal);
			return this;
		};

		_proto.setFromCoplanarPoints = function setFromCoplanarPoints(a, b, c) {
			var normal = _vector1.subVectors(c, b).cross(_vector2.subVectors(a, b)).normalize(); // Q: should an error be thrown if normal is zero (e.g. degenerate plane)?


			this.setFromNormalAndCoplanarPoint(normal, a);
			return this;
		};

		_proto.clone = function clone() {
			return new this.constructor().copy(this);
		};

		_proto.copy = function copy(plane) {
			this.normal.copy(plane.normal);
			this.constant = plane.constant;
			return this;
		};

		_proto.normalize = function normalize() {
			// Note: will lead to a divide by zero if the plane is invalid.
			var inverseNormalLength = 1.0 / this.normal.length();
			this.normal.multiplyScalar(inverseNormalLength);
			this.constant *= inverseNormalLength;
			return this;
		};

		_proto.negate = function negate() {
			this.constant *= -1;
			this.normal.negate();
			return this;
		};

		_proto.distanceToPoint = function distanceToPoint(point) {
			return this.normal.dot(point) + this.constant;
		};

		_proto.distanceToSphere = function distanceToSphere(sphere) {
			return this.distanceToPoint(sphere.center) - sphere.radius;
		};

		_proto.projectPoint = function projectPoint(point, target) {
			if (target === undefined) {
				console.warn('THREE.Plane: .projectPoint() target is now required');
				target = new Vector3();
			}

			return target.copy(this.normal).multiplyScalar(-this.distanceToPoint(point)).add(point);
		};

		_proto.intersectLine = function intersectLine(line, target) {
			if (target === undefined) {
				console.warn('THREE.Plane: .intersectLine() target is now required');
				target = new Vector3();
			}

			var direction = line.delta(_vector1);
			var denominator = this.normal.dot(direction);

			if (denominator === 0) {
				// line is coplanar, return origin
				if (this.distanceToPoint(line.start) === 0) {
					return target.copy(line.start);
				} // Unsure if this is the correct method to handle this case.


				return undefined;
			}

			var t = -(line.start.dot(this.normal) + this.constant) / denominator;

			if (t < 0 || t > 1) {
				return undefined;
			}

			return target.copy(direction).multiplyScalar(t).add(line.start);
		};

		_proto.intersectsLine = function intersectsLine(line) {
			// Note: this tests if a line intersects the plane, not whether it (or its end-points) are coplanar with it.
			var startSign = this.distanceToPoint(line.start);
			var endSign = this.distanceToPoint(line.end);
			return startSign < 0 && endSign > 0 || endSign < 0 && startSign > 0;
		};

		_proto.intersectsBox = function intersectsBox(box) {
			return box.intersectsPlane(this);
		};

		_proto.intersectsSphere = function intersectsSphere(sphere) {
			return sphere.intersectsPlane(this);
		};

		_proto.coplanarPoint = function coplanarPoint(target) {
			if (target === undefined) {
				console.warn('THREE.Plane: .coplanarPoint() target is now required');
				target = new Vector3();
			}

			return target.copy(this.normal).multiplyScalar(-this.constant);
		};

		_proto.applyMatrix4 = function applyMatrix4(matrix, optionalNormalMatrix) {
			var normalMatrix = optionalNormalMatrix || _normalMatrix.getNormalMatrix(matrix);

			var referencePoint = this.coplanarPoint(_vector1).applyMatrix4(matrix);
			var normal = this.normal.applyMatrix3(normalMatrix).normalize();
			this.constant = -referencePoint.dot(normal);
			return this;
		};

		_proto.translate = function translate(offset) {
			this.constant -= offset.dot(this.normal);
			return this;
		};

		_proto.equals = function equals(plane) {
			return plane.normal.equals(this.normal) && plane.constant === this.constant;
		};

		return Plane;
	}();

	var _v0$1 = /*@__PURE__*/new Vector3();

	var _v1$3 = /*@__PURE__*/new Vector3();

	var _v2$1 = /*@__PURE__*/new Vector3();

	var _v3 = /*@__PURE__*/new Vector3();

	var _vab = /*@__PURE__*/new Vector3();

	var _vac = /*@__PURE__*/new Vector3();

	var _vbc = /*@__PURE__*/new Vector3();

	var _vap = /*@__PURE__*/new Vector3();

	var _vbp = /*@__PURE__*/new Vector3();

	var _vcp = /*@__PURE__*/new Vector3();

	var Triangle = /*#__PURE__*/function () {
		function Triangle(a, b, c) {
			this.a = a !== undefined ? a : new Vector3();
			this.b = b !== undefined ? b : new Vector3();
			this.c = c !== undefined ? c : new Vector3();
		}

		Triangle.getNormal = function getNormal(a, b, c, target) {
			if (target === undefined) {
				console.warn('THREE.Triangle: .getNormal() target is now required');
				target = new Vector3();
			}

			target.subVectors(c, b);

			_v0$1.subVectors(a, b);

			target.cross(_v0$1);
			var targetLengthSq = target.lengthSq();

			if (targetLengthSq > 0) {
				return target.multiplyScalar(1 / Math.sqrt(targetLengthSq));
			}

			return target.set(0, 0, 0);
		} // static/instance method to calculate barycentric coordinates
		// based on: http://www.blackpawn.com/texts/pointinpoly/default.html
		;

		Triangle.getBarycoord = function getBarycoord(point, a, b, c, target) {
			_v0$1.subVectors(c, a);

			_v1$3.subVectors(b, a);

			_v2$1.subVectors(point, a);

			var dot00 = _v0$1.dot(_v0$1);

			var dot01 = _v0$1.dot(_v1$3);

			var dot02 = _v0$1.dot(_v2$1);

			var dot11 = _v1$3.dot(_v1$3);

			var dot12 = _v1$3.dot(_v2$1);

			var denom = dot00 * dot11 - dot01 * dot01;

			if (target === undefined) {
				console.warn('THREE.Triangle: .getBarycoord() target is now required');
				target = new Vector3();
			} // collinear or singular triangle


			if (denom === 0) {
				// arbitrary location outside of triangle?
				// not sure if this is the best idea, maybe should be returning undefined
				return target.set(-2, -1, -1);
			}

			var invDenom = 1 / denom;
			var u = (dot11 * dot02 - dot01 * dot12) * invDenom;
			var v = (dot00 * dot12 - dot01 * dot02) * invDenom; // barycentric coordinates must always sum to 1

			return target.set(1 - u - v, v, u);
		};

		Triangle.containsPoint = function containsPoint(point, a, b, c) {
			this.getBarycoord(point, a, b, c, _v3);
			return _v3.x >= 0 && _v3.y >= 0 && _v3.x + _v3.y <= 1;
		};

		Triangle.getUV = function getUV(point, p1, p2, p3, uv1, uv2, uv3, target) {
			this.getBarycoord(point, p1, p2, p3, _v3);
			target.set(0, 0);
			target.addScaledVector(uv1, _v3.x);
			target.addScaledVector(uv2, _v3.y);
			target.addScaledVector(uv3, _v3.z);
			return target;
		};

		Triangle.isFrontFacing = function isFrontFacing(a, b, c, direction) {
			_v0$1.subVectors(c, b);

			_v1$3.subVectors(a, b); // strictly front facing


			return _v0$1.cross(_v1$3).dot(direction) < 0 ? true : false;
		};

		var _proto = Triangle.prototype;

		_proto.set = function set(a, b, c) {
			this.a.copy(a);
			this.b.copy(b);
			this.c.copy(c);
			return this;
		};

		_proto.setFromPointsAndIndices = function setFromPointsAndIndices(points, i0, i1, i2) {
			this.a.copy(points[i0]);
			this.b.copy(points[i1]);
			this.c.copy(points[i2]);
			return this;
		};

		_proto.clone = function clone() {
			return new this.constructor().copy(this);
		};

		_proto.copy = function copy(triangle) {
			this.a.copy(triangle.a);
			this.b.copy(triangle.b);
			this.c.copy(triangle.c);
			return this;
		};

		_proto.getArea = function getArea() {
			_v0$1.subVectors(this.c, this.b);

			_v1$3.subVectors(this.a, this.b);

			return _v0$1.cross(_v1$3).length() * 0.5;
		};

		_proto.getMidpoint = function getMidpoint(target) {
			if (target === undefined) {
				console.warn('THREE.Triangle: .getMidpoint() target is now required');
				target = new Vector3();
			}

			return target.addVectors(this.a, this.b).add(this.c).multiplyScalar(1 / 3);
		};

		_proto.getNormal = function getNormal(target) {
			return Triangle.getNormal(this.a, this.b, this.c, target);
		};

		_proto.getPlane = function getPlane(target) {
			if (target === undefined) {
				console.warn('THREE.Triangle: .getPlane() target is now required');
				target = new Plane();
			}

			return target.setFromCoplanarPoints(this.a, this.b, this.c);
		};

		_proto.getBarycoord = function getBarycoord(point, target) {
			return Triangle.getBarycoord(point, this.a, this.b, this.c, target);
		};

		_proto.getUV = function getUV(point, uv1, uv2, uv3, target) {
			return Triangle.getUV(point, this.a, this.b, this.c, uv1, uv2, uv3, target);
		};

		_proto.containsPoint = function containsPoint(point) {
			return Triangle.containsPoint(point, this.a, this.b, this.c);
		};

		_proto.isFrontFacing = function isFrontFacing(direction) {
			return Triangle.isFrontFacing(this.a, this.b, this.c, direction);
		};

		_proto.intersectsBox = function intersectsBox(box) {
			return box.intersectsTriangle(this);
		};

		_proto.closestPointToPoint = function closestPointToPoint(p, target) {
			if (target === undefined) {
				console.warn('THREE.Triangle: .closestPointToPoint() target is now required');
				target = new Vector3();
			}

			var a = this.a,
					b = this.b,
					c = this.c;
			var v, w; // algorithm thanks to Real-Time Collision Detection by Christer Ericson,
			// published by Morgan Kaufmann Publishers, (c) 2005 Elsevier Inc.,
			// under the accompanying license; see chapter 5.1.5 for detailed explanation.
			// basically, we're distinguishing which of the voronoi regions of the triangle
			// the point lies in with the minimum amount of redundant computation.

			_vab.subVectors(b, a);

			_vac.subVectors(c, a);

			_vap.subVectors(p, a);

			var d1 = _vab.dot(_vap);

			var d2 = _vac.dot(_vap);

			if (d1 <= 0 && d2 <= 0) {
				// vertex region of A; barycentric coords (1, 0, 0)
				return target.copy(a);
			}

			_vbp.subVectors(p, b);

			var d3 = _vab.dot(_vbp);

			var d4 = _vac.dot(_vbp);

			if (d3 >= 0 && d4 <= d3) {
				// vertex region of B; barycentric coords (0, 1, 0)
				return target.copy(b);
			}

			var vc = d1 * d4 - d3 * d2;

			if (vc <= 0 && d1 >= 0 && d3 <= 0) {
				v = d1 / (d1 - d3); // edge region of AB; barycentric coords (1-v, v, 0)

				return target.copy(a).addScaledVector(_vab, v);
			}

			_vcp.subVectors(p, c);

			var d5 = _vab.dot(_vcp);

			var d6 = _vac.dot(_vcp);

			if (d6 >= 0 && d5 <= d6) {
				// vertex region of C; barycentric coords (0, 0, 1)
				return target.copy(c);
			}

			var vb = d5 * d2 - d1 * d6;

			if (vb <= 0 && d2 >= 0 && d6 <= 0) {
				w = d2 / (d2 - d6); // edge region of AC; barycentric coords (1-w, 0, w)

				return target.copy(a).addScaledVector(_vac, w);
			}

			var va = d3 * d6 - d5 * d4;

			if (va <= 0 && d4 - d3 >= 0 && d5 - d6 >= 0) {
				_vbc.subVectors(c, b);

				w = (d4 - d3) / (d4 - d3 + (d5 - d6)); // edge region of BC; barycentric coords (0, 1-w, w)

				return target.copy(b).addScaledVector(_vbc, w); // edge region of BC
			} // face region


			var denom = 1 / (va + vb + vc); // u = va * denom

			v = vb * denom;
			w = vc * denom;
			return target.copy(a).addScaledVector(_vab, v).addScaledVector(_vac, w);
		};

		_proto.equals = function equals(triangle) {
			return triangle.a.equals(this.a) && triangle.b.equals(this.b) && triangle.c.equals(this.c);
		};

		return Triangle;
	}();

	var _colorKeywords = {
		'aliceblue': 0xF0F8FF,
		'antiquewhite': 0xFAEBD7,
		'aqua': 0x00FFFF,
		'aquamarine': 0x7FFFD4,
		'azure': 0xF0FFFF,
		'beige': 0xF5F5DC,
		'bisque': 0xFFE4C4,
		'black': 0x000000,
		'blanchedalmond': 0xFFEBCD,
		'blue': 0x0000FF,
		'blueviolet': 0x8A2BE2,
		'brown': 0xA52A2A,
		'burlywood': 0xDEB887,
		'cadetblue': 0x5F9EA0,
		'chartreuse': 0x7FFF00,
		'chocolate': 0xD2691E,
		'coral': 0xFF7F50,
		'cornflowerblue': 0x6495ED,
		'cornsilk': 0xFFF8DC,
		'crimson': 0xDC143C,
		'cyan': 0x00FFFF,
		'darkblue': 0x00008B,
		'darkcyan': 0x008B8B,
		'darkgoldenrod': 0xB8860B,
		'darkgray': 0xA9A9A9,
		'darkgreen': 0x006400,
		'darkgrey': 0xA9A9A9,
		'darkkhaki': 0xBDB76B,
		'darkmagenta': 0x8B008B,
		'darkolivegreen': 0x556B2F,
		'darkorange': 0xFF8C00,
		'darkorchid': 0x9932CC,
		'darkred': 0x8B0000,
		'darksalmon': 0xE9967A,
		'darkseagreen': 0x8FBC8F,
		'darkslateblue': 0x483D8B,
		'darkslategray': 0x2F4F4F,
		'darkslategrey': 0x2F4F4F,
		'darkturquoise': 0x00CED1,
		'darkviolet': 0x9400D3,
		'deeppink': 0xFF1493,
		'deepskyblue': 0x00BFFF,
		'dimgray': 0x696969,
		'dimgrey': 0x696969,
		'dodgerblue': 0x1E90FF,
		'firebrick': 0xB22222,
		'floralwhite': 0xFFFAF0,
		'forestgreen': 0x228B22,
		'fuchsia': 0xFF00FF,
		'gainsboro': 0xDCDCDC,
		'ghostwhite': 0xF8F8FF,
		'gold': 0xFFD700,
		'goldenrod': 0xDAA520,
		'gray': 0x808080,
		'green': 0x008000,
		'greenyellow': 0xADFF2F,
		'grey': 0x808080,
		'honeydew': 0xF0FFF0,
		'hotpink': 0xFF69B4,
		'indianred': 0xCD5C5C,
		'indigo': 0x4B0082,
		'ivory': 0xFFFFF0,
		'khaki': 0xF0E68C,
		'lavender': 0xE6E6FA,
		'lavenderblush': 0xFFF0F5,
		'lawngreen': 0x7CFC00,
		'lemonchiffon': 0xFFFACD,
		'lightblue': 0xADD8E6,
		'lightcoral': 0xF08080,
		'lightcyan': 0xE0FFFF,
		'lightgoldenrodyellow': 0xFAFAD2,
		'lightgray': 0xD3D3D3,
		'lightgreen': 0x90EE90,
		'lightgrey': 0xD3D3D3,
		'lightpink': 0xFFB6C1,
		'lightsalmon': 0xFFA07A,
		'lightseagreen': 0x20B2AA,
		'lightskyblue': 0x87CEFA,
		'lightslategray': 0x778899,
		'lightslategrey': 0x778899,
		'lightsteelblue': 0xB0C4DE,
		'lightyellow': 0xFFFFE0,
		'lime': 0x00FF00,
		'limegreen': 0x32CD32,
		'linen': 0xFAF0E6,
		'magenta': 0xFF00FF,
		'maroon': 0x800000,
		'mediumaquamarine': 0x66CDAA,
		'mediumblue': 0x0000CD,
		'mediumorchid': 0xBA55D3,
		'mediumpurple': 0x9370DB,
		'mediumseagreen': 0x3CB371,
		'mediumslateblue': 0x7B68EE,
		'mediumspringgreen': 0x00FA9A,
		'mediumturquoise': 0x48D1CC,
		'mediumvioletred': 0xC71585,
		'midnightblue': 0x191970,
		'mintcream': 0xF5FFFA,
		'mistyrose': 0xFFE4E1,
		'moccasin': 0xFFE4B5,
		'navajowhite': 0xFFDEAD,
		'navy': 0x000080,
		'oldlace': 0xFDF5E6,
		'olive': 0x808000,
		'olivedrab': 0x6B8E23,
		'orange': 0xFFA500,
		'orangered': 0xFF4500,
		'orchid': 0xDA70D6,
		'palegoldenrod': 0xEEE8AA,
		'palegreen': 0x98FB98,
		'paleturquoise': 0xAFEEEE,
		'palevioletred': 0xDB7093,
		'papayawhip': 0xFFEFD5,
		'peachpuff': 0xFFDAB9,
		'peru': 0xCD853F,
		'pink': 0xFFC0CB,
		'plum': 0xDDA0DD,
		'powderblue': 0xB0E0E6,
		'purple': 0x800080,
		'rebeccapurple': 0x663399,
		'red': 0xFF0000,
		'rosybrown': 0xBC8F8F,
		'royalblue': 0x4169E1,
		'saddlebrown': 0x8B4513,
		'salmon': 0xFA8072,
		'sandybrown': 0xF4A460,
		'seagreen': 0x2E8B57,
		'seashell': 0xFFF5EE,
		'sienna': 0xA0522D,
		'silver': 0xC0C0C0,
		'skyblue': 0x87CEEB,
		'slateblue': 0x6A5ACD,
		'slategray': 0x708090,
		'slategrey': 0x708090,
		'snow': 0xFFFAFA,
		'springgreen': 0x00FF7F,
		'steelblue': 0x4682B4,
		'tan': 0xD2B48C,
		'teal': 0x008080,
		'thistle': 0xD8BFD8,
		'tomato': 0xFF6347,
		'turquoise': 0x40E0D0,
		'violet': 0xEE82EE,
		'wheat': 0xF5DEB3,
		'white': 0xFFFFFF,
		'whitesmoke': 0xF5F5F5,
		'yellow': 0xFFFF00,
		'yellowgreen': 0x9ACD32
	};
	var _hslA = {
		h: 0,
		s: 0,
		l: 0
	};
	var _hslB = {
		h: 0,
		s: 0,
		l: 0
	};

	function hue2rgb(p, q, t) {
		if (t < 0) t += 1;
		if (t > 1) t -= 1;
		if (t < 1 / 6) return p + (q - p) * 6 * t;
		if (t < 1 / 2) return q;
		if (t < 2 / 3) return p + (q - p) * 6 * (2 / 3 - t);
		return p;
	}

	function SRGBToLinear(c) {
		return c < 0.04045 ? c * 0.0773993808 : Math.pow(c * 0.9478672986 + 0.0521327014, 2.4);
	}

	function LinearToSRGB(c) {
		return c < 0.0031308 ? c * 12.92 : 1.055 * Math.pow(c, 0.41666) - 0.055;
	}

	var Color = /*#__PURE__*/function () {
		function Color(r, g, b) {
			Object.defineProperty(this, 'isColor', {
				value: true
			});

			if (g === undefined && b === undefined) {
				// r is THREE.Color, hex or string
				return this.set(r);
			}

			return this.setRGB(r, g, b);
		}

		var _proto = Color.prototype;

		_proto.set = function set(value) {
			if (value && value.isColor) {
				this.copy(value);
			} else if (typeof value === 'number') {
				this.setHex(value);
			} else if (typeof value === 'string') {
				this.setStyle(value);
			}

			return this;
		};

		_proto.setScalar = function setScalar(scalar) {
			this.r = scalar;
			this.g = scalar;
			this.b = scalar;
			return this;
		};

		_proto.setHex = function setHex(hex) {
			hex = Math.floor(hex);
			this.r = (hex >> 16 & 255) / 255;
			this.g = (hex >> 8 & 255) / 255;
			this.b = (hex & 255) / 255;
			return this;
		};

		_proto.setRGB = function setRGB(r, g, b) {
			this.r = r;
			this.g = g;
			this.b = b;
			return this;
		};

		_proto.setHSL = function setHSL(h, s, l) {
			// h,s,l ranges are in 0.0 - 1.0
			h = MathUtils.euclideanModulo(h, 1);
			s = MathUtils.clamp(s, 0, 1);
			l = MathUtils.clamp(l, 0, 1);

			if (s === 0) {
				this.r = this.g = this.b = l;
			} else {
				var p = l <= 0.5 ? l * (1 + s) : l + s - l * s;
				var q = 2 * l - p;
				this.r = hue2rgb(q, p, h + 1 / 3);
				this.g = hue2rgb(q, p, h);
				this.b = hue2rgb(q, p, h - 1 / 3);
			}

			return this;
		};

		_proto.setStyle = function setStyle(style) {
			function handleAlpha(string) {
				if (string === undefined) return;

				if (parseFloat(string) < 1) {
					console.warn('THREE.Color: Alpha component of ' + style + ' will be ignored.');
				}
			}

			var m;

			if (m = /^((?:rgb|hsl)a?)\(([^\)]*)\)/.exec(style)) {
				// rgb / hsl
				var color;
				var name = m[1];
				var components = m[2];

				switch (name) {
					case 'rgb':
					case 'rgba':
						if (color = /^\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*(?:,\s*(\d*\.?\d+)\s*)?$/.exec(components)) {
							// rgb(255,0,0) rgba(255,0,0,0.5)
							this.r = Math.min(255, parseInt(color[1], 10)) / 255;
							this.g = Math.min(255, parseInt(color[2], 10)) / 255;
							this.b = Math.min(255, parseInt(color[3], 10)) / 255;
							handleAlpha(color[4]);
							return this;
						}

						if (color = /^\s*(\d+)\%\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(?:,\s*(\d*\.?\d+)\s*)?$/.exec(components)) {
							// rgb(100%,0%,0%) rgba(100%,0%,0%,0.5)
							this.r = Math.min(100, parseInt(color[1], 10)) / 100;
							this.g = Math.min(100, parseInt(color[2], 10)) / 100;
							this.b = Math.min(100, parseInt(color[3], 10)) / 100;
							handleAlpha(color[4]);
							return this;
						}

						break;

					case 'hsl':
					case 'hsla':
						if (color = /^\s*(\d*\.?\d+)\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(?:,\s*(\d*\.?\d+)\s*)?$/.exec(components)) {
							// hsl(120,50%,50%) hsla(120,50%,50%,0.5)
							var h = parseFloat(color[1]) / 360;
							var s = parseInt(color[2], 10) / 100;
							var l = parseInt(color[3], 10) / 100;
							handleAlpha(color[4]);
							return this.setHSL(h, s, l);
						}

						break;
				}
			} else if (m = /^\#([A-Fa-f\d]+)$/.exec(style)) {
				// hex color
				var hex = m[1];
				var size = hex.length;

				if (size === 3) {
					// #ff0
					this.r = parseInt(hex.charAt(0) + hex.charAt(0), 16) / 255;
					this.g = parseInt(hex.charAt(1) + hex.charAt(1), 16) / 255;
					this.b = parseInt(hex.charAt(2) + hex.charAt(2), 16) / 255;
					return this;
				} else if (size === 6) {
					// #ff0000
					this.r = parseInt(hex.charAt(0) + hex.charAt(1), 16) / 255;
					this.g = parseInt(hex.charAt(2) + hex.charAt(3), 16) / 255;
					this.b = parseInt(hex.charAt(4) + hex.charAt(5), 16) / 255;
					return this;
				}
			}

			if (style && style.length > 0) {
				return this.setColorName(style);
			}

			return this;
		};

		_proto.setColorName = function setColorName(style) {
			// color keywords
			var hex = _colorKeywords[style];

			if (hex !== undefined) {
				// red
				this.setHex(hex);
			} else {
				// unknown color
				console.warn('THREE.Color: Unknown color ' + style);
			}

			return this;
		};

		_proto.clone = function clone() {
			return new this.constructor(this.r, this.g, this.b);
		};

		_proto.copy = function copy(color) {
			this.r = color.r;
			this.g = color.g;
			this.b = color.b;
			return this;
		};

		_proto.copyGammaToLinear = function copyGammaToLinear(color, gammaFactor) {
			if (gammaFactor === void 0) {
				gammaFactor = 2.0;
			}

			this.r = Math.pow(color.r, gammaFactor);
			this.g = Math.pow(color.g, gammaFactor);
			this.b = Math.pow(color.b, gammaFactor);
			return this;
		};

		_proto.copyLinearToGamma = function copyLinearToGamma(color, gammaFactor) {
			if (gammaFactor === void 0) {
				gammaFactor = 2.0;
			}

			var safeInverse = gammaFactor > 0 ? 1.0 / gammaFactor : 1.0;
			this.r = Math.pow(color.r, safeInverse);
			this.g = Math.pow(color.g, safeInverse);
			this.b = Math.pow(color.b, safeInverse);
			return this;
		};

		_proto.convertGammaToLinear = function convertGammaToLinear(gammaFactor) {
			this.copyGammaToLinear(this, gammaFactor);
			return this;
		};

		_proto.convertLinearToGamma = function convertLinearToGamma(gammaFactor) {
			this.copyLinearToGamma(this, gammaFactor);
			return this;
		};

		_proto.copySRGBToLinear = function copySRGBToLinear(color) {
			this.r = SRGBToLinear(color.r);
			this.g = SRGBToLinear(color.g);
			this.b = SRGBToLinear(color.b);
			return this;
		};

		_proto.copyLinearToSRGB = function copyLinearToSRGB(color) {
			this.r = LinearToSRGB(color.r);
			this.g = LinearToSRGB(color.g);
			this.b = LinearToSRGB(color.b);
			return this;
		};

		_proto.convertSRGBToLinear = function convertSRGBToLinear() {
			this.copySRGBToLinear(this);
			return this;
		};

		_proto.convertLinearToSRGB = function convertLinearToSRGB() {
			this.copyLinearToSRGB(this);
			return this;
		};

		_proto.getHex = function getHex() {
			return this.r * 255 << 16 ^ this.g * 255 << 8 ^ this.b * 255 << 0;
		};

		_proto.getHexString = function getHexString() {
			return ('000000' + this.getHex().toString(16)).slice(-6);
		};

		_proto.getHSL = function getHSL(target) {
			// h,s,l ranges are in 0.0 - 1.0
			if (target === undefined) {
				console.warn('THREE.Color: .getHSL() target is now required');
				target = {
					h: 0,
					s: 0,
					l: 0
				};
			}

			var r = this.r,
					g = this.g,
					b = this.b;
			var max = Math.max(r, g, b);
			var min = Math.min(r, g, b);
			var hue, saturation;
			var lightness = (min + max) / 2.0;

			if (min === max) {
				hue = 0;
				saturation = 0;
			} else {
				var delta = max - min;
				saturation = lightness <= 0.5 ? delta / (max + min) : delta / (2 - max - min);

				switch (max) {
					case r:
						hue = (g - b) / delta + (g < b ? 6 : 0);
						break;

					case g:
						hue = (b - r) / delta + 2;
						break;

					case b:
						hue = (r - g) / delta + 4;
						break;
				}

				hue /= 6;
			}

			target.h = hue;
			target.s = saturation;
			target.l = lightness;
			return target;
		};

		_proto.getStyle = function getStyle() {
			return 'rgb(' + (this.r * 255 | 0) + ',' + (this.g * 255 | 0) + ',' + (this.b * 255 | 0) + ')';
		};

		_proto.offsetHSL = function offsetHSL(h, s, l) {
			this.getHSL(_hslA);
			_hslA.h += h;
			_hslA.s += s;
			_hslA.l += l;
			this.setHSL(_hslA.h, _hslA.s, _hslA.l);
			return this;
		};

		_proto.add = function add(color) {
			this.r += color.r;
			this.g += color.g;
			this.b += color.b;
			return this;
		};

		_proto.addColors = function addColors(color1, color2) {
			this.r = color1.r + color2.r;
			this.g = color1.g + color2.g;
			this.b = color1.b + color2.b;
			return this;
		};

		_proto.addScalar = function addScalar(s) {
			this.r += s;
			this.g += s;
			this.b += s;
			return this;
		};

		_proto.sub = function sub(color) {
			this.r = Math.max(0, this.r - color.r);
			this.g = Math.max(0, this.g - color.g);
			this.b = Math.max(0, this.b - color.b);
			return this;
		};

		_proto.multiply = function multiply(color) {
			this.r *= color.r;
			this.g *= color.g;
			this.b *= color.b;
			return this;
		};

		_proto.multiplyScalar = function multiplyScalar(s) {
			this.r *= s;
			this.g *= s;
			this.b *= s;
			return this;
		};

		_proto.lerp = function lerp(color, alpha) {
			this.r += (color.r - this.r) * alpha;
			this.g += (color.g - this.g) * alpha;
			this.b += (color.b - this.b) * alpha;
			return this;
		};

		_proto.lerpColors = function lerpColors(color1, color2, alpha) {
			this.r = color1.r + (color2.r - color1.r) * alpha;
			this.g = color1.g + (color2.g - color1.g) * alpha;
			this.b = color1.b + (color2.b - color1.b) * alpha;
			return this;
		};

		_proto.lerpHSL = function lerpHSL(color, alpha) {
			this.getHSL(_hslA);
			color.getHSL(_hslB);
			var h = MathUtils.lerp(_hslA.h, _hslB.h, alpha);
			var s = MathUtils.lerp(_hslA.s, _hslB.s, alpha);
			var l = MathUtils.lerp(_hslA.l, _hslB.l, alpha);
			this.setHSL(h, s, l);
			return this;
		};

		_proto.equals = function equals(c) {
			return c.r === this.r && c.g === this.g && c.b === this.b;
		};

		_proto.fromArray = function fromArray(array, offset) {
			if (offset === void 0) {
				offset = 0;
			}

			this.r = array[offset];
			this.g = array[offset + 1];
			this.b = array[offset + 2];
			return this;
		};

		_proto.toArray = function toArray(array, offset) {
			if (array === void 0) {
				array = [];
			}

			if (offset === void 0) {
				offset = 0;
			}

			array[offset] = this.r;
			array[offset + 1] = this.g;
			array[offset + 2] = this.b;
			return array;
		};

		_proto.fromBufferAttribute = function fromBufferAttribute(attribute, index) {
			this.r = attribute.getX(index);
			this.g = attribute.getY(index);
			this.b = attribute.getZ(index);

			if (attribute.normalized === true) {
				// assuming Uint8Array
				this.r /= 255;
				this.g /= 255;
				this.b /= 255;
			}

			return this;
		};

		_proto.toJSON = function toJSON() {
			return this.getHex();
		};

		return Color;
	}();

	Color.NAMES = _colorKeywords;
	Color.prototype.r = 1;
	Color.prototype.g = 1;
	Color.prototype.b = 1;

	var Face3 = /*#__PURE__*/function () {
		function Face3(a, b, c, normal, color, materialIndex) {
			if (materialIndex === void 0) {
				materialIndex = 0;
			}

			this.a = a;
			this.b = b;
			this.c = c;
			this.normal = normal && normal.isVector3 ? normal : new Vector3();
			this.vertexNormals = Array.isArray(normal) ? normal : [];
			this.color = color && color.isColor ? color : new Color();
			this.vertexColors = Array.isArray(color) ? color : [];
			this.materialIndex = materialIndex;
		}

		var _proto = Face3.prototype;

		_proto.clone = function clone() {
			return new this.constructor().copy(this);
		};

		_proto.copy = function copy(source) {
			this.a = source.a;
			this.b = source.b;
			this.c = source.c;
			this.normal.copy(source.normal);
			this.color.copy(source.color);
			this.materialIndex = source.materialIndex;

			for (var i = 0, il = source.vertexNormals.length; i < il; i++) {
				this.vertexNormals[i] = source.vertexNormals[i].clone();
			}

			for (var _i = 0, _il = source.vertexColors.length; _i < _il; _i++) {
				this.vertexColors[_i] = source.vertexColors[_i].clone();
			}

			return this;
		};

		return Face3;
	}();

	var materialId = 0;

	function Material() {
		Object.defineProperty(this, 'id', {
			value: materialId++
		});
		this.uuid = MathUtils.generateUUID();
		this.name = '';
		this.type = 'Material';
		this.fog = true;
		this.blending = NormalBlending;
		this.side = FrontSide;
		this.flatShading = false;
		this.vertexColors = false;
		this.opacity = 1;
		this.transparent = false;
		this.blendSrc = SrcAlphaFactor;
		this.blendDst = OneMinusSrcAlphaFactor;
		this.blendEquation = AddEquation;
		this.blendSrcAlpha = null;
		this.blendDstAlpha = null;
		this.blendEquationAlpha = null;
		this.depthFunc = LessEqualDepth;
		this.depthTest = true;
		this.depthWrite = true;
		this.stencilWriteMask = 0xff;
		this.stencilFunc = AlwaysStencilFunc;
		this.stencilRef = 0;
		this.stencilFuncMask = 0xff;
		this.stencilFail = KeepStencilOp;
		this.stencilZFail = KeepStencilOp;
		this.stencilZPass = KeepStencilOp;
		this.stencilWrite = false;
		this.clippingPlanes = null;
		this.clipIntersection = false;
		this.clipShadows = false;
		this.shadowSide = null;
		this.colorWrite = true;
		this.precision = null; // override the renderer's default precision for this material

		this.polygonOffset = false;
		this.polygonOffsetFactor = 0;
		this.polygonOffsetUnits = 0;
		this.dithering = false;
		this.alphaTest = 0;
		this.premultipliedAlpha = false;
		this.visible = true;
		this.toneMapped = true;
		this.userData = {};
		this.version = 0;
	}

	Material.prototype = Object.assign(Object.create(EventDispatcher.prototype), {
		constructor: Material,
		isMaterial: true,
		onBeforeCompile: function onBeforeCompile()
		/* shaderobject, renderer */
		{},
		customProgramCacheKey: function customProgramCacheKey() {
			return this.onBeforeCompile.toString();
		},
		setValues: function setValues(values) {
			if (values === undefined) return;

			for (var key in values) {
				var newValue = values[key];

				if (newValue === undefined) {
					console.warn('THREE.Material: \'' + key + '\' parameter is undefined.');
					continue;
				} // for backward compatability if shading is set in the constructor


				if (key === 'shading') {
					console.warn('THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.');
					this.flatShading = newValue === FlatShading ? true : false;
					continue;
				}

				var currentValue = this[key];

				if (currentValue === undefined) {
					console.warn('THREE.' + this.type + ': \'' + key + '\' is not a property of this material.');
					continue;
				}

				if (currentValue && currentValue.isColor) {
					currentValue.set(newValue);
				} else if (currentValue && currentValue.isVector3 && newValue && newValue.isVector3) {
					currentValue.copy(newValue);
				} else {
					this[key] = newValue;
				}
			}
		},
		toJSON: function toJSON(meta) {
			var isRoot = meta === undefined || typeof meta === 'string';

			if (isRoot) {
				meta = {
					textures: {},
					images: {}
				};
			}

			var data = {
				metadata: {
					version: 4.5,
					type: 'Material',
					generator: 'Material.toJSON'
				}
			}; // standard Material serialization

			data.uuid = this.uuid;
			data.type = this.type;
			if (this.name !== '') data.name = this.name;
			if (this.color && this.color.isColor) data.color = this.color.getHex();
			if (this.roughness !== undefined) data.roughness = this.roughness;
			if (this.metalness !== undefined) data.metalness = this.metalness;
			if (this.sheen && this.sheen.isColor) data.sheen = this.sheen.getHex();
			if (this.emissive && this.emissive.isColor) data.emissive = this.emissive.getHex();
			if (this.emissiveIntensity && this.emissiveIntensity !== 1) data.emissiveIntensity = this.emissiveIntensity;
			if (this.specular && this.specular.isColor) data.specular = this.specular.getHex();
			if (this.shininess !== undefined) data.shininess = this.shininess;
			if (this.clearcoat !== undefined) data.clearcoat = this.clearcoat;
			if (this.clearcoatRoughness !== undefined) data.clearcoatRoughness = this.clearcoatRoughness;

			if (this.clearcoatMap && this.clearcoatMap.isTexture) {
				data.clearcoatMap = this.clearcoatMap.toJSON(meta).uuid;
			}

			if (this.clearcoatRoughnessMap && this.clearcoatRoughnessMap.isTexture) {
				data.clearcoatRoughnessMap = this.clearcoatRoughnessMap.toJSON(meta).uuid;
			}

			if (this.clearcoatNormalMap && this.clearcoatNormalMap.isTexture) {
				data.clearcoatNormalMap = this.clearcoatNormalMap.toJSON(meta).uuid;
				data.clearcoatNormalScale = this.clearcoatNormalScale.toArray();
			}

			if (this.map && this.map.isTexture) data.map = this.map.toJSON(meta).uuid;
			if (this.matcap && this.matcap.isTexture) data.matcap = this.matcap.toJSON(meta).uuid;
			if (this.alphaMap && this.alphaMap.isTexture) data.alphaMap = this.alphaMap.toJSON(meta).uuid;
			if (this.lightMap && this.lightMap.isTexture) data.lightMap = this.lightMap.toJSON(meta).uuid;

			if (this.aoMap && this.aoMap.isTexture) {
				data.aoMap = this.aoMap.toJSON(meta).uuid;
				data.aoMapIntensity = this.aoMapIntensity;
			}

			if (this.bumpMap && this.bumpMap.isTexture) {
				data.bumpMap = this.bumpMap.toJSON(meta).uuid;
				data.bumpScale = this.bumpScale;
			}

			if (this.normalMap && this.normalMap.isTexture) {
				data.normalMap = this.normalMap.toJSON(meta).uuid;
				data.normalMapType = this.normalMapType;
				data.normalScale = this.normalScale.toArray();
			}

			if (this.displacementMap && this.displacementMap.isTexture) {
				data.displacementMap = this.displacementMap.toJSON(meta).uuid;
				data.displacementScale = this.displacementScale;
				data.displacementBias = this.displacementBias;
			}

			if (this.roughnessMap && this.roughnessMap.isTexture) data.roughnessMap = this.roughnessMap.toJSON(meta).uuid;
			if (this.metalnessMap && this.metalnessMap.isTexture) data.metalnessMap = this.metalnessMap.toJSON(meta).uuid;
			if (this.emissiveMap && this.emissiveMap.isTexture) data.emissiveMap = this.emissiveMap.toJSON(meta).uuid;
			if (this.specularMap && this.specularMap.isTexture) data.specularMap = this.specularMap.toJSON(meta).uuid;

			if (this.envMap && this.envMap.isTexture) {
				data.envMap = this.envMap.toJSON(meta).uuid;
				data.reflectivity = this.reflectivity; // Scale behind envMap

				data.refractionRatio = this.refractionRatio;
				if (this.combine !== undefined) data.combine = this.combine;
				if (this.envMapIntensity !== undefined) data.envMapIntensity = this.envMapIntensity;
			}

			if (this.gradientMap && this.gradientMap.isTexture) {
				data.gradientMap = this.gradientMap.toJSON(meta).uuid;
			}

			if (this.size !== undefined) data.size = this.size;
			if (this.sizeAttenuation !== undefined) data.sizeAttenuation = this.sizeAttenuation;
			if (this.blending !== NormalBlending) data.blending = this.blending;
			if (this.flatShading === true) data.flatShading = this.flatShading;
			if (this.side !== FrontSide) data.side = this.side;
			if (this.vertexColors) data.vertexColors = true;
			if (this.opacity < 1) data.opacity = this.opacity;
			if (this.transparent === true) data.transparent = this.transparent;
			data.depthFunc = this.depthFunc;
			data.depthTest = this.depthTest;
			data.depthWrite = this.depthWrite;
			data.stencilWrite = this.stencilWrite;
			data.stencilWriteMask = this.stencilWriteMask;
			data.stencilFunc = this.stencilFunc;
			data.stencilRef = this.stencilRef;
			data.stencilFuncMask = this.stencilFuncMask;
			data.stencilFail = this.stencilFail;
			data.stencilZFail = this.stencilZFail;
			data.stencilZPass = this.stencilZPass; // rotation (SpriteMaterial)

			if (this.rotation && this.rotation !== 0) data.rotation = this.rotation;
			if (this.polygonOffset === true) data.polygonOffset = true;
			if (this.polygonOffsetFactor !== 0) data.polygonOffsetFactor = this.polygonOffsetFactor;
			if (this.polygonOffsetUnits !== 0) data.polygonOffsetUnits = this.polygonOffsetUnits;
			if (this.linewidth && this.linewidth !== 1) data.linewidth = this.linewidth;
			if (this.dashSize !== undefined) data.dashSize = this.dashSize;
			if (this.gapSize !== undefined) data.gapSize = this.gapSize;
			if (this.scale !== undefined) data.scale = this.scale;
			if (this.dithering === true) data.dithering = true;
			if (this.alphaTest > 0) data.alphaTest = this.alphaTest;
			if (this.premultipliedAlpha === true) data.premultipliedAlpha = this.premultipliedAlpha;
			if (this.wireframe === true) data.wireframe = this.wireframe;
			if (this.wireframeLinewidth > 1) data.wireframeLinewidth = this.wireframeLinewidth;
			if (this.wireframeLinecap !== 'round') data.wireframeLinecap = this.wireframeLinecap;
			if (this.wireframeLinejoin !== 'round') data.wireframeLinejoin = this.wireframeLinejoin;
			if (this.morphTargets === true) data.morphTargets = true;
			if (this.morphNormals === true) data.morphNormals = true;
			if (this.skinning === true) data.skinning = true;
			if (this.visible === false) data.visible = false;
			if (this.toneMapped === false) data.toneMapped = false;
			if (JSON.stringify(this.userData) !== '{}') data.userData = this.userData; // TODO: Copied from Object3D.toJSON

			function extractFromCache(cache) {
				var values = [];

				for (var key in cache) {
					var _data = cache[key];
					delete _data.metadata;
					values.push(_data);
				}

				return values;
			}

			if (isRoot) {
				var textures = extractFromCache(meta.textures);
				var images = extractFromCache(meta.images);
				if (textures.length > 0) data.textures = textures;
				if (images.length > 0) data.images = images;
			}

			return data;
		},
		clone: function clone() {
			return new this.constructor().copy(this);
		},
		copy: function copy(source) {
			this.name = source.name;
			this.fog = source.fog;
			this.blending = source.blending;
			this.side = source.side;
			this.flatShading = source.flatShading;
			this.vertexColors = source.vertexColors;
			this.opacity = source.opacity;
			this.transparent = source.transparent;
			this.blendSrc = source.blendSrc;
			this.blendDst = source.blendDst;
			this.blendEquation = source.blendEquation;
			this.blendSrcAlpha = source.blendSrcAlpha;
			this.blendDstAlpha = source.blendDstAlpha;
			this.blendEquationAlpha = source.blendEquationAlpha;
			this.depthFunc = source.depthFunc;
			this.depthTest = source.depthTest;
			this.depthWrite = source.depthWrite;
			this.stencilWriteMask = source.stencilWriteMask;
			this.stencilFunc = source.stencilFunc;
			this.stencilRef = source.stencilRef;
			this.stencilFuncMask = source.stencilFuncMask;
			this.stencilFail = source.stencilFail;
			this.stencilZFail = source.stencilZFail;
			this.stencilZPass = source.stencilZPass;
			this.stencilWrite = source.stencilWrite;
			var srcPlanes = source.clippingPlanes;
			var dstPlanes = null;

			if (srcPlanes !== null) {
				var n = srcPlanes.length;
				dstPlanes = new Array(n);

				for (var i = 0; i !== n; ++i) {
					dstPlanes[i] = srcPlanes[i].clone();
				}
			}

			this.clippingPlanes = dstPlanes;
			this.clipIntersection = source.clipIntersection;
			this.clipShadows = source.clipShadows;
			this.shadowSide = source.shadowSide;
			this.colorWrite = source.colorWrite;
			this.precision = source.precision;
			this.polygonOffset = source.polygonOffset;
			this.polygonOffsetFactor = source.polygonOffsetFactor;
			this.polygonOffsetUnits = source.polygonOffsetUnits;
			this.dithering = source.dithering;
			this.alphaTest = source.alphaTest;
			this.premultipliedAlpha = source.premultipliedAlpha;
			this.visible = source.visible;
			this.toneMapped = source.toneMapped;
			this.userData = JSON.parse(JSON.stringify(source.userData));
			return this;
		},
		dispose: function dispose() {
			this.dispatchEvent({
				type: 'dispose'
			});
		}
	});
	Object.defineProperty(Material.prototype, 'needsUpdate', {
		set: function set(value) {
			if (value === true) this.version++;
		}
	});

	/**
	 * parameters = {
	 *	color: <hex>,
	 *	opacity: <float>,
	 *	map: new THREE.Texture( <Image> ),
	 *
	 *	lightMap: new THREE.Texture( <Image> ),
	 *	lightMapIntensity: <float>
	 *
	 *	aoMap: new THREE.Texture( <Image> ),
	 *	aoMapIntensity: <float>
	 *
	 *	specularMap: new THREE.Texture( <Image> ),
	 *
	 *	alphaMap: new THREE.Texture( <Image> ),
	 *
	 *	envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
	 *	combine: THREE.Multiply,
	 *	reflectivity: <float>,
	 *	refractionRatio: <float>,
	 *
	 *	depthTest: <bool>,
	 *	depthWrite: <bool>,
	 *
	 *	wireframe: <boolean>,
	 *	wireframeLinewidth: <float>,
	 *
	 *	skinning: <bool>,
	 *	morphTargets: <bool>
	 * }
	 */

	function MeshBasicMaterial(parameters) {
		Material.call(this);
		this.type = 'MeshBasicMaterial';
		this.color = new Color(0xffffff); // emissive

		this.map = null;
		this.lightMap = null;
		this.lightMapIntensity = 1.0;
		this.aoMap = null;
		this.aoMapIntensity = 1.0;
		this.specularMap = null;
		this.alphaMap = null;
		this.envMap = null;
		this.combine = MultiplyOperation;
		this.reflectivity = 1;
		this.refractionRatio = 0.98;
		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.wireframeLinecap = 'round';
		this.wireframeLinejoin = 'round';
		this.skinning = false;
		this.morphTargets = false;
		this.setValues(parameters);
	}

	MeshBasicMaterial.prototype = Object.create(Material.prototype);
	MeshBasicMaterial.prototype.constructor = MeshBasicMaterial;
	MeshBasicMaterial.prototype.isMeshBasicMaterial = true;

	MeshBasicMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.color.copy(source.color);
		this.map = source.map;
		this.lightMap = source.lightMap;
		this.lightMapIntensity = source.lightMapIntensity;
		this.aoMap = source.aoMap;
		this.aoMapIntensity = source.aoMapIntensity;
		this.specularMap = source.specularMap;
		this.alphaMap = source.alphaMap;
		this.envMap = source.envMap;
		this.combine = source.combine;
		this.reflectivity = source.reflectivity;
		this.refractionRatio = source.refractionRatio;
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.wireframeLinecap = source.wireframeLinecap;
		this.wireframeLinejoin = source.wireframeLinejoin;
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		return this;
	};

	var _vector$3 = new Vector3();

	var _vector2$1 = new Vector2();

	function BufferAttribute(array, itemSize, normalized) {
		if (Array.isArray(array)) {
			throw new TypeError('THREE.BufferAttribute: array should be a Typed Array.');
		}

		this.name = '';
		this.array = array;
		this.itemSize = itemSize;
		this.count = array !== undefined ? array.length / itemSize : 0;
		this.normalized = normalized === true;
		this.usage = StaticDrawUsage;
		this.updateRange = {
			offset: 0,
			count: -1
		};
		this.version = 0;
	}

	Object.defineProperty(BufferAttribute.prototype, 'needsUpdate', {
		set: function set(value) {
			if (value === true) this.version++;
		}
	});
	Object.assign(BufferAttribute.prototype, {
		isBufferAttribute: true,
		onUploadCallback: function onUploadCallback() {},
		setUsage: function setUsage(value) {
			this.usage = value;
			return this;
		},
		copy: function copy(source) {
			this.name = source.name;
			this.array = new source.array.constructor(source.array);
			this.itemSize = source.itemSize;
			this.count = source.count;
			this.normalized = source.normalized;
			this.usage = source.usage;
			return this;
		},
		copyAt: function copyAt(index1, attribute, index2) {
			index1 *= this.itemSize;
			index2 *= attribute.itemSize;

			for (var i = 0, l = this.itemSize; i < l; i++) {
				this.array[index1 + i] = attribute.array[index2 + i];
			}

			return this;
		},
		copyArray: function copyArray(array) {
			this.array.set(array);
			return this;
		},
		copyColorsArray: function copyColorsArray(colors) {
			var array = this.array;
			var offset = 0;

			for (var i = 0, l = colors.length; i < l; i++) {
				var color = colors[i];

				if (color === undefined) {
					console.warn('THREE.BufferAttribute.copyColorsArray(): color is undefined', i);
					color = new Color();
				}

				array[offset++] = color.r;
				array[offset++] = color.g;
				array[offset++] = color.b;
			}

			return this;
		},
		copyVector2sArray: function copyVector2sArray(vectors) {
			var array = this.array;
			var offset = 0;

			for (var i = 0, l = vectors.length; i < l; i++) {
				var vector = vectors[i];

				if (vector === undefined) {
					console.warn('THREE.BufferAttribute.copyVector2sArray(): vector is undefined', i);
					vector = new Vector2();
				}

				array[offset++] = vector.x;
				array[offset++] = vector.y;
			}

			return this;
		},
		copyVector3sArray: function copyVector3sArray(vectors) {
			var array = this.array;
			var offset = 0;

			for (var i = 0, l = vectors.length; i < l; i++) {
				var vector = vectors[i];

				if (vector === undefined) {
					console.warn('THREE.BufferAttribute.copyVector3sArray(): vector is undefined', i);
					vector = new Vector3();
				}

				array[offset++] = vector.x;
				array[offset++] = vector.y;
				array[offset++] = vector.z;
			}

			return this;
		},
		copyVector4sArray: function copyVector4sArray(vectors) {
			var array = this.array;
			var offset = 0;

			for (var i = 0, l = vectors.length; i < l; i++) {
				var vector = vectors[i];

				if (vector === undefined) {
					console.warn('THREE.BufferAttribute.copyVector4sArray(): vector is undefined', i);
					vector = new Vector4();
				}

				array[offset++] = vector.x;
				array[offset++] = vector.y;
				array[offset++] = vector.z;
				array[offset++] = vector.w;
			}

			return this;
		},
		applyMatrix3: function applyMatrix3(m) {
			if (this.itemSize === 2) {
				for (var i = 0, l = this.count; i < l; i++) {
					_vector2$1.fromBufferAttribute(this, i);

					_vector2$1.applyMatrix3(m);

					this.setXY(i, _vector2$1.x, _vector2$1.y);
				}
			} else if (this.itemSize === 3) {
				for (var _i = 0, _l = this.count; _i < _l; _i++) {
					_vector$3.fromBufferAttribute(this, _i);

					_vector$3.applyMatrix3(m);

					this.setXYZ(_i, _vector$3.x, _vector$3.y, _vector$3.z);
				}
			}

			return this;
		},
		applyMatrix4: function applyMatrix4(m) {
			for (var i = 0, l = this.count; i < l; i++) {
				_vector$3.x = this.getX(i);
				_vector$3.y = this.getY(i);
				_vector$3.z = this.getZ(i);

				_vector$3.applyMatrix4(m);

				this.setXYZ(i, _vector$3.x, _vector$3.y, _vector$3.z);
			}

			return this;
		},
		applyNormalMatrix: function applyNormalMatrix(m) {
			for (var i = 0, l = this.count; i < l; i++) {
				_vector$3.x = this.getX(i);
				_vector$3.y = this.getY(i);
				_vector$3.z = this.getZ(i);

				_vector$3.applyNormalMatrix(m);

				this.setXYZ(i, _vector$3.x, _vector$3.y, _vector$3.z);
			}

			return this;
		},
		transformDirection: function transformDirection(m) {
			for (var i = 0, l = this.count; i < l; i++) {
				_vector$3.x = this.getX(i);
				_vector$3.y = this.getY(i);
				_vector$3.z = this.getZ(i);

				_vector$3.transformDirection(m);

				this.setXYZ(i, _vector$3.x, _vector$3.y, _vector$3.z);
			}

			return this;
		},
		set: function set(value, offset) {
			if (offset === void 0) {
				offset = 0;
			}

			this.array.set(value, offset);
			return this;
		},
		getX: function getX(index) {
			return this.array[index * this.itemSize];
		},
		setX: function setX(index, x) {
			this.array[index * this.itemSize] = x;
			return this;
		},
		getY: function getY(index) {
			return this.array[index * this.itemSize + 1];
		},
		setY: function setY(index, y) {
			this.array[index * this.itemSize + 1] = y;
			return this;
		},
		getZ: function getZ(index) {
			return this.array[index * this.itemSize + 2];
		},
		setZ: function setZ(index, z) {
			this.array[index * this.itemSize + 2] = z;
			return this;
		},
		getW: function getW(index) {
			return this.array[index * this.itemSize + 3];
		},
		setW: function setW(index, w) {
			this.array[index * this.itemSize + 3] = w;
			return this;
		},
		setXY: function setXY(index, x, y) {
			index *= this.itemSize;
			this.array[index + 0] = x;
			this.array[index + 1] = y;
			return this;
		},
		setXYZ: function setXYZ(index, x, y, z) {
			index *= this.itemSize;
			this.array[index + 0] = x;
			this.array[index + 1] = y;
			this.array[index + 2] = z;
			return this;
		},
		setXYZW: function setXYZW(index, x, y, z, w) {
			index *= this.itemSize;
			this.array[index + 0] = x;
			this.array[index + 1] = y;
			this.array[index + 2] = z;
			this.array[index + 3] = w;
			return this;
		},
		onUpload: function onUpload(callback) {
			this.onUploadCallback = callback;
			return this;
		},
		clone: function clone() {
			return new this.constructor(this.array, this.itemSize).copy(this);
		},
		toJSON: function toJSON() {
			return {
				itemSize: this.itemSize,
				type: this.array.constructor.name,
				array: Array.prototype.slice.call(this.array),
				normalized: this.normalized
			};
		}
	}); //

	function Int8BufferAttribute(array, itemSize, normalized) {
		BufferAttribute.call(this, new Int8Array(array), itemSize, normalized);
	}

	Int8BufferAttribute.prototype = Object.create(BufferAttribute.prototype);
	Int8BufferAttribute.prototype.constructor = Int8BufferAttribute;

	function Uint8BufferAttribute(array, itemSize, normalized) {
		BufferAttribute.call(this, new Uint8Array(array), itemSize, normalized);
	}

	Uint8BufferAttribute.prototype = Object.create(BufferAttribute.prototype);
	Uint8BufferAttribute.prototype.constructor = Uint8BufferAttribute;

	function Uint8ClampedBufferAttribute(array, itemSize, normalized) {
		BufferAttribute.call(this, new Uint8ClampedArray(array), itemSize, normalized);
	}

	Uint8ClampedBufferAttribute.prototype = Object.create(BufferAttribute.prototype);
	Uint8ClampedBufferAttribute.prototype.constructor = Uint8ClampedBufferAttribute;

	function Int16BufferAttribute(array, itemSize, normalized) {
		BufferAttribute.call(this, new Int16Array(array), itemSize, normalized);
	}

	Int16BufferAttribute.prototype = Object.create(BufferAttribute.prototype);
	Int16BufferAttribute.prototype.constructor = Int16BufferAttribute;

	function Uint16BufferAttribute(array, itemSize, normalized) {
		BufferAttribute.call(this, new Uint16Array(array), itemSize, normalized);
	}

	Uint16BufferAttribute.prototype = Object.create(BufferAttribute.prototype);
	Uint16BufferAttribute.prototype.constructor = Uint16BufferAttribute;

	function Int32BufferAttribute(array, itemSize, normalized) {
		BufferAttribute.call(this, new Int32Array(array), itemSize, normalized);
	}

	Int32BufferAttribute.prototype = Object.create(BufferAttribute.prototype);
	Int32BufferAttribute.prototype.constructor = Int32BufferAttribute;

	function Uint32BufferAttribute(array, itemSize, normalized) {
		BufferAttribute.call(this, new Uint32Array(array), itemSize, normalized);
	}

	Uint32BufferAttribute.prototype = Object.create(BufferAttribute.prototype);
	Uint32BufferAttribute.prototype.constructor = Uint32BufferAttribute;

	function Float16BufferAttribute(array, itemSize, normalized) {
		BufferAttribute.call(this, new Uint16Array(array), itemSize, normalized);
	}

	Float16BufferAttribute.prototype = Object.create(BufferAttribute.prototype);
	Float16BufferAttribute.prototype.constructor = Float16BufferAttribute;
	Float16BufferAttribute.prototype.isFloat16BufferAttribute = true;

	function Float32BufferAttribute(array, itemSize, normalized) {
		BufferAttribute.call(this, new Float32Array(array), itemSize, normalized);
	}

	Float32BufferAttribute.prototype = Object.create(BufferAttribute.prototype);
	Float32BufferAttribute.prototype.constructor = Float32BufferAttribute;

	function Float64BufferAttribute(array, itemSize, normalized) {
		BufferAttribute.call(this, new Float64Array(array), itemSize, normalized);
	}

	Float64BufferAttribute.prototype = Object.create(BufferAttribute.prototype);
	Float64BufferAttribute.prototype.constructor = Float64BufferAttribute; //

	function arrayMax(array) {
		if (array.length === 0) return -Infinity;
		var max = array[0];

		for (var i = 1, l = array.length; i < l; ++i) {
			if (array[i] > max) max = array[i];
		}

		return max;
	}

	var TYPED_ARRAYS = {
		Int8Array: Int8Array,
		Uint8Array: Uint8Array,
		// Workaround for IE11 pre KB2929437. See #11440
		Uint8ClampedArray: typeof Uint8ClampedArray !== 'undefined' ? Uint8ClampedArray : Uint8Array,
		Int16Array: Int16Array,
		Uint16Array: Uint16Array,
		Int32Array: Int32Array,
		Uint32Array: Uint32Array,
		Float32Array: Float32Array,
		Float64Array: Float64Array
	};

	function getTypedArray(type, buffer) {
		return new TYPED_ARRAYS[type](buffer);
	}

	var _id = 0;

	var _m1$2 = new Matrix4();

	var _obj = new Object3D();

	var _offset = new Vector3();

	var _box$2 = new Box3();

	var _boxMorphTargets = new Box3();

	var _vector$4 = new Vector3();

	function BufferGeometry() {
		Object.defineProperty(this, 'id', {
			value: _id++
		});
		this.uuid = MathUtils.generateUUID();
		this.name = '';
		this.type = 'BufferGeometry';
		this.index = null;
		this.attributes = {};
		this.morphAttributes = {};
		this.morphTargetsRelative = false;
		this.groups = [];
		this.boundingBox = null;
		this.boundingSphere = null;
		this.drawRange = {
			start: 0,
			count: Infinity
		};
		this.userData = {};
	}

	BufferGeometry.prototype = Object.assign(Object.create(EventDispatcher.prototype), {
		constructor: BufferGeometry,
		isBufferGeometry: true,
		getIndex: function getIndex() {
			return this.index;
		},
		setIndex: function setIndex(index) {
			if (Array.isArray(index)) {
				this.index = new (arrayMax(index) > 65535 ? Uint32BufferAttribute : Uint16BufferAttribute)(index, 1);
			} else {
				this.index = index;
			}

			return this;
		},
		getAttribute: function getAttribute(name) {
			return this.attributes[name];
		},
		setAttribute: function setAttribute(name, attribute) {
			this.attributes[name] = attribute;
			return this;
		},
		deleteAttribute: function deleteAttribute(name) {
			delete this.attributes[name];
			return this;
		},
		hasAttribute: function hasAttribute(name) {
			return this.attributes[name] !== undefined;
		},
		addGroup: function addGroup(start, count, materialIndex) {
			if (materialIndex === void 0) {
				materialIndex = 0;
			}

			this.groups.push({
				start: start,
				count: count,
				materialIndex: materialIndex
			});
		},
		clearGroups: function clearGroups() {
			this.groups = [];
		},
		setDrawRange: function setDrawRange(start, count) {
			this.drawRange.start = start;
			this.drawRange.count = count;
		},
		applyMatrix4: function applyMatrix4(matrix) {
			var position = this.attributes.position;

			if (position !== undefined) {
				position.applyMatrix4(matrix);
				position.needsUpdate = true;
			}

			var normal = this.attributes.normal;

			if (normal !== undefined) {
				var normalMatrix = new Matrix3().getNormalMatrix(matrix);
				normal.applyNormalMatrix(normalMatrix);
				normal.needsUpdate = true;
			}

			var tangent = this.attributes.tangent;

			if (tangent !== undefined) {
				tangent.transformDirection(matrix);
				tangent.needsUpdate = true;
			}

			if (this.boundingBox !== null) {
				this.computeBoundingBox();
			}

			if (this.boundingSphere !== null) {
				this.computeBoundingSphere();
			}

			return this;
		},
		rotateX: function rotateX(angle) {
			// rotate geometry around world x-axis
			_m1$2.makeRotationX(angle);

			this.applyMatrix4(_m1$2);
			return this;
		},
		rotateY: function rotateY(angle) {
			// rotate geometry around world y-axis
			_m1$2.makeRotationY(angle);

			this.applyMatrix4(_m1$2);
			return this;
		},
		rotateZ: function rotateZ(angle) {
			// rotate geometry around world z-axis
			_m1$2.makeRotationZ(angle);

			this.applyMatrix4(_m1$2);
			return this;
		},
		translate: function translate(x, y, z) {
			// translate geometry
			_m1$2.makeTranslation(x, y, z);

			this.applyMatrix4(_m1$2);
			return this;
		},
		scale: function scale(x, y, z) {
			// scale geometry
			_m1$2.makeScale(x, y, z);

			this.applyMatrix4(_m1$2);
			return this;
		},
		lookAt: function lookAt(vector) {
			_obj.lookAt(vector);

			_obj.updateMatrix();

			this.applyMatrix4(_obj.matrix);
			return this;
		},
		center: function center() {
			this.computeBoundingBox();
			this.boundingBox.getCenter(_offset).negate();
			this.translate(_offset.x, _offset.y, _offset.z);
			return this;
		},
		setFromPoints: function setFromPoints(points) {
			var position = [];

			for (var i = 0, l = points.length; i < l; i++) {
				var point = points[i];
				position.push(point.x, point.y, point.z || 0);
			}

			this.setAttribute('position', new Float32BufferAttribute(position, 3));
			return this;
		},
		computeBoundingBox: function computeBoundingBox() {
			if (this.boundingBox === null) {
				this.boundingBox = new Box3();
			}

			var position = this.attributes.position;
			var morphAttributesPosition = this.morphAttributes.position;

			if (position && position.isGLBufferAttribute) {
				console.error('THREE.BufferGeometry.computeBoundingBox(): GLBufferAttribute requires a manual bounding box. Alternatively set "mesh.frustumCulled" to "false".', this);
				this.boundingBox.set(new Vector3(-Infinity, -Infinity, -Infinity), new Vector3(+Infinity, +Infinity, +Infinity));
				return;
			}

			if (position !== undefined) {
				this.boundingBox.setFromBufferAttribute(position); // process morph attributes if present

				if (morphAttributesPosition) {
					for (var i = 0, il = morphAttributesPosition.length; i < il; i++) {
						var morphAttribute = morphAttributesPosition[i];

						_box$2.setFromBufferAttribute(morphAttribute);

						if (this.morphTargetsRelative) {
							_vector$4.addVectors(this.boundingBox.min, _box$2.min);

							this.boundingBox.expandByPoint(_vector$4);

							_vector$4.addVectors(this.boundingBox.max, _box$2.max);

							this.boundingBox.expandByPoint(_vector$4);
						} else {
							this.boundingBox.expandByPoint(_box$2.min);
							this.boundingBox.expandByPoint(_box$2.max);
						}
					}
				}
			} else {
				this.boundingBox.makeEmpty();
			}

			if (isNaN(this.boundingBox.min.x) || isNaN(this.boundingBox.min.y) || isNaN(this.boundingBox.min.z)) {
				console.error('THREE.BufferGeometry.computeBoundingBox(): Computed min/max have NaN values. The "position" attribute is likely to have NaN values.', this);
			}
		},
		computeBoundingSphere: function computeBoundingSphere() {
			if (this.boundingSphere === null) {
				this.boundingSphere = new Sphere();
			}

			var position = this.attributes.position;
			var morphAttributesPosition = this.morphAttributes.position;

			if (position && position.isGLBufferAttribute) {
				console.error('THREE.BufferGeometry.computeBoundingSphere(): GLBufferAttribute requires a manual bounding sphere. Alternatively set "mesh.frustumCulled" to "false".', this);
				this.boundingSphere.set(new Vector3(), Infinity);
				return;
			}

			if (position) {
				// first, find the center of the bounding sphere
				var center = this.boundingSphere.center;

				_box$2.setFromBufferAttribute(position); // process morph attributes if present


				if (morphAttributesPosition) {
					for (var i = 0, il = morphAttributesPosition.length; i < il; i++) {
						var morphAttribute = morphAttributesPosition[i];

						_boxMorphTargets.setFromBufferAttribute(morphAttribute);

						if (this.morphTargetsRelative) {
							_vector$4.addVectors(_box$2.min, _boxMorphTargets.min);

							_box$2.expandByPoint(_vector$4);

							_vector$4.addVectors(_box$2.max, _boxMorphTargets.max);

							_box$2.expandByPoint(_vector$4);
						} else {
							_box$2.expandByPoint(_boxMorphTargets.min);

							_box$2.expandByPoint(_boxMorphTargets.max);
						}
					}
				}

				_box$2.getCenter(center); // second, try to find a boundingSphere with a radius smaller than the
				// boundingSphere of the boundingBox: sqrt(3) smaller in the best case


				var maxRadiusSq = 0;

				for (var _i = 0, _il = position.count; _i < _il; _i++) {
					_vector$4.fromBufferAttribute(position, _i);

					maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(_vector$4));
				} // process morph attributes if present


				if (morphAttributesPosition) {
					for (var _i2 = 0, _il2 = morphAttributesPosition.length; _i2 < _il2; _i2++) {
						var _morphAttribute = morphAttributesPosition[_i2];
						var morphTargetsRelative = this.morphTargetsRelative;

						for (var j = 0, jl = _morphAttribute.count; j < jl; j++) {
							_vector$4.fromBufferAttribute(_morphAttribute, j);

							if (morphTargetsRelative) {
								_offset.fromBufferAttribute(position, j);

								_vector$4.add(_offset);
							}

							maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(_vector$4));
						}
					}
				}

				this.boundingSphere.radius = Math.sqrt(maxRadiusSq);

				if (isNaN(this.boundingSphere.radius)) {
					console.error('THREE.BufferGeometry.computeBoundingSphere(): Computed radius is NaN. The "position" attribute is likely to have NaN values.', this);
				}
			}
		},
		computeFaceNormals: function computeFaceNormals() {// backwards compatibility
		},
		computeTangents: function computeTangents() {
			var index = this.index;
			var attributes = this.attributes; // based on http://www.terathon.com/code/tangent.html
			// (per vertex tangents)

			if (index === null || attributes.position === undefined || attributes.normal === undefined || attributes.uv === undefined) {
				console.error('THREE.BufferGeometry: .computeTangents() failed. Missing required attributes (index, position, normal or uv)');
				return;
			}

			var indices = index.array;
			var positions = attributes.position.array;
			var normals = attributes.normal.array;
			var uvs = attributes.uv.array;
			var nVertices = positions.length / 3;

			if (attributes.tangent === undefined) {
				this.setAttribute('tangent', new BufferAttribute(new Float32Array(4 * nVertices), 4));
			}

			var tangents = attributes.tangent.array;
			var tan1 = [],
					tan2 = [];

			for (var i = 0; i < nVertices; i++) {
				tan1[i] = new Vector3();
				tan2[i] = new Vector3();
			}

			var vA = new Vector3(),
					vB = new Vector3(),
					vC = new Vector3(),
					uvA = new Vector2(),
					uvB = new Vector2(),
					uvC = new Vector2(),
					sdir = new Vector3(),
					tdir = new Vector3();

			function handleTriangle(a, b, c) {
				vA.fromArray(positions, a * 3);
				vB.fromArray(positions, b * 3);
				vC.fromArray(positions, c * 3);
				uvA.fromArray(uvs, a * 2);
				uvB.fromArray(uvs, b * 2);
				uvC.fromArray(uvs, c * 2);
				vB.sub(vA);
				vC.sub(vA);
				uvB.sub(uvA);
				uvC.sub(uvA);
				var r = 1.0 / (uvB.x * uvC.y - uvC.x * uvB.y); // silently ignore degenerate uv triangles having coincident or colinear vertices

				if (!isFinite(r)) return;
				sdir.copy(vB).multiplyScalar(uvC.y).addScaledVector(vC, -uvB.y).multiplyScalar(r);
				tdir.copy(vC).multiplyScalar(uvB.x).addScaledVector(vB, -uvC.x).multiplyScalar(r);
				tan1[a].add(sdir);
				tan1[b].add(sdir);
				tan1[c].add(sdir);
				tan2[a].add(tdir);
				tan2[b].add(tdir);
				tan2[c].add(tdir);
			}

			var groups = this.groups;

			if (groups.length === 0) {
				groups = [{
					start: 0,
					count: indices.length
				}];
			}

			for (var _i3 = 0, il = groups.length; _i3 < il; ++_i3) {
				var group = groups[_i3];
				var start = group.start;
				var count = group.count;

				for (var j = start, jl = start + count; j < jl; j += 3) {
					handleTriangle(indices[j + 0], indices[j + 1], indices[j + 2]);
				}
			}

			var tmp = new Vector3(),
					tmp2 = new Vector3();
			var n = new Vector3(),
					n2 = new Vector3();

			function handleVertex(v) {
				n.fromArray(normals, v * 3);
				n2.copy(n);
				var t = tan1[v]; // Gram-Schmidt orthogonalize

				tmp.copy(t);
				tmp.sub(n.multiplyScalar(n.dot(t))).normalize(); // Calculate handedness

				tmp2.crossVectors(n2, t);
				var test = tmp2.dot(tan2[v]);
				var w = test < 0.0 ? -1.0 : 1.0;
				tangents[v * 4] = tmp.x;
				tangents[v * 4 + 1] = tmp.y;
				tangents[v * 4 + 2] = tmp.z;
				tangents[v * 4 + 3] = w;
			}

			for (var _i4 = 0, _il3 = groups.length; _i4 < _il3; ++_i4) {
				var _group = groups[_i4];
				var _start = _group.start;
				var _count = _group.count;

				for (var _j = _start, _jl = _start + _count; _j < _jl; _j += 3) {
					handleVertex(indices[_j + 0]);
					handleVertex(indices[_j + 1]);
					handleVertex(indices[_j + 2]);
				}
			}
		},
		computeVertexNormals: function computeVertexNormals() {
			var index = this.index;
			var positionAttribute = this.getAttribute('position');

			if (positionAttribute !== undefined) {
				var normalAttribute = this.getAttribute('normal');

				if (normalAttribute === undefined) {
					normalAttribute = new BufferAttribute(new Float32Array(positionAttribute.count * 3), 3);
					this.setAttribute('normal', normalAttribute);
				} else {
					// reset existing normals to zero
					for (var i = 0, il = normalAttribute.count; i < il; i++) {
						normalAttribute.setXYZ(i, 0, 0, 0);
					}
				}

				var pA = new Vector3(),
						pB = new Vector3(),
						pC = new Vector3();
				var nA = new Vector3(),
						nB = new Vector3(),
						nC = new Vector3();
				var cb = new Vector3(),
						ab = new Vector3(); // indexed elements

				if (index) {
					for (var _i5 = 0, _il4 = index.count; _i5 < _il4; _i5 += 3) {
						var vA = index.getX(_i5 + 0);
						var vB = index.getX(_i5 + 1);
						var vC = index.getX(_i5 + 2);
						pA.fromBufferAttribute(positionAttribute, vA);
						pB.fromBufferAttribute(positionAttribute, vB);
						pC.fromBufferAttribute(positionAttribute, vC);
						cb.subVectors(pC, pB);
						ab.subVectors(pA, pB);
						cb.cross(ab);
						nA.fromBufferAttribute(normalAttribute, vA);
						nB.fromBufferAttribute(normalAttribute, vB);
						nC.fromBufferAttribute(normalAttribute, vC);
						nA.add(cb);
						nB.add(cb);
						nC.add(cb);
						normalAttribute.setXYZ(vA, nA.x, nA.y, nA.z);
						normalAttribute.setXYZ(vB, nB.x, nB.y, nB.z);
						normalAttribute.setXYZ(vC, nC.x, nC.y, nC.z);
					}
				} else {
					// non-indexed elements (unconnected triangle soup)
					for (var _i6 = 0, _il5 = positionAttribute.count; _i6 < _il5; _i6 += 3) {
						pA.fromBufferAttribute(positionAttribute, _i6 + 0);
						pB.fromBufferAttribute(positionAttribute, _i6 + 1);
						pC.fromBufferAttribute(positionAttribute, _i6 + 2);
						cb.subVectors(pC, pB);
						ab.subVectors(pA, pB);
						cb.cross(ab);
						normalAttribute.setXYZ(_i6 + 0, cb.x, cb.y, cb.z);
						normalAttribute.setXYZ(_i6 + 1, cb.x, cb.y, cb.z);
						normalAttribute.setXYZ(_i6 + 2, cb.x, cb.y, cb.z);
					}
				}

				this.normalizeNormals();
				normalAttribute.needsUpdate = true;
			}
		},
		merge: function merge(geometry, offset) {
			if (!(geometry && geometry.isBufferGeometry)) {
				console.error('THREE.BufferGeometry.merge(): geometry not an instance of THREE.BufferGeometry.', geometry);
				return;
			}

			if (offset === undefined) {
				offset = 0;
				console.warn('THREE.BufferGeometry.merge(): Overwriting original geometry, starting at offset=0. ' + 'Use BufferGeometryUtils.mergeBufferGeometries() for lossless merge.');
			}

			var attributes = this.attributes;

			for (var key in attributes) {
				if (geometry.attributes[key] === undefined) continue;
				var attribute1 = attributes[key];
				var attributeArray1 = attribute1.array;
				var attribute2 = geometry.attributes[key];
				var attributeArray2 = attribute2.array;
				var attributeOffset = attribute2.itemSize * offset;
				var length = Math.min(attributeArray2.length, attributeArray1.length - attributeOffset);

				for (var i = 0, j = attributeOffset; i < length; i++, j++) {
					attributeArray1[j] = attributeArray2[i];
				}
			}

			return this;
		},
		normalizeNormals: function normalizeNormals() {
			var normals = this.attributes.normal;

			for (var i = 0, il = normals.count; i < il; i++) {
				_vector$4.fromBufferAttribute(normals, i);

				_vector$4.normalize();

				normals.setXYZ(i, _vector$4.x, _vector$4.y, _vector$4.z);
			}
		},
		toNonIndexed: function toNonIndexed() {
			function convertBufferAttribute(attribute, indices) {
				var array = attribute.array;
				var itemSize = attribute.itemSize;
				var normalized = attribute.normalized;
				var array2 = new array.constructor(indices.length * itemSize);
				var index = 0,
						index2 = 0;

				for (var i = 0, l = indices.length; i < l; i++) {
					index = indices[i] * itemSize;

					for (var j = 0; j < itemSize; j++) {
						array2[index2++] = array[index++];
					}
				}

				return new BufferAttribute(array2, itemSize, normalized);
			} //


			if (this.index === null) {
				console.warn('THREE.BufferGeometry.toNonIndexed(): BufferGeometry is already non-indexed.');
				return this;
			}

			var geometry2 = new BufferGeometry();
			var indices = this.index.array;
			var attributes = this.attributes; // attributes

			for (var name in attributes) {
				var attribute = attributes[name];
				var newAttribute = convertBufferAttribute(attribute, indices);
				geometry2.setAttribute(name, newAttribute);
			} // morph attributes


			var morphAttributes = this.morphAttributes;

			for (var _name in morphAttributes) {
				var morphArray = [];
				var morphAttribute = morphAttributes[_name]; // morphAttribute: array of Float32BufferAttributes

				for (var i = 0, il = morphAttribute.length; i < il; i++) {
					var _attribute = morphAttribute[i];

					var _newAttribute = convertBufferAttribute(_attribute, indices);

					morphArray.push(_newAttribute);
				}

				geometry2.morphAttributes[_name] = morphArray;
			}

			geometry2.morphTargetsRelative = this.morphTargetsRelative; // groups

			var groups = this.groups;

			for (var _i7 = 0, l = groups.length; _i7 < l; _i7++) {
				var group = groups[_i7];
				geometry2.addGroup(group.start, group.count, group.materialIndex);
			}

			return geometry2;
		},
		toJSON: function toJSON() {
			var data = {
				metadata: {
					version: 4.5,
					type: 'BufferGeometry',
					generator: 'BufferGeometry.toJSON'
				}
			}; // standard BufferGeometry serialization

			data.uuid = this.uuid;
			data.type = this.type;
			if (this.name !== '') data.name = this.name;
			if (Object.keys(this.userData).length > 0) data.userData = this.userData;

			if (this.parameters !== undefined) {
				var parameters = this.parameters;

				for (var key in parameters) {
					if (parameters[key] !== undefined) data[key] = parameters[key];
				}

				return data;
			}

			data.data = {
				attributes: {}
			};
			var index = this.index;

			if (index !== null) {
				data.data.index = {
					type: index.array.constructor.name,
					array: Array.prototype.slice.call(index.array)
				};
			}

			var attributes = this.attributes;

			for (var _key in attributes) {
				var attribute = attributes[_key];
				var attributeData = attribute.toJSON(data.data);
				if (attribute.name !== '') attributeData.name = attribute.name;
				data.data.attributes[_key] = attributeData;
			}

			var morphAttributes = {};
			var hasMorphAttributes = false;

			for (var _key2 in this.morphAttributes) {
				var attributeArray = this.morphAttributes[_key2];
				var array = [];

				for (var i = 0, il = attributeArray.length; i < il; i++) {
					var _attribute2 = attributeArray[i];

					var _attributeData = _attribute2.toJSON(data.data);

					if (_attribute2.name !== '') _attributeData.name = _attribute2.name;
					array.push(_attributeData);
				}

				if (array.length > 0) {
					morphAttributes[_key2] = array;
					hasMorphAttributes = true;
				}
			}

			if (hasMorphAttributes) {
				data.data.morphAttributes = morphAttributes;
				data.data.morphTargetsRelative = this.morphTargetsRelative;
			}

			var groups = this.groups;

			if (groups.length > 0) {
				data.data.groups = JSON.parse(JSON.stringify(groups));
			}

			var boundingSphere = this.boundingSphere;

			if (boundingSphere !== null) {
				data.data.boundingSphere = {
					center: boundingSphere.center.toArray(),
					radius: boundingSphere.radius
				};
			}

			return data;
		},
		clone: function clone() {
			/*
			 // Handle primitives
					 const parameters = this.parameters;
					 if ( parameters !== undefined ) {
					 const values = [];
					 for ( const key in parameters ) {
					 values.push( parameters[ key ] );
					 }
					 const geometry = Object.create( this.constructor.prototype );
			 this.constructor.apply( geometry, values );
			 return geometry;
					 }
					 return new this.constructor().copy( this );
			 */
			return new BufferGeometry().copy(this);
		},
		copy: function copy(source) {
			// reset
			this.index = null;
			this.attributes = {};
			this.morphAttributes = {};
			this.groups = [];
			this.boundingBox = null;
			this.boundingSphere = null; // used for storing cloned, shared data

			var data = {}; // name

			this.name = source.name; // index

			var index = source.index;

			if (index !== null) {
				this.setIndex(index.clone(data));
			} // attributes


			var attributes = source.attributes;

			for (var name in attributes) {
				var attribute = attributes[name];
				this.setAttribute(name, attribute.clone(data));
			} // morph attributes


			var morphAttributes = source.morphAttributes;

			for (var _name2 in morphAttributes) {
				var array = [];
				var morphAttribute = morphAttributes[_name2]; // morphAttribute: array of Float32BufferAttributes

				for (var i = 0, l = morphAttribute.length; i < l; i++) {
					array.push(morphAttribute[i].clone(data));
				}

				this.morphAttributes[_name2] = array;
			}

			this.morphTargetsRelative = source.morphTargetsRelative; // groups

			var groups = source.groups;

			for (var _i8 = 0, _l = groups.length; _i8 < _l; _i8++) {
				var group = groups[_i8];
				this.addGroup(group.start, group.count, group.materialIndex);
			} // bounding box


			var boundingBox = source.boundingBox;

			if (boundingBox !== null) {
				this.boundingBox = boundingBox.clone();
			} // bounding sphere


			var boundingSphere = source.boundingSphere;

			if (boundingSphere !== null) {
				this.boundingSphere = boundingSphere.clone();
			} // draw range


			this.drawRange.start = source.drawRange.start;
			this.drawRange.count = source.drawRange.count; // user data

			this.userData = source.userData;
			return this;
		},
		dispose: function dispose() {
			this.dispatchEvent({
				type: 'dispose'
			});
		}
	});

	var _inverseMatrix = new Matrix4();

	var _ray = new Ray();

	var _sphere = new Sphere();

	var _vA = new Vector3();

	var _vB = new Vector3();

	var _vC = new Vector3();

	var _tempA = new Vector3();

	var _tempB = new Vector3();

	var _tempC = new Vector3();

	var _morphA = new Vector3();

	var _morphB = new Vector3();

	var _morphC = new Vector3();

	var _uvA = new Vector2();

	var _uvB = new Vector2();

	var _uvC = new Vector2();

	var _intersectionPoint = new Vector3();

	var _intersectionPointWorld = new Vector3();

	function Mesh(geometry, material) {
		if (geometry === void 0) {
			geometry = new BufferGeometry();
		}

		if (material === void 0) {
			material = new MeshBasicMaterial();
		}

		Object3D.call(this);
		this.type = 'Mesh';
		this.geometry = geometry;
		this.material = material;
		this.updateMorphTargets();
	}

	Mesh.prototype = Object.assign(Object.create(Object3D.prototype), {
		constructor: Mesh,
		isMesh: true,
		copy: function copy(source) {
			Object3D.prototype.copy.call(this, source);

			if (source.morphTargetInfluences !== undefined) {
				this.morphTargetInfluences = source.morphTargetInfluences.slice();
			}

			if (source.morphTargetDictionary !== undefined) {
				this.morphTargetDictionary = Object.assign({}, source.morphTargetDictionary);
			}

			this.material = source.material;
			this.geometry = source.geometry;
			return this;
		},
		updateMorphTargets: function updateMorphTargets() {
			var geometry = this.geometry;

			if (geometry.isBufferGeometry) {
				var morphAttributes = geometry.morphAttributes;
				var keys = Object.keys(morphAttributes);

				if (keys.length > 0) {
					var morphAttribute = morphAttributes[keys[0]];

					if (morphAttribute !== undefined) {
						this.morphTargetInfluences = [];
						this.morphTargetDictionary = {};

						for (var m = 0, ml = morphAttribute.length; m < ml; m++) {
							var name = morphAttribute[m].name || String(m);
							this.morphTargetInfluences.push(0);
							this.morphTargetDictionary[name] = m;
						}
					}
				}
			} else {
				var morphTargets = geometry.morphTargets;

				if (morphTargets !== undefined && morphTargets.length > 0) {
					console.error('THREE.Mesh.updateMorphTargets() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.');
				}
			}
		},
		raycast: function raycast(raycaster, intersects) {
			var geometry = this.geometry;
			var material = this.material;
			var matrixWorld = this.matrixWorld;
			if (material === undefined) return; // Checking boundingSphere distance to ray

			if (geometry.boundingSphere === null) geometry.computeBoundingSphere();

			_sphere.copy(geometry.boundingSphere);

			_sphere.applyMatrix4(matrixWorld);

			if (raycaster.ray.intersectsSphere(_sphere) === false) return; //

			_inverseMatrix.copy(matrixWorld).invert();

			_ray.copy(raycaster.ray).applyMatrix4(_inverseMatrix); // Check boundingBox before continuing


			if (geometry.boundingBox !== null) {
				if (_ray.intersectsBox(geometry.boundingBox) === false) return;
			}

			var intersection;

			if (geometry.isBufferGeometry) {
				var index = geometry.index;
				var position = geometry.attributes.position;
				var morphPosition = geometry.morphAttributes.position;
				var morphTargetsRelative = geometry.morphTargetsRelative;
				var uv = geometry.attributes.uv;
				var uv2 = geometry.attributes.uv2;
				var groups = geometry.groups;
				var drawRange = geometry.drawRange;

				if (index !== null) {
					// indexed buffer geometry
					if (Array.isArray(material)) {
						for (var i = 0, il = groups.length; i < il; i++) {
							var group = groups[i];
							var groupMaterial = material[group.materialIndex];
							var start = Math.max(group.start, drawRange.start);
							var end = Math.min(group.start + group.count, drawRange.start + drawRange.count);

							for (var j = start, jl = end; j < jl; j += 3) {
								var a = index.getX(j);
								var b = index.getX(j + 1);
								var c = index.getX(j + 2);
								intersection = checkBufferGeometryIntersection(this, groupMaterial, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c);

								if (intersection) {
									intersection.faceIndex = Math.floor(j / 3); // triangle number in indexed buffer semantics

									intersection.face.materialIndex = group.materialIndex;
									intersects.push(intersection);
								}
							}
						}
					} else {
						var _start = Math.max(0, drawRange.start);

						var _end = Math.min(index.count, drawRange.start + drawRange.count);

						for (var _i = _start, _il = _end; _i < _il; _i += 3) {
							var _a = index.getX(_i);

							var _b = index.getX(_i + 1);

							var _c = index.getX(_i + 2);

							intersection = checkBufferGeometryIntersection(this, material, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, _a, _b, _c);

							if (intersection) {
								intersection.faceIndex = Math.floor(_i / 3); // triangle number in indexed buffer semantics

								intersects.push(intersection);
							}
						}
					}
				} else if (position !== undefined) {
					// non-indexed buffer geometry
					if (Array.isArray(material)) {
						for (var _i2 = 0, _il2 = groups.length; _i2 < _il2; _i2++) {
							var _group = groups[_i2];
							var _groupMaterial = material[_group.materialIndex];

							var _start2 = Math.max(_group.start, drawRange.start);

							var _end2 = Math.min(_group.start + _group.count, drawRange.start + drawRange.count);

							for (var _j = _start2, _jl = _end2; _j < _jl; _j += 3) {
								var _a2 = _j;

								var _b2 = _j + 1;

								var _c2 = _j + 2;

								intersection = checkBufferGeometryIntersection(this, _groupMaterial, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, _a2, _b2, _c2);

								if (intersection) {
									intersection.faceIndex = Math.floor(_j / 3); // triangle number in non-indexed buffer semantics

									intersection.face.materialIndex = _group.materialIndex;
									intersects.push(intersection);
								}
							}
						}
					} else {
						var _start3 = Math.max(0, drawRange.start);

						var _end3 = Math.min(position.count, drawRange.start + drawRange.count);

						for (var _i3 = _start3, _il3 = _end3; _i3 < _il3; _i3 += 3) {
							var _a3 = _i3;

							var _b3 = _i3 + 1;

							var _c3 = _i3 + 2;

							intersection = checkBufferGeometryIntersection(this, material, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, _a3, _b3, _c3);

							if (intersection) {
								intersection.faceIndex = Math.floor(_i3 / 3); // triangle number in non-indexed buffer semantics

								intersects.push(intersection);
							}
						}
					}
				}
			} else if (geometry.isGeometry) {
				console.error('THREE.Mesh.raycast() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.');
			}
		}
	});

	function checkIntersection(object, material, raycaster, ray, pA, pB, pC, point) {
		var intersect;

		if (material.side === BackSide) {
			intersect = ray.intersectTriangle(pC, pB, pA, true, point);
		} else {
			intersect = ray.intersectTriangle(pA, pB, pC, material.side !== DoubleSide, point);
		}

		if (intersect === null) return null;

		_intersectionPointWorld.copy(point);

		_intersectionPointWorld.applyMatrix4(object.matrixWorld);

		var distance = raycaster.ray.origin.distanceTo(_intersectionPointWorld);
		if (distance < raycaster.near || distance > raycaster.far) return null;
		return {
			distance: distance,
			point: _intersectionPointWorld.clone(),
			object: object
		};
	}

	function checkBufferGeometryIntersection(object, material, raycaster, ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c) {
		_vA.fromBufferAttribute(position, a);

		_vB.fromBufferAttribute(position, b);

		_vC.fromBufferAttribute(position, c);

		var morphInfluences = object.morphTargetInfluences;

		if (material.morphTargets && morphPosition && morphInfluences) {
			_morphA.set(0, 0, 0);

			_morphB.set(0, 0, 0);

			_morphC.set(0, 0, 0);

			for (var i = 0, il = morphPosition.length; i < il; i++) {
				var influence = morphInfluences[i];
				var morphAttribute = morphPosition[i];
				if (influence === 0) continue;

				_tempA.fromBufferAttribute(morphAttribute, a);

				_tempB.fromBufferAttribute(morphAttribute, b);

				_tempC.fromBufferAttribute(morphAttribute, c);

				if (morphTargetsRelative) {
					_morphA.addScaledVector(_tempA, influence);

					_morphB.addScaledVector(_tempB, influence);

					_morphC.addScaledVector(_tempC, influence);
				} else {
					_morphA.addScaledVector(_tempA.sub(_vA), influence);

					_morphB.addScaledVector(_tempB.sub(_vB), influence);

					_morphC.addScaledVector(_tempC.sub(_vC), influence);
				}
			}

			_vA.add(_morphA);

			_vB.add(_morphB);

			_vC.add(_morphC);
		}

		if (object.isSkinnedMesh) {
			object.boneTransform(a, _vA);
			object.boneTransform(b, _vB);
			object.boneTransform(c, _vC);
		}

		var intersection = checkIntersection(object, material, raycaster, ray, _vA, _vB, _vC, _intersectionPoint);

		if (intersection) {
			if (uv) {
				_uvA.fromBufferAttribute(uv, a);

				_uvB.fromBufferAttribute(uv, b);

				_uvC.fromBufferAttribute(uv, c);

				intersection.uv = Triangle.getUV(_intersectionPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, new Vector2());
			}

			if (uv2) {
				_uvA.fromBufferAttribute(uv2, a);

				_uvB.fromBufferAttribute(uv2, b);

				_uvC.fromBufferAttribute(uv2, c);

				intersection.uv2 = Triangle.getUV(_intersectionPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, new Vector2());
			}

			var face = new Face3(a, b, c);
			Triangle.getNormal(_vA, _vB, _vC, face.normal);
			intersection.face = face;
		}

		return intersection;
	}

	var BoxGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(BoxGeometry, _BufferGeometry);

		function BoxGeometry(width, height, depth, widthSegments, heightSegments, depthSegments) {
			var _this;

			if (width === void 0) {
				width = 1;
			}

			if (height === void 0) {
				height = 1;
			}

			if (depth === void 0) {
				depth = 1;
			}

			if (widthSegments === void 0) {
				widthSegments = 1;
			}

			if (heightSegments === void 0) {
				heightSegments = 1;
			}

			if (depthSegments === void 0) {
				depthSegments = 1;
			}

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'BoxGeometry';
			_this.parameters = {
				width: width,
				height: height,
				depth: depth,
				widthSegments: widthSegments,
				heightSegments: heightSegments,
				depthSegments: depthSegments
			};

			var scope = _assertThisInitialized(_this); // segments


			widthSegments = Math.floor(widthSegments);
			heightSegments = Math.floor(heightSegments);
			depthSegments = Math.floor(depthSegments); // buffers

			var indices = [];
			var vertices = [];
			var normals = [];
			var uvs = []; // helper variables

			var numberOfVertices = 0;
			var groupStart = 0; // build each side of the box geometry

			buildPlane('z', 'y', 'x', -1, -1, depth, height, width, depthSegments, heightSegments, 0); // px

			buildPlane('z', 'y', 'x', 1, -1, depth, height, -width, depthSegments, heightSegments, 1); // nx

			buildPlane('x', 'z', 'y', 1, 1, width, depth, height, widthSegments, depthSegments, 2); // py

			buildPlane('x', 'z', 'y', 1, -1, width, depth, -height, widthSegments, depthSegments, 3); // ny

			buildPlane('x', 'y', 'z', 1, -1, width, height, depth, widthSegments, heightSegments, 4); // pz

			buildPlane('x', 'y', 'z', -1, -1, width, height, -depth, widthSegments, heightSegments, 5); // nz
			// build geometry

			_this.setIndex(indices);

			_this.setAttribute('position', new Float32BufferAttribute(vertices, 3));

			_this.setAttribute('normal', new Float32BufferAttribute(normals, 3));

			_this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));

			function buildPlane(u, v, w, udir, vdir, width, height, depth, gridX, gridY, materialIndex) {
				var segmentWidth = width / gridX;
				var segmentHeight = height / gridY;
				var widthHalf = width / 2;
				var heightHalf = height / 2;
				var depthHalf = depth / 2;
				var gridX1 = gridX + 1;
				var gridY1 = gridY + 1;
				var vertexCounter = 0;
				var groupCount = 0;
				var vector = new Vector3(); // generate vertices, normals and uvs

				for (var iy = 0; iy < gridY1; iy++) {
					var y = iy * segmentHeight - heightHalf;

					for (var ix = 0; ix < gridX1; ix++) {
						var x = ix * segmentWidth - widthHalf; // set values to correct vector component

						vector[u] = x * udir;
						vector[v] = y * vdir;
						vector[w] = depthHalf; // now apply vector to vertex buffer

						vertices.push(vector.x, vector.y, vector.z); // set values to correct vector component

						vector[u] = 0;
						vector[v] = 0;
						vector[w] = depth > 0 ? 1 : -1; // now apply vector to normal buffer

						normals.push(vector.x, vector.y, vector.z); // uvs

						uvs.push(ix / gridX);
						uvs.push(1 - iy / gridY); // counters

						vertexCounter += 1;
					}
				} // indices
				// 1. you need three indices to draw a single face
				// 2. a single segment consists of two faces
				// 3. so we need to generate six (2*3) indices per segment


				for (var _iy = 0; _iy < gridY; _iy++) {
					for (var _ix = 0; _ix < gridX; _ix++) {
						var a = numberOfVertices + _ix + gridX1 * _iy;
						var b = numberOfVertices + _ix + gridX1 * (_iy + 1);
						var c = numberOfVertices + (_ix + 1) + gridX1 * (_iy + 1);
						var d = numberOfVertices + (_ix + 1) + gridX1 * _iy; // faces

						indices.push(a, b, d);
						indices.push(b, c, d); // increase counter

						groupCount += 6;
					}
				} // add a group to the geometry. this will ensure multi material support


				scope.addGroup(groupStart, groupCount, materialIndex); // calculate new start value for groups

				groupStart += groupCount; // update total number of vertices

				numberOfVertices += vertexCounter;
			}

			return _this;
		}

		return BoxGeometry;
	}(BufferGeometry);

	/**
	 * Uniform Utilities
	 */
	function cloneUniforms(src) {
		var dst = {};

		for (var u in src) {
			dst[u] = {};

			for (var p in src[u]) {
				var property = src[u][p];

				if (property && (property.isColor || property.isMatrix3 || property.isMatrix4 || property.isVector2 || property.isVector3 || property.isVector4 || property.isTexture)) {
					dst[u][p] = property.clone();
				} else if (Array.isArray(property)) {
					dst[u][p] = property.slice();
				} else {
					dst[u][p] = property;
				}
			}
		}

		return dst;
	}
	function mergeUniforms(uniforms) {
		var merged = {};

		for (var u = 0; u < uniforms.length; u++) {
			var tmp = cloneUniforms(uniforms[u]);

			for (var p in tmp) {
				merged[p] = tmp[p];
			}
		}

		return merged;
	} // Legacy

	var UniformsUtils = {
		clone: cloneUniforms,
		merge: mergeUniforms
	};

	var default_vertex = "void main() {\n\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n}";

	var default_fragment = "void main() {\n\tgl_FragColor = vec4( 1.0, 0.0, 0.0, 1.0 );\n}";

	/**
	 * parameters = {
	 *	defines: { "label" : "value" },
	 *	uniforms: { "parameter1": { value: 1.0 }, "parameter2": { value2: 2 } },
	 *
	 *	fragmentShader: <string>,
	 *	vertexShader: <string>,
	 *
	 *	wireframe: <boolean>,
	 *	wireframeLinewidth: <float>,
	 *
	 *	lights: <bool>,
	 *
	 *	skinning: <bool>,
	 *	morphTargets: <bool>,
	 *	morphNormals: <bool>
	 * }
	 */

	function ShaderMaterial(parameters) {
		Material.call(this);
		this.type = 'ShaderMaterial';
		this.defines = {};
		this.uniforms = {};
		this.vertexShader = default_vertex;
		this.fragmentShader = default_fragment;
		this.linewidth = 1;
		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.fog = false; // set to use scene fog

		this.lights = false; // set to use scene lights

		this.clipping = false; // set to use user-defined clipping planes

		this.skinning = false; // set to use skinning attribute streams

		this.morphTargets = false; // set to use morph targets

		this.morphNormals = false; // set to use morph normals

		this.extensions = {
			derivatives: false,
			// set to use derivatives
			fragDepth: false,
			// set to use fragment depth values
			drawBuffers: false,
			// set to use draw buffers
			shaderTextureLOD: false // set to use shader texture LOD

		}; // When rendered geometry doesn't include these attributes but the material does,
		// use these default values in WebGL. This avoids errors when buffer data is missing.

		this.defaultAttributeValues = {
			'color': [1, 1, 1],
			'uv': [0, 0],
			'uv2': [0, 0]
		};
		this.index0AttributeName = undefined;
		this.uniformsNeedUpdate = false;
		this.glslVersion = null;

		if (parameters !== undefined) {
			if (parameters.attributes !== undefined) {
				console.error('THREE.ShaderMaterial: attributes should now be defined in THREE.BufferGeometry instead.');
			}

			this.setValues(parameters);
		}
	}

	ShaderMaterial.prototype = Object.create(Material.prototype);
	ShaderMaterial.prototype.constructor = ShaderMaterial;
	ShaderMaterial.prototype.isShaderMaterial = true;

	ShaderMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.fragmentShader = source.fragmentShader;
		this.vertexShader = source.vertexShader;
		this.uniforms = cloneUniforms(source.uniforms);
		this.defines = Object.assign({}, source.defines);
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.lights = source.lights;
		this.clipping = source.clipping;
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;
		this.extensions = Object.assign({}, source.extensions);
		this.glslVersion = source.glslVersion;
		return this;
	};

	ShaderMaterial.prototype.toJSON = function (meta) {
		var data = Material.prototype.toJSON.call(this, meta);
		data.glslVersion = this.glslVersion;
		data.uniforms = {};

		for (var name in this.uniforms) {
			var uniform = this.uniforms[name];
			var value = uniform.value;

			if (value && value.isTexture) {
				data.uniforms[name] = {
					type: 't',
					value: value.toJSON(meta).uuid
				};
			} else if (value && value.isColor) {
				data.uniforms[name] = {
					type: 'c',
					value: value.getHex()
				};
			} else if (value && value.isVector2) {
				data.uniforms[name] = {
					type: 'v2',
					value: value.toArray()
				};
			} else if (value && value.isVector3) {
				data.uniforms[name] = {
					type: 'v3',
					value: value.toArray()
				};
			} else if (value && value.isVector4) {
				data.uniforms[name] = {
					type: 'v4',
					value: value.toArray()
				};
			} else if (value && value.isMatrix3) {
				data.uniforms[name] = {
					type: 'm3',
					value: value.toArray()
				};
			} else if (value && value.isMatrix4) {
				data.uniforms[name] = {
					type: 'm4',
					value: value.toArray()
				};
			} else {
				data.uniforms[name] = {
					value: value
				}; // note: the array variants v2v, v3v, v4v, m4v and tv are not supported so far
			}
		}

		if (Object.keys(this.defines).length > 0) data.defines = this.defines;
		data.vertexShader = this.vertexShader;
		data.fragmentShader = this.fragmentShader;
		var extensions = {};

		for (var key in this.extensions) {
			if (this.extensions[key] === true) extensions[key] = true;
		}

		if (Object.keys(extensions).length > 0) data.extensions = extensions;
		return data;
	};

	function Camera() {
		Object3D.call(this);
		this.type = 'Camera';
		this.matrixWorldInverse = new Matrix4();
		this.projectionMatrix = new Matrix4();
		this.projectionMatrixInverse = new Matrix4();
	}

	Camera.prototype = Object.assign(Object.create(Object3D.prototype), {
		constructor: Camera,
		isCamera: true,
		copy: function copy(source, recursive) {
			Object3D.prototype.copy.call(this, source, recursive);
			this.matrixWorldInverse.copy(source.matrixWorldInverse);
			this.projectionMatrix.copy(source.projectionMatrix);
			this.projectionMatrixInverse.copy(source.projectionMatrixInverse);
			return this;
		},
		getWorldDirection: function getWorldDirection(target) {
			if (target === undefined) {
				console.warn('THREE.Camera: .getWorldDirection() target is now required');
				target = new Vector3();
			}

			this.updateWorldMatrix(true, false);
			var e = this.matrixWorld.elements;
			return target.set(-e[8], -e[9], -e[10]).normalize();
		},
		updateMatrixWorld: function updateMatrixWorld(force) {
			Object3D.prototype.updateMatrixWorld.call(this, force);
			this.matrixWorldInverse.copy(this.matrixWorld).invert();
		},
		updateWorldMatrix: function updateWorldMatrix(updateParents, updateChildren) {
			Object3D.prototype.updateWorldMatrix.call(this, updateParents, updateChildren);
			this.matrixWorldInverse.copy(this.matrixWorld).invert();
		},
		clone: function clone() {
			return new this.constructor().copy(this);
		}
	});

	function PerspectiveCamera(fov, aspect, near, far) {
		if (fov === void 0) {
			fov = 50;
		}

		if (aspect === void 0) {
			aspect = 1;
		}

		if (near === void 0) {
			near = 0.1;
		}

		if (far === void 0) {
			far = 2000;
		}

		Camera.call(this);
		this.type = 'PerspectiveCamera';
		this.fov = fov;
		this.zoom = 1;
		this.near = near;
		this.far = far;
		this.focus = 10;
		this.aspect = aspect;
		this.view = null;
		this.filmGauge = 35; // width of the film (default in millimeters)

		this.filmOffset = 0; // horizontal film offset (same unit as gauge)

		this.updateProjectionMatrix();
	}

	PerspectiveCamera.prototype = Object.assign(Object.create(Camera.prototype), {
		constructor: PerspectiveCamera,
		isPerspectiveCamera: true,
		copy: function copy(source, recursive) {
			Camera.prototype.copy.call(this, source, recursive);
			this.fov = source.fov;
			this.zoom = source.zoom;
			this.near = source.near;
			this.far = source.far;
			this.focus = source.focus;
			this.aspect = source.aspect;
			this.view = source.view === null ? null : Object.assign({}, source.view);
			this.filmGauge = source.filmGauge;
			this.filmOffset = source.filmOffset;
			return this;
		},

		/**
		 * Sets the FOV by focal length in respect to the current .filmGauge.
		 *
		 * The default film gauge is 35, so that the focal length can be specified for
		 * a 35mm (full frame) camera.
		 *
		 * Values for focal length and film gauge must have the same unit.
		 */
		setFocalLength: function setFocalLength(focalLength) {
			/** see {@link http://www.bobatkins.com/photography/technical/field_of_view.html} */
			var vExtentSlope = 0.5 * this.getFilmHeight() / focalLength;
			this.fov = MathUtils.RAD2DEG * 2 * Math.atan(vExtentSlope);
			this.updateProjectionMatrix();
		},

		/**
		 * Calculates the focal length from the current .fov and .filmGauge.
		 */
		getFocalLength: function getFocalLength() {
			var vExtentSlope = Math.tan(MathUtils.DEG2RAD * 0.5 * this.fov);
			return 0.5 * this.getFilmHeight() / vExtentSlope;
		},
		getEffectiveFOV: function getEffectiveFOV() {
			return MathUtils.RAD2DEG * 2 * Math.atan(Math.tan(MathUtils.DEG2RAD * 0.5 * this.fov) / this.zoom);
		},
		getFilmWidth: function getFilmWidth() {
			// film not completely covered in portrait format (aspect < 1)
			return this.filmGauge * Math.min(this.aspect, 1);
		},
		getFilmHeight: function getFilmHeight() {
			// film not completely covered in landscape format (aspect > 1)
			return this.filmGauge / Math.max(this.aspect, 1);
		},

		/**
		 * Sets an offset in a larger frustum. This is useful for multi-window or
		 * multi-monitor/multi-machine setups.
		 *
		 * For example, if you have 3x2 monitors and each monitor is 1920x1080 and
		 * the monitors are in grid like this
		 *
		 *	 +---+---+---+
		 *	 | A | B | C |
		 *	 +---+---+---+
		 *	 | D | E | F |
		 *	 +---+---+---+
		 *
		 * then for each monitor you would call it like this
		 *
		 *	 const w = 1920;
		 *	 const h = 1080;
		 *	 const fullWidth = w * 3;
		 *	 const fullHeight = h * 2;
		 *
		 *	 --A--
		 *	 camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 0, w, h );
		 *	 --B--
		 *	 camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 0, w, h );
		 *	 --C--
		 *	 camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 0, w, h );
		 *	 --D--
		 *	 camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 1, w, h );
		 *	 --E--
		 *	 camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 1, w, h );
		 *	 --F--
		 *	 camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 1, w, h );
		 *
		 *	 Note there is no reason monitors have to be the same size or in a grid.
		 */
		setViewOffset: function setViewOffset(fullWidth, fullHeight, x, y, width, height) {
			this.aspect = fullWidth / fullHeight;

			if (this.view === null) {
				this.view = {
					enabled: true,
					fullWidth: 1,
					fullHeight: 1,
					offsetX: 0,
					offsetY: 0,
					width: 1,
					height: 1
				};
			}

			this.view.enabled = true;
			this.view.fullWidth = fullWidth;
			this.view.fullHeight = fullHeight;
			this.view.offsetX = x;
			this.view.offsetY = y;
			this.view.width = width;
			this.view.height = height;
			this.updateProjectionMatrix();
		},
		clearViewOffset: function clearViewOffset() {
			if (this.view !== null) {
				this.view.enabled = false;
			}

			this.updateProjectionMatrix();
		},
		updateProjectionMatrix: function updateProjectionMatrix() {
			var near = this.near;
			var top = near * Math.tan(MathUtils.DEG2RAD * 0.5 * this.fov) / this.zoom;
			var height = 2 * top;
			var width = this.aspect * height;
			var left = -0.5 * width;
			var view = this.view;

			if (this.view !== null && this.view.enabled) {
				var fullWidth = view.fullWidth,
						fullHeight = view.fullHeight;
				left += view.offsetX * width / fullWidth;
				top -= view.offsetY * height / fullHeight;
				width *= view.width / fullWidth;
				height *= view.height / fullHeight;
			}

			var skew = this.filmOffset;
			if (skew !== 0) left += near * skew / this.getFilmWidth();
			this.projectionMatrix.makePerspective(left, left + width, top, top - height, near, this.far);
			this.projectionMatrixInverse.copy(this.projectionMatrix).invert();
		},
		toJSON: function toJSON(meta) {
			var data = Object3D.prototype.toJSON.call(this, meta);
			data.object.fov = this.fov;
			data.object.zoom = this.zoom;
			data.object.near = this.near;
			data.object.far = this.far;
			data.object.focus = this.focus;
			data.object.aspect = this.aspect;
			if (this.view !== null) data.object.view = Object.assign({}, this.view);
			data.object.filmGauge = this.filmGauge;
			data.object.filmOffset = this.filmOffset;
			return data;
		}
	});

	var fov = 90,
			aspect = 1;

	function CubeCamera(near, far, renderTarget) {
		Object3D.call(this);
		this.type = 'CubeCamera';

		if (renderTarget.isWebGLCubeRenderTarget !== true) {
			console.error('THREE.CubeCamera: The constructor now expects an instance of WebGLCubeRenderTarget as third parameter.');
			return;
		}

		this.renderTarget = renderTarget;
		var cameraPX = new PerspectiveCamera(fov, aspect, near, far);
		cameraPX.layers = this.layers;
		cameraPX.up.set(0, -1, 0);
		cameraPX.lookAt(new Vector3(1, 0, 0));
		this.add(cameraPX);
		var cameraNX = new PerspectiveCamera(fov, aspect, near, far);
		cameraNX.layers = this.layers;
		cameraNX.up.set(0, -1, 0);
		cameraNX.lookAt(new Vector3(-1, 0, 0));
		this.add(cameraNX);
		var cameraPY = new PerspectiveCamera(fov, aspect, near, far);
		cameraPY.layers = this.layers;
		cameraPY.up.set(0, 0, 1);
		cameraPY.lookAt(new Vector3(0, 1, 0));
		this.add(cameraPY);
		var cameraNY = new PerspectiveCamera(fov, aspect, near, far);
		cameraNY.layers = this.layers;
		cameraNY.up.set(0, 0, -1);
		cameraNY.lookAt(new Vector3(0, -1, 0));
		this.add(cameraNY);
		var cameraPZ = new PerspectiveCamera(fov, aspect, near, far);
		cameraPZ.layers = this.layers;
		cameraPZ.up.set(0, -1, 0);
		cameraPZ.lookAt(new Vector3(0, 0, 1));
		this.add(cameraPZ);
		var cameraNZ = new PerspectiveCamera(fov, aspect, near, far);
		cameraNZ.layers = this.layers;
		cameraNZ.up.set(0, -1, 0);
		cameraNZ.lookAt(new Vector3(0, 0, -1));
		this.add(cameraNZ);

		this.update = function (renderer, scene) {
			if (this.parent === null) this.updateMatrixWorld();
			var currentXrEnabled = renderer.xr.enabled;
			var currentRenderTarget = renderer.getRenderTarget();
			renderer.xr.enabled = false;
			var generateMipmaps = renderTarget.texture.generateMipmaps;
			renderTarget.texture.generateMipmaps = false;
			renderer.setRenderTarget(renderTarget, 0);
			renderer.render(scene, cameraPX);
			renderer.setRenderTarget(renderTarget, 1);
			renderer.render(scene, cameraNX);
			renderer.setRenderTarget(renderTarget, 2);
			renderer.render(scene, cameraPY);
			renderer.setRenderTarget(renderTarget, 3);
			renderer.render(scene, cameraNY);
			renderer.setRenderTarget(renderTarget, 4);
			renderer.render(scene, cameraPZ);
			renderTarget.texture.generateMipmaps = generateMipmaps;
			renderer.setRenderTarget(renderTarget, 5);
			renderer.render(scene, cameraNZ);
			renderer.setRenderTarget(currentRenderTarget);
			renderer.xr.enabled = currentXrEnabled;
		};
	}

	CubeCamera.prototype = Object.create(Object3D.prototype);
	CubeCamera.prototype.constructor = CubeCamera;

	function CubeTexture(images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding) {
		images = images !== undefined ? images : [];
		mapping = mapping !== undefined ? mapping : CubeReflectionMapping;
		format = format !== undefined ? format : RGBFormat;
		Texture.call(this, images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding);
		this.flipY = false; // Why CubeTexture._needsFlipEnvMap is necessary:
		//
		// By convention -- likely based on the RenderMan spec from the 1990's -- cube maps are specified by WebGL (and three.js)
		// in a coordinate system in which positive-x is to the right when looking up the positive-z axis -- in other words,
		// in a left-handed coordinate system. By continuing this convention, preexisting cube maps continued to render correctly.
		// three.js uses a right-handed coordinate system. So environment maps used in three.js appear to have px and nx swapped
		// and the flag _needsFlipEnvMap controls this conversion. The flip is not required (and thus _needsFlipEnvMap is set to false)
		// when using WebGLCubeRenderTarget.texture as a cube texture.

		this._needsFlipEnvMap = true;
	}

	CubeTexture.prototype = Object.create(Texture.prototype);
	CubeTexture.prototype.constructor = CubeTexture;
	CubeTexture.prototype.isCubeTexture = true;
	Object.defineProperty(CubeTexture.prototype, 'images', {
		get: function get() {
			return this.image;
		},
		set: function set(value) {
			this.image = value;
		}
	});

	var WebGLCubeRenderTarget = /*#__PURE__*/function (_WebGLRenderTarget) {
		_inheritsLoose(WebGLCubeRenderTarget, _WebGLRenderTarget);

		function WebGLCubeRenderTarget(size, options, dummy) {
			var _this;

			if (Number.isInteger(options)) {
				console.warn('THREE.WebGLCubeRenderTarget: constructor signature is now WebGLCubeRenderTarget( size, options )');
				options = dummy;
			}

			_this = _WebGLRenderTarget.call(this, size, size, options) || this;
			Object.defineProperty(_assertThisInitialized(_this), 'isWebGLCubeRenderTarget', {
				value: true
			});
			options = options || {};
			_this.texture = new CubeTexture(undefined, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding);
			_this.texture._needsFlipEnvMap = false;
			return _this;
		}

		var _proto = WebGLCubeRenderTarget.prototype;

		_proto.fromEquirectangularTexture = function fromEquirectangularTexture(renderer, texture) {
			this.texture.type = texture.type;
			this.texture.format = RGBAFormat; // see #18859

			this.texture.encoding = texture.encoding;
			this.texture.generateMipmaps = texture.generateMipmaps;
			this.texture.minFilter = texture.minFilter;
			this.texture.magFilter = texture.magFilter;
			var shader = {
				uniforms: {
					tEquirect: {
						value: null
					}
				},
				vertexShader:
				/* glsl */
				"\n\n\t\t\t\tvarying vec3 vWorldDirection;\n\n\t\t\t\tvec3 transformDirection( in vec3 dir, in mat4 matrix ) {\n\n\t\t\t\t\treturn normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\n\n\t\t\t\t}\n\n\t\t\t\tvoid main() {\n\n\t\t\t\t\tvWorldDirection = transformDirection( position, modelMatrix );\n\n\t\t\t\t\t#include <begin_vertex>\n\t\t\t\t\t#include <project_vertex>\n\n\t\t\t\t}\n\t\t\t",
				fragmentShader:
				/* glsl */
				"\n\n\t\t\t\tuniform sampler2D tEquirect;\n\n\t\t\t\tvarying vec3 vWorldDirection;\n\n\t\t\t\t#include <common>\n\n\t\t\t\tvoid main() {\n\n\t\t\t\t\tvec3 direction = normalize( vWorldDirection );\n\n\t\t\t\t\tvec2 sampleUV = equirectUv( direction );\n\n\t\t\t\t\tgl_FragColor = texture2D( tEquirect, sampleUV );\n\n\t\t\t\t}\n\t\t\t"
			};
			var geometry = new BoxGeometry(5, 5, 5);
			var material = new ShaderMaterial({
				name: 'CubemapFromEquirect',
				uniforms: cloneUniforms(shader.uniforms),
				vertexShader: shader.vertexShader,
				fragmentShader: shader.fragmentShader,
				side: BackSide,
				blending: NoBlending
			});
			material.uniforms.tEquirect.value = texture;
			var mesh = new Mesh(geometry, material);
			var currentMinFilter = texture.minFilter; // Avoid blurred poles

			if (texture.minFilter === LinearMipmapLinearFilter) texture.minFilter = LinearFilter;
			var camera = new CubeCamera(1, 10, this);
			camera.update(renderer, mesh);
			texture.minFilter = currentMinFilter;
			mesh.geometry.dispose();
			mesh.material.dispose();
			return this;
		};

		_proto.clear = function clear(renderer, color, depth, stencil) {
			var currentRenderTarget = renderer.getRenderTarget();

			for (var i = 0; i < 6; i++) {
				renderer.setRenderTarget(this, i);
				renderer.clear(color, depth, stencil);
			}

			renderer.setRenderTarget(currentRenderTarget);
		};

		return WebGLCubeRenderTarget;
	}(WebGLRenderTarget);

	function DataTexture(data, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding) {
		Texture.call(this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding);
		this.image = {
			data: data || null,
			width: width || 1,
			height: height || 1
		};
		this.magFilter = magFilter !== undefined ? magFilter : NearestFilter;
		this.minFilter = minFilter !== undefined ? minFilter : NearestFilter;
		this.generateMipmaps = false;
		this.flipY = false;
		this.unpackAlignment = 1;
		this.needsUpdate = true;
	}

	DataTexture.prototype = Object.create(Texture.prototype);
	DataTexture.prototype.constructor = DataTexture;
	DataTexture.prototype.isDataTexture = true;

	var _sphere$1 = /*@__PURE__*/new Sphere();

	var _vector$5 = /*@__PURE__*/new Vector3();

	var Frustum = /*#__PURE__*/function () {
		function Frustum(p0, p1, p2, p3, p4, p5) {
			this.planes = [p0 !== undefined ? p0 : new Plane(), p1 !== undefined ? p1 : new Plane(), p2 !== undefined ? p2 : new Plane(), p3 !== undefined ? p3 : new Plane(), p4 !== undefined ? p4 : new Plane(), p5 !== undefined ? p5 : new Plane()];
		}

		var _proto = Frustum.prototype;

		_proto.set = function set(p0, p1, p2, p3, p4, p5) {
			var planes = this.planes;
			planes[0].copy(p0);
			planes[1].copy(p1);
			planes[2].copy(p2);
			planes[3].copy(p3);
			planes[4].copy(p4);
			planes[5].copy(p5);
			return this;
		};

		_proto.clone = function clone() {
			return new this.constructor().copy(this);
		};

		_proto.copy = function copy(frustum) {
			var planes = this.planes;

			for (var i = 0; i < 6; i++) {
				planes[i].copy(frustum.planes[i]);
			}

			return this;
		};

		_proto.setFromProjectionMatrix = function setFromProjectionMatrix(m) {
			var planes = this.planes;
			var me = m.elements;
			var me0 = me[0],
					me1 = me[1],
					me2 = me[2],
					me3 = me[3];
			var me4 = me[4],
					me5 = me[5],
					me6 = me[6],
					me7 = me[7];
			var me8 = me[8],
					me9 = me[9],
					me10 = me[10],
					me11 = me[11];
			var me12 = me[12],
					me13 = me[13],
					me14 = me[14],
					me15 = me[15];
			planes[0].setComponents(me3 - me0, me7 - me4, me11 - me8, me15 - me12).normalize();
			planes[1].setComponents(me3 + me0, me7 + me4, me11 + me8, me15 + me12).normalize();
			planes[2].setComponents(me3 + me1, me7 + me5, me11 + me9, me15 + me13).normalize();
			planes[3].setComponents(me3 - me1, me7 - me5, me11 - me9, me15 - me13).normalize();
			planes[4].setComponents(me3 - me2, me7 - me6, me11 - me10, me15 - me14).normalize();
			planes[5].setComponents(me3 + me2, me7 + me6, me11 + me10, me15 + me14).normalize();
			return this;
		};

		_proto.intersectsObject = function intersectsObject(object) {
			var geometry = object.geometry;
			if (geometry.boundingSphere === null) geometry.computeBoundingSphere();

			_sphere$1.copy(geometry.boundingSphere).applyMatrix4(object.matrixWorld);

			return this.intersectsSphere(_sphere$1);
		};

		_proto.intersectsSprite = function intersectsSprite(sprite) {
			_sphere$1.center.set(0, 0, 0);

			_sphere$1.radius = 0.7071067811865476;

			_sphere$1.applyMatrix4(sprite.matrixWorld);

			return this.intersectsSphere(_sphere$1);
		};

		_proto.intersectsSphere = function intersectsSphere(sphere) {
			var planes = this.planes;
			var center = sphere.center;
			var negRadius = -sphere.radius;

			for (var i = 0; i < 6; i++) {
				var distance = planes[i].distanceToPoint(center);

				if (distance < negRadius) {
					return false;
				}
			}

			return true;
		};

		_proto.intersectsBox = function intersectsBox(box) {
			var planes = this.planes;

			for (var i = 0; i < 6; i++) {
				var plane = planes[i]; // corner at max distance

				_vector$5.x = plane.normal.x > 0 ? box.max.x : box.min.x;
				_vector$5.y = plane.normal.y > 0 ? box.max.y : box.min.y;
				_vector$5.z = plane.normal.z > 0 ? box.max.z : box.min.z;

				if (plane.distanceToPoint(_vector$5) < 0) {
					return false;
				}
			}

			return true;
		};

		_proto.containsPoint = function containsPoint(point) {
			var planes = this.planes;

			for (var i = 0; i < 6; i++) {
				if (planes[i].distanceToPoint(point) < 0) {
					return false;
				}
			}

			return true;
		};

		return Frustum;
	}();

	function WebGLAnimation() {
		var context = null;
		var isAnimating = false;
		var animationLoop = null;
		var requestId = null;

		function onAnimationFrame(time, frame) {
			animationLoop(time, frame);
			requestId = context.requestAnimationFrame(onAnimationFrame);
		}

		return {
			start: function start() {
				if (isAnimating === true) return;
				if (animationLoop === null) return;
				requestId = context.requestAnimationFrame(onAnimationFrame);
				isAnimating = true;
			},
			stop: function stop() {
				context.cancelAnimationFrame(requestId);
				isAnimating = false;
			},
			setAnimationLoop: function setAnimationLoop(callback) {
				animationLoop = callback;
			},
			setContext: function setContext(value) {
				context = value;
			}
		};
	}

	function WebGLAttributes(gl, capabilities) {
		var isWebGL2 = capabilities.isWebGL2;
		var buffers = new WeakMap();

		function createBuffer(attribute, bufferType) {
			var array = attribute.array;
			var usage = attribute.usage;
			var buffer = gl.createBuffer();
			gl.bindBuffer(bufferType, buffer);
			gl.bufferData(bufferType, array, usage);
			attribute.onUploadCallback();
			var type = 5126;

			if (array instanceof Float32Array) {
				type = 5126;
			} else if (array instanceof Float64Array) {
				console.warn('THREE.WebGLAttributes: Unsupported data buffer format: Float64Array.');
			} else if (array instanceof Uint16Array) {
				if (attribute.isFloat16BufferAttribute) {
					if (isWebGL2) {
						type = 5131;
					} else {
						console.warn('THREE.WebGLAttributes: Usage of Float16BufferAttribute requires WebGL2.');
					}
				} else {
					type = 5123;
				}
			} else if (array instanceof Int16Array) {
				type = 5122;
			} else if (array instanceof Uint32Array) {
				type = 5125;
			} else if (array instanceof Int32Array) {
				type = 5124;
			} else if (array instanceof Int8Array) {
				type = 5120;
			} else if (array instanceof Uint8Array) {
				type = 5121;
			}

			return {
				buffer: buffer,
				type: type,
				bytesPerElement: array.BYTES_PER_ELEMENT,
				version: attribute.version
			};
		}

		function updateBuffer(buffer, attribute, bufferType) {
			var array = attribute.array;
			var updateRange = attribute.updateRange;
			gl.bindBuffer(bufferType, buffer);

			if (updateRange.count === -1) {
				// Not using update ranges
				gl.bufferSubData(bufferType, 0, array);
			} else {
				if (isWebGL2) {
					gl.bufferSubData(bufferType, updateRange.offset * array.BYTES_PER_ELEMENT, array, updateRange.offset, updateRange.count);
				} else {
					gl.bufferSubData(bufferType, updateRange.offset * array.BYTES_PER_ELEMENT, array.subarray(updateRange.offset, updateRange.offset + updateRange.count));
				}

				updateRange.count = -1; // reset range
			}
		} //


		function get(attribute) {
			if (attribute.isInterleavedBufferAttribute) attribute = attribute.data;
			return buffers.get(attribute);
		}

		function remove(attribute) {
			if (attribute.isInterleavedBufferAttribute) attribute = attribute.data;
			var data = buffers.get(attribute);

			if (data) {
				gl.deleteBuffer(data.buffer);
				buffers.delete(attribute);
			}
		}

		function update(attribute, bufferType) {
			if (attribute.isGLBufferAttribute) {
				var cached = buffers.get(attribute);

				if (!cached || cached.version < attribute.version) {
					buffers.set(attribute, {
						buffer: attribute.buffer,
						type: attribute.type,
						bytesPerElement: attribute.elementSize,
						version: attribute.version
					});
				}

				return;
			}

			if (attribute.isInterleavedBufferAttribute) attribute = attribute.data;
			var data = buffers.get(attribute);

			if (data === undefined) {
				buffers.set(attribute, createBuffer(attribute, bufferType));
			} else if (data.version < attribute.version) {
				updateBuffer(data.buffer, attribute, bufferType);
				data.version = attribute.version;
			}
		}

		return {
			get: get,
			remove: remove,
			update: update
		};
	}

	var PlaneGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(PlaneGeometry, _BufferGeometry);

		function PlaneGeometry(width, height, widthSegments, heightSegments) {
			var _this;

			if (width === void 0) {
				width = 1;
			}

			if (height === void 0) {
				height = 1;
			}

			if (widthSegments === void 0) {
				widthSegments = 1;
			}

			if (heightSegments === void 0) {
				heightSegments = 1;
			}

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'PlaneGeometry';
			_this.parameters = {
				width: width,
				height: height,
				widthSegments: widthSegments,
				heightSegments: heightSegments
			};
			var width_half = width / 2;
			var height_half = height / 2;
			var gridX = Math.floor(widthSegments);
			var gridY = Math.floor(heightSegments);
			var gridX1 = gridX + 1;
			var gridY1 = gridY + 1;
			var segment_width = width / gridX;
			var segment_height = height / gridY; //

			var indices = [];
			var vertices = [];
			var normals = [];
			var uvs = [];

			for (var iy = 0; iy < gridY1; iy++) {
				var y = iy * segment_height - height_half;

				for (var ix = 0; ix < gridX1; ix++) {
					var x = ix * segment_width - width_half;
					vertices.push(x, -y, 0);
					normals.push(0, 0, 1);
					uvs.push(ix / gridX);
					uvs.push(1 - iy / gridY);
				}
			}

			for (var _iy = 0; _iy < gridY; _iy++) {
				for (var _ix = 0; _ix < gridX; _ix++) {
					var a = _ix + gridX1 * _iy;
					var b = _ix + gridX1 * (_iy + 1);
					var c = _ix + 1 + gridX1 * (_iy + 1);
					var d = _ix + 1 + gridX1 * _iy;
					indices.push(a, b, d);
					indices.push(b, c, d);
				}
			}

			_this.setIndex(indices);

			_this.setAttribute('position', new Float32BufferAttribute(vertices, 3));

			_this.setAttribute('normal', new Float32BufferAttribute(normals, 3));

			_this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));

			return _this;
		}

		return PlaneGeometry;
	}(BufferGeometry);

	var alphamap_fragment = "#ifdef USE_ALPHAMAP\n\tdiffuseColor.a *= texture2D( alphaMap, vUv ).g;\n#endif";

	var alphamap_pars_fragment = "#ifdef USE_ALPHAMAP\n\tuniform sampler2D alphaMap;\n#endif";

	var alphatest_fragment = "#ifdef ALPHATEST\n\tif ( diffuseColor.a < ALPHATEST ) discard;\n#endif";

	var aomap_fragment = "#ifdef USE_AOMAP\n\tfloat ambientOcclusion = ( texture2D( aoMap, vUv2 ).r - 1.0 ) * aoMapIntensity + 1.0;\n\treflectedLight.indirectDiffuse *= ambientOcclusion;\n\t#if defined( USE_ENVMAP ) && defined( STANDARD )\n\t\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n\t\treflectedLight.indirectSpecular *= computeSpecularOcclusion( dotNV, ambientOcclusion, material.specularRoughness );\n\t#endif\n#endif";

	var aomap_pars_fragment = "#ifdef USE_AOMAP\n\tuniform sampler2D aoMap;\n\tuniform float aoMapIntensity;\n#endif";

	var begin_vertex = "vec3 transformed = vec3( position );";

	var beginnormal_vertex = "vec3 objectNormal = vec3( normal );\n#ifdef USE_TANGENT\n\tvec3 objectTangent = vec3( tangent.xyz );\n#endif";

	var bsdfs = "vec2 integrateSpecularBRDF( const in float dotNV, const in float roughness ) {\n\tconst vec4 c0 = vec4( - 1, - 0.0275, - 0.572, 0.022 );\n\tconst vec4 c1 = vec4( 1, 0.0425, 1.04, - 0.04 );\n\tvec4 r = roughness * c0 + c1;\n\tfloat a004 = min( r.x * r.x, exp2( - 9.28 * dotNV ) ) * r.x + r.y;\n\treturn vec2( -1.04, 1.04 ) * a004 + r.zw;\n}\nfloat punctualLightIntensityToIrradianceFactor( const in float lightDistance, const in float cutoffDistance, const in float decayExponent ) {\n#if defined ( PHYSICALLY_CORRECT_LIGHTS )\n\tfloat distanceFalloff = 1.0 / max( pow( lightDistance, decayExponent ), 0.01 );\n\tif( cutoffDistance > 0.0 ) {\n\t\tdistanceFalloff *= pow2( saturate( 1.0 - pow4( lightDistance / cutoffDistance ) ) );\n\t}\n\treturn distanceFalloff;\n#else\n\tif( cutoffDistance > 0.0 && decayExponent > 0.0 ) {\n\t\treturn pow( saturate( -lightDistance / cutoffDistance + 1.0 ), decayExponent );\n\t}\n\treturn 1.0;\n#endif\n}\nvec3 BRDF_Diffuse_Lambert( const in vec3 diffuseColor ) {\n\treturn RECIPROCAL_PI * diffuseColor;\n}\nvec3 F_Schlick( const in vec3 specularColor, const in float dotLH ) {\n\tfloat fresnel = exp2( ( -5.55473 * dotLH - 6.98316 ) * dotLH );\n\treturn ( 1.0 - specularColor ) * fresnel + specularColor;\n}\nvec3 F_Schlick_RoughnessDependent( const in vec3 F0, const in float dotNV, const in float roughness ) {\n\tfloat fresnel = exp2( ( -5.55473 * dotNV - 6.98316 ) * dotNV );\n\tvec3 Fr = max( vec3( 1.0 - roughness ), F0 ) - F0;\n\treturn Fr * fresnel + F0;\n}\nfloat G_GGX_Smith( const in float alpha, const in float dotNL, const in float dotNV ) {\n\tfloat a2 = pow2( alpha );\n\tfloat gl = dotNL + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\n\tfloat gv = dotNV + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\n\treturn 1.0 / ( gl * gv );\n}\nfloat G_GGX_SmithCorrelated( const in float alpha, const in float dotNL, const in float dotNV ) {\n\tfloat a2 = pow2( alpha );\n\tfloat gv = dotNL * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\n\tfloat gl = dotNV * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\n\treturn 0.5 / max( gv + gl, EPSILON );\n}\nfloat D_GGX( const in float alpha, const in float dotNH ) {\n\tfloat a2 = pow2( alpha );\n\tfloat denom = pow2( dotNH ) * ( a2 - 1.0 ) + 1.0;\n\treturn RECIPROCAL_PI * a2 / pow2( denom );\n}\nvec3 BRDF_Specular_GGX( const in IncidentLight incidentLight, const in vec3 viewDir, const in vec3 normal, const in vec3 specularColor, const in float roughness ) {\n\tfloat alpha = pow2( roughness );\n\tvec3 halfDir = normalize( incidentLight.direction + viewDir );\n\tfloat dotNL = saturate( dot( normal, incidentLight.direction ) );\n\tfloat dotNV = saturate( dot( normal, viewDir ) );\n\tfloat dotNH = saturate( dot( normal, halfDir ) );\n\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\n\tvec3 F = F_Schlick( specularColor, dotLH );\n\tfloat G = G_GGX_SmithCorrelated( alpha, dotNL, dotNV );\n\tfloat D = D_GGX( alpha, dotNH );\n\treturn F * ( G * D );\n}\nvec2 LTC_Uv( const in vec3 N, const in vec3 V, const in float roughness ) {\n\tconst float LUT_SIZE = 64.0;\n\tconst float LUT_SCALE = ( LUT_SIZE - 1.0 ) / LUT_SIZE;\n\tconst float LUT_BIAS = 0.5 / LUT_SIZE;\n\tfloat dotNV = saturate( dot( N, V ) );\n\tvec2 uv = vec2( roughness, sqrt( 1.0 - dotNV ) );\n\tuv = uv * LUT_SCALE + LUT_BIAS;\n\treturn uv;\n}\nfloat LTC_ClippedSphereFormFactor( const in vec3 f ) {\n\tfloat l = length( f );\n\treturn max( ( l * l + f.z ) / ( l + 1.0 ), 0.0 );\n}\nvec3 LTC_EdgeVectorFormFactor( const in vec3 v1, const in vec3 v2 ) {\n\tfloat x = dot( v1, v2 );\n\tfloat y = abs( x );\n\tfloat a = 0.8543985 + ( 0.4965155 + 0.0145206 * y ) * y;\n\tfloat b = 3.4175940 + ( 4.1616724 + y ) * y;\n\tfloat v = a / b;\n\tfloat theta_sintheta = ( x > 0.0 ) ? v : 0.5 * inversesqrt( max( 1.0 - x * x, 1e-7 ) ) - v;\n\treturn cross( v1, v2 ) * theta_sintheta;\n}\nvec3 LTC_Evaluate( const in vec3 N, const in vec3 V, const in vec3 P, const in mat3 mInv, const in vec3 rectCoords[ 4 ] ) {\n\tvec3 v1 = rectCoords[ 1 ] - rectCoords[ 0 ];\n\tvec3 v2 = rectCoords[ 3 ] - rectCoords[ 0 ];\n\tvec3 lightNormal = cross( v1, v2 );\n\tif( dot( lightNormal, P - rectCoords[ 0 ] ) < 0.0 ) return vec3( 0.0 );\n\tvec3 T1, T2;\n\tT1 = normalize( V - N * dot( V, N ) );\n\tT2 = - cross( N, T1 );\n\tmat3 mat = mInv * transposeMat3( mat3( T1, T2, N ) );\n\tvec3 coords[ 4 ];\n\tcoords[ 0 ] = mat * ( rectCoords[ 0 ] - P );\n\tcoords[ 1 ] = mat * ( rectCoords[ 1 ] - P );\n\tcoords[ 2 ] = mat * ( rectCoords[ 2 ] - P );\n\tcoords[ 3 ] = mat * ( rectCoords[ 3 ] - P );\n\tcoords[ 0 ] = normalize( coords[ 0 ] );\n\tcoords[ 1 ] = normalize( coords[ 1 ] );\n\tcoords[ 2 ] = normalize( coords[ 2 ] );\n\tcoords[ 3 ] = normalize( coords[ 3 ] );\n\tvec3 vectorFormFactor = vec3( 0.0 );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 0 ], coords[ 1 ] );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 1 ], coords[ 2 ] );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 2 ], coords[ 3 ] );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 3 ], coords[ 0 ] );\n\tfloat result = LTC_ClippedSphereFormFactor( vectorFormFactor );\n\treturn vec3( result );\n}\nvec3 BRDF_Specular_GGX_Environment( const in vec3 viewDir, const in vec3 normal, const in vec3 specularColor, const in float roughness ) {\n\tfloat dotNV = saturate( dot( normal, viewDir ) );\n\tvec2 brdf = integrateSpecularBRDF( dotNV, roughness );\n\treturn specularColor * brdf.x + brdf.y;\n}\nvoid BRDF_Specular_Multiscattering_Environment( const in GeometricContext geometry, const in vec3 specularColor, const in float roughness, inout vec3 singleScatter, inout vec3 multiScatter ) {\n\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n\tvec3 F = F_Schlick_RoughnessDependent( specularColor, dotNV, roughness );\n\tvec2 brdf = integrateSpecularBRDF( dotNV, roughness );\n\tvec3 FssEss = F * brdf.x + brdf.y;\n\tfloat Ess = brdf.x + brdf.y;\n\tfloat Ems = 1.0 - Ess;\n\tvec3 Favg = specularColor + ( 1.0 - specularColor ) * 0.047619;\tvec3 Fms = FssEss * Favg / ( 1.0 - Ems * Favg );\n\tsingleScatter += FssEss;\n\tmultiScatter += Fms * Ems;\n}\nfloat G_BlinnPhong_Implicit( ) {\n\treturn 0.25;\n}\nfloat D_BlinnPhong( const in float shininess, const in float dotNH ) {\n\treturn RECIPROCAL_PI * ( shininess * 0.5 + 1.0 ) * pow( dotNH, shininess );\n}\nvec3 BRDF_Specular_BlinnPhong( const in IncidentLight incidentLight, const in GeometricContext geometry, const in vec3 specularColor, const in float shininess ) {\n\tvec3 halfDir = normalize( incidentLight.direction + geometry.viewDir );\n\tfloat dotNH = saturate( dot( geometry.normal, halfDir ) );\n\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\n\tvec3 F = F_Schlick( specularColor, dotLH );\n\tfloat G = G_BlinnPhong_Implicit( );\n\tfloat D = D_BlinnPhong( shininess, dotNH );\n\treturn F * ( G * D );\n}\nfloat GGXRoughnessToBlinnExponent( const in float ggxRoughness ) {\n\treturn ( 2.0 / pow2( ggxRoughness + 0.0001 ) - 2.0 );\n}\nfloat BlinnExponentToGGXRoughness( const in float blinnExponent ) {\n\treturn sqrt( 2.0 / ( blinnExponent + 2.0 ) );\n}\n#if defined( USE_SHEEN )\nfloat D_Charlie(float roughness, float NoH) {\n\tfloat invAlpha = 1.0 / roughness;\n\tfloat cos2h = NoH * NoH;\n\tfloat sin2h = max(1.0 - cos2h, 0.0078125);\treturn (2.0 + invAlpha) * pow(sin2h, invAlpha * 0.5) / (2.0 * PI);\n}\nfloat V_Neubelt(float NoV, float NoL) {\n\treturn saturate(1.0 / (4.0 * (NoL + NoV - NoL * NoV)));\n}\nvec3 BRDF_Specular_Sheen( const in float roughness, const in vec3 L, const in GeometricContext geometry, vec3 specularColor ) {\n\tvec3 N = geometry.normal;\n\tvec3 V = geometry.viewDir;\n\tvec3 H = normalize( V + L );\n\tfloat dotNH = saturate( dot( N, H ) );\n\treturn specularColor * D_Charlie( roughness, dotNH ) * V_Neubelt( dot(N, V), dot(N, L) );\n}\n#endif";

	var bumpmap_pars_fragment = "#ifdef USE_BUMPMAP\n\tuniform sampler2D bumpMap;\n\tuniform float bumpScale;\n\tvec2 dHdxy_fwd() {\n\t\tvec2 dSTdx = dFdx( vUv );\n\t\tvec2 dSTdy = dFdy( vUv );\n\t\tfloat Hll = bumpScale * texture2D( bumpMap, vUv ).x;\n\t\tfloat dBx = bumpScale * texture2D( bumpMap, vUv + dSTdx ).x - Hll;\n\t\tfloat dBy = bumpScale * texture2D( bumpMap, vUv + dSTdy ).x - Hll;\n\t\treturn vec2( dBx, dBy );\n\t}\n\tvec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy ) {\n\t\tvec3 vSigmaX = vec3( dFdx( surf_pos.x ), dFdx( surf_pos.y ), dFdx( surf_pos.z ) );\n\t\tvec3 vSigmaY = vec3( dFdy( surf_pos.x ), dFdy( surf_pos.y ), dFdy( surf_pos.z ) );\n\t\tvec3 vN = surf_norm;\n\t\tvec3 R1 = cross( vSigmaY, vN );\n\t\tvec3 R2 = cross( vN, vSigmaX );\n\t\tfloat fDet = dot( vSigmaX, R1 );\n\t\tfDet *= ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t\tvec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );\n\t\treturn normalize( abs( fDet ) * surf_norm - vGrad );\n\t}\n#endif";

	var clipping_planes_fragment = "#if NUM_CLIPPING_PLANES > 0\n\tvec4 plane;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < UNION_CLIPPING_PLANES; i ++ ) {\n\t\tplane = clippingPlanes[ i ];\n\t\tif ( dot( vClipPosition, plane.xyz ) > plane.w ) discard;\n\t}\n\t#pragma unroll_loop_end\n\t#if UNION_CLIPPING_PLANES < NUM_CLIPPING_PLANES\n\t\tbool clipped = true;\n\t\t#pragma unroll_loop_start\n\t\tfor ( int i = UNION_CLIPPING_PLANES; i < NUM_CLIPPING_PLANES; i ++ ) {\n\t\t\tplane = clippingPlanes[ i ];\n\t\t\tclipped = ( dot( vClipPosition, plane.xyz ) > plane.w ) && clipped;\n\t\t}\n\t\t#pragma unroll_loop_end\n\t\tif ( clipped ) discard;\n\t#endif\n#endif";

	var clipping_planes_pars_fragment = "#if NUM_CLIPPING_PLANES > 0\n\tvarying vec3 vClipPosition;\n\tuniform vec4 clippingPlanes[ NUM_CLIPPING_PLANES ];\n#endif";

	var clipping_planes_pars_vertex = "#if NUM_CLIPPING_PLANES > 0\n\tvarying vec3 vClipPosition;\n#endif";

	var clipping_planes_vertex = "#if NUM_CLIPPING_PLANES > 0\n\tvClipPosition = - mvPosition.xyz;\n#endif";

	var color_fragment = "#ifdef USE_COLOR\n\tdiffuseColor.rgb *= vColor;\n#endif";

	var color_pars_fragment = "#ifdef USE_COLOR\n\tvarying vec3 vColor;\n#endif";

	var color_pars_vertex = "#if defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR )\n\tvarying vec3 vColor;\n#endif";

	var color_vertex = "#if defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR )\n\tvColor = vec3( 1.0 );\n#endif\n#ifdef USE_COLOR\n\tvColor.xyz *= color.xyz;\n#endif\n#ifdef USE_INSTANCING_COLOR\n\tvColor.xyz *= instanceColor.xyz;\n#endif";

	var common = "#define PI 3.141592653589793\n#define PI2 6.283185307179586\n#define PI_HALF 1.5707963267948966\n#define RECIPROCAL_PI 0.3183098861837907\n#define RECIPROCAL_PI2 0.15915494309189535\n#define EPSILON 1e-6\n#ifndef saturate\n#define saturate(a) clamp( a, 0.0, 1.0 )\n#endif\n#define whiteComplement(a) ( 1.0 - saturate( a ) )\nfloat pow2( const in float x ) { return x*x; }\nfloat pow3( const in float x ) { return x*x*x; }\nfloat pow4( const in float x ) { float x2 = x*x; return x2*x2; }\nfloat average( const in vec3 color ) { return dot( color, vec3( 0.3333 ) ); }\nhighp float rand( const in vec2 uv ) {\n\tconst highp float a = 12.9898, b = 78.233, c = 43758.5453;\n\thighp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );\n\treturn fract(sin(sn) * c);\n}\n#ifdef HIGH_PRECISION\n\tfloat precisionSafeLength( vec3 v ) { return length( v ); }\n#else\n\tfloat max3( vec3 v ) { return max( max( v.x, v.y ), v.z ); }\n\tfloat precisionSafeLength( vec3 v ) {\n\t\tfloat maxComponent = max3( abs( v ) );\n\t\treturn length( v / maxComponent ) * maxComponent;\n\t}\n#endif\nstruct IncidentLight {\n\tvec3 color;\n\tvec3 direction;\n\tbool visible;\n};\nstruct ReflectedLight {\n\tvec3 directDiffuse;\n\tvec3 directSpecular;\n\tvec3 indirectDiffuse;\n\tvec3 indirectSpecular;\n};\nstruct GeometricContext {\n\tvec3 position;\n\tvec3 normal;\n\tvec3 viewDir;\n#ifdef CLEARCOAT\n\tvec3 clearcoatNormal;\n#endif\n};\nvec3 transformDirection( in vec3 dir, in mat4 matrix ) {\n\treturn normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\n}\nvec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {\n\treturn normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );\n}\nvec3 projectOnPlane(in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\n\tfloat distance = dot( planeNormal, point - pointOnPlane );\n\treturn - distance * planeNormal + point;\n}\nfloat sideOfPlane( in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\n\treturn sign( dot( point - pointOnPlane, planeNormal ) );\n}\nvec3 linePlaneIntersect( in vec3 pointOnLine, in vec3 lineDirection, in vec3 pointOnPlane, in vec3 planeNormal ) {\n\treturn lineDirection * ( dot( planeNormal, pointOnPlane - pointOnLine ) / dot( planeNormal, lineDirection ) ) + pointOnLine;\n}\nmat3 transposeMat3( const in mat3 m ) {\n\tmat3 tmp;\n\ttmp[ 0 ] = vec3( m[ 0 ].x, m[ 1 ].x, m[ 2 ].x );\n\ttmp[ 1 ] = vec3( m[ 0 ].y, m[ 1 ].y, m[ 2 ].y );\n\ttmp[ 2 ] = vec3( m[ 0 ].z, m[ 1 ].z, m[ 2 ].z );\n\treturn tmp;\n}\nfloat linearToRelativeLuminance( const in vec3 color ) {\n\tvec3 weights = vec3( 0.2126, 0.7152, 0.0722 );\n\treturn dot( weights, color.rgb );\n}\nbool isPerspectiveMatrix( mat4 m ) {\n\treturn m[ 2 ][ 3 ] == - 1.0;\n}\nvec2 equirectUv( in vec3 dir ) {\n\tfloat u = atan( dir.z, dir.x ) * RECIPROCAL_PI2 + 0.5;\n\tfloat v = asin( clamp( dir.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\n\treturn vec2( u, v );\n}";

	var cube_uv_reflection_fragment = "#ifdef ENVMAP_TYPE_CUBE_UV\n\t#define cubeUV_maxMipLevel 8.0\n\t#define cubeUV_minMipLevel 4.0\n\t#define cubeUV_maxTileSize 256.0\n\t#define cubeUV_minTileSize 16.0\n\tfloat getFace( vec3 direction ) {\n\t\tvec3 absDirection = abs( direction );\n\t\tfloat face = - 1.0;\n\t\tif ( absDirection.x > absDirection.z ) {\n\t\t\tif ( absDirection.x > absDirection.y )\n\t\t\t\tface = direction.x > 0.0 ? 0.0 : 3.0;\n\t\t\telse\n\t\t\t\tface = direction.y > 0.0 ? 1.0 : 4.0;\n\t\t} else {\n\t\t\tif ( absDirection.z > absDirection.y )\n\t\t\t\tface = direction.z > 0.0 ? 2.0 : 5.0;\n\t\t\telse\n\t\t\t\tface = direction.y > 0.0 ? 1.0 : 4.0;\n\t\t}\n\t\treturn face;\n\t}\n\tvec2 getUV( vec3 direction, float face ) {\n\t\tvec2 uv;\n\t\tif ( face == 0.0 ) {\n\t\t\tuv = vec2( direction.z, direction.y ) / abs( direction.x );\n\t\t} else if ( face == 1.0 ) {\n\t\t\tuv = vec2( - direction.x, - direction.z ) / abs( direction.y );\n\t\t} else if ( face == 2.0 ) {\n\t\t\tuv = vec2( - direction.x, direction.y ) / abs( direction.z );\n\t\t} else if ( face == 3.0 ) {\n\t\t\tuv = vec2( - direction.z, direction.y ) / abs( direction.x );\n\t\t} else if ( face == 4.0 ) {\n\t\t\tuv = vec2( - direction.x, direction.z ) / abs( direction.y );\n\t\t} else {\n\t\t\tuv = vec2( direction.x, direction.y ) / abs( direction.z );\n\t\t}\n\t\treturn 0.5 * ( uv + 1.0 );\n\t}\n\tvec3 bilinearCubeUV( sampler2D envMap, vec3 direction, float mipInt ) {\n\t\tfloat face = getFace( direction );\n\t\tfloat filterInt = max( cubeUV_minMipLevel - mipInt, 0.0 );\n\t\tmipInt = max( mipInt, cubeUV_minMipLevel );\n\t\tfloat faceSize = exp2( mipInt );\n\t\tfloat texelSize = 1.0 / ( 3.0 * cubeUV_maxTileSize );\n\t\tvec2 uv = getUV( direction, face ) * ( faceSize - 1.0 );\n\t\tvec2 f = fract( uv );\n\t\tuv += 0.5 - f;\n\t\tif ( face > 2.0 ) {\n\t\t\tuv.y += faceSize;\n\t\t\tface -= 3.0;\n\t\t}\n\t\tuv.x += face * faceSize;\n\t\tif ( mipInt < cubeUV_maxMipLevel ) {\n\t\t\tuv.y += 2.0 * cubeUV_maxTileSize;\n\t\t}\n\t\tuv.y += filterInt * 2.0 * cubeUV_minTileSize;\n\t\tuv.x += 3.0 * max( 0.0, cubeUV_maxTileSize - 2.0 * faceSize );\n\t\tuv *= texelSize;\n\t\tvec3 tl = envMapTexelToLinear( texture2D( envMap, uv ) ).rgb;\n\t\tuv.x += texelSize;\n\t\tvec3 tr = envMapTexelToLinear( texture2D( envMap, uv ) ).rgb;\n\t\tuv.y += texelSize;\n\t\tvec3 br = envMapTexelToLinear( texture2D( envMap, uv ) ).rgb;\n\t\tuv.x -= texelSize;\n\t\tvec3 bl = envMapTexelToLinear( texture2D( envMap, uv ) ).rgb;\n\t\tvec3 tm = mix( tl, tr, f.x );\n\t\tvec3 bm = mix( bl, br, f.x );\n\t\treturn mix( tm, bm, f.y );\n\t}\n\t#define r0 1.0\n\t#define v0 0.339\n\t#define m0 - 2.0\n\t#define r1 0.8\n\t#define v1 0.276\n\t#define m1 - 1.0\n\t#define r4 0.4\n\t#define v4 0.046\n\t#define m4 2.0\n\t#define r5 0.305\n\t#define v5 0.016\n\t#define m5 3.0\n\t#define r6 0.21\n\t#define v6 0.0038\n\t#define m6 4.0\n\tfloat roughnessToMip( float roughness ) {\n\t\tfloat mip = 0.0;\n\t\tif ( roughness >= r1 ) {\n\t\t\tmip = ( r0 - roughness ) * ( m1 - m0 ) / ( r0 - r1 ) + m0;\n\t\t} else if ( roughness >= r4 ) {\n\t\t\tmip = ( r1 - roughness ) * ( m4 - m1 ) / ( r1 - r4 ) + m1;\n\t\t} else if ( roughness >= r5 ) {\n\t\t\tmip = ( r4 - roughness ) * ( m5 - m4 ) / ( r4 - r5 ) + m4;\n\t\t} else if ( roughness >= r6 ) {\n\t\t\tmip = ( r5 - roughness ) * ( m6 - m5 ) / ( r5 - r6 ) + m5;\n\t\t} else {\n\t\t\tmip = - 2.0 * log2( 1.16 * roughness );\t\t}\n\t\treturn mip;\n\t}\n\tvec4 textureCubeUV( sampler2D envMap, vec3 sampleDir, float roughness ) {\n\t\tfloat mip = clamp( roughnessToMip( roughness ), m0, cubeUV_maxMipLevel );\n\t\tfloat mipF = fract( mip );\n\t\tfloat mipInt = floor( mip );\n\t\tvec3 color0 = bilinearCubeUV( envMap, sampleDir, mipInt );\n\t\tif ( mipF == 0.0 ) {\n\t\t\treturn vec4( color0, 1.0 );\n\t\t} else {\n\t\t\tvec3 color1 = bilinearCubeUV( envMap, sampleDir, mipInt + 1.0 );\n\t\t\treturn vec4( mix( color0, color1, mipF ), 1.0 );\n\t\t}\n\t}\n#endif";

	var defaultnormal_vertex = "vec3 transformedNormal = objectNormal;\n#ifdef USE_INSTANCING\n\tmat3 m = mat3( instanceMatrix );\n\ttransformedNormal /= vec3( dot( m[ 0 ], m[ 0 ] ), dot( m[ 1 ], m[ 1 ] ), dot( m[ 2 ], m[ 2 ] ) );\n\ttransformedNormal = m * transformedNormal;\n#endif\ntransformedNormal = normalMatrix * transformedNormal;\n#ifdef FLIP_SIDED\n\ttransformedNormal = - transformedNormal;\n#endif\n#ifdef USE_TANGENT\n\tvec3 transformedTangent = ( modelViewMatrix * vec4( objectTangent, 0.0 ) ).xyz;\n\t#ifdef FLIP_SIDED\n\t\ttransformedTangent = - transformedTangent;\n\t#endif\n#endif";

	var displacementmap_pars_vertex = "#ifdef USE_DISPLACEMENTMAP\n\tuniform sampler2D displacementMap;\n\tuniform float displacementScale;\n\tuniform float displacementBias;\n#endif";

	var displacementmap_vertex = "#ifdef USE_DISPLACEMENTMAP\n\ttransformed += normalize( objectNormal ) * ( texture2D( displacementMap, vUv ).x * displacementScale + displacementBias );\n#endif";

	var emissivemap_fragment = "#ifdef USE_EMISSIVEMAP\n\tvec4 emissiveColor = texture2D( emissiveMap, vUv );\n\temissiveColor.rgb = emissiveMapTexelToLinear( emissiveColor ).rgb;\n\ttotalEmissiveRadiance *= emissiveColor.rgb;\n#endif";

	var emissivemap_pars_fragment = "#ifdef USE_EMISSIVEMAP\n\tuniform sampler2D emissiveMap;\n#endif";

	var encodings_fragment = "gl_FragColor = linearToOutputTexel( gl_FragColor );";

	var encodings_pars_fragment = "\nvec4 LinearToLinear( in vec4 value ) {\n\treturn value;\n}\nvec4 GammaToLinear( in vec4 value, in float gammaFactor ) {\n\treturn vec4( pow( value.rgb, vec3( gammaFactor ) ), value.a );\n}\nvec4 LinearToGamma( in vec4 value, in float gammaFactor ) {\n\treturn vec4( pow( value.rgb, vec3( 1.0 / gammaFactor ) ), value.a );\n}\nvec4 sRGBToLinear( in vec4 value ) {\n\treturn vec4( mix( pow( value.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), value.rgb * 0.0773993808, vec3( lessThanEqual( value.rgb, vec3( 0.04045 ) ) ) ), value.a );\n}\nvec4 LinearTosRGB( in vec4 value ) {\n\treturn vec4( mix( pow( value.rgb, vec3( 0.41666 ) ) * 1.055 - vec3( 0.055 ), value.rgb * 12.92, vec3( lessThanEqual( value.rgb, vec3( 0.0031308 ) ) ) ), value.a );\n}\nvec4 RGBEToLinear( in vec4 value ) {\n\treturn vec4( value.rgb * exp2( value.a * 255.0 - 128.0 ), 1.0 );\n}\nvec4 LinearToRGBE( in vec4 value ) {\n\tfloat maxComponent = max( max( value.r, value.g ), value.b );\n\tfloat fExp = clamp( ceil( log2( maxComponent ) ), -128.0, 127.0 );\n\treturn vec4( value.rgb / exp2( fExp ), ( fExp + 128.0 ) / 255.0 );\n}\nvec4 RGBMToLinear( in vec4 value, in float maxRange ) {\n\treturn vec4( value.rgb * value.a * maxRange, 1.0 );\n}\nvec4 LinearToRGBM( in vec4 value, in float maxRange ) {\n\tfloat maxRGB = max( value.r, max( value.g, value.b ) );\n\tfloat M = clamp( maxRGB / maxRange, 0.0, 1.0 );\n\tM = ceil( M * 255.0 ) / 255.0;\n\treturn vec4( value.rgb / ( M * maxRange ), M );\n}\nvec4 RGBDToLinear( in vec4 value, in float maxRange ) {\n\treturn vec4( value.rgb * ( ( maxRange / 255.0 ) / value.a ), 1.0 );\n}\nvec4 LinearToRGBD( in vec4 value, in float maxRange ) {\n\tfloat maxRGB = max( value.r, max( value.g, value.b ) );\n\tfloat D = max( maxRange / maxRGB, 1.0 );\n\tD = clamp( floor( D ) / 255.0, 0.0, 1.0 );\n\treturn vec4( value.rgb * ( D * ( 255.0 / maxRange ) ), D );\n}\nconst mat3 cLogLuvM = mat3( 0.2209, 0.3390, 0.4184, 0.1138, 0.6780, 0.7319, 0.0102, 0.1130, 0.2969 );\nvec4 LinearToLogLuv( in vec4 value ) {\n\tvec3 Xp_Y_XYZp = cLogLuvM * value.rgb;\n\tXp_Y_XYZp = max( Xp_Y_XYZp, vec3( 1e-6, 1e-6, 1e-6 ) );\n\tvec4 vResult;\n\tvResult.xy = Xp_Y_XYZp.xy / Xp_Y_XYZp.z;\n\tfloat Le = 2.0 * log2(Xp_Y_XYZp.y) + 127.0;\n\tvResult.w = fract( Le );\n\tvResult.z = ( Le - ( floor( vResult.w * 255.0 ) ) / 255.0 ) / 255.0;\n\treturn vResult;\n}\nconst mat3 cLogLuvInverseM = mat3( 6.0014, -2.7008, -1.7996, -1.3320, 3.1029, -5.7721, 0.3008, -1.0882, 5.6268 );\nvec4 LogLuvToLinear( in vec4 value ) {\n\tfloat Le = value.z * 255.0 + value.w;\n\tvec3 Xp_Y_XYZp;\n\tXp_Y_XYZp.y = exp2( ( Le - 127.0 ) / 2.0 );\n\tXp_Y_XYZp.z = Xp_Y_XYZp.y / value.y;\n\tXp_Y_XYZp.x = value.x * Xp_Y_XYZp.z;\n\tvec3 vRGB = cLogLuvInverseM * Xp_Y_XYZp.rgb;\n\treturn vec4( max( vRGB, 0.0 ), 1.0 );\n}";

	var envmap_fragment = "#ifdef USE_ENVMAP\n\t#ifdef ENV_WORLDPOS\n\t\tvec3 cameraToFrag;\n\t\tif ( isOrthographic ) {\n\t\t\tcameraToFrag = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\n\t\t} else {\n\t\t\tcameraToFrag = normalize( vWorldPosition - cameraPosition );\n\t\t}\n\t\tvec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvec3 reflectVec = reflect( cameraToFrag, worldNormal );\n\t\t#else\n\t\t\tvec3 reflectVec = refract( cameraToFrag, worldNormal, refractionRatio );\n\t\t#endif\n\t#else\n\t\tvec3 reflectVec = vReflect;\n\t#endif\n\t#ifdef ENVMAP_TYPE_CUBE\n\t\tvec4 envColor = textureCube( envMap, vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );\n\t#elif defined( ENVMAP_TYPE_CUBE_UV )\n\t\tvec4 envColor = textureCubeUV( envMap, reflectVec, 0.0 );\n\t#else\n\t\tvec4 envColor = vec4( 0.0 );\n\t#endif\n\t#ifndef ENVMAP_TYPE_CUBE_UV\n\t\tenvColor = envMapTexelToLinear( envColor );\n\t#endif\n\t#ifdef ENVMAP_BLENDING_MULTIPLY\n\t\toutgoingLight = mix( outgoingLight, outgoingLight * envColor.xyz, specularStrength * reflectivity );\n\t#elif defined( ENVMAP_BLENDING_MIX )\n\t\toutgoingLight = mix( outgoingLight, envColor.xyz, specularStrength * reflectivity );\n\t#elif defined( ENVMAP_BLENDING_ADD )\n\t\toutgoingLight += envColor.xyz * specularStrength * reflectivity;\n\t#endif\n#endif";

	var envmap_common_pars_fragment = "#ifdef USE_ENVMAP\n\tuniform float envMapIntensity;\n\tuniform float flipEnvMap;\n\tuniform int maxMipLevel;\n\t#ifdef ENVMAP_TYPE_CUBE\n\t\tuniform samplerCube envMap;\n\t#else\n\t\tuniform sampler2D envMap;\n\t#endif\n\t\n#endif";

	var envmap_pars_fragment = "#ifdef USE_ENVMAP\n\tuniform float reflectivity;\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\n\t\t#define ENV_WORLDPOS\n\t#endif\n\t#ifdef ENV_WORLDPOS\n\t\tvarying vec3 vWorldPosition;\n\t\tuniform float refractionRatio;\n\t#else\n\t\tvarying vec3 vReflect;\n\t#endif\n#endif";

	var envmap_pars_vertex = "#ifdef USE_ENVMAP\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) ||defined( PHONG )\n\t\t#define ENV_WORLDPOS\n\t#endif\n\t#ifdef ENV_WORLDPOS\n\t\t\n\t\tvarying vec3 vWorldPosition;\n\t#else\n\t\tvarying vec3 vReflect;\n\t\tuniform float refractionRatio;\n\t#endif\n#endif";

	var envmap_vertex = "#ifdef USE_ENVMAP\n\t#ifdef ENV_WORLDPOS\n\t\tvWorldPosition = worldPosition.xyz;\n\t#else\n\t\tvec3 cameraToVertex;\n\t\tif ( isOrthographic ) {\n\t\t\tcameraToVertex = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\n\t\t} else {\n\t\t\tcameraToVertex = normalize( worldPosition.xyz - cameraPosition );\n\t\t}\n\t\tvec3 worldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvReflect = reflect( cameraToVertex, worldNormal );\n\t\t#else\n\t\t\tvReflect = refract( cameraToVertex, worldNormal, refractionRatio );\n\t\t#endif\n\t#endif\n#endif";

	var fog_vertex = "#ifdef USE_FOG\n\tfogDepth = - mvPosition.z;\n#endif";

	var fog_pars_vertex = "#ifdef USE_FOG\n\tvarying float fogDepth;\n#endif";

	var fog_fragment = "#ifdef USE_FOG\n\t#ifdef FOG_EXP2\n\t\tfloat fogFactor = 1.0 - exp( - fogDensity * fogDensity * fogDepth * fogDepth );\n\t#else\n\t\tfloat fogFactor = smoothstep( fogNear, fogFar, fogDepth );\n\t#endif\n\tgl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );\n#endif";

	var fog_pars_fragment = "#ifdef USE_FOG\n\tuniform vec3 fogColor;\n\tvarying float fogDepth;\n\t#ifdef FOG_EXP2\n\t\tuniform float fogDensity;\n\t#else\n\t\tuniform float fogNear;\n\t\tuniform float fogFar;\n\t#endif\n#endif";

	var gradientmap_pars_fragment = "#ifdef USE_GRADIENTMAP\n\tuniform sampler2D gradientMap;\n#endif\nvec3 getGradientIrradiance( vec3 normal, vec3 lightDirection ) {\n\tfloat dotNL = dot( normal, lightDirection );\n\tvec2 coord = vec2( dotNL * 0.5 + 0.5, 0.0 );\n\t#ifdef USE_GRADIENTMAP\n\t\treturn texture2D( gradientMap, coord ).rgb;\n\t#else\n\t\treturn ( coord.x < 0.7 ) ? vec3( 0.7 ) : vec3( 1.0 );\n\t#endif\n}";

	var lightmap_fragment = "#ifdef USE_LIGHTMAP\n\tvec4 lightMapTexel= texture2D( lightMap, vUv2 );\n\treflectedLight.indirectDiffuse += PI * lightMapTexelToLinear( lightMapTexel ).rgb * lightMapIntensity;\n#endif";

	var lightmap_pars_fragment = "#ifdef USE_LIGHTMAP\n\tuniform sampler2D lightMap;\n\tuniform float lightMapIntensity;\n#endif";

	var lights_lambert_vertex = "vec3 diffuse = vec3( 1.0 );\nGeometricContext geometry;\ngeometry.position = mvPosition.xyz;\ngeometry.normal = normalize( transformedNormal );\ngeometry.viewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( -mvPosition.xyz );\nGeometricContext backGeometry;\nbackGeometry.position = geometry.position;\nbackGeometry.normal = -geometry.normal;\nbackGeometry.viewDir = geometry.viewDir;\nvLightFront = vec3( 0.0 );\nvIndirectFront = vec3( 0.0 );\n#ifdef DOUBLE_SIDED\n\tvLightBack = vec3( 0.0 );\n\tvIndirectBack = vec3( 0.0 );\n#endif\nIncidentLight directLight;\nfloat dotNL;\nvec3 directLightColor_Diffuse;\nvIndirectFront += getAmbientLightIrradiance( ambientLightColor );\nvIndirectFront += getLightProbeIrradiance( lightProbe, geometry );\n#ifdef DOUBLE_SIDED\n\tvIndirectBack += getAmbientLightIrradiance( ambientLightColor );\n\tvIndirectBack += getLightProbeIrradiance( lightProbe, backGeometry );\n#endif\n#if NUM_POINT_LIGHTS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tgetPointDirectLightIrradiance( pointLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if NUM_SPOT_LIGHTS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tgetSpotDirectLightIrradiance( spotLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if NUM_DIR_LIGHTS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tgetDirectionalDirectLightIrradiance( directionalLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if NUM_HEMI_LIGHTS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\n\t\tvIndirectFront += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvIndirectBack += getHemisphereLightIrradiance( hemisphereLights[ i ], backGeometry );\n\t\t#endif\n\t}\n\t#pragma unroll_loop_end\n#endif";

	var lights_pars_begin = "uniform bool receiveShadow;\nuniform vec3 ambientLightColor;\nuniform vec3 lightProbe[ 9 ];\nvec3 shGetIrradianceAt( in vec3 normal, in vec3 shCoefficients[ 9 ] ) {\n\tfloat x = normal.x, y = normal.y, z = normal.z;\n\tvec3 result = shCoefficients[ 0 ] * 0.886227;\n\tresult += shCoefficients[ 1 ] * 2.0 * 0.511664 * y;\n\tresult += shCoefficients[ 2 ] * 2.0 * 0.511664 * z;\n\tresult += shCoefficients[ 3 ] * 2.0 * 0.511664 * x;\n\tresult += shCoefficients[ 4 ] * 2.0 * 0.429043 * x * y;\n\tresult += shCoefficients[ 5 ] * 2.0 * 0.429043 * y * z;\n\tresult += shCoefficients[ 6 ] * ( 0.743125 * z * z - 0.247708 );\n\tresult += shCoefficients[ 7 ] * 2.0 * 0.429043 * x * z;\n\tresult += shCoefficients[ 8 ] * 0.429043 * ( x * x - y * y );\n\treturn result;\n}\nvec3 getLightProbeIrradiance( const in vec3 lightProbe[ 9 ], const in GeometricContext geometry ) {\n\tvec3 worldNormal = inverseTransformDirection( geometry.normal, viewMatrix );\n\tvec3 irradiance = shGetIrradianceAt( worldNormal, lightProbe );\n\treturn irradiance;\n}\nvec3 getAmbientLightIrradiance( const in vec3 ambientLightColor ) {\n\tvec3 irradiance = ambientLightColor;\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\treturn irradiance;\n}\n#if NUM_DIR_LIGHTS > 0\n\tstruct DirectionalLight {\n\t\tvec3 direction;\n\t\tvec3 color;\n\t};\n\tuniform DirectionalLight directionalLights[ NUM_DIR_LIGHTS ];\n\tvoid getDirectionalDirectLightIrradiance( const in DirectionalLight directionalLight, const in GeometricContext geometry, out IncidentLight directLight ) {\n\t\tdirectLight.color = directionalLight.color;\n\t\tdirectLight.direction = directionalLight.direction;\n\t\tdirectLight.visible = true;\n\t}\n#endif\n#if NUM_POINT_LIGHTS > 0\n\tstruct PointLight {\n\t\tvec3 position;\n\t\tvec3 color;\n\t\tfloat distance;\n\t\tfloat decay;\n\t};\n\tuniform PointLight pointLights[ NUM_POINT_LIGHTS ];\n\tvoid getPointDirectLightIrradiance( const in PointLight pointLight, const in GeometricContext geometry, out IncidentLight directLight ) {\n\t\tvec3 lVector = pointLight.position - geometry.position;\n\t\tdirectLight.direction = normalize( lVector );\n\t\tfloat lightDistance = length( lVector );\n\t\tdirectLight.color = pointLight.color;\n\t\tdirectLight.color *= punctualLightIntensityToIrradianceFactor( lightDistance, pointLight.distance, pointLight.decay );\n\t\tdirectLight.visible = ( directLight.color != vec3( 0.0 ) );\n\t}\n#endif\n#if NUM_SPOT_LIGHTS > 0\n\tstruct SpotLight {\n\t\tvec3 position;\n\t\tvec3 direction;\n\t\tvec3 color;\n\t\tfloat distance;\n\t\tfloat decay;\n\t\tfloat coneCos;\n\t\tfloat penumbraCos;\n\t};\n\tuniform SpotLight spotLights[ NUM_SPOT_LIGHTS ];\n\tvoid getSpotDirectLightIrradiance( const in SpotLight spotLight, const in GeometricContext geometry, out IncidentLight directLight ) {\n\t\tvec3 lVector = spotLight.position - geometry.position;\n\t\tdirectLight.direction = normalize( lVector );\n\t\tfloat lightDistance = length( lVector );\n\t\tfloat angleCos = dot( directLight.direction, spotLight.direction );\n\t\tif ( angleCos > spotLight.coneCos ) {\n\t\t\tfloat spotEffect = smoothstep( spotLight.coneCos, spotLight.penumbraCos, angleCos );\n\t\t\tdirectLight.color = spotLight.color;\n\t\t\tdirectLight.color *= spotEffect * punctualLightIntensityToIrradianceFactor( lightDistance, spotLight.distance, spotLight.decay );\n\t\t\tdirectLight.visible = true;\n\t\t} else {\n\t\t\tdirectLight.color = vec3( 0.0 );\n\t\t\tdirectLight.visible = false;\n\t\t}\n\t}\n#endif\n#if NUM_RECT_AREA_LIGHTS > 0\n\tstruct RectAreaLight {\n\t\tvec3 color;\n\t\tvec3 position;\n\t\tvec3 halfWidth;\n\t\tvec3 halfHeight;\n\t};\n\tuniform sampler2D ltc_1;\tuniform sampler2D ltc_2;\n\tuniform RectAreaLight rectAreaLights[ NUM_RECT_AREA_LIGHTS ];\n#endif\n#if NUM_HEMI_LIGHTS > 0\n\tstruct HemisphereLight {\n\t\tvec3 direction;\n\t\tvec3 skyColor;\n\t\tvec3 groundColor;\n\t};\n\tuniform HemisphereLight hemisphereLights[ NUM_HEMI_LIGHTS ];\n\tvec3 getHemisphereLightIrradiance( const in HemisphereLight hemiLight, const in GeometricContext geometry ) {\n\t\tfloat dotNL = dot( geometry.normal, hemiLight.direction );\n\t\tfloat hemiDiffuseWeight = 0.5 * dotNL + 0.5;\n\t\tvec3 irradiance = mix( hemiLight.groundColor, hemiLight.skyColor, hemiDiffuseWeight );\n\t\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\t\tirradiance *= PI;\n\t\t#endif\n\t\treturn irradiance;\n\t}\n#endif";

	var envmap_physical_pars_fragment = "#if defined( USE_ENVMAP )\n\t#ifdef ENVMAP_MODE_REFRACTION\n\t\tuniform float refractionRatio;\n\t#endif\n\tvec3 getLightProbeIndirectIrradiance( const in GeometricContext geometry, const in int maxMIPLevel ) {\n\t\tvec3 worldNormal = inverseTransformDirection( geometry.normal, viewMatrix );\n\t\t#ifdef ENVMAP_TYPE_CUBE\n\t\t\tvec3 queryVec = vec3( flipEnvMap * worldNormal.x, worldNormal.yz );\n\t\t\t#ifdef TEXTURE_LOD_EXT\n\t\t\t\tvec4 envMapColor = textureCubeLodEXT( envMap, queryVec, float( maxMIPLevel ) );\n\t\t\t#else\n\t\t\t\tvec4 envMapColor = textureCube( envMap, queryVec, float( maxMIPLevel ) );\n\t\t\t#endif\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\n\t\t#elif defined( ENVMAP_TYPE_CUBE_UV )\n\t\t\tvec4 envMapColor = textureCubeUV( envMap, worldNormal, 1.0 );\n\t\t#else\n\t\t\tvec4 envMapColor = vec4( 0.0 );\n\t\t#endif\n\t\treturn PI * envMapColor.rgb * envMapIntensity;\n\t}\n\tfloat getSpecularMIPLevel( const in float roughness, const in int maxMIPLevel ) {\n\t\tfloat maxMIPLevelScalar = float( maxMIPLevel );\n\t\tfloat sigma = PI * roughness * roughness / ( 1.0 + roughness );\n\t\tfloat desiredMIPLevel = maxMIPLevelScalar + log2( sigma );\n\t\treturn clamp( desiredMIPLevel, 0.0, maxMIPLevelScalar );\n\t}\n\tvec3 getLightProbeIndirectRadiance( const in vec3 viewDir, const in vec3 normal, const in float roughness, const in int maxMIPLevel ) {\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvec3 reflectVec = reflect( -viewDir, normal );\n\t\t\treflectVec = normalize( mix( reflectVec, normal, roughness * roughness) );\n\t\t#else\n\t\t\tvec3 reflectVec = refract( -viewDir, normal, refractionRatio );\n\t\t#endif\n\t\treflectVec = inverseTransformDirection( reflectVec, viewMatrix );\n\t\tfloat specularMIPLevel = getSpecularMIPLevel( roughness, maxMIPLevel );\n\t\t#ifdef ENVMAP_TYPE_CUBE\n\t\t\tvec3 queryReflectVec = vec3( flipEnvMap * reflectVec.x, reflectVec.yz );\n\t\t\t#ifdef TEXTURE_LOD_EXT\n\t\t\t\tvec4 envMapColor = textureCubeLodEXT( envMap, queryReflectVec, specularMIPLevel );\n\t\t\t#else\n\t\t\t\tvec4 envMapColor = textureCube( envMap, queryReflectVec, specularMIPLevel );\n\t\t\t#endif\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\n\t\t#elif defined( ENVMAP_TYPE_CUBE_UV )\n\t\t\tvec4 envMapColor = textureCubeUV( envMap, reflectVec, roughness );\n\t\t#endif\n\t\treturn envMapColor.rgb * envMapIntensity;\n\t}\n#endif";

	var lights_toon_fragment = "ToonMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb;";

	var lights_toon_pars_fragment = "varying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\nstruct ToonMaterial {\n\tvec3 diffuseColor;\n};\nvoid RE_Direct_Toon( const in IncidentLight directLight, const in GeometricContext geometry, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\n\tvec3 irradiance = getGradientIrradiance( geometry.normal, directLight.direction ) * directLight.color;\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\treflectedLight.directDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectDiffuse_Toon( const in vec3 irradiance, const in GeometricContext geometry, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\n#define RE_Direct\t\t\t\tRE_Direct_Toon\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_Toon\n#define Material_LightProbeLOD( material )\t(0)";

	var lights_phong_fragment = "BlinnPhongMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb;\nmaterial.specularColor = specular;\nmaterial.specularShininess = shininess;\nmaterial.specularStrength = specularStrength;";

	var lights_phong_pars_fragment = "varying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\nstruct BlinnPhongMaterial {\n\tvec3 diffuseColor;\n\tvec3 specularColor;\n\tfloat specularShininess;\n\tfloat specularStrength;\n};\nvoid RE_Direct_BlinnPhong( const in IncidentLight directLight, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\n\tvec3 irradiance = dotNL * directLight.color;\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\treflectedLight.directDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n\treflectedLight.directSpecular += irradiance * BRDF_Specular_BlinnPhong( directLight, geometry, material.specularColor, material.specularShininess ) * material.specularStrength;\n}\nvoid RE_IndirectDiffuse_BlinnPhong( const in vec3 irradiance, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\n#define RE_Direct\t\t\t\tRE_Direct_BlinnPhong\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_BlinnPhong\n#define Material_LightProbeLOD( material )\t(0)";

	var lights_physical_fragment = "PhysicalMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb * ( 1.0 - metalnessFactor );\nvec3 dxy = max( abs( dFdx( geometryNormal ) ), abs( dFdy( geometryNormal ) ) );\nfloat geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );\nmaterial.specularRoughness = max( roughnessFactor, 0.0525 );material.specularRoughness += geometryRoughness;\nmaterial.specularRoughness = min( material.specularRoughness, 1.0 );\n#ifdef REFLECTIVITY\n\tmaterial.specularColor = mix( vec3( MAXIMUM_SPECULAR_COEFFICIENT * pow2( reflectivity ) ), diffuseColor.rgb, metalnessFactor );\n#else\n\tmaterial.specularColor = mix( vec3( DEFAULT_SPECULAR_COEFFICIENT ), diffuseColor.rgb, metalnessFactor );\n#endif\n#ifdef CLEARCOAT\n\tmaterial.clearcoat = clearcoat;\n\tmaterial.clearcoatRoughness = clearcoatRoughness;\n\t#ifdef USE_CLEARCOATMAP\n\t\tmaterial.clearcoat *= texture2D( clearcoatMap, vUv ).x;\n\t#endif\n\t#ifdef USE_CLEARCOAT_ROUGHNESSMAP\n\t\tmaterial.clearcoatRoughness *= texture2D( clearcoatRoughnessMap, vUv ).y;\n\t#endif\n\tmaterial.clearcoat = saturate( material.clearcoat );\tmaterial.clearcoatRoughness = max( material.clearcoatRoughness, 0.0525 );\n\tmaterial.clearcoatRoughness += geometryRoughness;\n\tmaterial.clearcoatRoughness = min( material.clearcoatRoughness, 1.0 );\n#endif\n#ifdef USE_SHEEN\n\tmaterial.sheenColor = sheen;\n#endif";

	var lights_physical_pars_fragment = "struct PhysicalMaterial {\n\tvec3 diffuseColor;\n\tfloat specularRoughness;\n\tvec3 specularColor;\n#ifdef CLEARCOAT\n\tfloat clearcoat;\n\tfloat clearcoatRoughness;\n#endif\n#ifdef USE_SHEEN\n\tvec3 sheenColor;\n#endif\n};\n#define MAXIMUM_SPECULAR_COEFFICIENT 0.16\n#define DEFAULT_SPECULAR_COEFFICIENT 0.04\nfloat clearcoatDHRApprox( const in float roughness, const in float dotNL ) {\n\treturn DEFAULT_SPECULAR_COEFFICIENT + ( 1.0 - DEFAULT_SPECULAR_COEFFICIENT ) * ( pow( 1.0 - dotNL, 5.0 ) * pow( 1.0 - roughness, 2.0 ) );\n}\n#if NUM_RECT_AREA_LIGHTS > 0\n\tvoid RE_Direct_RectArea_Physical( const in RectAreaLight rectAreaLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\t\tvec3 normal = geometry.normal;\n\t\tvec3 viewDir = geometry.viewDir;\n\t\tvec3 position = geometry.position;\n\t\tvec3 lightPos = rectAreaLight.position;\n\t\tvec3 halfWidth = rectAreaLight.halfWidth;\n\t\tvec3 halfHeight = rectAreaLight.halfHeight;\n\t\tvec3 lightColor = rectAreaLight.color;\n\t\tfloat roughness = material.specularRoughness;\n\t\tvec3 rectCoords[ 4 ];\n\t\trectCoords[ 0 ] = lightPos + halfWidth - halfHeight;\t\trectCoords[ 1 ] = lightPos - halfWidth - halfHeight;\n\t\trectCoords[ 2 ] = lightPos - halfWidth + halfHeight;\n\t\trectCoords[ 3 ] = lightPos + halfWidth + halfHeight;\n\t\tvec2 uv = LTC_Uv( normal, viewDir, roughness );\n\t\tvec4 t1 = texture2D( ltc_1, uv );\n\t\tvec4 t2 = texture2D( ltc_2, uv );\n\t\tmat3 mInv = mat3(\n\t\t\tvec3( t1.x, 0, t1.y ),\n\t\t\tvec3(		0, 1,		0 ),\n\t\t\tvec3( t1.z, 0, t1.w )\n\t\t);\n\t\tvec3 fresnel = ( material.specularColor * t2.x + ( vec3( 1.0 ) - material.specularColor ) * t2.y );\n\t\treflectedLight.directSpecular += lightColor * fresnel * LTC_Evaluate( normal, viewDir, position, mInv, rectCoords );\n\t\treflectedLight.directDiffuse += lightColor * material.diffuseColor * LTC_Evaluate( normal, viewDir, position, mat3( 1.0 ), rectCoords );\n\t}\n#endif\nvoid RE_Direct_Physical( const in IncidentLight directLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\n\tvec3 irradiance = dotNL * directLight.color;\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\t#ifdef CLEARCOAT\n\t\tfloat ccDotNL = saturate( dot( geometry.clearcoatNormal, directLight.direction ) );\n\t\tvec3 ccIrradiance = ccDotNL * directLight.color;\n\t\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\t\tccIrradiance *= PI;\n\t\t#endif\n\t\tfloat clearcoatDHR = material.clearcoat * clearcoatDHRApprox( material.clearcoatRoughness, ccDotNL );\n\t\treflectedLight.directSpecular += ccIrradiance * material.clearcoat * BRDF_Specular_GGX( directLight, geometry.viewDir, geometry.clearcoatNormal, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearcoatRoughness );\n\t#else\n\t\tfloat clearcoatDHR = 0.0;\n\t#endif\n\t#ifdef USE_SHEEN\n\t\treflectedLight.directSpecular += ( 1.0 - clearcoatDHR ) * irradiance * BRDF_Specular_Sheen(\n\t\t\tmaterial.specularRoughness,\n\t\t\tdirectLight.direction,\n\t\t\tgeometry,\n\t\t\tmaterial.sheenColor\n\t\t);\n\t#else\n\t\treflectedLight.directSpecular += ( 1.0 - clearcoatDHR ) * irradiance * BRDF_Specular_GGX( directLight, geometry.viewDir, geometry.normal, material.specularColor, material.specularRoughness);\n\t#endif\n\treflectedLight.directDiffuse += ( 1.0 - clearcoatDHR ) * irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectDiffuse_Physical( const in vec3 irradiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectSpecular_Physical( const in vec3 radiance, const in vec3 irradiance, const in vec3 clearcoatRadiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight) {\n\t#ifdef CLEARCOAT\n\t\tfloat ccDotNV = saturate( dot( geometry.clearcoatNormal, geometry.viewDir ) );\n\t\treflectedLight.indirectSpecular += clearcoatRadiance * material.clearcoat * BRDF_Specular_GGX_Environment( geometry.viewDir, geometry.clearcoatNormal, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearcoatRoughness );\n\t\tfloat ccDotNL = ccDotNV;\n\t\tfloat clearcoatDHR = material.clearcoat * clearcoatDHRApprox( material.clearcoatRoughness, ccDotNL );\n\t#else\n\t\tfloat clearcoatDHR = 0.0;\n\t#endif\n\tfloat clearcoatInv = 1.0 - clearcoatDHR;\n\tvec3 singleScattering = vec3( 0.0 );\n\tvec3 multiScattering = vec3( 0.0 );\n\tvec3 cosineWeightedIrradiance = irradiance * RECIPROCAL_PI;\n\tBRDF_Specular_Multiscattering_Environment( geometry, material.specularColor, material.specularRoughness, singleScattering, multiScattering );\n\tvec3 diffuse = material.diffuseColor * ( 1.0 - ( singleScattering + multiScattering ) );\n\treflectedLight.indirectSpecular += clearcoatInv * radiance * singleScattering;\n\treflectedLight.indirectSpecular += multiScattering * cosineWeightedIrradiance;\n\treflectedLight.indirectDiffuse += diffuse * cosineWeightedIrradiance;\n}\n#define RE_Direct\t\t\t\tRE_Direct_Physical\n#define RE_Direct_RectArea\t\tRE_Direct_RectArea_Physical\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_Physical\n#define RE_IndirectSpecular\t\tRE_IndirectSpecular_Physical\nfloat computeSpecularOcclusion( const in float dotNV, const in float ambientOcclusion, const in float roughness ) {\n\treturn saturate( pow( dotNV + ambientOcclusion, exp2( - 16.0 * roughness - 1.0 ) ) - 1.0 + ambientOcclusion );\n}";

	var lights_fragment_begin = "\nGeometricContext geometry;\ngeometry.position = - vViewPosition;\ngeometry.normal = normal;\ngeometry.viewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( vViewPosition );\n#ifdef CLEARCOAT\n\tgeometry.clearcoatNormal = clearcoatNormal;\n#endif\nIncidentLight directLight;\n#if ( NUM_POINT_LIGHTS > 0 ) && defined( RE_Direct )\n\tPointLight pointLight;\n\t#if defined( USE_SHADOWMAP ) && NUM_POINT_LIGHT_SHADOWS > 0\n\tPointLightShadow pointLightShadow;\n\t#endif\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tpointLight = pointLights[ i ];\n\t\tgetPointDirectLightIrradiance( pointLight, geometry, directLight );\n\t\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_POINT_LIGHT_SHADOWS )\n\t\tpointLightShadow = pointLightShadows[ i ];\n\t\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getPointShadow( pointShadowMap[ i ], pointLightShadow.shadowMapSize, pointLightShadow.shadowBias, pointLightShadow.shadowRadius, vPointShadowCoord[ i ], pointLightShadow.shadowCameraNear, pointLightShadow.shadowCameraFar ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if ( NUM_SPOT_LIGHTS > 0 ) && defined( RE_Direct )\n\tSpotLight spotLight;\n\t#if defined( USE_SHADOWMAP ) && NUM_SPOT_LIGHT_SHADOWS > 0\n\tSpotLightShadow spotLightShadow;\n\t#endif\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tspotLight = spotLights[ i ];\n\t\tgetSpotDirectLightIrradiance( spotLight, geometry, directLight );\n\t\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_SPOT_LIGHT_SHADOWS )\n\t\tspotLightShadow = spotLightShadows[ i ];\n\t\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getShadow( spotShadowMap[ i ], spotLightShadow.shadowMapSize, spotLightShadow.shadowBias, spotLightShadow.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if ( NUM_DIR_LIGHTS > 0 ) && defined( RE_Direct )\n\tDirectionalLight directionalLight;\n\t#if defined( USE_SHADOWMAP ) && NUM_DIR_LIGHT_SHADOWS > 0\n\tDirectionalLightShadow directionalLightShadow;\n\t#endif\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tdirectionalLight = directionalLights[ i ];\n\t\tgetDirectionalDirectLightIrradiance( directionalLight, geometry, directLight );\n\t\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_DIR_LIGHT_SHADOWS )\n\t\tdirectionalLightShadow = directionalLightShadows[ i ];\n\t\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getShadow( directionalShadowMap[ i ], directionalLightShadow.shadowMapSize, directionalLightShadow.shadowBias, directionalLightShadow.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if ( NUM_RECT_AREA_LIGHTS > 0 ) && defined( RE_Direct_RectArea )\n\tRectAreaLight rectAreaLight;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_RECT_AREA_LIGHTS; i ++ ) {\n\t\trectAreaLight = rectAreaLights[ i ];\n\t\tRE_Direct_RectArea( rectAreaLight, geometry, material, reflectedLight );\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if defined( RE_IndirectDiffuse )\n\tvec3 iblIrradiance = vec3( 0.0 );\n\tvec3 irradiance = getAmbientLightIrradiance( ambientLightColor );\n\tirradiance += getLightProbeIrradiance( lightProbe, geometry );\n\t#if ( NUM_HEMI_LIGHTS > 0 )\n\t\t#pragma unroll_loop_start\n\t\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\n\t\t\tirradiance += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\n\t\t}\n\t\t#pragma unroll_loop_end\n\t#endif\n#endif\n#if defined( RE_IndirectSpecular )\n\tvec3 radiance = vec3( 0.0 );\n\tvec3 clearcoatRadiance = vec3( 0.0 );\n#endif";

	var lights_fragment_maps = "#if defined( RE_IndirectDiffuse )\n\t#ifdef USE_LIGHTMAP\n\t\tvec4 lightMapTexel= texture2D( lightMap, vUv2 );\n\t\tvec3 lightMapIrradiance = lightMapTexelToLinear( lightMapTexel ).rgb * lightMapIntensity;\n\t\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\t\tlightMapIrradiance *= PI;\n\t\t#endif\n\t\tirradiance += lightMapIrradiance;\n\t#endif\n\t#if defined( USE_ENVMAP ) && defined( STANDARD ) && defined( ENVMAP_TYPE_CUBE_UV )\n\t\tiblIrradiance += getLightProbeIndirectIrradiance( geometry, maxMipLevel );\n\t#endif\n#endif\n#if defined( USE_ENVMAP ) && defined( RE_IndirectSpecular )\n\tradiance += getLightProbeIndirectRadiance( geometry.viewDir, geometry.normal, material.specularRoughness, maxMipLevel );\n\t#ifdef CLEARCOAT\n\t\tclearcoatRadiance += getLightProbeIndirectRadiance( geometry.viewDir, geometry.clearcoatNormal, material.clearcoatRoughness, maxMipLevel );\n\t#endif\n#endif";

	var lights_fragment_end = "#if defined( RE_IndirectDiffuse )\n\tRE_IndirectDiffuse( irradiance, geometry, material, reflectedLight );\n#endif\n#if defined( RE_IndirectSpecular )\n\tRE_IndirectSpecular( radiance, iblIrradiance, clearcoatRadiance, geometry, material, reflectedLight );\n#endif";

	var logdepthbuf_fragment = "#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\n\tgl_FragDepthEXT = vIsPerspective == 0.0 ? gl_FragCoord.z : log2( vFragDepth ) * logDepthBufFC * 0.5;\n#endif";

	var logdepthbuf_pars_fragment = "#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\n\tuniform float logDepthBufFC;\n\tvarying float vFragDepth;\n\tvarying float vIsPerspective;\n#endif";

	var logdepthbuf_pars_vertex = "#ifdef USE_LOGDEPTHBUF\n\t#ifdef USE_LOGDEPTHBUF_EXT\n\t\tvarying float vFragDepth;\n\t\tvarying float vIsPerspective;\n\t#else\n\t\tuniform float logDepthBufFC;\n\t#endif\n#endif";

	var logdepthbuf_vertex = "#ifdef USE_LOGDEPTHBUF\n\t#ifdef USE_LOGDEPTHBUF_EXT\n\t\tvFragDepth = 1.0 + gl_Position.w;\n\t\tvIsPerspective = float( isPerspectiveMatrix( projectionMatrix ) );\n\t#else\n\t\tif ( isPerspectiveMatrix( projectionMatrix ) ) {\n\t\t\tgl_Position.z = log2( max( EPSILON, gl_Position.w + 1.0 ) ) * logDepthBufFC - 1.0;\n\t\t\tgl_Position.z *= gl_Position.w;\n\t\t}\n\t#endif\n#endif";

	var map_fragment = "#ifdef USE_MAP\n\tvec4 texelColor = texture2D( map, vUv );\n\ttexelColor = mapTexelToLinear( texelColor );\n\tdiffuseColor *= texelColor;\n#endif";

	var map_pars_fragment = "#ifdef USE_MAP\n\tuniform sampler2D map;\n#endif";

	var map_particle_fragment = "#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\n\tvec2 uv = ( uvTransform * vec3( gl_PointCoord.x, 1.0 - gl_PointCoord.y, 1 ) ).xy;\n#endif\n#ifdef USE_MAP\n\tvec4 mapTexel = texture2D( map, uv );\n\tdiffuseColor *= mapTexelToLinear( mapTexel );\n#endif\n#ifdef USE_ALPHAMAP\n\tdiffuseColor.a *= texture2D( alphaMap, uv ).g;\n#endif";

	var map_particle_pars_fragment = "#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\n\tuniform mat3 uvTransform;\n#endif\n#ifdef USE_MAP\n\tuniform sampler2D map;\n#endif\n#ifdef USE_ALPHAMAP\n\tuniform sampler2D alphaMap;\n#endif";

	var metalnessmap_fragment = "float metalnessFactor = metalness;\n#ifdef USE_METALNESSMAP\n\tvec4 texelMetalness = texture2D( metalnessMap, vUv );\n\tmetalnessFactor *= texelMetalness.b;\n#endif";

	var metalnessmap_pars_fragment = "#ifdef USE_METALNESSMAP\n\tuniform sampler2D metalnessMap;\n#endif";

	var morphnormal_vertex = "#ifdef USE_MORPHNORMALS\n\tobjectNormal *= morphTargetBaseInfluence;\n\tobjectNormal += morphNormal0 * morphTargetInfluences[ 0 ];\n\tobjectNormal += morphNormal1 * morphTargetInfluences[ 1 ];\n\tobjectNormal += morphNormal2 * morphTargetInfluences[ 2 ];\n\tobjectNormal += morphNormal3 * morphTargetInfluences[ 3 ];\n#endif";

	var morphtarget_pars_vertex = "#ifdef USE_MORPHTARGETS\n\tuniform float morphTargetBaseInfluence;\n\t#ifndef USE_MORPHNORMALS\n\t\tuniform float morphTargetInfluences[ 8 ];\n\t#else\n\t\tuniform float morphTargetInfluences[ 4 ];\n\t#endif\n#endif";

	var morphtarget_vertex = "#ifdef USE_MORPHTARGETS\n\ttransformed *= morphTargetBaseInfluence;\n\ttransformed += morphTarget0 * morphTargetInfluences[ 0 ];\n\ttransformed += morphTarget1 * morphTargetInfluences[ 1 ];\n\ttransformed += morphTarget2 * morphTargetInfluences[ 2 ];\n\ttransformed += morphTarget3 * morphTargetInfluences[ 3 ];\n\t#ifndef USE_MORPHNORMALS\n\t\ttransformed += morphTarget4 * morphTargetInfluences[ 4 ];\n\t\ttransformed += morphTarget5 * morphTargetInfluences[ 5 ];\n\t\ttransformed += morphTarget6 * morphTargetInfluences[ 6 ];\n\t\ttransformed += morphTarget7 * morphTargetInfluences[ 7 ];\n\t#endif\n#endif";

	var normal_fragment_begin = "#ifdef FLAT_SHADED\n\tvec3 fdx = vec3( dFdx( vViewPosition.x ), dFdx( vViewPosition.y ), dFdx( vViewPosition.z ) );\n\tvec3 fdy = vec3( dFdy( vViewPosition.x ), dFdy( vViewPosition.y ), dFdy( vViewPosition.z ) );\n\tvec3 normal = normalize( cross( fdx, fdy ) );\n#else\n\tvec3 normal = normalize( vNormal );\n\t#ifdef DOUBLE_SIDED\n\t\tnormal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t#endif\n\t#ifdef USE_TANGENT\n\t\tvec3 tangent = normalize( vTangent );\n\t\tvec3 bitangent = normalize( vBitangent );\n\t\t#ifdef DOUBLE_SIDED\n\t\t\ttangent = tangent * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t\t\tbitangent = bitangent * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t\t#endif\n\t\t#if defined( TANGENTSPACE_NORMALMAP ) || defined( USE_CLEARCOAT_NORMALMAP )\n\t\t\tmat3 vTBN = mat3( tangent, bitangent, normal );\n\t\t#endif\n\t#endif\n#endif\nvec3 geometryNormal = normal;";

	var normal_fragment_maps = "#ifdef OBJECTSPACE_NORMALMAP\n\tnormal = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\n\t#ifdef FLIP_SIDED\n\t\tnormal = - normal;\n\t#endif\n\t#ifdef DOUBLE_SIDED\n\t\tnormal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t#endif\n\tnormal = normalize( normalMatrix * normal );\n#elif defined( TANGENTSPACE_NORMALMAP )\n\tvec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\n\tmapN.xy *= normalScale;\n\t#ifdef USE_TANGENT\n\t\tnormal = normalize( vTBN * mapN );\n\t#else\n\t\tnormal = perturbNormal2Arb( -vViewPosition, normal, mapN );\n\t#endif\n#elif defined( USE_BUMPMAP )\n\tnormal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd() );\n#endif";

	var normalmap_pars_fragment = "#ifdef USE_NORMALMAP\n\tuniform sampler2D normalMap;\n\tuniform vec2 normalScale;\n#endif\n#ifdef OBJECTSPACE_NORMALMAP\n\tuniform mat3 normalMatrix;\n#endif\n#if ! defined ( USE_TANGENT ) && ( defined ( TANGENTSPACE_NORMALMAP ) || defined ( USE_CLEARCOAT_NORMALMAP ) )\n\tvec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm, vec3 mapN ) {\n\t\tvec3 q0 = vec3( dFdx( eye_pos.x ), dFdx( eye_pos.y ), dFdx( eye_pos.z ) );\n\t\tvec3 q1 = vec3( dFdy( eye_pos.x ), dFdy( eye_pos.y ), dFdy( eye_pos.z ) );\n\t\tvec2 st0 = dFdx( vUv.st );\n\t\tvec2 st1 = dFdy( vUv.st );\n\t\tfloat scale = sign( st1.t * st0.s - st0.t * st1.s );\n\t\tvec3 S = normalize( ( q0 * st1.t - q1 * st0.t ) * scale );\n\t\tvec3 T = normalize( ( - q0 * st1.s + q1 * st0.s ) * scale );\n\t\tvec3 N = normalize( surf_norm );\n\t\tmat3 tsn = mat3( S, T, N );\n\t\tmapN.xy *= ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t\treturn normalize( tsn * mapN );\n\t}\n#endif";

	var clearcoat_normal_fragment_begin = "#ifdef CLEARCOAT\n\tvec3 clearcoatNormal = geometryNormal;\n#endif";

	var clearcoat_normal_fragment_maps = "#ifdef USE_CLEARCOAT_NORMALMAP\n\tvec3 clearcoatMapN = texture2D( clearcoatNormalMap, vUv ).xyz * 2.0 - 1.0;\n\tclearcoatMapN.xy *= clearcoatNormalScale;\n\t#ifdef USE_TANGENT\n\t\tclearcoatNormal = normalize( vTBN * clearcoatMapN );\n\t#else\n\t\tclearcoatNormal = perturbNormal2Arb( - vViewPosition, clearcoatNormal, clearcoatMapN );\n\t#endif\n#endif";

	var clearcoat_pars_fragment = "#ifdef USE_CLEARCOATMAP\n\tuniform sampler2D clearcoatMap;\n#endif\n#ifdef USE_CLEARCOAT_ROUGHNESSMAP\n\tuniform sampler2D clearcoatRoughnessMap;\n#endif\n#ifdef USE_CLEARCOAT_NORMALMAP\n\tuniform sampler2D clearcoatNormalMap;\n\tuniform vec2 clearcoatNormalScale;\n#endif";

	var packing = "vec3 packNormalToRGB( const in vec3 normal ) {\n\treturn normalize( normal ) * 0.5 + 0.5;\n}\nvec3 unpackRGBToNormal( const in vec3 rgb ) {\n\treturn 2.0 * rgb.xyz - 1.0;\n}\nconst float PackUpscale = 256. / 255.;const float UnpackDownscale = 255. / 256.;\nconst vec3 PackFactors = vec3( 256. * 256. * 256., 256. * 256., 256. );\nconst vec4 UnpackFactors = UnpackDownscale / vec4( PackFactors, 1. );\nconst float ShiftRight8 = 1. / 256.;\nvec4 packDepthToRGBA( const in float v ) {\n\tvec4 r = vec4( fract( v * PackFactors ), v );\n\tr.yzw -= r.xyz * ShiftRight8;\treturn r * PackUpscale;\n}\nfloat unpackRGBAToDepth( const in vec4 v ) {\n\treturn dot( v, UnpackFactors );\n}\nvec4 pack2HalfToRGBA( vec2 v ) {\n\tvec4 r = vec4( v.x, fract( v.x * 255.0 ), v.y, fract( v.y * 255.0 ));\n\treturn vec4( r.x - r.y / 255.0, r.y, r.z - r.w / 255.0, r.w);\n}\nvec2 unpackRGBATo2Half( vec4 v ) {\n\treturn vec2( v.x + ( v.y / 255.0 ), v.z + ( v.w / 255.0 ) );\n}\nfloat viewZToOrthographicDepth( const in float viewZ, const in float near, const in float far ) {\n\treturn ( viewZ + near ) / ( near - far );\n}\nfloat orthographicDepthToViewZ( const in float linearClipZ, const in float near, const in float far ) {\n\treturn linearClipZ * ( near - far ) - near;\n}\nfloat viewZToPerspectiveDepth( const in float viewZ, const in float near, const in float far ) {\n\treturn (( near + viewZ ) * far ) / (( far - near ) * viewZ );\n}\nfloat perspectiveDepthToViewZ( const in float invClipZ, const in float near, const in float far ) {\n\treturn ( near * far ) / ( ( far - near ) * invClipZ - far );\n}";

	var premultiplied_alpha_fragment = "#ifdef PREMULTIPLIED_ALPHA\n\tgl_FragColor.rgb *= gl_FragColor.a;\n#endif";

	var project_vertex = "vec4 mvPosition = vec4( transformed, 1.0 );\n#ifdef USE_INSTANCING\n\tmvPosition = instanceMatrix * mvPosition;\n#endif\nmvPosition = modelViewMatrix * mvPosition;\ngl_Position = projectionMatrix * mvPosition;";

	var dithering_fragment = "#ifdef DITHERING\n\tgl_FragColor.rgb = dithering( gl_FragColor.rgb );\n#endif";

	var dithering_pars_fragment = "#ifdef DITHERING\n\tvec3 dithering( vec3 color ) {\n\t\tfloat grid_position = rand( gl_FragCoord.xy );\n\t\tvec3 dither_shift_RGB = vec3( 0.25 / 255.0, -0.25 / 255.0, 0.25 / 255.0 );\n\t\tdither_shift_RGB = mix( 2.0 * dither_shift_RGB, -2.0 * dither_shift_RGB, grid_position );\n\t\treturn color + dither_shift_RGB;\n\t}\n#endif";

	var roughnessmap_fragment = "float roughnessFactor = roughness;\n#ifdef USE_ROUGHNESSMAP\n\tvec4 texelRoughness = texture2D( roughnessMap, vUv );\n\troughnessFactor *= texelRoughness.g;\n#endif";

	var roughnessmap_pars_fragment = "#ifdef USE_ROUGHNESSMAP\n\tuniform sampler2D roughnessMap;\n#endif";

	var shadowmap_pars_fragment = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHT_SHADOWS > 0\n\t\tuniform sampler2D directionalShadowMap[ NUM_DIR_LIGHT_SHADOWS ];\n\t\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\n\t\tstruct DirectionalLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t};\n\t\tuniform DirectionalLightShadow directionalLightShadows[ NUM_DIR_LIGHT_SHADOWS ];\n\t#endif\n\t#if NUM_SPOT_LIGHT_SHADOWS > 0\n\t\tuniform sampler2D spotShadowMap[ NUM_SPOT_LIGHT_SHADOWS ];\n\t\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHT_SHADOWS ];\n\t\tstruct SpotLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t};\n\t\tuniform SpotLightShadow spotLightShadows[ NUM_SPOT_LIGHT_SHADOWS ];\n\t#endif\n\t#if NUM_POINT_LIGHT_SHADOWS > 0\n\t\tuniform sampler2D pointShadowMap[ NUM_POINT_LIGHT_SHADOWS ];\n\t\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\n\t\tstruct PointLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t\tfloat shadowCameraNear;\n\t\t\tfloat shadowCameraFar;\n\t\t};\n\t\tuniform PointLightShadow pointLightShadows[ NUM_POINT_LIGHT_SHADOWS ];\n\t#endif\n\tfloat texture2DCompare( sampler2D depths, vec2 uv, float compare ) {\n\t\treturn step( compare, unpackRGBAToDepth( texture2D( depths, uv ) ) );\n\t}\n\tvec2 texture2DDistribution( sampler2D shadow, vec2 uv ) {\n\t\treturn unpackRGBATo2Half( texture2D( shadow, uv ) );\n\t}\n\tfloat VSMShadow (sampler2D shadow, vec2 uv, float compare ){\n\t\tfloat occlusion = 1.0;\n\t\tvec2 distribution = texture2DDistribution( shadow, uv );\n\t\tfloat hard_shadow = step( compare , distribution.x );\n\t\tif (hard_shadow != 1.0 ) {\n\t\t\tfloat distance = compare - distribution.x ;\n\t\t\tfloat variance = max( 0.00000, distribution.y * distribution.y );\n\t\t\tfloat softness_probability = variance / (variance + distance * distance );\t\t\tsoftness_probability = clamp( ( softness_probability - 0.3 ) / ( 0.95 - 0.3 ), 0.0, 1.0 );\t\t\tocclusion = clamp( max( hard_shadow, softness_probability ), 0.0, 1.0 );\n\t\t}\n\t\treturn occlusion;\n\t}\n\tfloat getShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord ) {\n\t\tfloat shadow = 1.0;\n\t\tshadowCoord.xyz /= shadowCoord.w;\n\t\tshadowCoord.z += shadowBias;\n\t\tbvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );\n\t\tbool inFrustum = all( inFrustumVec );\n\t\tbvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );\n\t\tbool frustumTest = all( frustumTestVec );\n\t\tif ( frustumTest ) {\n\t\t#if defined( SHADOWMAP_TYPE_PCF )\n\t\t\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n\t\t\tfloat dx0 = - texelSize.x * shadowRadius;\n\t\t\tfloat dy0 = - texelSize.y * shadowRadius;\n\t\t\tfloat dx1 = + texelSize.x * shadowRadius;\n\t\t\tfloat dy1 = + texelSize.y * shadowRadius;\n\t\t\tfloat dx2 = dx0 / 2.0;\n\t\t\tfloat dy2 = dy0 / 2.0;\n\t\t\tfloat dx3 = dx1 / 2.0;\n\t\t\tfloat dy3 = dy1 / 2.0;\n\t\t\tshadow = (\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy2 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy2 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy2 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy3 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy3 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy3 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )\n\t\t\t) * ( 1.0 / 17.0 );\n\t\t#elif defined( SHADOWMAP_TYPE_PCF_SOFT )\n\t\t\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n\t\t\tfloat dx = texelSize.x;\n\t\t\tfloat dy = texelSize.y;\n\t\t\tvec2 uv = shadowCoord.xy;\n\t\t\tvec2 f = fract( uv * shadowMapSize + 0.5 );\n\t\t\tuv -= f * texelSize;\n\t\t\tshadow = (\n\t\t\t\ttexture2DCompare( shadowMap, uv, shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, uv + vec2( dx, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, uv + vec2( 0.0, dy ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, uv + texelSize, shadowCoord.z ) +\n\t\t\t\tmix( texture2DCompare( shadowMap, uv + vec2( -dx, 0.0 ), shadowCoord.z ), \n\t\t\t\t\t texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 0.0 ), shadowCoord.z ),\n\t\t\t\t\t f.x ) +\n\t\t\t\tmix( texture2DCompare( shadowMap, uv + vec2( -dx, dy ), shadowCoord.z ), \n\t\t\t\t\t texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, dy ), shadowCoord.z ),\n\t\t\t\t\t f.x ) +\n\t\t\t\tmix( texture2DCompare( shadowMap, uv + vec2( 0.0, -dy ), shadowCoord.z ), \n\t\t\t\t\t texture2DCompare( shadowMap, uv + vec2( 0.0, 2.0 * dy ), shadowCoord.z ),\n\t\t\t\t\t f.y ) +\n\t\t\t\tmix( texture2DCompare( shadowMap, uv + vec2( dx, -dy ), shadowCoord.z ), \n\t\t\t\t\t texture2DCompare( shadowMap, uv + vec2( dx, 2.0 * dy ), shadowCoord.z ),\n\t\t\t\t\t f.y ) +\n\t\t\t\tmix( mix( texture2DCompare( shadowMap, uv + vec2( -dx, -dy ), shadowCoord.z ), \n\t\t\t\t\t\t	texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, -dy ), shadowCoord.z ),\n\t\t\t\t\t\t	f.x ),\n\t\t\t\t\t mix( texture2DCompare( shadowMap, uv + vec2( -dx, 2.0 * dy ), shadowCoord.z ), \n\t\t\t\t\t\t	texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 2.0 * dy ), shadowCoord.z ),\n\t\t\t\t\t\t	f.x ),\n\t\t\t\t\t f.y )\n\t\t\t) * ( 1.0 / 9.0 );\n\t\t#elif defined( SHADOWMAP_TYPE_VSM )\n\t\t\tshadow = VSMShadow( shadowMap, shadowCoord.xy, shadowCoord.z );\n\t\t#else\n\t\t\tshadow = texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z );\n\t\t#endif\n\t\t}\n\t\treturn shadow;\n\t}\n\tvec2 cubeToUV( vec3 v, float texelSizeY ) {\n\t\tvec3 absV = abs( v );\n\t\tfloat scaleToCube = 1.0 / max( absV.x, max( absV.y, absV.z ) );\n\t\tabsV *= scaleToCube;\n\t\tv *= scaleToCube * ( 1.0 - 2.0 * texelSizeY );\n\t\tvec2 planar = v.xy;\n\t\tfloat almostATexel = 1.5 * texelSizeY;\n\t\tfloat almostOne = 1.0 - almostATexel;\n\t\tif ( absV.z >= almostOne ) {\n\t\t\tif ( v.z > 0.0 )\n\t\t\t\tplanar.x = 4.0 - v.x;\n\t\t} else if ( absV.x >= almostOne ) {\n\t\t\tfloat signX = sign( v.x );\n\t\t\tplanar.x = v.z * signX + 2.0 * signX;\n\t\t} else if ( absV.y >= almostOne ) {\n\t\t\tfloat signY = sign( v.y );\n\t\t\tplanar.x = v.x + 2.0 * signY + 2.0;\n\t\t\tplanar.y = v.z * signY - 2.0;\n\t\t}\n\t\treturn vec2( 0.125, 0.25 ) * planar + vec2( 0.375, 0.75 );\n\t}\n\tfloat getPointShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord, float shadowCameraNear, float shadowCameraFar ) {\n\t\tvec2 texelSize = vec2( 1.0 ) / ( shadowMapSize * vec2( 4.0, 2.0 ) );\n\t\tvec3 lightToPosition = shadowCoord.xyz;\n\t\tfloat dp = ( length( lightToPosition ) - shadowCameraNear ) / ( shadowCameraFar - shadowCameraNear );\t\tdp += shadowBias;\n\t\tvec3 bd3D = normalize( lightToPosition );\n\t\t#if defined( SHADOWMAP_TYPE_PCF ) || defined( SHADOWMAP_TYPE_PCF_SOFT ) || defined( SHADOWMAP_TYPE_VSM )\n\t\t\tvec2 offset = vec2( - 1, 1 ) * shadowRadius * texelSize.y;\n\t\t\treturn (\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxx, texelSize.y ), dp )\n\t\t\t) * ( 1.0 / 9.0 );\n\t\t#else\n\t\t\treturn texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp );\n\t\t#endif\n\t}\n#endif";

	var shadowmap_pars_vertex = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHT_SHADOWS > 0\n\t\tuniform mat4 directionalShadowMatrix[ NUM_DIR_LIGHT_SHADOWS ];\n\t\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\n\t\tstruct DirectionalLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t};\n\t\tuniform DirectionalLightShadow directionalLightShadows[ NUM_DIR_LIGHT_SHADOWS ];\n\t#endif\n\t#if NUM_SPOT_LIGHT_SHADOWS > 0\n\t\tuniform mat4 spotShadowMatrix[ NUM_SPOT_LIGHT_SHADOWS ];\n\t\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHT_SHADOWS ];\n\t\tstruct SpotLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t};\n\t\tuniform SpotLightShadow spotLightShadows[ NUM_SPOT_LIGHT_SHADOWS ];\n\t#endif\n\t#if NUM_POINT_LIGHT_SHADOWS > 0\n\t\tuniform mat4 pointShadowMatrix[ NUM_POINT_LIGHT_SHADOWS ];\n\t\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\n\t\tstruct PointLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t\tfloat shadowCameraNear;\n\t\t\tfloat shadowCameraFar;\n\t\t};\n\t\tuniform PointLightShadow pointLightShadows[ NUM_POINT_LIGHT_SHADOWS ];\n\t#endif\n#endif";

	var shadowmap_vertex = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHT_SHADOWS > 0 || NUM_SPOT_LIGHT_SHADOWS > 0 || NUM_POINT_LIGHT_SHADOWS > 0\n\t\tvec3 shadowWorldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\n\t\tvec4 shadowWorldPosition;\n\t#endif\n\t#if NUM_DIR_LIGHT_SHADOWS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\n\t\tshadowWorldPosition = worldPosition + vec4( shadowWorldNormal * directionalLightShadows[ i ].shadowNormalBias, 0 );\n\t\tvDirectionalShadowCoord[ i ] = directionalShadowMatrix[ i ] * shadowWorldPosition;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#if NUM_SPOT_LIGHT_SHADOWS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_SPOT_LIGHT_SHADOWS; i ++ ) {\n\t\tshadowWorldPosition = worldPosition + vec4( shadowWorldNormal * spotLightShadows[ i ].shadowNormalBias, 0 );\n\t\tvSpotShadowCoord[ i ] = spotShadowMatrix[ i ] * shadowWorldPosition;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#if NUM_POINT_LIGHT_SHADOWS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\n\t\tshadowWorldPosition = worldPosition + vec4( shadowWorldNormal * pointLightShadows[ i ].shadowNormalBias, 0 );\n\t\tvPointShadowCoord[ i ] = pointShadowMatrix[ i ] * shadowWorldPosition;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n#endif";

	var shadowmask_pars_fragment = "float getShadowMask() {\n\tfloat shadow = 1.0;\n\t#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHT_SHADOWS > 0\n\tDirectionalLightShadow directionalLight;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\n\t\tdirectionalLight = directionalLightShadows[ i ];\n\t\tshadow *= receiveShadow ? getShadow( directionalShadowMap[ i ], directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#if NUM_SPOT_LIGHT_SHADOWS > 0\n\tSpotLightShadow spotLight;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_SPOT_LIGHT_SHADOWS; i ++ ) {\n\t\tspotLight = spotLightShadows[ i ];\n\t\tshadow *= receiveShadow ? getShadow( spotShadowMap[ i ], spotLight.shadowMapSize, spotLight.shadowBias, spotLight.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#if NUM_POINT_LIGHT_SHADOWS > 0\n\tPointLightShadow pointLight;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\n\t\tpointLight = pointLightShadows[ i ];\n\t\tshadow *= receiveShadow ? getPointShadow( pointShadowMap[ i ], pointLight.shadowMapSize, pointLight.shadowBias, pointLight.shadowRadius, vPointShadowCoord[ i ], pointLight.shadowCameraNear, pointLight.shadowCameraFar ) : 1.0;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#endif\n\treturn shadow;\n}";

	var skinbase_vertex = "#ifdef USE_SKINNING\n\tmat4 boneMatX = getBoneMatrix( skinIndex.x );\n\tmat4 boneMatY = getBoneMatrix( skinIndex.y );\n\tmat4 boneMatZ = getBoneMatrix( skinIndex.z );\n\tmat4 boneMatW = getBoneMatrix( skinIndex.w );\n#endif";

	var skinning_pars_vertex = "#ifdef USE_SKINNING\n\tuniform mat4 bindMatrix;\n\tuniform mat4 bindMatrixInverse;\n\t#ifdef BONE_TEXTURE\n\t\tuniform highp sampler2D boneTexture;\n\t\tuniform int boneTextureSize;\n\t\tmat4 getBoneMatrix( const in float i ) {\n\t\t\tfloat j = i * 4.0;\n\t\t\tfloat x = mod( j, float( boneTextureSize ) );\n\t\t\tfloat y = floor( j / float( boneTextureSize ) );\n\t\t\tfloat dx = 1.0 / float( boneTextureSize );\n\t\t\tfloat dy = 1.0 / float( boneTextureSize );\n\t\t\ty = dy * ( y + 0.5 );\n\t\t\tvec4 v1 = texture2D( boneTexture, vec2( dx * ( x + 0.5 ), y ) );\n\t\t\tvec4 v2 = texture2D( boneTexture, vec2( dx * ( x + 1.5 ), y ) );\n\t\t\tvec4 v3 = texture2D( boneTexture, vec2( dx * ( x + 2.5 ), y ) );\n\t\t\tvec4 v4 = texture2D( boneTexture, vec2( dx * ( x + 3.5 ), y ) );\n\t\t\tmat4 bone = mat4( v1, v2, v3, v4 );\n\t\t\treturn bone;\n\t\t}\n\t#else\n\t\tuniform mat4 boneMatrices[ MAX_BONES ];\n\t\tmat4 getBoneMatrix( const in float i ) {\n\t\t\tmat4 bone = boneMatrices[ int(i) ];\n\t\t\treturn bone;\n\t\t}\n\t#endif\n#endif";

	var skinning_vertex = "#ifdef USE_SKINNING\n\tvec4 skinVertex = bindMatrix * vec4( transformed, 1.0 );\n\tvec4 skinned = vec4( 0.0 );\n\tskinned += boneMatX * skinVertex * skinWeight.x;\n\tskinned += boneMatY * skinVertex * skinWeight.y;\n\tskinned += boneMatZ * skinVertex * skinWeight.z;\n\tskinned += boneMatW * skinVertex * skinWeight.w;\n\ttransformed = ( bindMatrixInverse * skinned ).xyz;\n#endif";

	var skinnormal_vertex = "#ifdef USE_SKINNING\n\tmat4 skinMatrix = mat4( 0.0 );\n\tskinMatrix += skinWeight.x * boneMatX;\n\tskinMatrix += skinWeight.y * boneMatY;\n\tskinMatrix += skinWeight.z * boneMatZ;\n\tskinMatrix += skinWeight.w * boneMatW;\n\tskinMatrix = bindMatrixInverse * skinMatrix * bindMatrix;\n\tobjectNormal = vec4( skinMatrix * vec4( objectNormal, 0.0 ) ).xyz;\n\t#ifdef USE_TANGENT\n\t\tobjectTangent = vec4( skinMatrix * vec4( objectTangent, 0.0 ) ).xyz;\n\t#endif\n#endif";

	var specularmap_fragment = "float specularStrength;\n#ifdef USE_SPECULARMAP\n\tvec4 texelSpecular = texture2D( specularMap, vUv );\n\tspecularStrength = texelSpecular.r;\n#else\n\tspecularStrength = 1.0;\n#endif";

	var specularmap_pars_fragment = "#ifdef USE_SPECULARMAP\n\tuniform sampler2D specularMap;\n#endif";

	var tonemapping_fragment = "#if defined( TONE_MAPPING )\n\tgl_FragColor.rgb = toneMapping( gl_FragColor.rgb );\n#endif";

	var tonemapping_pars_fragment = "#ifndef saturate\n#define saturate(a) clamp( a, 0.0, 1.0 )\n#endif\nuniform float toneMappingExposure;\nvec3 LinearToneMapping( vec3 color ) {\n\treturn toneMappingExposure * color;\n}\nvec3 ReinhardToneMapping( vec3 color ) {\n\tcolor *= toneMappingExposure;\n\treturn saturate( color / ( vec3( 1.0 ) + color ) );\n}\nvec3 OptimizedCineonToneMapping( vec3 color ) {\n\tcolor *= toneMappingExposure;\n\tcolor = max( vec3( 0.0 ), color - 0.004 );\n\treturn pow( ( color * ( 6.2 * color + 0.5 ) ) / ( color * ( 6.2 * color + 1.7 ) + 0.06 ), vec3( 2.2 ) );\n}\nvec3 RRTAndODTFit( vec3 v ) {\n\tvec3 a = v * ( v + 0.0245786 ) - 0.000090537;\n\tvec3 b = v * ( 0.983729 * v + 0.4329510 ) + 0.238081;\n\treturn a / b;\n}\nvec3 ACESFilmicToneMapping( vec3 color ) {\n\tconst mat3 ACESInputMat = mat3(\n\t\tvec3( 0.59719, 0.07600, 0.02840 ),\t\tvec3( 0.35458, 0.90834, 0.13383 ),\n\t\tvec3( 0.04823, 0.01566, 0.83777 )\n\t);\n\tconst mat3 ACESOutputMat = mat3(\n\t\tvec3(	1.60475, -0.10208, -0.00327 ),\t\tvec3( -0.53108,	1.10813, -0.07276 ),\n\t\tvec3( -0.07367, -0.00605,	1.07602 )\n\t);\n\tcolor *= toneMappingExposure / 0.6;\n\tcolor = ACESInputMat * color;\n\tcolor = RRTAndODTFit( color );\n\tcolor = ACESOutputMat * color;\n\treturn saturate( color );\n}\nvec3 CustomToneMapping( vec3 color ) { return color; }";

	var transmissionmap_fragment = "#ifdef USE_TRANSMISSIONMAP\n\ttotalTransmission *= texture2D( transmissionMap, vUv ).r;\n#endif";

	var transmissionmap_pars_fragment = "#ifdef USE_TRANSMISSIONMAP\n\tuniform sampler2D transmissionMap;\n#endif";

	var uv_pars_fragment = "#if ( defined( USE_UV ) && ! defined( UVS_VERTEX_ONLY ) )\n\tvarying vec2 vUv;\n#endif";

	var uv_pars_vertex = "#ifdef USE_UV\n\t#ifdef UVS_VERTEX_ONLY\n\t\tvec2 vUv;\n\t#else\n\t\tvarying vec2 vUv;\n\t#endif\n\tuniform mat3 uvTransform;\n#endif";

	var uv_vertex = "#ifdef USE_UV\n\tvUv = ( uvTransform * vec3( uv, 1 ) ).xy;\n#endif";

	var uv2_pars_fragment = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tvarying vec2 vUv2;\n#endif";

	var uv2_pars_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tattribute vec2 uv2;\n\tvarying vec2 vUv2;\n\tuniform mat3 uv2Transform;\n#endif";

	var uv2_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tvUv2 = ( uv2Transform * vec3( uv2, 1 ) ).xy;\n#endif";

	var worldpos_vertex = "#if defined( USE_ENVMAP ) || defined( DISTANCE ) || defined ( USE_SHADOWMAP )\n\tvec4 worldPosition = vec4( transformed, 1.0 );\n\t#ifdef USE_INSTANCING\n\t\tworldPosition = instanceMatrix * worldPosition;\n\t#endif\n\tworldPosition = modelMatrix * worldPosition;\n#endif";

	var background_frag = "uniform sampler2D t2D;\nvarying vec2 vUv;\nvoid main() {\n\tvec4 texColor = texture2D( t2D, vUv );\n\tgl_FragColor = mapTexelToLinear( texColor );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n}";

	var background_vert = "varying vec2 vUv;\nuniform mat3 uvTransform;\nvoid main() {\n\tvUv = ( uvTransform * vec3( uv, 1 ) ).xy;\n\tgl_Position = vec4( position.xy, 1.0, 1.0 );\n}";

	var cube_frag = "#include <envmap_common_pars_fragment>\nuniform float opacity;\nvarying vec3 vWorldDirection;\n#include <cube_uv_reflection_fragment>\nvoid main() {\n\tvec3 vReflect = vWorldDirection;\n\t#include <envmap_fragment>\n\tgl_FragColor = envColor;\n\tgl_FragColor.a *= opacity;\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n}";

	var cube_vert = "varying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n\tvWorldDirection = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n\tgl_Position.z = gl_Position.w;\n}";

	var depth_frag = "#if DEPTH_PACKING == 3200\n\tuniform float opacity;\n#endif\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvarying vec2 vHighPrecisionZW;\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( 1.0 );\n\t#if DEPTH_PACKING == 3200\n\t\tdiffuseColor.a = opacity;\n\t#endif\n\t#include <map_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <logdepthbuf_fragment>\n\tfloat fragCoordZ = 0.5 * vHighPrecisionZW[0] / vHighPrecisionZW[1] + 0.5;\n\t#if DEPTH_PACKING == 3200\n\t\tgl_FragColor = vec4( vec3( 1.0 - fragCoordZ ), opacity );\n\t#elif DEPTH_PACKING == 3201\n\t\tgl_FragColor = packDepthToRGBA( fragCoordZ );\n\t#endif\n}";

	var depth_vert = "#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvarying vec2 vHighPrecisionZW;\nvoid main() {\n\t#include <uv_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_DISPLACEMENTMAP\n\t\t#include <beginnormal_vertex>\n\t\t#include <morphnormal_vertex>\n\t\t#include <skinnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvHighPrecisionZW = gl_Position.zw;\n}";

	var distanceRGBA_frag = "#define DISTANCE\nuniform vec3 referencePosition;\nuniform float nearDistance;\nuniform float farDistance;\nvarying vec3 vWorldPosition;\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main () {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( 1.0 );\n\t#include <map_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\tfloat dist = length( vWorldPosition - referencePosition );\n\tdist = ( dist - nearDistance ) / ( farDistance - nearDistance );\n\tdist = saturate( dist );\n\tgl_FragColor = packDepthToRGBA( dist );\n}";

	var distanceRGBA_vert = "#define DISTANCE\nvarying vec3 vWorldPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_DISPLACEMENTMAP\n\t\t#include <beginnormal_vertex>\n\t\t#include <morphnormal_vertex>\n\t\t#include <skinnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <clipping_planes_vertex>\n\tvWorldPosition = worldPosition.xyz;\n}";

	var equirect_frag = "uniform sampler2D tEquirect;\nvarying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n\tvec3 direction = normalize( vWorldDirection );\n\tvec2 sampleUV = equirectUv( direction );\n\tvec4 texColor = texture2D( tEquirect, sampleUV );\n\tgl_FragColor = mapTexelToLinear( texColor );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n}";

	var equirect_vert = "varying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n\tvWorldDirection = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n}";

	var linedashed_frag = "uniform vec3 diffuse;\nuniform float opacity;\nuniform float dashSize;\nuniform float totalSize;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tif ( mod( vLineDistance, totalSize ) > dashSize ) {\n\t\tdiscard;\n\t}\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <color_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n}";

	var linedashed_vert = "uniform float scale;\nattribute float lineDistance;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\tvLineDistance = scale * lineDistance;\n\t#include <color_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <fog_vertex>\n}";

	var meshbasic_frag = "uniform vec3 diffuse;\nuniform float opacity;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <cube_uv_reflection_fragment>\n#include <fog_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\t#ifdef USE_LIGHTMAP\n\t\n\t\tvec4 lightMapTexel= texture2D( lightMap, vUv2 );\n\t\treflectedLight.indirectDiffuse += lightMapTexelToLinear( lightMapTexel ).rgb * lightMapIntensity;\n\t#else\n\t\treflectedLight.indirectDiffuse += vec3( 1.0 );\n\t#endif\n\t#include <aomap_fragment>\n\treflectedLight.indirectDiffuse *= diffuseColor.rgb;\n\tvec3 outgoingLight = reflectedLight.indirectDiffuse;\n\t#include <envmap_fragment>\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

	var meshbasic_vert = "#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_ENVMAP\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <worldpos_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <envmap_vertex>\n\t#include <fog_vertex>\n}";

	var meshlambert_frag = "uniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float opacity;\nvarying vec3 vLightFront;\nvarying vec3 vIndirectFront;\n#ifdef DOUBLE_SIDED\n\tvarying vec3 vLightBack;\n\tvarying vec3 vIndirectBack;\n#endif\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <cube_uv_reflection_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <fog_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\t#include <emissivemap_fragment>\n\t#ifdef DOUBLE_SIDED\n\t\treflectedLight.indirectDiffuse += ( gl_FrontFacing ) ? vIndirectFront : vIndirectBack;\n\t#else\n\t\treflectedLight.indirectDiffuse += vIndirectFront;\n\t#endif\n\t#include <lightmap_fragment>\n\treflectedLight.indirectDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb );\n\t#ifdef DOUBLE_SIDED\n\t\treflectedLight.directDiffuse = ( gl_FrontFacing ) ? vLightFront : vLightBack;\n\t#else\n\t\treflectedLight.directDiffuse = vLightFront;\n\t#endif\n\treflectedLight.directDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb ) * getShadowMask();\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\n\t#include <envmap_fragment>\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

	var meshlambert_vert = "#define LAMBERT\nvarying vec3 vLightFront;\nvarying vec3 vIndirectFront;\n#ifdef DOUBLE_SIDED\n\tvarying vec3 vLightBack;\n\tvarying vec3 vIndirectBack;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <envmap_pars_vertex>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <worldpos_vertex>\n\t#include <envmap_vertex>\n\t#include <lights_lambert_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";

	var meshmatcap_frag = "#define MATCAP\nuniform vec3 diffuse;\nuniform float opacity;\nuniform sampler2D matcap;\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <fog_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\tvec3 viewDir = normalize( vViewPosition );\n\tvec3 x = normalize( vec3( viewDir.z, 0.0, - viewDir.x ) );\n\tvec3 y = cross( viewDir, x );\n\tvec2 uv = vec2( dot( x, normal ), dot( y, normal ) ) * 0.495 + 0.5;\n\t#ifdef USE_MATCAP\n\t\tvec4 matcapColor = texture2D( matcap, uv );\n\t\tmatcapColor = matcapTexelToLinear( matcapColor );\n\t#else\n\t\tvec4 matcapColor = vec4( 1.0 );\n\t#endif\n\tvec3 outgoingLight = diffuseColor.rgb * matcapColor.rgb;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

	var meshmatcap_vert = "#define MATCAP\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <color_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#ifndef FLAT_SHADED\n\t\tvNormal = normalize( transformedNormal );\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <fog_vertex>\n\tvViewPosition = - mvPosition.xyz;\n}";

	var meshtoon_frag = "#define TOON\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <gradientmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <lights_toon_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\t#include <emissivemap_fragment>\n\t#include <lights_toon_fragment>\n\t#include <lights_fragment_begin>\n\t#include <lights_fragment_maps>\n\t#include <lights_fragment_end>\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

	var meshtoon_vert = "#define TOON\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvViewPosition = - mvPosition.xyz;\n\t#include <worldpos_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";

	var meshphong_frag = "#define PHONG\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform vec3 specular;\nuniform float shininess;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <cube_uv_reflection_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <lights_phong_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\t#include <emissivemap_fragment>\n\t#include <lights_phong_fragment>\n\t#include <lights_fragment_begin>\n\t#include <lights_fragment_maps>\n\t#include <lights_fragment_end>\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\n\t#include <envmap_fragment>\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

	var meshphong_vert = "#define PHONG\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvViewPosition = - mvPosition.xyz;\n\t#include <worldpos_vertex>\n\t#include <envmap_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";

	var meshphysical_frag = "#define STANDARD\n#ifdef PHYSICAL\n\t#define REFLECTIVITY\n\t#define CLEARCOAT\n\t#define TRANSMISSION\n#endif\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float roughness;\nuniform float metalness;\nuniform float opacity;\n#ifdef TRANSMISSION\n\tuniform float transmission;\n#endif\n#ifdef REFLECTIVITY\n\tuniform float reflectivity;\n#endif\n#ifdef CLEARCOAT\n\tuniform float clearcoat;\n\tuniform float clearcoatRoughness;\n#endif\n#ifdef USE_SHEEN\n\tuniform vec3 sheen;\n#endif\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n\t#ifdef USE_TANGENT\n\t\tvarying vec3 vTangent;\n\t\tvarying vec3 vBitangent;\n\t#endif\n#endif\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <transmissionmap_pars_fragment>\n#include <bsdfs>\n#include <cube_uv_reflection_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_physical_pars_fragment>\n#include <fog_pars_fragment>\n#include <lights_pars_begin>\n#include <lights_physical_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <clearcoat_pars_fragment>\n#include <roughnessmap_pars_fragment>\n#include <metalnessmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#ifdef TRANSMISSION\n\t\tfloat totalTransmission = transmission;\n\t#endif\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <roughnessmap_fragment>\n\t#include <metalnessmap_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\t#include <clearcoat_normal_fragment_begin>\n\t#include <clearcoat_normal_fragment_maps>\n\t#include <emissivemap_fragment>\n\t#include <transmissionmap_fragment>\n\t#include <lights_physical_fragment>\n\t#include <lights_fragment_begin>\n\t#include <lights_fragment_maps>\n\t#include <lights_fragment_end>\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\n\t#ifdef TRANSMISSION\n\t\tdiffuseColor.a *= mix( saturate( 1. - totalTransmission + linearToRelativeLuminance( reflectedLight.directSpecular + reflectedLight.indirectSpecular ) ), 1.0, metalness );\n\t#endif\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

	var meshphysical_vert = "#define STANDARD\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n\t#ifdef USE_TANGENT\n\t\tvarying vec3 vTangent;\n\t\tvarying vec3 vBitangent;\n\t#endif\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n\t#ifdef USE_TANGENT\n\t\tvTangent = normalize( transformedTangent );\n\t\tvBitangent = normalize( cross( vNormal, vTangent ) * tangent.w );\n\t#endif\n#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvViewPosition = - mvPosition.xyz;\n\t#include <worldpos_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";

	var normal_frag = "#define NORMAL\nuniform float opacity;\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\n\tvarying vec3 vViewPosition;\n#endif\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n\t#ifdef USE_TANGENT\n\t\tvarying vec3 vTangent;\n\t\tvarying vec3 vBitangent;\n\t#endif\n#endif\n#include <packing>\n#include <uv_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\t#include <logdepthbuf_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\tgl_FragColor = vec4( packNormalToRGB( normal ), opacity );\n}";

	var normal_vert = "#define NORMAL\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\n\tvarying vec3 vViewPosition;\n#endif\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n\t#ifdef USE_TANGENT\n\t\tvarying vec3 vTangent;\n\t\tvarying vec3 vBitangent;\n\t#endif\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n\t#ifdef USE_TANGENT\n\t\tvTangent = normalize( transformedTangent );\n\t\tvBitangent = normalize( cross( vNormal, vTangent ) * tangent.w );\n\t#endif\n#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\n\tvViewPosition = - mvPosition.xyz;\n#endif\n}";

	var points_frag = "uniform vec3 diffuse;\nuniform float opacity;\n#include <common>\n#include <color_pars_fragment>\n#include <map_particle_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_particle_fragment>\n\t#include <color_fragment>\n\t#include <alphatest_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n}";

	var points_vert = "uniform float size;\nuniform float scale;\n#include <common>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <color_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <project_vertex>\n\tgl_PointSize = size;\n\t#ifdef USE_SIZEATTENUATION\n\t\tbool isPerspective = isPerspectiveMatrix( projectionMatrix );\n\t\tif ( isPerspective ) gl_PointSize *= ( scale / - mvPosition.z );\n\t#endif\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <worldpos_vertex>\n\t#include <fog_vertex>\n}";

	var shadow_frag = "uniform vec3 color;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\nvoid main() {\n\tgl_FragColor = vec4( color, opacity * ( 1.0 - getShadowMask() ) );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}";

	var shadow_vert = "#include <common>\n#include <fog_pars_vertex>\n#include <shadowmap_pars_vertex>\nvoid main() {\n\t#include <begin_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";

	var sprite_frag = "uniform vec3 diffuse;\nuniform float opacity;\n#include <common>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}";

	var sprite_vert = "uniform float rotation;\nuniform vec2 center;\n#include <common>\n#include <uv_pars_vertex>\n#include <fog_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\tvec4 mvPosition = modelViewMatrix * vec4( 0.0, 0.0, 0.0, 1.0 );\n\tvec2 scale;\n\tscale.x = length( vec3( modelMatrix[ 0 ].x, modelMatrix[ 0 ].y, modelMatrix[ 0 ].z ) );\n\tscale.y = length( vec3( modelMatrix[ 1 ].x, modelMatrix[ 1 ].y, modelMatrix[ 1 ].z ) );\n\t#ifndef USE_SIZEATTENUATION\n\t\tbool isPerspective = isPerspectiveMatrix( projectionMatrix );\n\t\tif ( isPerspective ) scale *= - mvPosition.z;\n\t#endif\n\tvec2 alignedPosition = ( position.xy - ( center - vec2( 0.5 ) ) ) * scale;\n\tvec2 rotatedPosition;\n\trotatedPosition.x = cos( rotation ) * alignedPosition.x - sin( rotation ) * alignedPosition.y;\n\trotatedPosition.y = sin( rotation ) * alignedPosition.x + cos( rotation ) * alignedPosition.y;\n\tmvPosition.xy += rotatedPosition;\n\tgl_Position = projectionMatrix * mvPosition;\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <fog_vertex>\n}";

	var ShaderChunk = {
		alphamap_fragment: alphamap_fragment,
		alphamap_pars_fragment: alphamap_pars_fragment,
		alphatest_fragment: alphatest_fragment,
		aomap_fragment: aomap_fragment,
		aomap_pars_fragment: aomap_pars_fragment,
		begin_vertex: begin_vertex,
		beginnormal_vertex: beginnormal_vertex,
		bsdfs: bsdfs,
		bumpmap_pars_fragment: bumpmap_pars_fragment,
		clipping_planes_fragment: clipping_planes_fragment,
		clipping_planes_pars_fragment: clipping_planes_pars_fragment,
		clipping_planes_pars_vertex: clipping_planes_pars_vertex,
		clipping_planes_vertex: clipping_planes_vertex,
		color_fragment: color_fragment,
		color_pars_fragment: color_pars_fragment,
		color_pars_vertex: color_pars_vertex,
		color_vertex: color_vertex,
		common: common,
		cube_uv_reflection_fragment: cube_uv_reflection_fragment,
		defaultnormal_vertex: defaultnormal_vertex,
		displacementmap_pars_vertex: displacementmap_pars_vertex,
		displacementmap_vertex: displacementmap_vertex,
		emissivemap_fragment: emissivemap_fragment,
		emissivemap_pars_fragment: emissivemap_pars_fragment,
		encodings_fragment: encodings_fragment,
		encodings_pars_fragment: encodings_pars_fragment,
		envmap_fragment: envmap_fragment,
		envmap_common_pars_fragment: envmap_common_pars_fragment,
		envmap_pars_fragment: envmap_pars_fragment,
		envmap_pars_vertex: envmap_pars_vertex,
		envmap_physical_pars_fragment: envmap_physical_pars_fragment,
		envmap_vertex: envmap_vertex,
		fog_vertex: fog_vertex,
		fog_pars_vertex: fog_pars_vertex,
		fog_fragment: fog_fragment,
		fog_pars_fragment: fog_pars_fragment,
		gradientmap_pars_fragment: gradientmap_pars_fragment,
		lightmap_fragment: lightmap_fragment,
		lightmap_pars_fragment: lightmap_pars_fragment,
		lights_lambert_vertex: lights_lambert_vertex,
		lights_pars_begin: lights_pars_begin,
		lights_toon_fragment: lights_toon_fragment,
		lights_toon_pars_fragment: lights_toon_pars_fragment,
		lights_phong_fragment: lights_phong_fragment,
		lights_phong_pars_fragment: lights_phong_pars_fragment,
		lights_physical_fragment: lights_physical_fragment,
		lights_physical_pars_fragment: lights_physical_pars_fragment,
		lights_fragment_begin: lights_fragment_begin,
		lights_fragment_maps: lights_fragment_maps,
		lights_fragment_end: lights_fragment_end,
		logdepthbuf_fragment: logdepthbuf_fragment,
		logdepthbuf_pars_fragment: logdepthbuf_pars_fragment,
		logdepthbuf_pars_vertex: logdepthbuf_pars_vertex,
		logdepthbuf_vertex: logdepthbuf_vertex,
		map_fragment: map_fragment,
		map_pars_fragment: map_pars_fragment,
		map_particle_fragment: map_particle_fragment,
		map_particle_pars_fragment: map_particle_pars_fragment,
		metalnessmap_fragment: metalnessmap_fragment,
		metalnessmap_pars_fragment: metalnessmap_pars_fragment,
		morphnormal_vertex: morphnormal_vertex,
		morphtarget_pars_vertex: morphtarget_pars_vertex,
		morphtarget_vertex: morphtarget_vertex,
		normal_fragment_begin: normal_fragment_begin,
		normal_fragment_maps: normal_fragment_maps,
		normalmap_pars_fragment: normalmap_pars_fragment,
		clearcoat_normal_fragment_begin: clearcoat_normal_fragment_begin,
		clearcoat_normal_fragment_maps: clearcoat_normal_fragment_maps,
		clearcoat_pars_fragment: clearcoat_pars_fragment,
		packing: packing,
		premultiplied_alpha_fragment: premultiplied_alpha_fragment,
		project_vertex: project_vertex,
		dithering_fragment: dithering_fragment,
		dithering_pars_fragment: dithering_pars_fragment,
		roughnessmap_fragment: roughnessmap_fragment,
		roughnessmap_pars_fragment: roughnessmap_pars_fragment,
		shadowmap_pars_fragment: shadowmap_pars_fragment,
		shadowmap_pars_vertex: shadowmap_pars_vertex,
		shadowmap_vertex: shadowmap_vertex,
		shadowmask_pars_fragment: shadowmask_pars_fragment,
		skinbase_vertex: skinbase_vertex,
		skinning_pars_vertex: skinning_pars_vertex,
		skinning_vertex: skinning_vertex,
		skinnormal_vertex: skinnormal_vertex,
		specularmap_fragment: specularmap_fragment,
		specularmap_pars_fragment: specularmap_pars_fragment,
		tonemapping_fragment: tonemapping_fragment,
		tonemapping_pars_fragment: tonemapping_pars_fragment,
		transmissionmap_fragment: transmissionmap_fragment,
		transmissionmap_pars_fragment: transmissionmap_pars_fragment,
		uv_pars_fragment: uv_pars_fragment,
		uv_pars_vertex: uv_pars_vertex,
		uv_vertex: uv_vertex,
		uv2_pars_fragment: uv2_pars_fragment,
		uv2_pars_vertex: uv2_pars_vertex,
		uv2_vertex: uv2_vertex,
		worldpos_vertex: worldpos_vertex,
		background_frag: background_frag,
		background_vert: background_vert,
		cube_frag: cube_frag,
		cube_vert: cube_vert,
		depth_frag: depth_frag,
		depth_vert: depth_vert,
		distanceRGBA_frag: distanceRGBA_frag,
		distanceRGBA_vert: distanceRGBA_vert,
		equirect_frag: equirect_frag,
		equirect_vert: equirect_vert,
		linedashed_frag: linedashed_frag,
		linedashed_vert: linedashed_vert,
		meshbasic_frag: meshbasic_frag,
		meshbasic_vert: meshbasic_vert,
		meshlambert_frag: meshlambert_frag,
		meshlambert_vert: meshlambert_vert,
		meshmatcap_frag: meshmatcap_frag,
		meshmatcap_vert: meshmatcap_vert,
		meshtoon_frag: meshtoon_frag,
		meshtoon_vert: meshtoon_vert,
		meshphong_frag: meshphong_frag,
		meshphong_vert: meshphong_vert,
		meshphysical_frag: meshphysical_frag,
		meshphysical_vert: meshphysical_vert,
		normal_frag: normal_frag,
		normal_vert: normal_vert,
		points_frag: points_frag,
		points_vert: points_vert,
		shadow_frag: shadow_frag,
		shadow_vert: shadow_vert,
		sprite_frag: sprite_frag,
		sprite_vert: sprite_vert
	};

	/**
	 * Uniforms library for shared webgl shaders
	 */

	var UniformsLib = {
		common: {
			diffuse: {
				value: new Color(0xeeeeee)
			},
			opacity: {
				value: 1.0
			},
			map: {
				value: null
			},
			uvTransform: {
				value: new Matrix3()
			},
			uv2Transform: {
				value: new Matrix3()
			},
			alphaMap: {
				value: null
			}
		},
		specularmap: {
			specularMap: {
				value: null
			}
		},
		envmap: {
			envMap: {
				value: null
			},
			flipEnvMap: {
				value: -1
			},
			reflectivity: {
				value: 1.0
			},
			refractionRatio: {
				value: 0.98
			},
			maxMipLevel: {
				value: 0
			}
		},
		aomap: {
			aoMap: {
				value: null
			},
			aoMapIntensity: {
				value: 1
			}
		},
		lightmap: {
			lightMap: {
				value: null
			},
			lightMapIntensity: {
				value: 1
			}
		},
		emissivemap: {
			emissiveMap: {
				value: null
			}
		},
		bumpmap: {
			bumpMap: {
				value: null
			},
			bumpScale: {
				value: 1
			}
		},
		normalmap: {
			normalMap: {
				value: null
			},
			normalScale: {
				value: new Vector2(1, 1)
			}
		},
		displacementmap: {
			displacementMap: {
				value: null
			},
			displacementScale: {
				value: 1
			},
			displacementBias: {
				value: 0
			}
		},
		roughnessmap: {
			roughnessMap: {
				value: null
			}
		},
		metalnessmap: {
			metalnessMap: {
				value: null
			}
		},
		gradientmap: {
			gradientMap: {
				value: null
			}
		},
		fog: {
			fogDensity: {
				value: 0.00025
			},
			fogNear: {
				value: 1
			},
			fogFar: {
				value: 2000
			},
			fogColor: {
				value: new Color(0xffffff)
			}
		},
		lights: {
			ambientLightColor: {
				value: []
			},
			lightProbe: {
				value: []
			},
			directionalLights: {
				value: [],
				properties: {
					direction: {},
					color: {}
				}
			},
			directionalLightShadows: {
				value: [],
				properties: {
					shadowBias: {},
					shadowNormalBias: {},
					shadowRadius: {},
					shadowMapSize: {}
				}
			},
			directionalShadowMap: {
				value: []
			},
			directionalShadowMatrix: {
				value: []
			},
			spotLights: {
				value: [],
				properties: {
					color: {},
					position: {},
					direction: {},
					distance: {},
					coneCos: {},
					penumbraCos: {},
					decay: {}
				}
			},
			spotLightShadows: {
				value: [],
				properties: {
					shadowBias: {},
					shadowNormalBias: {},
					shadowRadius: {},
					shadowMapSize: {}
				}
			},
			spotShadowMap: {
				value: []
			},
			spotShadowMatrix: {
				value: []
			},
			pointLights: {
				value: [],
				properties: {
					color: {},
					position: {},
					decay: {},
					distance: {}
				}
			},
			pointLightShadows: {
				value: [],
				properties: {
					shadowBias: {},
					shadowNormalBias: {},
					shadowRadius: {},
					shadowMapSize: {},
					shadowCameraNear: {},
					shadowCameraFar: {}
				}
			},
			pointShadowMap: {
				value: []
			},
			pointShadowMatrix: {
				value: []
			},
			hemisphereLights: {
				value: [],
				properties: {
					direction: {},
					skyColor: {},
					groundColor: {}
				}
			},
			// TODO (abelnation): RectAreaLight BRDF data needs to be moved from example to main src
			rectAreaLights: {
				value: [],
				properties: {
					color: {},
					position: {},
					width: {},
					height: {}
				}
			},
			ltc_1: {
				value: null
			},
			ltc_2: {
				value: null
			}
		},
		points: {
			diffuse: {
				value: new Color(0xeeeeee)
			},
			opacity: {
				value: 1.0
			},
			size: {
				value: 1.0
			},
			scale: {
				value: 1.0
			},
			map: {
				value: null
			},
			alphaMap: {
				value: null
			},
			uvTransform: {
				value: new Matrix3()
			}
		},
		sprite: {
			diffuse: {
				value: new Color(0xeeeeee)
			},
			opacity: {
				value: 1.0
			},
			center: {
				value: new Vector2(0.5, 0.5)
			},
			rotation: {
				value: 0.0
			},
			map: {
				value: null
			},
			alphaMap: {
				value: null
			},
			uvTransform: {
				value: new Matrix3()
			}
		}
	};

	var ShaderLib = {
		basic: {
			uniforms: mergeUniforms([UniformsLib.common, UniformsLib.specularmap, UniformsLib.envmap, UniformsLib.aomap, UniformsLib.lightmap, UniformsLib.fog]),
			vertexShader: ShaderChunk.meshbasic_vert,
			fragmentShader: ShaderChunk.meshbasic_frag
		},
		lambert: {
			uniforms: mergeUniforms([UniformsLib.common, UniformsLib.specularmap, UniformsLib.envmap, UniformsLib.aomap, UniformsLib.lightmap, UniformsLib.emissivemap, UniformsLib.fog, UniformsLib.lights, {
				emissive: {
					value: new Color(0x000000)
				}
			}]),
			vertexShader: ShaderChunk.meshlambert_vert,
			fragmentShader: ShaderChunk.meshlambert_frag
		},
		phong: {
			uniforms: mergeUniforms([UniformsLib.common, UniformsLib.specularmap, UniformsLib.envmap, UniformsLib.aomap, UniformsLib.lightmap, UniformsLib.emissivemap, UniformsLib.bumpmap, UniformsLib.normalmap, UniformsLib.displacementmap, UniformsLib.fog, UniformsLib.lights, {
				emissive: {
					value: new Color(0x000000)
				},
				specular: {
					value: new Color(0x111111)
				},
				shininess: {
					value: 30
				}
			}]),
			vertexShader: ShaderChunk.meshphong_vert,
			fragmentShader: ShaderChunk.meshphong_frag
		},
		standard: {
			uniforms: mergeUniforms([UniformsLib.common, UniformsLib.envmap, UniformsLib.aomap, UniformsLib.lightmap, UniformsLib.emissivemap, UniformsLib.bumpmap, UniformsLib.normalmap, UniformsLib.displacementmap, UniformsLib.roughnessmap, UniformsLib.metalnessmap, UniformsLib.fog, UniformsLib.lights, {
				emissive: {
					value: new Color(0x000000)
				},
				roughness: {
					value: 1.0
				},
				metalness: {
					value: 0.0
				},
				envMapIntensity: {
					value: 1
				} // temporary

			}]),
			vertexShader: ShaderChunk.meshphysical_vert,
			fragmentShader: ShaderChunk.meshphysical_frag
		},
		toon: {
			uniforms: mergeUniforms([UniformsLib.common, UniformsLib.aomap, UniformsLib.lightmap, UniformsLib.emissivemap, UniformsLib.bumpmap, UniformsLib.normalmap, UniformsLib.displacementmap, UniformsLib.gradientmap, UniformsLib.fog, UniformsLib.lights, {
				emissive: {
					value: new Color(0x000000)
				}
			}]),
			vertexShader: ShaderChunk.meshtoon_vert,
			fragmentShader: ShaderChunk.meshtoon_frag
		},
		matcap: {
			uniforms: mergeUniforms([UniformsLib.common, UniformsLib.bumpmap, UniformsLib.normalmap, UniformsLib.displacementmap, UniformsLib.fog, {
				matcap: {
					value: null
				}
			}]),
			vertexShader: ShaderChunk.meshmatcap_vert,
			fragmentShader: ShaderChunk.meshmatcap_frag
		},
		points: {
			uniforms: mergeUniforms([UniformsLib.points, UniformsLib.fog]),
			vertexShader: ShaderChunk.points_vert,
			fragmentShader: ShaderChunk.points_frag
		},
		dashed: {
			uniforms: mergeUniforms([UniformsLib.common, UniformsLib.fog, {
				scale: {
					value: 1
				},
				dashSize: {
					value: 1
				},
				totalSize: {
					value: 2
				}
			}]),
			vertexShader: ShaderChunk.linedashed_vert,
			fragmentShader: ShaderChunk.linedashed_frag
		},
		depth: {
			uniforms: mergeUniforms([UniformsLib.common, UniformsLib.displacementmap]),
			vertexShader: ShaderChunk.depth_vert,
			fragmentShader: ShaderChunk.depth_frag
		},
		normal: {
			uniforms: mergeUniforms([UniformsLib.common, UniformsLib.bumpmap, UniformsLib.normalmap, UniformsLib.displacementmap, {
				opacity: {
					value: 1.0
				}
			}]),
			vertexShader: ShaderChunk.normal_vert,
			fragmentShader: ShaderChunk.normal_frag
		},
		sprite: {
			uniforms: mergeUniforms([UniformsLib.sprite, UniformsLib.fog]),
			vertexShader: ShaderChunk.sprite_vert,
			fragmentShader: ShaderChunk.sprite_frag
		},
		background: {
			uniforms: {
				uvTransform: {
					value: new Matrix3()
				},
				t2D: {
					value: null
				}
			},
			vertexShader: ShaderChunk.background_vert,
			fragmentShader: ShaderChunk.background_frag
		},

		/* -------------------------------------------------------------------------
		//	Cube map shader
		 ------------------------------------------------------------------------- */
		cube: {
			uniforms: mergeUniforms([UniformsLib.envmap, {
				opacity: {
					value: 1.0
				}
			}]),
			vertexShader: ShaderChunk.cube_vert,
			fragmentShader: ShaderChunk.cube_frag
		},
		equirect: {
			uniforms: {
				tEquirect: {
					value: null
				}
			},
			vertexShader: ShaderChunk.equirect_vert,
			fragmentShader: ShaderChunk.equirect_frag
		},
		distanceRGBA: {
			uniforms: mergeUniforms([UniformsLib.common, UniformsLib.displacementmap, {
				referencePosition: {
					value: new Vector3()
				},
				nearDistance: {
					value: 1
				},
				farDistance: {
					value: 1000
				}
			}]),
			vertexShader: ShaderChunk.distanceRGBA_vert,
			fragmentShader: ShaderChunk.distanceRGBA_frag
		},
		shadow: {
			uniforms: mergeUniforms([UniformsLib.lights, UniformsLib.fog, {
				color: {
					value: new Color(0x00000)
				},
				opacity: {
					value: 1.0
				}
			}]),
			vertexShader: ShaderChunk.shadow_vert,
			fragmentShader: ShaderChunk.shadow_frag
		}
	};
	ShaderLib.physical = {
		uniforms: mergeUniforms([ShaderLib.standard.uniforms, {
			clearcoat: {
				value: 0
			},
			clearcoatMap: {
				value: null
			},
			clearcoatRoughness: {
				value: 0
			},
			clearcoatRoughnessMap: {
				value: null
			},
			clearcoatNormalScale: {
				value: new Vector2(1, 1)
			},
			clearcoatNormalMap: {
				value: null
			},
			sheen: {
				value: new Color(0x000000)
			},
			transmission: {
				value: 0
			},
			transmissionMap: {
				value: null
			}
		}]),
		vertexShader: ShaderChunk.meshphysical_vert,
		fragmentShader: ShaderChunk.meshphysical_frag
	};

	function WebGLBackground(renderer, cubemaps, state, objects, premultipliedAlpha) {
		var clearColor = new Color(0x000000);
		var clearAlpha = 0;
		var planeMesh;
		var boxMesh;
		var currentBackground = null;
		var currentBackgroundVersion = 0;
		var currentTonemapping = null;

		function render(renderList, scene, camera, forceClear) {
			var background = scene.isScene === true ? scene.background : null;

			if (background && background.isTexture) {
				background = cubemaps.get(background);
			} // Ignore background in AR
			// TODO: Reconsider this.


			var xr = renderer.xr;
			var session = xr.getSession && xr.getSession();

			if (session && session.environmentBlendMode === 'additive') {
				background = null;
			}

			if (background === null) {
				setClear(clearColor, clearAlpha);
			} else if (background && background.isColor) {
				setClear(background, 1);
				forceClear = true;
			}

			if (renderer.autoClear || forceClear) {
				renderer.clear(renderer.autoClearColor, renderer.autoClearDepth, renderer.autoClearStencil);
			}

			if (background && (background.isCubeTexture || background.isWebGLCubeRenderTarget || background.mapping === CubeUVReflectionMapping)) {
				if (boxMesh === undefined) {
					boxMesh = new Mesh(new BoxGeometry(1, 1, 1), new ShaderMaterial({
						name: 'BackgroundCubeMaterial',
						uniforms: cloneUniforms(ShaderLib.cube.uniforms),
						vertexShader: ShaderLib.cube.vertexShader,
						fragmentShader: ShaderLib.cube.fragmentShader,
						side: BackSide,
						depthTest: false,
						depthWrite: false,
						fog: false
					}));
					boxMesh.geometry.deleteAttribute('normal');
					boxMesh.geometry.deleteAttribute('uv');

					boxMesh.onBeforeRender = function (renderer, scene, camera) {
						this.matrixWorld.copyPosition(camera.matrixWorld);
					}; // enable code injection for non-built-in material


					Object.defineProperty(boxMesh.material, 'envMap', {
						get: function get() {
							return this.uniforms.envMap.value;
						}
					});
					objects.update(boxMesh);
				}

				if (background.isWebGLCubeRenderTarget) {
					// TODO Deprecate
					background = background.texture;
				}

				boxMesh.material.uniforms.envMap.value = background;
				boxMesh.material.uniforms.flipEnvMap.value = background.isCubeTexture && background._needsFlipEnvMap ? -1 : 1;

				if (currentBackground !== background || currentBackgroundVersion !== background.version || currentTonemapping !== renderer.toneMapping) {
					boxMesh.material.needsUpdate = true;
					currentBackground = background;
					currentBackgroundVersion = background.version;
					currentTonemapping = renderer.toneMapping;
				} // push to the pre-sorted opaque render list


				renderList.unshift(boxMesh, boxMesh.geometry, boxMesh.material, 0, 0, null);
			} else if (background && background.isTexture) {
				if (planeMesh === undefined) {
					planeMesh = new Mesh(new PlaneGeometry(2, 2), new ShaderMaterial({
						name: 'BackgroundMaterial',
						uniforms: cloneUniforms(ShaderLib.background.uniforms),
						vertexShader: ShaderLib.background.vertexShader,
						fragmentShader: ShaderLib.background.fragmentShader,
						side: FrontSide,
						depthTest: false,
						depthWrite: false,
						fog: false
					}));
					planeMesh.geometry.deleteAttribute('normal'); // enable code injection for non-built-in material

					Object.defineProperty(planeMesh.material, 'map', {
						get: function get() {
							return this.uniforms.t2D.value;
						}
					});
					objects.update(planeMesh);
				}

				planeMesh.material.uniforms.t2D.value = background;

				if (background.matrixAutoUpdate === true) {
					background.updateMatrix();
				}

				planeMesh.material.uniforms.uvTransform.value.copy(background.matrix);

				if (currentBackground !== background || currentBackgroundVersion !== background.version || currentTonemapping !== renderer.toneMapping) {
					planeMesh.material.needsUpdate = true;
					currentBackground = background;
					currentBackgroundVersion = background.version;
					currentTonemapping = renderer.toneMapping;
				} // push to the pre-sorted opaque render list


				renderList.unshift(planeMesh, planeMesh.geometry, planeMesh.material, 0, 0, null);
			}
		}

		function setClear(color, alpha) {
			state.buffers.color.setClear(color.r, color.g, color.b, alpha, premultipliedAlpha);
		}

		return {
			getClearColor: function getClearColor() {
				return clearColor;
			},
			setClearColor: function setClearColor(color, alpha) {
				if (alpha === void 0) {
					alpha = 1;
				}

				clearColor.set(color);
				clearAlpha = alpha;
				setClear(clearColor, clearAlpha);
			},
			getClearAlpha: function getClearAlpha() {
				return clearAlpha;
			},
			setClearAlpha: function setClearAlpha(alpha) {
				clearAlpha = alpha;
				setClear(clearColor, clearAlpha);
			},
			render: render
		};
	}

	function WebGLBindingStates(gl, extensions, attributes, capabilities) {
		var maxVertexAttributes = gl.getParameter(34921);
		var extension = capabilities.isWebGL2 ? null : extensions.get('OES_vertex_array_object');
		var vaoAvailable = capabilities.isWebGL2 || extension !== null;
		var bindingStates = {};
		var defaultState = createBindingState(null);
		var currentState = defaultState;

		function setup(object, material, program, geometry, index) {
			var updateBuffers = false;

			if (vaoAvailable) {
				var state = getBindingState(geometry, program, material);

				if (currentState !== state) {
					currentState = state;
					bindVertexArrayObject(currentState.object);
				}

				updateBuffers = needsUpdate(geometry, index);
				if (updateBuffers) saveCache(geometry, index);
			} else {
				var wireframe = material.wireframe === true;

				if (currentState.geometry !== geometry.id || currentState.program !== program.id || currentState.wireframe !== wireframe) {
					currentState.geometry = geometry.id;
					currentState.program = program.id;
					currentState.wireframe = wireframe;
					updateBuffers = true;
				}
			}

			if (object.isInstancedMesh === true) {
				updateBuffers = true;
			}

			if (index !== null) {
				attributes.update(index, 34963);
			}

			if (updateBuffers) {
				setupVertexAttributes(object, material, program, geometry);

				if (index !== null) {
					gl.bindBuffer(34963, attributes.get(index).buffer);
				}
			}
		}

		function createVertexArrayObject() {
			if (capabilities.isWebGL2) return gl.createVertexArray();
			return extension.createVertexArrayOES();
		}

		function bindVertexArrayObject(vao) {
			if (capabilities.isWebGL2) return gl.bindVertexArray(vao);
			return extension.bindVertexArrayOES(vao);
		}

		function deleteVertexArrayObject(vao) {
			if (capabilities.isWebGL2) return gl.deleteVertexArray(vao);
			return extension.deleteVertexArrayOES(vao);
		}

		function getBindingState(geometry, program, material) {
			var wireframe = material.wireframe === true;
			var programMap = bindingStates[geometry.id];

			if (programMap === undefined) {
				programMap = {};
				bindingStates[geometry.id] = programMap;
			}

			var stateMap = programMap[program.id];

			if (stateMap === undefined) {
				stateMap = {};
				programMap[program.id] = stateMap;
			}

			var state = stateMap[wireframe];

			if (state === undefined) {
				state = createBindingState(createVertexArrayObject());
				stateMap[wireframe] = state;
			}

			return state;
		}

		function createBindingState(vao) {
			var newAttributes = [];
			var enabledAttributes = [];
			var attributeDivisors = [];

			for (var i = 0; i < maxVertexAttributes; i++) {
				newAttributes[i] = 0;
				enabledAttributes[i] = 0;
				attributeDivisors[i] = 0;
			}

			return {
				// for backward compatibility on non-VAO support browser
				geometry: null,
				program: null,
				wireframe: false,
				newAttributes: newAttributes,
				enabledAttributes: enabledAttributes,
				attributeDivisors: attributeDivisors,
				object: vao,
				attributes: {},
				index: null
			};
		}

		function needsUpdate(geometry, index) {
			var cachedAttributes = currentState.attributes;
			var geometryAttributes = geometry.attributes;
			var attributesNum = 0;

			for (var key in geometryAttributes) {
				var cachedAttribute = cachedAttributes[key];
				var geometryAttribute = geometryAttributes[key];
				if (cachedAttribute === undefined) return true;
				if (cachedAttribute.attribute !== geometryAttribute) return true;
				if (cachedAttribute.data !== geometryAttribute.data) return true;
				attributesNum++;
			}

			if (currentState.attributesNum !== attributesNum) return true;
			if (currentState.index !== index) return true;
			return false;
		}

		function saveCache(geometry, index) {
			var cache = {};
			var attributes = geometry.attributes;
			var attributesNum = 0;

			for (var key in attributes) {
				var attribute = attributes[key];
				var data = {};
				data.attribute = attribute;

				if (attribute.data) {
					data.data = attribute.data;
				}

				cache[key] = data;
				attributesNum++;
			}

			currentState.attributes = cache;
			currentState.attributesNum = attributesNum;
			currentState.index = index;
		}

		function initAttributes() {
			var newAttributes = currentState.newAttributes;

			for (var i = 0, il = newAttributes.length; i < il; i++) {
				newAttributes[i] = 0;
			}
		}

		function enableAttribute(attribute) {
			enableAttributeAndDivisor(attribute, 0);
		}

		function enableAttributeAndDivisor(attribute, meshPerAttribute) {
			var newAttributes = currentState.newAttributes;
			var enabledAttributes = currentState.enabledAttributes;
			var attributeDivisors = currentState.attributeDivisors;
			newAttributes[attribute] = 1;

			if (enabledAttributes[attribute] === 0) {
				gl.enableVertexAttribArray(attribute);
				enabledAttributes[attribute] = 1;
			}

			if (attributeDivisors[attribute] !== meshPerAttribute) {
				var _extension = capabilities.isWebGL2 ? gl : extensions.get('ANGLE_instanced_arrays');

				_extension[capabilities.isWebGL2 ? 'vertexAttribDivisor' : 'vertexAttribDivisorANGLE'](attribute, meshPerAttribute);

				attributeDivisors[attribute] = meshPerAttribute;
			}
		}

		function disableUnusedAttributes() {
			var newAttributes = currentState.newAttributes;
			var enabledAttributes = currentState.enabledAttributes;

			for (var i = 0, il = enabledAttributes.length; i < il; i++) {
				if (enabledAttributes[i] !== newAttributes[i]) {
					gl.disableVertexAttribArray(i);
					enabledAttributes[i] = 0;
				}
			}
		}

		function vertexAttribPointer(index, size, type, normalized, stride, offset) {
			if (capabilities.isWebGL2 === true && (type === 5124 || type === 5125)) {
				gl.vertexAttribIPointer(index, size, type, stride, offset);
			} else {
				gl.vertexAttribPointer(index, size, type, normalized, stride, offset);
			}
		}

		function setupVertexAttributes(object, material, program, geometry) {
			if (capabilities.isWebGL2 === false && (object.isInstancedMesh || geometry.isInstancedBufferGeometry)) {
				if (extensions.get('ANGLE_instanced_arrays') === null) return;
			}

			initAttributes();
			var geometryAttributes = geometry.attributes;
			var programAttributes = program.getAttributes();
			var materialDefaultAttributeValues = material.defaultAttributeValues;

			for (var name in programAttributes) {
				var programAttribute = programAttributes[name];

				if (programAttribute >= 0) {
					var geometryAttribute = geometryAttributes[name];

					if (geometryAttribute !== undefined) {
						var normalized = geometryAttribute.normalized;
						var size = geometryAttribute.itemSize;
						var attribute = attributes.get(geometryAttribute); // TODO Attribute may not be available on context restore

						if (attribute === undefined) continue;
						var buffer = attribute.buffer;
						var type = attribute.type;
						var bytesPerElement = attribute.bytesPerElement;

						if (geometryAttribute.isInterleavedBufferAttribute) {
							var data = geometryAttribute.data;
							var stride = data.stride;
							var offset = geometryAttribute.offset;

							if (data && data.isInstancedInterleavedBuffer) {
								enableAttributeAndDivisor(programAttribute, data.meshPerAttribute);

								if (geometry._maxInstanceCount === undefined) {
									geometry._maxInstanceCount = data.meshPerAttribute * data.count;
								}
							} else {
								enableAttribute(programAttribute);
							}

							gl.bindBuffer(34962, buffer);
							vertexAttribPointer(programAttribute, size, type, normalized, stride * bytesPerElement, offset * bytesPerElement);
						} else {
							if (geometryAttribute.isInstancedBufferAttribute) {
								enableAttributeAndDivisor(programAttribute, geometryAttribute.meshPerAttribute);

								if (geometry._maxInstanceCount === undefined) {
									geometry._maxInstanceCount = geometryAttribute.meshPerAttribute * geometryAttribute.count;
								}
							} else {
								enableAttribute(programAttribute);
							}

							gl.bindBuffer(34962, buffer);
							vertexAttribPointer(programAttribute, size, type, normalized, 0, 0);
						}
					} else if (name === 'instanceMatrix') {
						var _attribute = attributes.get(object.instanceMatrix); // TODO Attribute may not be available on context restore


						if (_attribute === undefined) continue;
						var _buffer = _attribute.buffer;
						var _type = _attribute.type;
						enableAttributeAndDivisor(programAttribute + 0, 1);
						enableAttributeAndDivisor(programAttribute + 1, 1);
						enableAttributeAndDivisor(programAttribute + 2, 1);
						enableAttributeAndDivisor(programAttribute + 3, 1);
						gl.bindBuffer(34962, _buffer);
						gl.vertexAttribPointer(programAttribute + 0, 4, _type, false, 64, 0);
						gl.vertexAttribPointer(programAttribute + 1, 4, _type, false, 64, 16);
						gl.vertexAttribPointer(programAttribute + 2, 4, _type, false, 64, 32);
						gl.vertexAttribPointer(programAttribute + 3, 4, _type, false, 64, 48);
					} else if (name === 'instanceColor') {
						var _attribute2 = attributes.get(object.instanceColor); // TODO Attribute may not be available on context restore


						if (_attribute2 === undefined) continue;
						var _buffer2 = _attribute2.buffer;
						var _type2 = _attribute2.type;
						enableAttributeAndDivisor(programAttribute, 1);
						gl.bindBuffer(34962, _buffer2);
						gl.vertexAttribPointer(programAttribute, 3, _type2, false, 12, 0);
					} else if (materialDefaultAttributeValues !== undefined) {
						var value = materialDefaultAttributeValues[name];

						if (value !== undefined) {
							switch (value.length) {
								case 2:
									gl.vertexAttrib2fv(programAttribute, value);
									break;

								case 3:
									gl.vertexAttrib3fv(programAttribute, value);
									break;

								case 4:
									gl.vertexAttrib4fv(programAttribute, value);
									break;

								default:
									gl.vertexAttrib1fv(programAttribute, value);
							}
						}
					}
				}
			}

			disableUnusedAttributes();
		}

		function dispose() {
			reset();

			for (var geometryId in bindingStates) {
				var programMap = bindingStates[geometryId];

				for (var programId in programMap) {
					var stateMap = programMap[programId];

					for (var wireframe in stateMap) {
						deleteVertexArrayObject(stateMap[wireframe].object);
						delete stateMap[wireframe];
					}

					delete programMap[programId];
				}

				delete bindingStates[geometryId];
			}
		}

		function releaseStatesOfGeometry(geometry) {
			if (bindingStates[geometry.id] === undefined) return;
			var programMap = bindingStates[geometry.id];

			for (var programId in programMap) {
				var stateMap = programMap[programId];

				for (var wireframe in stateMap) {
					deleteVertexArrayObject(stateMap[wireframe].object);
					delete stateMap[wireframe];
				}

				delete programMap[programId];
			}

			delete bindingStates[geometry.id];
		}

		function releaseStatesOfProgram(program) {
			for (var geometryId in bindingStates) {
				var programMap = bindingStates[geometryId];
				if (programMap[program.id] === undefined) continue;
				var stateMap = programMap[program.id];

				for (var wireframe in stateMap) {
					deleteVertexArrayObject(stateMap[wireframe].object);
					delete stateMap[wireframe];
				}

				delete programMap[program.id];
			}
		}

		function reset() {
			resetDefaultState();
			if (currentState === defaultState) return;
			currentState = defaultState;
			bindVertexArrayObject(currentState.object);
		} // for backward-compatilibity


		function resetDefaultState() {
			defaultState.geometry = null;
			defaultState.program = null;
			defaultState.wireframe = false;
		}

		return {
			setup: setup,
			reset: reset,
			resetDefaultState: resetDefaultState,
			dispose: dispose,
			releaseStatesOfGeometry: releaseStatesOfGeometry,
			releaseStatesOfProgram: releaseStatesOfProgram,
			initAttributes: initAttributes,
			enableAttribute: enableAttribute,
			disableUnusedAttributes: disableUnusedAttributes
		};
	}

	function WebGLBufferRenderer(gl, extensions, info, capabilities) {
		var isWebGL2 = capabilities.isWebGL2;
		var mode;

		function setMode(value) {
			mode = value;
		}

		function render(start, count) {
			gl.drawArrays(mode, start, count);
			info.update(count, mode, 1);
		}

		function renderInstances(start, count, primcount) {
			if (primcount === 0) return;
			var extension, methodName;

			if (isWebGL2) {
				extension = gl;
				methodName = 'drawArraysInstanced';
			} else {
				extension = extensions.get('ANGLE_instanced_arrays');
				methodName = 'drawArraysInstancedANGLE';

				if (extension === null) {
					console.error('THREE.WebGLBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.');
					return;
				}
			}

			extension[methodName](mode, start, count, primcount);
			info.update(count, mode, primcount);
		} //


		this.setMode = setMode;
		this.render = render;
		this.renderInstances = renderInstances;
	}

	function WebGLCapabilities(gl, extensions, parameters) {
		var maxAnisotropy;

		function getMaxAnisotropy() {
			if (maxAnisotropy !== undefined) return maxAnisotropy;
			var extension = extensions.get('EXT_texture_filter_anisotropic');

			if (extension !== null) {
				maxAnisotropy = gl.getParameter(extension.MAX_TEXTURE_MAX_ANISOTROPY_EXT);
			} else {
				maxAnisotropy = 0;
			}

			return maxAnisotropy;
		}

		function getMaxPrecision(precision) {
			if (precision === 'highp') {
				if (gl.getShaderPrecisionFormat(35633, 36338).precision > 0 && gl.getShaderPrecisionFormat(35632, 36338).precision > 0) {
					return 'highp';
				}

				precision = 'mediump';
			}

			if (precision === 'mediump') {
				if (gl.getShaderPrecisionFormat(35633, 36337).precision > 0 && gl.getShaderPrecisionFormat(35632, 36337).precision > 0) {
					return 'mediump';
				}
			}

			return 'lowp';
		}
		/* eslint-disable no-undef */


		var isWebGL2 = typeof WebGL2RenderingContext !== 'undefined' && gl instanceof WebGL2RenderingContext || typeof WebGL2ComputeRenderingContext !== 'undefined' && gl instanceof WebGL2ComputeRenderingContext;
		/* eslint-enable no-undef */

		var precision = parameters.precision !== undefined ? parameters.precision : 'highp';
		var maxPrecision = getMaxPrecision(precision);

		if (maxPrecision !== precision) {
			console.warn('THREE.WebGLRenderer:', precision, 'not supported, using', maxPrecision, 'instead.');
			precision = maxPrecision;
		}

		var logarithmicDepthBuffer = parameters.logarithmicDepthBuffer === true;
		var maxTextures = gl.getParameter(34930);
		var maxVertexTextures = gl.getParameter(35660);
		var maxTextureSize = gl.getParameter(3379);
		var maxCubemapSize = gl.getParameter(34076);
		var maxAttributes = gl.getParameter(34921);
		var maxVertexUniforms = gl.getParameter(36347);
		var maxVaryings = gl.getParameter(36348);
		var maxFragmentUniforms = gl.getParameter(36349);
		var vertexTextures = maxVertexTextures > 0;
		var floatFragmentTextures = isWebGL2 || !!extensions.get('OES_texture_float');
		var floatVertexTextures = vertexTextures && floatFragmentTextures;
		var maxSamples = isWebGL2 ? gl.getParameter(36183) : 0;
		return {
			isWebGL2: isWebGL2,
			getMaxAnisotropy: getMaxAnisotropy,
			getMaxPrecision: getMaxPrecision,
			precision: precision,
			logarithmicDepthBuffer: logarithmicDepthBuffer,
			maxTextures: maxTextures,
			maxVertexTextures: maxVertexTextures,
			maxTextureSize: maxTextureSize,
			maxCubemapSize: maxCubemapSize,
			maxAttributes: maxAttributes,
			maxVertexUniforms: maxVertexUniforms,
			maxVaryings: maxVaryings,
			maxFragmentUniforms: maxFragmentUniforms,
			vertexTextures: vertexTextures,
			floatFragmentTextures: floatFragmentTextures,
			floatVertexTextures: floatVertexTextures,
			maxSamples: maxSamples
		};
	}

	function WebGLClipping(properties) {
		var scope = this;
		var globalState = null,
				numGlobalPlanes = 0,
				localClippingEnabled = false,
				renderingShadows = false;
		var plane = new Plane(),
				viewNormalMatrix = new Matrix3(),
				uniform = {
			value: null,
			needsUpdate: false
		};
		this.uniform = uniform;
		this.numPlanes = 0;
		this.numIntersection = 0;

		this.init = function (planes, enableLocalClipping, camera) {
			var enabled = planes.length !== 0 || enableLocalClipping || // enable state of previous frame - the clipping code has to
			// run another frame in order to reset the state:
			numGlobalPlanes !== 0 || localClippingEnabled;
			localClippingEnabled = enableLocalClipping;
			globalState = projectPlanes(planes, camera, 0);
			numGlobalPlanes = planes.length;
			return enabled;
		};

		this.beginShadows = function () {
			renderingShadows = true;
			projectPlanes(null);
		};

		this.endShadows = function () {
			renderingShadows = false;
			resetGlobalState();
		};

		this.setState = function (material, camera, useCache) {
			var planes = material.clippingPlanes,
					clipIntersection = material.clipIntersection,
					clipShadows = material.clipShadows;
			var materialProperties = properties.get(material);

			if (!localClippingEnabled || planes === null || planes.length === 0 || renderingShadows && !clipShadows) {
				// there's no local clipping
				if (renderingShadows) {
					// there's no global clipping
					projectPlanes(null);
				} else {
					resetGlobalState();
				}
			} else {
				var nGlobal = renderingShadows ? 0 : numGlobalPlanes,
						lGlobal = nGlobal * 4;
				var dstArray = materialProperties.clippingState || null;
				uniform.value = dstArray; // ensure unique state

				dstArray = projectPlanes(planes, camera, lGlobal, useCache);

				for (var i = 0; i !== lGlobal; ++i) {
					dstArray[i] = globalState[i];
				}

				materialProperties.clippingState = dstArray;
				this.numIntersection = clipIntersection ? this.numPlanes : 0;
				this.numPlanes += nGlobal;
			}
		};

		function resetGlobalState() {
			if (uniform.value !== globalState) {
				uniform.value = globalState;
				uniform.needsUpdate = numGlobalPlanes > 0;
			}

			scope.numPlanes = numGlobalPlanes;
			scope.numIntersection = 0;
		}

		function projectPlanes(planes, camera, dstOffset, skipTransform) {
			var nPlanes = planes !== null ? planes.length : 0;
			var dstArray = null;

			if (nPlanes !== 0) {
				dstArray = uniform.value;

				if (skipTransform !== true || dstArray === null) {
					var flatSize = dstOffset + nPlanes * 4,
							viewMatrix = camera.matrixWorldInverse;
					viewNormalMatrix.getNormalMatrix(viewMatrix);

					if (dstArray === null || dstArray.length < flatSize) {
						dstArray = new Float32Array(flatSize);
					}

					for (var i = 0, i4 = dstOffset; i !== nPlanes; ++i, i4 += 4) {
						plane.copy(planes[i]).applyMatrix4(viewMatrix, viewNormalMatrix);
						plane.normal.toArray(dstArray, i4);
						dstArray[i4 + 3] = plane.constant;
					}
				}

				uniform.value = dstArray;
				uniform.needsUpdate = true;
			}

			scope.numPlanes = nPlanes;
			scope.numIntersection = 0;
			return dstArray;
		}
	}

	function WebGLCubeMaps(renderer) {
		var cubemaps = new WeakMap();

		function mapTextureMapping(texture, mapping) {
			if (mapping === EquirectangularReflectionMapping) {
				texture.mapping = CubeReflectionMapping;
			} else if (mapping === EquirectangularRefractionMapping) {
				texture.mapping = CubeRefractionMapping;
			}

			return texture;
		}

		function get(texture) {
			if (texture && texture.isTexture) {
				var mapping = texture.mapping;

				if (mapping === EquirectangularReflectionMapping || mapping === EquirectangularRefractionMapping) {
					if (cubemaps.has(texture)) {
						var cubemap = cubemaps.get(texture).texture;
						return mapTextureMapping(cubemap, texture.mapping);
					} else {
						var image = texture.image;

						if (image && image.height > 0) {
							var currentRenderList = renderer.getRenderList();
							var currentRenderTarget = renderer.getRenderTarget();
							var renderTarget = new WebGLCubeRenderTarget(image.height / 2);
							renderTarget.fromEquirectangularTexture(renderer, texture);
							cubemaps.set(texture, renderTarget);
							renderer.setRenderTarget(currentRenderTarget);
							renderer.setRenderList(currentRenderList);
							texture.addEventListener('dispose', onTextureDispose);
							return mapTextureMapping(renderTarget.texture, texture.mapping);
						} else {
							// image not yet ready. try the conversion next frame
							return null;
						}
					}
				}
			}

			return texture;
		}

		function onTextureDispose(event) {
			var texture = event.target;
			texture.removeEventListener('dispose', onTextureDispose);
			var cubemap = cubemaps.get(texture);

			if (cubemap !== undefined) {
				cubemaps.delete(texture);
				cubemap.dispose();
			}
		}

		function dispose() {
			cubemaps = new WeakMap();
		}

		return {
			get: get,
			dispose: dispose
		};
	}

	function WebGLExtensions(gl) {
		var extensions = {};

		function getExtension(name) {
			if (extensions[name] !== undefined) {
				return extensions[name];
			}

			var extension;

			switch (name) {
				case 'WEBGL_depth_texture':
					extension = gl.getExtension('WEBGL_depth_texture') || gl.getExtension('MOZ_WEBGL_depth_texture') || gl.getExtension('WEBKIT_WEBGL_depth_texture');
					break;

				case 'EXT_texture_filter_anisotropic':
					extension = gl.getExtension('EXT_texture_filter_anisotropic') || gl.getExtension('MOZ_EXT_texture_filter_anisotropic') || gl.getExtension('WEBKIT_EXT_texture_filter_anisotropic');
					break;

				case 'WEBGL_compressed_texture_s3tc':
					extension = gl.getExtension('WEBGL_compressed_texture_s3tc') || gl.getExtension('MOZ_WEBGL_compressed_texture_s3tc') || gl.getExtension('WEBKIT_WEBGL_compressed_texture_s3tc');
					break;

				case 'WEBGL_compressed_texture_pvrtc':
					extension = gl.getExtension('WEBGL_compressed_texture_pvrtc') || gl.getExtension('WEBKIT_WEBGL_compressed_texture_pvrtc');
					break;

				default:
					extension = gl.getExtension(name);
			}

			extensions[name] = extension;
			return extension;
		}

		return {
			has: function has(name) {
				return getExtension(name) !== null;
			},
			init: function init(capabilities) {
				if (capabilities.isWebGL2) {
					getExtension('EXT_color_buffer_float');
				} else {
					getExtension('WEBGL_depth_texture');
					getExtension('OES_texture_float');
					getExtension('OES_texture_half_float');
					getExtension('OES_texture_half_float_linear');
					getExtension('OES_standard_derivatives');
					getExtension('OES_element_index_uint');
					getExtension('OES_vertex_array_object');
					getExtension('ANGLE_instanced_arrays');
				}

				getExtension('OES_texture_float_linear');
				getExtension('EXT_color_buffer_half_float');
			},
			get: function get(name) {
				var extension = getExtension(name);

				if (extension === null) {
					console.warn('THREE.WebGLRenderer: ' + name + ' extension not supported.');
				}

				return extension;
			}
		};
	}

	function WebGLGeometries(gl, attributes, info, bindingStates) {
		var geometries = {};
		var wireframeAttributes = new WeakMap();

		function onGeometryDispose(event) {
			var geometry = event.target;

			if (geometry.index !== null) {
				attributes.remove(geometry.index);
			}

			for (var name in geometry.attributes) {
				attributes.remove(geometry.attributes[name]);
			}

			geometry.removeEventListener('dispose', onGeometryDispose);
			delete geometries[geometry.id];
			var attribute = wireframeAttributes.get(geometry);

			if (attribute) {
				attributes.remove(attribute);
				wireframeAttributes.delete(geometry);
			}

			bindingStates.releaseStatesOfGeometry(geometry);

			if (geometry.isInstancedBufferGeometry === true) {
				delete geometry._maxInstanceCount;
			} //


			info.memory.geometries--;
		}

		function get(object, geometry) {
			if (geometries[geometry.id] === true) return geometry;
			geometry.addEventListener('dispose', onGeometryDispose);
			geometries[geometry.id] = true;
			info.memory.geometries++;
			return geometry;
		}

		function update(geometry) {
			var geometryAttributes = geometry.attributes; // Updating index buffer in VAO now. See WebGLBindingStates.

			for (var name in geometryAttributes) {
				attributes.update(geometryAttributes[name], 34962);
			} // morph targets


			var morphAttributes = geometry.morphAttributes;

			for (var _name in morphAttributes) {
				var array = morphAttributes[_name];

				for (var i = 0, l = array.length; i < l; i++) {
					attributes.update(array[i], 34962);
				}
			}
		}

		function updateWireframeAttribute(geometry) {
			var indices = [];
			var geometryIndex = geometry.index;
			var geometryPosition = geometry.attributes.position;
			var version = 0;

			if (geometryIndex !== null) {
				var array = geometryIndex.array;
				version = geometryIndex.version;

				for (var i = 0, l = array.length; i < l; i += 3) {
					var a = array[i + 0];
					var b = array[i + 1];
					var c = array[i + 2];
					indices.push(a, b, b, c, c, a);
				}
			} else {
				var _array = geometryPosition.array;
				version = geometryPosition.version;

				for (var _i = 0, _l = _array.length / 3 - 1; _i < _l; _i += 3) {
					var _a = _i + 0;

					var _b = _i + 1;

					var _c = _i + 2;

					indices.push(_a, _b, _b, _c, _c, _a);
				}
			}

			var attribute = new (arrayMax(indices) > 65535 ? Uint32BufferAttribute : Uint16BufferAttribute)(indices, 1);
			attribute.version = version; // Updating index buffer in VAO now. See WebGLBindingStates
			//

			var previousAttribute = wireframeAttributes.get(geometry);
			if (previousAttribute) attributes.remove(previousAttribute); //

			wireframeAttributes.set(geometry, attribute);
		}

		function getWireframeAttribute(geometry) {
			var currentAttribute = wireframeAttributes.get(geometry);

			if (currentAttribute) {
				var geometryIndex = geometry.index;

				if (geometryIndex !== null) {
					// if the attribute is obsolete, create a new one
					if (currentAttribute.version < geometryIndex.version) {
						updateWireframeAttribute(geometry);
					}
				}
			} else {
				updateWireframeAttribute(geometry);
			}

			return wireframeAttributes.get(geometry);
		}

		return {
			get: get,
			update: update,
			getWireframeAttribute: getWireframeAttribute
		};
	}

	function WebGLIndexedBufferRenderer(gl, extensions, info, capabilities) {
		var isWebGL2 = capabilities.isWebGL2;
		var mode;

		function setMode(value) {
			mode = value;
		}

		var type, bytesPerElement;

		function setIndex(value) {
			type = value.type;
			bytesPerElement = value.bytesPerElement;
		}

		function render(start, count) {
			gl.drawElements(mode, count, type, start * bytesPerElement);
			info.update(count, mode, 1);
		}

		function renderInstances(start, count, primcount) {
			if (primcount === 0) return;
			var extension, methodName;

			if (isWebGL2) {
				extension = gl;
				methodName = 'drawElementsInstanced';
			} else {
				extension = extensions.get('ANGLE_instanced_arrays');
				methodName = 'drawElementsInstancedANGLE';

				if (extension === null) {
					console.error('THREE.WebGLIndexedBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.');
					return;
				}
			}

			extension[methodName](mode, count, type, start * bytesPerElement, primcount);
			info.update(count, mode, primcount);
		} //


		this.setMode = setMode;
		this.setIndex = setIndex;
		this.render = render;
		this.renderInstances = renderInstances;
	}

	function WebGLInfo(gl) {
		var memory = {
			geometries: 0,
			textures: 0
		};
		var render = {
			frame: 0,
			calls: 0,
			triangles: 0,
			points: 0,
			lines: 0
		};

		function update(count, mode, instanceCount) {
			render.calls++;

			switch (mode) {
				case 4:
					render.triangles += instanceCount * (count / 3);
					break;

				case 1:
					render.lines += instanceCount * (count / 2);
					break;

				case 3:
					render.lines += instanceCount * (count - 1);
					break;

				case 2:
					render.lines += instanceCount * count;
					break;

				case 0:
					render.points += instanceCount * count;
					break;

				default:
					console.error('THREE.WebGLInfo: Unknown draw mode:', mode);
					break;
			}
		}

		function reset() {
			render.frame++;
			render.calls = 0;
			render.triangles = 0;
			render.points = 0;
			render.lines = 0;
		}

		return {
			memory: memory,
			render: render,
			programs: null,
			autoReset: true,
			reset: reset,
			update: update
		};
	}

	function numericalSort(a, b) {
		return a[0] - b[0];
	}

	function absNumericalSort(a, b) {
		return Math.abs(b[1]) - Math.abs(a[1]);
	}

	function WebGLMorphtargets(gl) {
		var influencesList = {};
		var morphInfluences = new Float32Array(8);
		var workInfluences = [];

		for (var i = 0; i < 8; i++) {
			workInfluences[i] = [i, 0];
		}

		function update(object, geometry, material, program) {
			var objectInfluences = object.morphTargetInfluences; // When object doesn't have morph target influences defined, we treat it as a 0-length array
			// This is important to make sure we set up morphTargetBaseInfluence / morphTargetInfluences

			var length = objectInfluences === undefined ? 0 : objectInfluences.length;
			var influences = influencesList[geometry.id];

			if (influences === undefined) {
				// initialise list
				influences = [];

				for (var _i = 0; _i < length; _i++) {
					influences[_i] = [_i, 0];
				}

				influencesList[geometry.id] = influences;
			} // Collect influences


			for (var _i2 = 0; _i2 < length; _i2++) {
				var influence = influences[_i2];
				influence[0] = _i2;
				influence[1] = objectInfluences[_i2];
			}

			influences.sort(absNumericalSort);

			for (var _i3 = 0; _i3 < 8; _i3++) {
				if (_i3 < length && influences[_i3][1]) {
					workInfluences[_i3][0] = influences[_i3][0];
					workInfluences[_i3][1] = influences[_i3][1];
				} else {
					workInfluences[_i3][0] = Number.MAX_SAFE_INTEGER;
					workInfluences[_i3][1] = 0;
				}
			}

			workInfluences.sort(numericalSort);
			var morphTargets = material.morphTargets && geometry.morphAttributes.position;
			var morphNormals = material.morphNormals && geometry.morphAttributes.normal;
			var morphInfluencesSum = 0;

			for (var _i4 = 0; _i4 < 8; _i4++) {
				var _influence = workInfluences[_i4];
				var index = _influence[0];
				var value = _influence[1];

				if (index !== Number.MAX_SAFE_INTEGER && value) {
					if (morphTargets && geometry.getAttribute('morphTarget' + _i4) !== morphTargets[index]) {
						geometry.setAttribute('morphTarget' + _i4, morphTargets[index]);
					}

					if (morphNormals && geometry.getAttribute('morphNormal' + _i4) !== morphNormals[index]) {
						geometry.setAttribute('morphNormal' + _i4, morphNormals[index]);
					}

					morphInfluences[_i4] = value;
					morphInfluencesSum += value;
				} else {
					if (morphTargets && geometry.hasAttribute('morphTarget' + _i4) === true) {
						geometry.deleteAttribute('morphTarget' + _i4);
					}

					if (morphNormals && geometry.hasAttribute('morphNormal' + _i4) === true) {
						geometry.deleteAttribute('morphNormal' + _i4);
					}

					morphInfluences[_i4] = 0;
				}
			} // GLSL shader uses formula baseinfluence * base + sum(target * influence)
			// This allows us to switch between absolute morphs and relative morphs without changing shader code
			// When baseinfluence = 1 - sum(influence), the above is equivalent to sum((target - base) * influence)


			var morphBaseInfluence = geometry.morphTargetsRelative ? 1 : 1 - morphInfluencesSum;
			program.getUniforms().setValue(gl, 'morphTargetBaseInfluence', morphBaseInfluence);
			program.getUniforms().setValue(gl, 'morphTargetInfluences', morphInfluences);
		}

		return {
			update: update
		};
	}

	function WebGLObjects(gl, geometries, attributes, info) {
		var updateMap = new WeakMap();

		function update(object) {
			var frame = info.render.frame;
			var geometry = object.geometry;
			var buffergeometry = geometries.get(object, geometry); // Update once per frame

			if (updateMap.get(buffergeometry) !== frame) {
				geometries.update(buffergeometry);
				updateMap.set(buffergeometry, frame);
			}

			if (object.isInstancedMesh) {
				if (object.hasEventListener('dispose', onInstancedMeshDispose) === false) {
					object.addEventListener('dispose', onInstancedMeshDispose);
				}

				attributes.update(object.instanceMatrix, 34962);

				if (object.instanceColor !== null) {
					attributes.update(object.instanceColor, 34962);
				}
			}

			return buffergeometry;
		}

		function dispose() {
			updateMap = new WeakMap();
		}

		function onInstancedMeshDispose(event) {
			var instancedMesh = event.target;
			instancedMesh.removeEventListener('dispose', onInstancedMeshDispose);
			attributes.remove(instancedMesh.instanceMatrix);
			if (instancedMesh.instanceColor !== null) attributes.remove(instancedMesh.instanceColor);
		}

		return {
			update: update,
			dispose: dispose
		};
	}

	function DataTexture2DArray(data, width, height, depth) {
		if (data === void 0) {
			data = null;
		}

		if (width === void 0) {
			width = 1;
		}

		if (height === void 0) {
			height = 1;
		}

		if (depth === void 0) {
			depth = 1;
		}

		Texture.call(this, null);
		this.image = {
			data: data,
			width: width,
			height: height,
			depth: depth
		};
		this.magFilter = NearestFilter;
		this.minFilter = NearestFilter;
		this.wrapR = ClampToEdgeWrapping;
		this.generateMipmaps = false;
		this.flipY = false;
		this.needsUpdate = true;
	}

	DataTexture2DArray.prototype = Object.create(Texture.prototype);
	DataTexture2DArray.prototype.constructor = DataTexture2DArray;
	DataTexture2DArray.prototype.isDataTexture2DArray = true;

	function DataTexture3D(data, width, height, depth) {
		if (data === void 0) {
			data = null;
		}

		if (width === void 0) {
			width = 1;
		}

		if (height === void 0) {
			height = 1;
		}

		if (depth === void 0) {
			depth = 1;
		}

		// We're going to add .setXXX() methods for setting properties later.
		// Users can still set in DataTexture3D directly.
		//
		//	const texture = new THREE.DataTexture3D( data, width, height, depth );
		// 	texture.anisotropy = 16;
		//
		// See #14839
		Texture.call(this, null);
		this.image = {
			data: data,
			width: width,
			height: height,
			depth: depth
		};
		this.magFilter = NearestFilter;
		this.minFilter = NearestFilter;
		this.wrapR = ClampToEdgeWrapping;
		this.generateMipmaps = false;
		this.flipY = false;
		this.needsUpdate = true;
	}

	DataTexture3D.prototype = Object.create(Texture.prototype);
	DataTexture3D.prototype.constructor = DataTexture3D;
	DataTexture3D.prototype.isDataTexture3D = true;

	/**
	 * Uniforms of a program.
	 * Those form a tree structure with a special top-level container for the root,
	 * which you get by calling 'new WebGLUniforms( gl, program )'.
	 *
	 *
	 * Properties of inner nodes including the top-level container:
	 *
	 * .seq - array of nested uniforms
	 * .map - nested uniforms by name
	 *
	 *
	 * Methods of all nodes except the top-level container:
	 *
	 * .setValue( gl, value, [textures] )
	 *
	 * 		uploads a uniform value(s)
	 *		the 'textures' parameter is needed for sampler uniforms
	 *
	 *
	 * Static methods of the top-level container (textures factorizations):
	 *
	 * .upload( gl, seq, values, textures )
	 *
	 * 		sets uniforms in 'seq' to 'values[id].value'
	 *
	 * .seqWithValue( seq, values ) : filteredSeq
	 *
	 * 		filters 'seq' entries with corresponding entry in values
	 *
	 *
	 * Methods of the top-level container (textures factorizations):
	 *
	 * .setValue( gl, name, value, textures )
	 *
	 * 		sets uniform with	name 'name' to 'value'
	 *
	 * .setOptional( gl, obj, prop )
	 *
	 * 		like .set for an optional property of the object
	 *
	 */
	var emptyTexture = new Texture();
	var emptyTexture2dArray = new DataTexture2DArray();
	var emptyTexture3d = new DataTexture3D();
	var emptyCubeTexture = new CubeTexture(); // --- Utilities ---
	// Array Caches (provide typed arrays for temporary by size)

	var arrayCacheF32 = [];
	var arrayCacheI32 = []; // Float32Array caches used for uploading Matrix uniforms

	var mat4array = new Float32Array(16);
	var mat3array = new Float32Array(9);
	var mat2array = new Float32Array(4); // Flattening for arrays of vectors and matrices

	function flatten(array, nBlocks, blockSize) {
		var firstElem = array[0];
		if (firstElem <= 0 || firstElem > 0) return array; // unoptimized: ! isNaN( firstElem )
		// see http://jacksondunstan.com/articles/983

		var n = nBlocks * blockSize;
		var r = arrayCacheF32[n];

		if (r === undefined) {
			r = new Float32Array(n);
			arrayCacheF32[n] = r;
		}

		if (nBlocks !== 0) {
			firstElem.toArray(r, 0);

			for (var i = 1, offset = 0; i !== nBlocks; ++i) {
				offset += blockSize;
				array[i].toArray(r, offset);
			}
		}

		return r;
	}

	function arraysEqual(a, b) {
		if (a.length !== b.length) return false;

		for (var i = 0, l = a.length; i < l; i++) {
			if (a[i] !== b[i]) return false;
		}

		return true;
	}

	function copyArray(a, b) {
		for (var i = 0, l = b.length; i < l; i++) {
			a[i] = b[i];
		}
	} // Texture unit allocation


	function allocTexUnits(textures, n) {
		var r = arrayCacheI32[n];

		if (r === undefined) {
			r = new Int32Array(n);
			arrayCacheI32[n] = r;
		}

		for (var i = 0; i !== n; ++i) {
			r[i] = textures.allocateTextureUnit();
		}

		return r;
	} // --- Setters ---
	// Note: Defining these methods externally, because they come in a bunch
	// and this way their names minify.
	// Single scalar


	function setValueV1f(gl, v) {
		var cache = this.cache;
		if (cache[0] === v) return;
		gl.uniform1f(this.addr, v);
		cache[0] = v;
	} // Single float vector (from flat array or THREE.VectorN)


	function setValueV2f(gl, v) {
		var cache = this.cache;

		if (v.x !== undefined) {
			if (cache[0] !== v.x || cache[1] !== v.y) {
				gl.uniform2f(this.addr, v.x, v.y);
				cache[0] = v.x;
				cache[1] = v.y;
			}
		} else {
			if (arraysEqual(cache, v)) return;
			gl.uniform2fv(this.addr, v);
			copyArray(cache, v);
		}
	}

	function setValueV3f(gl, v) {
		var cache = this.cache;

		if (v.x !== undefined) {
			if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z) {
				gl.uniform3f(this.addr, v.x, v.y, v.z);
				cache[0] = v.x;
				cache[1] = v.y;
				cache[2] = v.z;
			}
		} else if (v.r !== undefined) {
			if (cache[0] !== v.r || cache[1] !== v.g || cache[2] !== v.b) {
				gl.uniform3f(this.addr, v.r, v.g, v.b);
				cache[0] = v.r;
				cache[1] = v.g;
				cache[2] = v.b;
			}
		} else {
			if (arraysEqual(cache, v)) return;
			gl.uniform3fv(this.addr, v);
			copyArray(cache, v);
		}
	}

	function setValueV4f(gl, v) {
		var cache = this.cache;

		if (v.x !== undefined) {
			if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z || cache[3] !== v.w) {
				gl.uniform4f(this.addr, v.x, v.y, v.z, v.w);
				cache[0] = v.x;
				cache[1] = v.y;
				cache[2] = v.z;
				cache[3] = v.w;
			}
		} else {
			if (arraysEqual(cache, v)) return;
			gl.uniform4fv(this.addr, v);
			copyArray(cache, v);
		}
	} // Single matrix (from flat array or MatrixN)


	function setValueM2(gl, v) {
		var cache = this.cache;
		var elements = v.elements;

		if (elements === undefined) {
			if (arraysEqual(cache, v)) return;
			gl.uniformMatrix2fv(this.addr, false, v);
			copyArray(cache, v);
		} else {
			if (arraysEqual(cache, elements)) return;
			mat2array.set(elements);
			gl.uniformMatrix2fv(this.addr, false, mat2array);
			copyArray(cache, elements);
		}
	}

	function setValueM3(gl, v) {
		var cache = this.cache;
		var elements = v.elements;

		if (elements === undefined) {
			if (arraysEqual(cache, v)) return;
			gl.uniformMatrix3fv(this.addr, false, v);
			copyArray(cache, v);
		} else {
			if (arraysEqual(cache, elements)) return;
			mat3array.set(elements);
			gl.uniformMatrix3fv(this.addr, false, mat3array);
			copyArray(cache, elements);
		}
	}

	function setValueM4(gl, v) {
		var cache = this.cache;
		var elements = v.elements;

		if (elements === undefined) {
			if (arraysEqual(cache, v)) return;
			gl.uniformMatrix4fv(this.addr, false, v);
			copyArray(cache, v);
		} else {
			if (arraysEqual(cache, elements)) return;
			mat4array.set(elements);
			gl.uniformMatrix4fv(this.addr, false, mat4array);
			copyArray(cache, elements);
		}
	} // Single texture (2D / Cube)


	function setValueT1(gl, v, textures) {
		var cache = this.cache;
		var unit = textures.allocateTextureUnit();

		if (cache[0] !== unit) {
			gl.uniform1i(this.addr, unit);
			cache[0] = unit;
		}

		textures.safeSetTexture2D(v || emptyTexture, unit);
	}

	function setValueT2DArray1(gl, v, textures) {
		var cache = this.cache;
		var unit = textures.allocateTextureUnit();

		if (cache[0] !== unit) {
			gl.uniform1i(this.addr, unit);
			cache[0] = unit;
		}

		textures.setTexture2DArray(v || emptyTexture2dArray, unit);
	}

	function setValueT3D1(gl, v, textures) {
		var cache = this.cache;
		var unit = textures.allocateTextureUnit();

		if (cache[0] !== unit) {
			gl.uniform1i(this.addr, unit);
			cache[0] = unit;
		}

		textures.setTexture3D(v || emptyTexture3d, unit);
	}

	function setValueT6(gl, v, textures) {
		var cache = this.cache;
		var unit = textures.allocateTextureUnit();

		if (cache[0] !== unit) {
			gl.uniform1i(this.addr, unit);
			cache[0] = unit;
		}

		textures.safeSetTextureCube(v || emptyCubeTexture, unit);
	} // Integer / Boolean vectors or arrays thereof (always flat arrays)


	function setValueV1i(gl, v) {
		var cache = this.cache;
		if (cache[0] === v) return;
		gl.uniform1i(this.addr, v);
		cache[0] = v;
	}

	function setValueV2i(gl, v) {
		var cache = this.cache;
		if (arraysEqual(cache, v)) return;
		gl.uniform2iv(this.addr, v);
		copyArray(cache, v);
	}

	function setValueV3i(gl, v) {
		var cache = this.cache;
		if (arraysEqual(cache, v)) return;
		gl.uniform3iv(this.addr, v);
		copyArray(cache, v);
	}

	function setValueV4i(gl, v) {
		var cache = this.cache;
		if (arraysEqual(cache, v)) return;
		gl.uniform4iv(this.addr, v);
		copyArray(cache, v);
	} // uint


	function setValueV1ui(gl, v) {
		var cache = this.cache;
		if (cache[0] === v) return;
		gl.uniform1ui(this.addr, v);
		cache[0] = v;
	} // Helper to pick the right setter for the singular case


	function getSingularSetter(type) {
		switch (type) {
			case 0x1406:
				return setValueV1f;
			// FLOAT

			case 0x8b50:
				return setValueV2f;
			// _VEC2

			case 0x8b51:
				return setValueV3f;
			// _VEC3

			case 0x8b52:
				return setValueV4f;
			// _VEC4

			case 0x8b5a:
				return setValueM2;
			// _MAT2

			case 0x8b5b:
				return setValueM3;
			// _MAT3

			case 0x8b5c:
				return setValueM4;
			// _MAT4

			case 0x1404:
			case 0x8b56:
				return setValueV1i;
			// INT, BOOL

			case 0x8b53:
			case 0x8b57:
				return setValueV2i;
			// _VEC2

			case 0x8b54:
			case 0x8b58:
				return setValueV3i;
			// _VEC3

			case 0x8b55:
			case 0x8b59:
				return setValueV4i;
			// _VEC4

			case 0x1405:
				return setValueV1ui;
			// UINT

			case 0x8b5e: // SAMPLER_2D

			case 0x8d66: // SAMPLER_EXTERNAL_OES

			case 0x8dca: // INT_SAMPLER_2D

			case 0x8dd2: // UNSIGNED_INT_SAMPLER_2D

			case 0x8b62:
				// SAMPLER_2D_SHADOW
				return setValueT1;

			case 0x8b5f: // SAMPLER_3D

			case 0x8dcb: // INT_SAMPLER_3D

			case 0x8dd3:
				// UNSIGNED_INT_SAMPLER_3D
				return setValueT3D1;

			case 0x8b60: // SAMPLER_CUBE

			case 0x8dcc: // INT_SAMPLER_CUBE

			case 0x8dd4: // UNSIGNED_INT_SAMPLER_CUBE

			case 0x8dc5:
				// SAMPLER_CUBE_SHADOW
				return setValueT6;

			case 0x8dc1: // SAMPLER_2D_ARRAY

			case 0x8dcf: // INT_SAMPLER_2D_ARRAY

			case 0x8dd7: // UNSIGNED_INT_SAMPLER_2D_ARRAY

			case 0x8dc4:
				// SAMPLER_2D_ARRAY_SHADOW
				return setValueT2DArray1;
		}
	} // Array of scalars


	function setValueV1fArray(gl, v) {
		gl.uniform1fv(this.addr, v);
	} // Integer / Boolean vectors or arrays thereof (always flat arrays)


	function setValueV1iArray(gl, v) {
		gl.uniform1iv(this.addr, v);
	}

	function setValueV2iArray(gl, v) {
		gl.uniform2iv(this.addr, v);
	}

	function setValueV3iArray(gl, v) {
		gl.uniform3iv(this.addr, v);
	}

	function setValueV4iArray(gl, v) {
		gl.uniform4iv(this.addr, v);
	} // Array of vectors (flat or from THREE classes)


	function setValueV2fArray(gl, v) {
		var data = flatten(v, this.size, 2);
		gl.uniform2fv(this.addr, data);
	}

	function setValueV3fArray(gl, v) {
		var data = flatten(v, this.size, 3);
		gl.uniform3fv(this.addr, data);
	}

	function setValueV4fArray(gl, v) {
		var data = flatten(v, this.size, 4);
		gl.uniform4fv(this.addr, data);
	} // Array of matrices (flat or from THREE clases)


	function setValueM2Array(gl, v) {
		var data = flatten(v, this.size, 4);
		gl.uniformMatrix2fv(this.addr, false, data);
	}

	function setValueM3Array(gl, v) {
		var data = flatten(v, this.size, 9);
		gl.uniformMatrix3fv(this.addr, false, data);
	}

	function setValueM4Array(gl, v) {
		var data = flatten(v, this.size, 16);
		gl.uniformMatrix4fv(this.addr, false, data);
	} // Array of textures (2D / Cube)


	function setValueT1Array(gl, v, textures) {
		var n = v.length;
		var units = allocTexUnits(textures, n);
		gl.uniform1iv(this.addr, units);

		for (var i = 0; i !== n; ++i) {
			textures.safeSetTexture2D(v[i] || emptyTexture, units[i]);
		}
	}

	function setValueT6Array(gl, v, textures) {
		var n = v.length;
		var units = allocTexUnits(textures, n);
		gl.uniform1iv(this.addr, units);

		for (var i = 0; i !== n; ++i) {
			textures.safeSetTextureCube(v[i] || emptyCubeTexture, units[i]);
		}
	} // Helper to pick the right setter for a pure (bottom-level) array


	function getPureArraySetter(type) {
		switch (type) {
			case 0x1406:
				return setValueV1fArray;
			// FLOAT

			case 0x8b50:
				return setValueV2fArray;
			// _VEC2

			case 0x8b51:
				return setValueV3fArray;
			// _VEC3

			case 0x8b52:
				return setValueV4fArray;
			// _VEC4

			case 0x8b5a:
				return setValueM2Array;
			// _MAT2

			case 0x8b5b:
				return setValueM3Array;
			// _MAT3

			case 0x8b5c:
				return setValueM4Array;
			// _MAT4

			case 0x1404:
			case 0x8b56:
				return setValueV1iArray;
			// INT, BOOL

			case 0x8b53:
			case 0x8b57:
				return setValueV2iArray;
			// _VEC2

			case 0x8b54:
			case 0x8b58:
				return setValueV3iArray;
			// _VEC3

			case 0x8b55:
			case 0x8b59:
				return setValueV4iArray;
			// _VEC4

			case 0x8b5e: // SAMPLER_2D

			case 0x8d66: // SAMPLER_EXTERNAL_OES

			case 0x8dca: // INT_SAMPLER_2D

			case 0x8dd2: // UNSIGNED_INT_SAMPLER_2D

			case 0x8b62:
				// SAMPLER_2D_SHADOW
				return setValueT1Array;

			case 0x8b60: // SAMPLER_CUBE

			case 0x8dcc: // INT_SAMPLER_CUBE

			case 0x8dd4: // UNSIGNED_INT_SAMPLER_CUBE

			case 0x8dc5:
				// SAMPLER_CUBE_SHADOW
				return setValueT6Array;
		}
	} // --- Uniform Classes ---


	function SingleUniform(id, activeInfo, addr) {
		this.id = id;
		this.addr = addr;
		this.cache = [];
		this.setValue = getSingularSetter(activeInfo.type); // this.path = activeInfo.name; // DEBUG
	}

	function PureArrayUniform(id, activeInfo, addr) {
		this.id = id;
		this.addr = addr;
		this.cache = [];
		this.size = activeInfo.size;
		this.setValue = getPureArraySetter(activeInfo.type); // this.path = activeInfo.name; // DEBUG
	}

	PureArrayUniform.prototype.updateCache = function (data) {
		var cache = this.cache;

		if (data instanceof Float32Array && cache.length !== data.length) {
			this.cache = new Float32Array(data.length);
		}

		copyArray(cache, data);
	};

	function StructuredUniform(id) {
		this.id = id;
		this.seq = [];
		this.map = {};
	}

	StructuredUniform.prototype.setValue = function (gl, value, textures) {
		var seq = this.seq;

		for (var i = 0, n = seq.length; i !== n; ++i) {
			var u = seq[i];
			u.setValue(gl, value[u.id], textures);
		}
	}; // --- Top-level ---
	// Parser - builds up the property tree from the path strings


	var RePathPart = /(\w+)(\])?(\[|\.)?/g; // extracts
	// 	- the identifier (member name or array index)
	//	- followed by an optional right bracket (found when array index)
	//	- followed by an optional left bracket or dot (type of subscript)
	//
	// Note: These portions can be read in a non-overlapping fashion and
	// allow straightforward parsing of the hierarchy that WebGL encodes
	// in the uniform names.

	function addUniform(container, uniformObject) {
		container.seq.push(uniformObject);
		container.map[uniformObject.id] = uniformObject;
	}

	function parseUniform(activeInfo, addr, container) {
		var path = activeInfo.name,
				pathLength = path.length; // reset RegExp object, because of the early exit of a previous run

		RePathPart.lastIndex = 0;

		while (true) {
			var match = RePathPart.exec(path),
					matchEnd = RePathPart.lastIndex;
			var id = match[1];
			var idIsIndex = match[2] === ']',
					subscript = match[3];
			if (idIsIndex) id = id | 0; // convert to integer

			if (subscript === undefined || subscript === '[' && matchEnd + 2 === pathLength) {
				// bare name or "pure" bottom-level array "[0]" suffix
				addUniform(container, subscript === undefined ? new SingleUniform(id, activeInfo, addr) : new PureArrayUniform(id, activeInfo, addr));
				break;
			} else {
				// step into inner node / create it in case it doesn't exist
				var map = container.map;
				var next = map[id];

				if (next === undefined) {
					next = new StructuredUniform(id);
					addUniform(container, next);
				}

				container = next;
			}
		}
	} // Root Container


	function WebGLUniforms(gl, program) {
		this.seq = [];
		this.map = {};
		var n = gl.getProgramParameter(program, 35718);

		for (var i = 0; i < n; ++i) {
			var info = gl.getActiveUniform(program, i),
					addr = gl.getUniformLocation(program, info.name);
			parseUniform(info, addr, this);
		}
	}

	WebGLUniforms.prototype.setValue = function (gl, name, value, textures) {
		var u = this.map[name];
		if (u !== undefined) u.setValue(gl, value, textures);
	};

	WebGLUniforms.prototype.setOptional = function (gl, object, name) {
		var v = object[name];
		if (v !== undefined) this.setValue(gl, name, v);
	}; // Static interface


	WebGLUniforms.upload = function (gl, seq, values, textures) {
		for (var i = 0, n = seq.length; i !== n; ++i) {
			var u = seq[i],
					v = values[u.id];

			if (v.needsUpdate !== false) {
				// note: always updating when .needsUpdate is undefined
				u.setValue(gl, v.value, textures);
			}
		}
	};

	WebGLUniforms.seqWithValue = function (seq, values) {
		var r = [];

		for (var i = 0, n = seq.length; i !== n; ++i) {
			var u = seq[i];
			if (u.id in values) r.push(u);
		}

		return r;
	};

	function WebGLShader(gl, type, string) {
		var shader = gl.createShader(type);
		gl.shaderSource(shader, string);
		gl.compileShader(shader);
		return shader;
	}

	var programIdCount = 0;

	function addLineNumbers(string) {
		var lines = string.split('\n');

		for (var i = 0; i < lines.length; i++) {
			lines[i] = i + 1 + ': ' + lines[i];
		}

		return lines.join('\n');
	}

	function getEncodingComponents(encoding) {
		switch (encoding) {
			case LinearEncoding:
				return ['Linear', '( value )'];

			case sRGBEncoding:
				return ['sRGB', '( value )'];

			case RGBEEncoding:
				return ['RGBE', '( value )'];

			case RGBM7Encoding:
				return ['RGBM', '( value, 7.0 )'];

			case RGBM16Encoding:
				return ['RGBM', '( value, 16.0 )'];

			case RGBDEncoding:
				return ['RGBD', '( value, 256.0 )'];

			case GammaEncoding:
				return ['Gamma', '( value, float( GAMMA_FACTOR ) )'];

			case LogLuvEncoding:
				return ['LogLuv', '( value )'];

			default:
				console.warn('THREE.WebGLProgram: Unsupported encoding:', encoding);
				return ['Linear', '( value )'];
		}
	}

	function getShaderErrors(gl, shader, type) {
		var status = gl.getShaderParameter(shader, 35713);
		var log = gl.getShaderInfoLog(shader).trim();
		if (status && log === '') return ''; // --enable-privileged-webgl-extension
		// console.log( '**' + type + '**', gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( shader ) );

		var source = gl.getShaderSource(shader);
		return 'THREE.WebGLShader: gl.getShaderInfoLog() ' + type + '\n' + log + addLineNumbers(source);
	}

	function getTexelDecodingFunction(functionName, encoding) {
		var components = getEncodingComponents(encoding);
		return 'vec4 ' + functionName + '( vec4 value ) { return ' + components[0] + 'ToLinear' + components[1] + '; }';
	}

	function getTexelEncodingFunction(functionName, encoding) {
		var components = getEncodingComponents(encoding);
		return 'vec4 ' + functionName + '( vec4 value ) { return LinearTo' + components[0] + components[1] + '; }';
	}

	function getToneMappingFunction(functionName, toneMapping) {
		var toneMappingName;

		switch (toneMapping) {
			case LinearToneMapping:
				toneMappingName = 'Linear';
				break;

			case ReinhardToneMapping:
				toneMappingName = 'Reinhard';
				break;

			case CineonToneMapping:
				toneMappingName = 'OptimizedCineon';
				break;

			case ACESFilmicToneMapping:
				toneMappingName = 'ACESFilmic';
				break;

			case CustomToneMapping:
				toneMappingName = 'Custom';
				break;

			default:
				console.warn('THREE.WebGLProgram: Unsupported toneMapping:', toneMapping);
				toneMappingName = 'Linear';
		}

		return 'vec3 ' + functionName + '( vec3 color ) { return ' + toneMappingName + 'ToneMapping( color ); }';
	}

	function generateExtensions(parameters) {
		var chunks = [parameters.extensionDerivatives || parameters.envMapCubeUV || parameters.bumpMap || parameters.tangentSpaceNormalMap || parameters.clearcoatNormalMap || parameters.flatShading || parameters.shaderID === 'physical' ? '#extension GL_OES_standard_derivatives : enable' : '', (parameters.extensionFragDepth || parameters.logarithmicDepthBuffer) && parameters.rendererExtensionFragDepth ? '#extension GL_EXT_frag_depth : enable' : '', parameters.extensionDrawBuffers && parameters.rendererExtensionDrawBuffers ? '#extension GL_EXT_draw_buffers : require' : '', (parameters.extensionShaderTextureLOD || parameters.envMap) && parameters.rendererExtensionShaderTextureLod ? '#extension GL_EXT_shader_texture_lod : enable' : ''];
		return chunks.filter(filterEmptyLine).join('\n');
	}

	function generateDefines(defines) {
		var chunks = [];

		for (var name in defines) {
			var value = defines[name];
			if (value === false) continue;
			chunks.push('#define ' + name + ' ' + value);
		}

		return chunks.join('\n');
	}

	function fetchAttributeLocations(gl, program) {
		var attributes = {};
		var n = gl.getProgramParameter(program, 35721);

		for (var i = 0; i < n; i++) {
			var info = gl.getActiveAttrib(program, i);
			var name = info.name; // console.log( 'THREE.WebGLProgram: ACTIVE VERTEX ATTRIBUTE:', name, i );

			attributes[name] = gl.getAttribLocation(program, name);
		}

		return attributes;
	}

	function filterEmptyLine(string) {
		return string !== '';
	}

	function replaceLightNums(string, parameters) {
		return string.replace(/NUM_DIR_LIGHTS/g, parameters.numDirLights).replace(/NUM_SPOT_LIGHTS/g, parameters.numSpotLights).replace(/NUM_RECT_AREA_LIGHTS/g, parameters.numRectAreaLights).replace(/NUM_POINT_LIGHTS/g, parameters.numPointLights).replace(/NUM_HEMI_LIGHTS/g, parameters.numHemiLights).replace(/NUM_DIR_LIGHT_SHADOWS/g, parameters.numDirLightShadows).replace(/NUM_SPOT_LIGHT_SHADOWS/g, parameters.numSpotLightShadows).replace(/NUM_POINT_LIGHT_SHADOWS/g, parameters.numPointLightShadows);
	}

	function replaceClippingPlaneNums(string, parameters) {
		return string.replace(/NUM_CLIPPING_PLANES/g, parameters.numClippingPlanes).replace(/UNION_CLIPPING_PLANES/g, parameters.numClippingPlanes - parameters.numClipIntersection);
	} // Resolve Includes


	var includePattern = /^[ \t]*#include +<([\w\d./]+)>/gm;

	function resolveIncludes(string) {
		return string.replace(includePattern, includeReplacer);
	}

	function includeReplacer(match, include) {
		var string = ShaderChunk[include];

		if (string === undefined) {
			throw new Error('Can not resolve #include <' + include + '>');
		}

		return resolveIncludes(string);
	} // Unroll Loops


	var deprecatedUnrollLoopPattern = /#pragma unroll_loop[\s]+?for \( int i \= (\d+)\; i < (\d+)\; i \+\+ \) \{([\s\S]+?)(?=\})\}/g;
	var unrollLoopPattern = /#pragma unroll_loop_start\s+for\s*\(\s*int\s+i\s*=\s*(\d+)\s*;\s*i\s*<\s*(\d+)\s*;\s*i\s*\+\+\s*\)\s*{([\s\S]+?)}\s+#pragma unroll_loop_end/g;

	function unrollLoops(string) {
		return string.replace(unrollLoopPattern, loopReplacer).replace(deprecatedUnrollLoopPattern, deprecatedLoopReplacer);
	}

	function deprecatedLoopReplacer(match, start, end, snippet) {
		console.warn('WebGLProgram: #pragma unroll_loop shader syntax is deprecated. Please use #pragma unroll_loop_start syntax instead.');
		return loopReplacer(match, start, end, snippet);
	}

	function loopReplacer(match, start, end, snippet) {
		var string = '';

		for (var i = parseInt(start); i < parseInt(end); i++) {
			string += snippet.replace(/\[\s*i\s*\]/g, '[ ' + i + ' ]').replace(/UNROLLED_LOOP_INDEX/g, i);
		}

		return string;
	} //


	function generatePrecision(parameters) {
		var precisionstring = 'precision ' + parameters.precision + ' float;\nprecision ' + parameters.precision + ' int;';

		if (parameters.precision === 'highp') {
			precisionstring += '\n#define HIGH_PRECISION';
		} else if (parameters.precision === 'mediump') {
			precisionstring += '\n#define MEDIUM_PRECISION';
		} else if (parameters.precision === 'lowp') {
			precisionstring += '\n#define LOW_PRECISION';
		}

		return precisionstring;
	}

	function generateShadowMapTypeDefine(parameters) {
		var shadowMapTypeDefine = 'SHADOWMAP_TYPE_BASIC';

		if (parameters.shadowMapType === PCFShadowMap) {
			shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF';
		} else if (parameters.shadowMapType === PCFSoftShadowMap) {
			shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF_SOFT';
		} else if (parameters.shadowMapType === VSMShadowMap) {
			shadowMapTypeDefine = 'SHADOWMAP_TYPE_VSM';
		}

		return shadowMapTypeDefine;
	}

	function generateEnvMapTypeDefine(parameters) {
		var envMapTypeDefine = 'ENVMAP_TYPE_CUBE';

		if (parameters.envMap) {
			switch (parameters.envMapMode) {
				case CubeReflectionMapping:
				case CubeRefractionMapping:
					envMapTypeDefine = 'ENVMAP_TYPE_CUBE';
					break;

				case CubeUVReflectionMapping:
				case CubeUVRefractionMapping:
					envMapTypeDefine = 'ENVMAP_TYPE_CUBE_UV';
					break;
			}
		}

		return envMapTypeDefine;
	}

	function generateEnvMapModeDefine(parameters) {
		var envMapModeDefine = 'ENVMAP_MODE_REFLECTION';

		if (parameters.envMap) {
			switch (parameters.envMapMode) {
				case CubeRefractionMapping:
				case CubeUVRefractionMapping:
					envMapModeDefine = 'ENVMAP_MODE_REFRACTION';
					break;
			}
		}

		return envMapModeDefine;
	}

	function generateEnvMapBlendingDefine(parameters) {
		var envMapBlendingDefine = 'ENVMAP_BLENDING_NONE';

		if (parameters.envMap) {
			switch (parameters.combine) {
				case MultiplyOperation:
					envMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';
					break;

				case MixOperation:
					envMapBlendingDefine = 'ENVMAP_BLENDING_MIX';
					break;

				case AddOperation:
					envMapBlendingDefine = 'ENVMAP_BLENDING_ADD';
					break;
			}
		}

		return envMapBlendingDefine;
	}

	function WebGLProgram(renderer, cacheKey, parameters, bindingStates) {
		var gl = renderer.getContext();
		var defines = parameters.defines;
		var vertexShader = parameters.vertexShader;
		var fragmentShader = parameters.fragmentShader;
		var shadowMapTypeDefine = generateShadowMapTypeDefine(parameters);
		var envMapTypeDefine = generateEnvMapTypeDefine(parameters);
		var envMapModeDefine = generateEnvMapModeDefine(parameters);
		var envMapBlendingDefine = generateEnvMapBlendingDefine(parameters);
		var gammaFactorDefine = renderer.gammaFactor > 0 ? renderer.gammaFactor : 1.0;
		var customExtensions = parameters.isWebGL2 ? '' : generateExtensions(parameters);
		var customDefines = generateDefines(defines);
		var program = gl.createProgram();
		var prefixVertex, prefixFragment;
		var versionString = parameters.glslVersion ? '#version ' + parameters.glslVersion + '\n' : '';

		if (parameters.isRawShaderMaterial) {
			prefixVertex = [customDefines].filter(filterEmptyLine).join('\n');

			if (prefixVertex.length > 0) {
				prefixVertex += '\n';
			}

			prefixFragment = [customExtensions, customDefines].filter(filterEmptyLine).join('\n');

			if (prefixFragment.length > 0) {
				prefixFragment += '\n';
			}
		} else {
			prefixVertex = [generatePrecision(parameters), '#define SHADER_NAME ' + parameters.shaderName, customDefines, parameters.instancing ? '#define USE_INSTANCING' : '', parameters.instancingColor ? '#define USE_INSTANCING_COLOR' : '', parameters.supportsVertexTextures ? '#define VERTEX_TEXTURES' : '', '#define GAMMA_FACTOR ' + gammaFactorDefine, '#define MAX_BONES ' + parameters.maxBones, parameters.useFog && parameters.fog ? '#define USE_FOG' : '', parameters.useFog && parameters.fogExp2 ? '#define FOG_EXP2' : '', parameters.map ? '#define USE_MAP' : '', parameters.envMap ? '#define USE_ENVMAP' : '', parameters.envMap ? '#define ' + envMapModeDefine : '', parameters.lightMap ? '#define USE_LIGHTMAP' : '', parameters.aoMap ? '#define USE_AOMAP' : '', parameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '', parameters.bumpMap ? '#define USE_BUMPMAP' : '', parameters.normalMap ? '#define USE_NORMALMAP' : '', parameters.normalMap && parameters.objectSpaceNormalMap ? '#define OBJECTSPACE_NORMALMAP' : '', parameters.normalMap && parameters.tangentSpaceNormalMap ? '#define TANGENTSPACE_NORMALMAP' : '', parameters.clearcoatMap ? '#define USE_CLEARCOATMAP' : '', parameters.clearcoatRoughnessMap ? '#define USE_CLEARCOAT_ROUGHNESSMAP' : '', parameters.clearcoatNormalMap ? '#define USE_CLEARCOAT_NORMALMAP' : '', parameters.displacementMap && parameters.supportsVertexTextures ? '#define USE_DISPLACEMENTMAP' : '', parameters.specularMap ? '#define USE_SPECULARMAP' : '', parameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '', parameters.metalnessMap ? '#define USE_METALNESSMAP' : '', parameters.alphaMap ? '#define USE_ALPHAMAP' : '', parameters.transmissionMap ? '#define USE_TRANSMISSIONMAP' : '', parameters.vertexTangents ? '#define USE_TANGENT' : '', parameters.vertexColors ? '#define USE_COLOR' : '', parameters.vertexUvs ? '#define USE_UV' : '', parameters.uvsVertexOnly ? '#define UVS_VERTEX_ONLY' : '', parameters.flatShading ? '#define FLAT_SHADED' : '', parameters.skinning ? '#define USE_SKINNING' : '', parameters.useVertexTexture ? '#define BONE_TEXTURE' : '', parameters.morphTargets ? '#define USE_MORPHTARGETS' : '', parameters.morphNormals && parameters.flatShading === false ? '#define USE_MORPHNORMALS' : '', parameters.doubleSided ? '#define DOUBLE_SIDED' : '', parameters.flipSided ? '#define FLIP_SIDED' : '', parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '', parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '', parameters.sizeAttenuation ? '#define USE_SIZEATTENUATION' : '', parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '', parameters.logarithmicDepthBuffer && parameters.rendererExtensionFragDepth ? '#define USE_LOGDEPTHBUF_EXT' : '', 'uniform mat4 modelMatrix;', 'uniform mat4 modelViewMatrix;', 'uniform mat4 projectionMatrix;', 'uniform mat4 viewMatrix;', 'uniform mat3 normalMatrix;', 'uniform vec3 cameraPosition;', 'uniform bool isOrthographic;', '#ifdef USE_INSTANCING', '	attribute mat4 instanceMatrix;', '#endif', '#ifdef USE_INSTANCING_COLOR', '	attribute vec3 instanceColor;', '#endif', 'attribute vec3 position;', 'attribute vec3 normal;', 'attribute vec2 uv;', '#ifdef USE_TANGENT', '	attribute vec4 tangent;', '#endif', '#ifdef USE_COLOR', '	attribute vec3 color;', '#endif', '#ifdef USE_MORPHTARGETS', '	attribute vec3 morphTarget0;', '	attribute vec3 morphTarget1;', '	attribute vec3 morphTarget2;', '	attribute vec3 morphTarget3;', '	#ifdef USE_MORPHNORMALS', '		attribute vec3 morphNormal0;', '		attribute vec3 morphNormal1;', '		attribute vec3 morphNormal2;', '		attribute vec3 morphNormal3;', '	#else', '		attribute vec3 morphTarget4;', '		attribute vec3 morphTarget5;', '		attribute vec3 morphTarget6;', '		attribute vec3 morphTarget7;', '	#endif', '#endif', '#ifdef USE_SKINNING', '	attribute vec4 skinIndex;', '	attribute vec4 skinWeight;', '#endif', '\n'].filter(filterEmptyLine).join('\n');
			prefixFragment = [customExtensions, generatePrecision(parameters), '#define SHADER_NAME ' + parameters.shaderName, customDefines, parameters.alphaTest ? '#define ALPHATEST ' + parameters.alphaTest + (parameters.alphaTest % 1 ? '' : '.0') : '', // add '.0' if integer
			'#define GAMMA_FACTOR ' + gammaFactorDefine, parameters.useFog && parameters.fog ? '#define USE_FOG' : '', parameters.useFog && parameters.fogExp2 ? '#define FOG_EXP2' : '', parameters.map ? '#define USE_MAP' : '', parameters.matcap ? '#define USE_MATCAP' : '', parameters.envMap ? '#define USE_ENVMAP' : '', parameters.envMap ? '#define ' + envMapTypeDefine : '', parameters.envMap ? '#define ' + envMapModeDefine : '', parameters.envMap ? '#define ' + envMapBlendingDefine : '', parameters.lightMap ? '#define USE_LIGHTMAP' : '', parameters.aoMap ? '#define USE_AOMAP' : '', parameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '', parameters.bumpMap ? '#define USE_BUMPMAP' : '', parameters.normalMap ? '#define USE_NORMALMAP' : '', parameters.normalMap && parameters.objectSpaceNormalMap ? '#define OBJECTSPACE_NORMALMAP' : '', parameters.normalMap && parameters.tangentSpaceNormalMap ? '#define TANGENTSPACE_NORMALMAP' : '', parameters.clearcoatMap ? '#define USE_CLEARCOATMAP' : '', parameters.clearcoatRoughnessMap ? '#define USE_CLEARCOAT_ROUGHNESSMAP' : '', parameters.clearcoatNormalMap ? '#define USE_CLEARCOAT_NORMALMAP' : '', parameters.specularMap ? '#define USE_SPECULARMAP' : '', parameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '', parameters.metalnessMap ? '#define USE_METALNESSMAP' : '', parameters.alphaMap ? '#define USE_ALPHAMAP' : '', parameters.sheen ? '#define USE_SHEEN' : '', parameters.transmissionMap ? '#define USE_TRANSMISSIONMAP' : '', parameters.vertexTangents ? '#define USE_TANGENT' : '', parameters.vertexColors || parameters.instancingColor ? '#define USE_COLOR' : '', parameters.vertexUvs ? '#define USE_UV' : '', parameters.uvsVertexOnly ? '#define UVS_VERTEX_ONLY' : '', parameters.gradientMap ? '#define USE_GRADIENTMAP' : '', parameters.flatShading ? '#define FLAT_SHADED' : '', parameters.doubleSided ? '#define DOUBLE_SIDED' : '', parameters.flipSided ? '#define FLIP_SIDED' : '', parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '', parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '', parameters.premultipliedAlpha ? '#define PREMULTIPLIED_ALPHA' : '', parameters.physicallyCorrectLights ? '#define PHYSICALLY_CORRECT_LIGHTS' : '', parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '', parameters.logarithmicDepthBuffer && parameters.rendererExtensionFragDepth ? '#define USE_LOGDEPTHBUF_EXT' : '', (parameters.extensionShaderTextureLOD || parameters.envMap) && parameters.rendererExtensionShaderTextureLod ? '#define TEXTURE_LOD_EXT' : '', 'uniform mat4 viewMatrix;', 'uniform vec3 cameraPosition;', 'uniform bool isOrthographic;', parameters.toneMapping !== NoToneMapping ? '#define TONE_MAPPING' : '', parameters.toneMapping !== NoToneMapping ? ShaderChunk['tonemapping_pars_fragment'] : '', // this code is required here because it is used by the toneMapping() function defined below
			parameters.toneMapping !== NoToneMapping ? getToneMappingFunction('toneMapping', parameters.toneMapping) : '', parameters.dithering ? '#define DITHERING' : '', ShaderChunk['encodings_pars_fragment'], // this code is required here because it is used by the various encoding/decoding function defined below
			parameters.map ? getTexelDecodingFunction('mapTexelToLinear', parameters.mapEncoding) : '', parameters.matcap ? getTexelDecodingFunction('matcapTexelToLinear', parameters.matcapEncoding) : '', parameters.envMap ? getTexelDecodingFunction('envMapTexelToLinear', parameters.envMapEncoding) : '', parameters.emissiveMap ? getTexelDecodingFunction('emissiveMapTexelToLinear', parameters.emissiveMapEncoding) : '', parameters.lightMap ? getTexelDecodingFunction('lightMapTexelToLinear', parameters.lightMapEncoding) : '', getTexelEncodingFunction('linearToOutputTexel', parameters.outputEncoding), parameters.depthPacking ? '#define DEPTH_PACKING ' + parameters.depthPacking : '', '\n'].filter(filterEmptyLine).join('\n');
		}

		vertexShader = resolveIncludes(vertexShader);
		vertexShader = replaceLightNums(vertexShader, parameters);
		vertexShader = replaceClippingPlaneNums(vertexShader, parameters);
		fragmentShader = resolveIncludes(fragmentShader);
		fragmentShader = replaceLightNums(fragmentShader, parameters);
		fragmentShader = replaceClippingPlaneNums(fragmentShader, parameters);
		vertexShader = unrollLoops(vertexShader);
		fragmentShader = unrollLoops(fragmentShader);

		if (parameters.isWebGL2 && parameters.isRawShaderMaterial !== true) {
			// GLSL 3.0 conversion for built-in materials and ShaderMaterial
			versionString = '#version 300 es\n';
			prefixVertex = ['#define attribute in', '#define varying out', '#define texture2D texture'].join('\n') + '\n' + prefixVertex;
			prefixFragment = ['#define varying in', parameters.glslVersion === GLSL3 ? '' : 'out highp vec4 pc_fragColor;', parameters.glslVersion === GLSL3 ? '' : '#define gl_FragColor pc_fragColor', '#define gl_FragDepthEXT gl_FragDepth', '#define texture2D texture', '#define textureCube texture', '#define texture2DProj textureProj', '#define texture2DLodEXT textureLod', '#define texture2DProjLodEXT textureProjLod', '#define textureCubeLodEXT textureLod', '#define texture2DGradEXT textureGrad', '#define texture2DProjGradEXT textureProjGrad', '#define textureCubeGradEXT textureGrad'].join('\n') + '\n' + prefixFragment;
		}

		var vertexGlsl = versionString + prefixVertex + vertexShader;
		var fragmentGlsl = versionString + prefixFragment + fragmentShader; // console.log( '*VERTEX*', vertexGlsl );
		// console.log( '*FRAGMENT*', fragmentGlsl );

		var glVertexShader = WebGLShader(gl, 35633, vertexGlsl);
		var glFragmentShader = WebGLShader(gl, 35632, fragmentGlsl);
		gl.attachShader(program, glVertexShader);
		gl.attachShader(program, glFragmentShader); // Force a particular attribute to index 0.

		if (parameters.index0AttributeName !== undefined) {
			gl.bindAttribLocation(program, 0, parameters.index0AttributeName);
		} else if (parameters.morphTargets === true) {
			// programs with morphTargets displace position out of attribute 0
			gl.bindAttribLocation(program, 0, 'position');
		}

		gl.linkProgram(program); // check for link errors

		if (renderer.debug.checkShaderErrors) {
			var programLog = gl.getProgramInfoLog(program).trim();
			var vertexLog = gl.getShaderInfoLog(glVertexShader).trim();
			var fragmentLog = gl.getShaderInfoLog(glFragmentShader).trim();
			var runnable = true;
			var haveDiagnostics = true;

			if (gl.getProgramParameter(program, 35714) === false) {
				runnable = false;
				var vertexErrors = getShaderErrors(gl, glVertexShader, 'vertex');
				var fragmentErrors = getShaderErrors(gl, glFragmentShader, 'fragment');
				console.error('THREE.WebGLProgram: shader error: ', gl.getError(), '35715', gl.getProgramParameter(program, 35715), 'gl.getProgramInfoLog', programLog, vertexErrors, fragmentErrors);
			} else if (programLog !== '') {
				console.warn('THREE.WebGLProgram: gl.getProgramInfoLog()', programLog);
			} else if (vertexLog === '' || fragmentLog === '') {
				haveDiagnostics = false;
			}

			if (haveDiagnostics) {
				this.diagnostics = {
					runnable: runnable,
					programLog: programLog,
					vertexShader: {
						log: vertexLog,
						prefix: prefixVertex
					},
					fragmentShader: {
						log: fragmentLog,
						prefix: prefixFragment
					}
				};
			}
		} // Clean up
		// Crashes in iOS9 and iOS10. #18402
		// gl.detachShader( program, glVertexShader );
		// gl.detachShader( program, glFragmentShader );


		gl.deleteShader(glVertexShader);
		gl.deleteShader(glFragmentShader); // set up caching for uniform locations

		var cachedUniforms;

		this.getUniforms = function () {
			if (cachedUniforms === undefined) {
				cachedUniforms = new WebGLUniforms(gl, program);
			}

			return cachedUniforms;
		}; // set up caching for attribute locations


		var cachedAttributes;

		this.getAttributes = function () {
			if (cachedAttributes === undefined) {
				cachedAttributes = fetchAttributeLocations(gl, program);
			}

			return cachedAttributes;
		}; // free resource


		this.destroy = function () {
			bindingStates.releaseStatesOfProgram(this);
			gl.deleteProgram(program);
			this.program = undefined;
		}; //


		this.name = parameters.shaderName;
		this.id = programIdCount++;
		this.cacheKey = cacheKey;
		this.usedTimes = 1;
		this.program = program;
		this.vertexShader = glVertexShader;
		this.fragmentShader = glFragmentShader;
		return this;
	}

	function WebGLPrograms(renderer, cubemaps, extensions, capabilities, bindingStates, clipping) {
		var programs = [];
		var isWebGL2 = capabilities.isWebGL2;
		var logarithmicDepthBuffer = capabilities.logarithmicDepthBuffer;
		var floatVertexTextures = capabilities.floatVertexTextures;
		var maxVertexUniforms = capabilities.maxVertexUniforms;
		var vertexTextures = capabilities.vertexTextures;
		var precision = capabilities.precision;
		var shaderIDs = {
			MeshDepthMaterial: 'depth',
			MeshDistanceMaterial: 'distanceRGBA',
			MeshNormalMaterial: 'normal',
			MeshBasicMaterial: 'basic',
			MeshLambertMaterial: 'lambert',
			MeshPhongMaterial: 'phong',
			MeshToonMaterial: 'toon',
			MeshStandardMaterial: 'physical',
			MeshPhysicalMaterial: 'physical',
			MeshMatcapMaterial: 'matcap',
			LineBasicMaterial: 'basic',
			LineDashedMaterial: 'dashed',
			PointsMaterial: 'points',
			ShadowMaterial: 'shadow',
			SpriteMaterial: 'sprite'
		};
		var parameterNames = ['precision', 'isWebGL2', 'supportsVertexTextures', 'outputEncoding', 'instancing', 'instancingColor', 'map', 'mapEncoding', 'matcap', 'matcapEncoding', 'envMap', 'envMapMode', 'envMapEncoding', 'envMapCubeUV', 'lightMap', 'lightMapEncoding', 'aoMap', 'emissiveMap', 'emissiveMapEncoding', 'bumpMap', 'normalMap', 'objectSpaceNormalMap', 'tangentSpaceNormalMap', 'clearcoatMap', 'clearcoatRoughnessMap', 'clearcoatNormalMap', 'displacementMap', 'specularMap', 'roughnessMap', 'metalnessMap', 'gradientMap', 'alphaMap', 'combine', 'vertexColors', 'vertexTangents', 'vertexUvs', 'uvsVertexOnly', 'fog', 'useFog', 'fogExp2', 'flatShading', 'sizeAttenuation', 'logarithmicDepthBuffer', 'skinning', 'maxBones', 'useVertexTexture', 'morphTargets', 'morphNormals', 'maxMorphTargets', 'maxMorphNormals', 'premultipliedAlpha', 'numDirLights', 'numPointLights', 'numSpotLights', 'numHemiLights', 'numRectAreaLights', 'numDirLightShadows', 'numPointLightShadows', 'numSpotLightShadows', 'shadowMapEnabled', 'shadowMapType', 'toneMapping', 'physicallyCorrectLights', 'alphaTest', 'doubleSided', 'flipSided', 'numClippingPlanes', 'numClipIntersection', 'depthPacking', 'dithering', 'sheen', 'transmissionMap'];

		function getMaxBones(object) {
			var skeleton = object.skeleton;
			var bones = skeleton.bones;

			if (floatVertexTextures) {
				return 1024;
			} else {
				// default for when object is not specified
				// ( for example when prebuilding shader to be used with multiple objects )
				//
				//	- leave some extra space for other uniforms
				//	- limit here is ANGLE's 254 max uniform vectors
				//		(up to 54 should be safe)
				var nVertexUniforms = maxVertexUniforms;
				var nVertexMatrices = Math.floor((nVertexUniforms - 20) / 4);
				var maxBones = Math.min(nVertexMatrices, bones.length);

				if (maxBones < bones.length) {
					console.warn('THREE.WebGLRenderer: Skeleton has ' + bones.length + ' bones. This GPU supports ' + maxBones + '.');
					return 0;
				}

				return maxBones;
			}
		}

		function getTextureEncodingFromMap(map) {
			var encoding;

			if (map && map.isTexture) {
				encoding = map.encoding;
			} else if (map && map.isWebGLRenderTarget) {
				console.warn('THREE.WebGLPrograms.getTextureEncodingFromMap: don\'t use render targets as textures. Use their .texture property instead.');
				encoding = map.texture.encoding;
			} else {
				encoding = LinearEncoding;
			}

			return encoding;
		}

		function getParameters(material, lights, shadows, scene, object) {
			var fog = scene.fog;
			var environment = material.isMeshStandardMaterial ? scene.environment : null;
			var envMap = cubemaps.get(material.envMap || environment);
			var shaderID = shaderIDs[material.type]; // heuristics to create shader parameters according to lights in the scene
			// (not to blow over maxLights budget)

			var maxBones = object.isSkinnedMesh ? getMaxBones(object) : 0;

			if (material.precision !== null) {
				precision = capabilities.getMaxPrecision(material.precision);

				if (precision !== material.precision) {
					console.warn('THREE.WebGLProgram.getParameters:', material.precision, 'not supported, using', precision, 'instead.');
				}
			}

			var vertexShader, fragmentShader;

			if (shaderID) {
				var shader = ShaderLib[shaderID];
				vertexShader = shader.vertexShader;
				fragmentShader = shader.fragmentShader;
			} else {
				vertexShader = material.vertexShader;
				fragmentShader = material.fragmentShader;
			}

			var currentRenderTarget = renderer.getRenderTarget();
			var parameters = {
				isWebGL2: isWebGL2,
				shaderID: shaderID,
				shaderName: material.type,
				vertexShader: vertexShader,
				fragmentShader: fragmentShader,
				defines: material.defines,
				isRawShaderMaterial: material.isRawShaderMaterial === true,
				glslVersion: material.glslVersion,
				precision: precision,
				instancing: object.isInstancedMesh === true,
				instancingColor: object.isInstancedMesh === true && object.instanceColor !== null,
				supportsVertexTextures: vertexTextures,
				outputEncoding: currentRenderTarget !== null ? getTextureEncodingFromMap(currentRenderTarget.texture) : renderer.outputEncoding,
				map: !!material.map,
				mapEncoding: getTextureEncodingFromMap(material.map),
				matcap: !!material.matcap,
				matcapEncoding: getTextureEncodingFromMap(material.matcap),
				envMap: !!envMap,
				envMapMode: envMap && envMap.mapping,
				envMapEncoding: getTextureEncodingFromMap(envMap),
				envMapCubeUV: !!envMap && (envMap.mapping === CubeUVReflectionMapping || envMap.mapping === CubeUVRefractionMapping),
				lightMap: !!material.lightMap,
				lightMapEncoding: getTextureEncodingFromMap(material.lightMap),
				aoMap: !!material.aoMap,
				emissiveMap: !!material.emissiveMap,
				emissiveMapEncoding: getTextureEncodingFromMap(material.emissiveMap),
				bumpMap: !!material.bumpMap,
				normalMap: !!material.normalMap,
				objectSpaceNormalMap: material.normalMapType === ObjectSpaceNormalMap,
				tangentSpaceNormalMap: material.normalMapType === TangentSpaceNormalMap,
				clearcoatMap: !!material.clearcoatMap,
				clearcoatRoughnessMap: !!material.clearcoatRoughnessMap,
				clearcoatNormalMap: !!material.clearcoatNormalMap,
				displacementMap: !!material.displacementMap,
				roughnessMap: !!material.roughnessMap,
				metalnessMap: !!material.metalnessMap,
				specularMap: !!material.specularMap,
				alphaMap: !!material.alphaMap,
				gradientMap: !!material.gradientMap,
				sheen: !!material.sheen,
				transmissionMap: !!material.transmissionMap,
				combine: material.combine,
				vertexTangents: material.normalMap && material.vertexTangents,
				vertexColors: material.vertexColors,
				vertexUvs: !!material.map || !!material.bumpMap || !!material.normalMap || !!material.specularMap || !!material.alphaMap || !!material.emissiveMap || !!material.roughnessMap || !!material.metalnessMap || !!material.clearcoatMap || !!material.clearcoatRoughnessMap || !!material.clearcoatNormalMap || !!material.displacementMap || !!material.transmissionMap,
				uvsVertexOnly: !(!!material.map || !!material.bumpMap || !!material.normalMap || !!material.specularMap || !!material.alphaMap || !!material.emissiveMap || !!material.roughnessMap || !!material.metalnessMap || !!material.clearcoatNormalMap || !!material.transmissionMap) && !!material.displacementMap,
				fog: !!fog,
				useFog: material.fog,
				fogExp2: fog && fog.isFogExp2,
				flatShading: material.flatShading,
				sizeAttenuation: material.sizeAttenuation,
				logarithmicDepthBuffer: logarithmicDepthBuffer,
				skinning: material.skinning && maxBones > 0,
				maxBones: maxBones,
				useVertexTexture: floatVertexTextures,
				morphTargets: material.morphTargets,
				morphNormals: material.morphNormals,
				maxMorphTargets: renderer.maxMorphTargets,
				maxMorphNormals: renderer.maxMorphNormals,
				numDirLights: lights.directional.length,
				numPointLights: lights.point.length,
				numSpotLights: lights.spot.length,
				numRectAreaLights: lights.rectArea.length,
				numHemiLights: lights.hemi.length,
				numDirLightShadows: lights.directionalShadowMap.length,
				numPointLightShadows: lights.pointShadowMap.length,
				numSpotLightShadows: lights.spotShadowMap.length,
				numClippingPlanes: clipping.numPlanes,
				numClipIntersection: clipping.numIntersection,
				dithering: material.dithering,
				shadowMapEnabled: renderer.shadowMap.enabled && shadows.length > 0,
				shadowMapType: renderer.shadowMap.type,
				toneMapping: material.toneMapped ? renderer.toneMapping : NoToneMapping,
				physicallyCorrectLights: renderer.physicallyCorrectLights,
				premultipliedAlpha: material.premultipliedAlpha,
				alphaTest: material.alphaTest,
				doubleSided: material.side === DoubleSide,
				flipSided: material.side === BackSide,
				depthPacking: material.depthPacking !== undefined ? material.depthPacking : false,
				index0AttributeName: material.index0AttributeName,
				extensionDerivatives: material.extensions && material.extensions.derivatives,
				extensionFragDepth: material.extensions && material.extensions.fragDepth,
				extensionDrawBuffers: material.extensions && material.extensions.drawBuffers,
				extensionShaderTextureLOD: material.extensions && material.extensions.shaderTextureLOD,
				rendererExtensionFragDepth: isWebGL2 || extensions.has('EXT_frag_depth'),
				rendererExtensionDrawBuffers: isWebGL2 || extensions.has('WEBGL_draw_buffers'),
				rendererExtensionShaderTextureLod: isWebGL2 || extensions.has('EXT_shader_texture_lod'),
				customProgramCacheKey: material.customProgramCacheKey()
			};
			return parameters;
		}

		function getProgramCacheKey(parameters) {
			var array = [];

			if (parameters.shaderID) {
				array.push(parameters.shaderID);
			} else {
				array.push(parameters.fragmentShader);
				array.push(parameters.vertexShader);
			}

			if (parameters.defines !== undefined) {
				for (var name in parameters.defines) {
					array.push(name);
					array.push(parameters.defines[name]);
				}
			}

			if (parameters.isRawShaderMaterial === false) {
				for (var i = 0; i < parameterNames.length; i++) {
					array.push(parameters[parameterNames[i]]);
				}

				array.push(renderer.outputEncoding);
				array.push(renderer.gammaFactor);
			}

			array.push(parameters.customProgramCacheKey);
			return array.join();
		}

		function getUniforms(material) {
			var shaderID = shaderIDs[material.type];
			var uniforms;

			if (shaderID) {
				var shader = ShaderLib[shaderID];
				uniforms = UniformsUtils.clone(shader.uniforms);
			} else {
				uniforms = material.uniforms;
			}

			return uniforms;
		}

		function acquireProgram(parameters, cacheKey) {
			var program; // Check if code has been already compiled

			for (var p = 0, pl = programs.length; p < pl; p++) {
				var preexistingProgram = programs[p];

				if (preexistingProgram.cacheKey === cacheKey) {
					program = preexistingProgram;
					++program.usedTimes;
					break;
				}
			}

			if (program === undefined) {
				program = new WebGLProgram(renderer, cacheKey, parameters, bindingStates);
				programs.push(program);
			}

			return program;
		}

		function releaseProgram(program) {
			if (--program.usedTimes === 0) {
				// Remove from unordered set
				var i = programs.indexOf(program);
				programs[i] = programs[programs.length - 1];
				programs.pop(); // Free WebGL resources

				program.destroy();
			}
		}

		return {
			getParameters: getParameters,
			getProgramCacheKey: getProgramCacheKey,
			getUniforms: getUniforms,
			acquireProgram: acquireProgram,
			releaseProgram: releaseProgram,
			// Exposed for resource monitoring & error feedback via renderer.info:
			programs: programs
		};
	}

	function WebGLProperties() {
		var properties = new WeakMap();

		function get(object) {
			var map = properties.get(object);

			if (map === undefined) {
				map = {};
				properties.set(object, map);
			}

			return map;
		}

		function remove(object) {
			properties.delete(object);
		}

		function update(object, key, value) {
			properties.get(object)[key] = value;
		}

		function dispose() {
			properties = new WeakMap();
		}

		return {
			get: get,
			remove: remove,
			update: update,
			dispose: dispose
		};
	}

	function painterSortStable(a, b) {
		if (a.groupOrder !== b.groupOrder) {
			return a.groupOrder - b.groupOrder;
		} else if (a.renderOrder !== b.renderOrder) {
			return a.renderOrder - b.renderOrder;
		} else if (a.program !== b.program) {
			return a.program.id - b.program.id;
		} else if (a.material.id !== b.material.id) {
			return a.material.id - b.material.id;
		} else if (a.z !== b.z) {
			return a.z - b.z;
		} else {
			return a.id - b.id;
		}
	}

	function reversePainterSortStable(a, b) {
		if (a.groupOrder !== b.groupOrder) {
			return a.groupOrder - b.groupOrder;
		} else if (a.renderOrder !== b.renderOrder) {
			return a.renderOrder - b.renderOrder;
		} else if (a.z !== b.z) {
			return b.z - a.z;
		} else {
			return a.id - b.id;
		}
	}

	function WebGLRenderList(properties) {
		var renderItems = [];
		var renderItemsIndex = 0;
		var opaque = [];
		var transparent = [];
		var defaultProgram = {
			id: -1
		};

		function init() {
			renderItemsIndex = 0;
			opaque.length = 0;
			transparent.length = 0;
		}

		function getNextRenderItem(object, geometry, material, groupOrder, z, group) {
			var renderItem = renderItems[renderItemsIndex];
			var materialProperties = properties.get(material);

			if (renderItem === undefined) {
				renderItem = {
					id: object.id,
					object: object,
					geometry: geometry,
					material: material,
					program: materialProperties.program || defaultProgram,
					groupOrder: groupOrder,
					renderOrder: object.renderOrder,
					z: z,
					group: group
				};
				renderItems[renderItemsIndex] = renderItem;
			} else {
				renderItem.id = object.id;
				renderItem.object = object;
				renderItem.geometry = geometry;
				renderItem.material = material;
				renderItem.program = materialProperties.program || defaultProgram;
				renderItem.groupOrder = groupOrder;
				renderItem.renderOrder = object.renderOrder;
				renderItem.z = z;
				renderItem.group = group;
			}

			renderItemsIndex++;
			return renderItem;
		}

		function push(object, geometry, material, groupOrder, z, group) {
			var renderItem = getNextRenderItem(object, geometry, material, groupOrder, z, group);
			(material.transparent === true ? transparent : opaque).push(renderItem);
		}

		function unshift(object, geometry, material, groupOrder, z, group) {
			var renderItem = getNextRenderItem(object, geometry, material, groupOrder, z, group);
			(material.transparent === true ? transparent : opaque).unshift(renderItem);
		}

		function sort(customOpaqueSort, customTransparentSort) {
			if (opaque.length > 1) opaque.sort(customOpaqueSort || painterSortStable);
			if (transparent.length > 1) transparent.sort(customTransparentSort || reversePainterSortStable);
		}

		function finish() {
			// Clear references from inactive renderItems in the list
			for (var i = renderItemsIndex, il = renderItems.length; i < il; i++) {
				var renderItem = renderItems[i];
				if (renderItem.id === null) break;
				renderItem.id = null;
				renderItem.object = null;
				renderItem.geometry = null;
				renderItem.material = null;
				renderItem.program = null;
				renderItem.group = null;
			}
		}

		return {
			opaque: opaque,
			transparent: transparent,
			init: init,
			push: push,
			unshift: unshift,
			finish: finish,
			sort: sort
		};
	}

	function WebGLRenderLists(properties) {
		var lists = new WeakMap();

		function get(scene, camera) {
			var cameras = lists.get(scene);
			var list;

			if (cameras === undefined) {
				list = new WebGLRenderList(properties);
				lists.set(scene, new WeakMap());
				lists.get(scene).set(camera, list);
			} else {
				list = cameras.get(camera);

				if (list === undefined) {
					list = new WebGLRenderList(properties);
					cameras.set(camera, list);
				}
			}

			return list;
		}

		function dispose() {
			lists = new WeakMap();
		}

		return {
			get: get,
			dispose: dispose
		};
	}

	function UniformsCache() {
		var lights = {};
		return {
			get: function get(light) {
				if (lights[light.id] !== undefined) {
					return lights[light.id];
				}

				var uniforms;

				switch (light.type) {
					case 'DirectionalLight':
						uniforms = {
							direction: new Vector3(),
							color: new Color()
						};
						break;

					case 'SpotLight':
						uniforms = {
							position: new Vector3(),
							direction: new Vector3(),
							color: new Color(),
							distance: 0,
							coneCos: 0,
							penumbraCos: 0,
							decay: 0
						};
						break;

					case 'PointLight':
						uniforms = {
							position: new Vector3(),
							color: new Color(),
							distance: 0,
							decay: 0
						};
						break;

					case 'HemisphereLight':
						uniforms = {
							direction: new Vector3(),
							skyColor: new Color(),
							groundColor: new Color()
						};
						break;

					case 'RectAreaLight':
						uniforms = {
							color: new Color(),
							position: new Vector3(),
							halfWidth: new Vector3(),
							halfHeight: new Vector3()
						};
						break;
				}

				lights[light.id] = uniforms;
				return uniforms;
			}
		};
	}

	function ShadowUniformsCache() {
		var lights = {};
		return {
			get: function get(light) {
				if (lights[light.id] !== undefined) {
					return lights[light.id];
				}

				var uniforms;

				switch (light.type) {
					case 'DirectionalLight':
						uniforms = {
							shadowBias: 0,
							shadowNormalBias: 0,
							shadowRadius: 1,
							shadowMapSize: new Vector2()
						};
						break;

					case 'SpotLight':
						uniforms = {
							shadowBias: 0,
							shadowNormalBias: 0,
							shadowRadius: 1,
							shadowMapSize: new Vector2()
						};
						break;

					case 'PointLight':
						uniforms = {
							shadowBias: 0,
							shadowNormalBias: 0,
							shadowRadius: 1,
							shadowMapSize: new Vector2(),
							shadowCameraNear: 1,
							shadowCameraFar: 1000
						};
						break;
					// TODO (abelnation): set RectAreaLight shadow uniforms
				}

				lights[light.id] = uniforms;
				return uniforms;
			}
		};
	}

	var nextVersion = 0;

	function shadowCastingLightsFirst(lightA, lightB) {
		return (lightB.castShadow ? 1 : 0) - (lightA.castShadow ? 1 : 0);
	}

	function WebGLLights(extensions, capabilities) {
		var cache = new UniformsCache();
		var shadowCache = ShadowUniformsCache();
		var state = {
			version: 0,
			hash: {
				directionalLength: -1,
				pointLength: -1,
				spotLength: -1,
				rectAreaLength: -1,
				hemiLength: -1,
				numDirectionalShadows: -1,
				numPointShadows: -1,
				numSpotShadows: -1
			},
			ambient: [0, 0, 0],
			probe: [],
			directional: [],
			directionalShadow: [],
			directionalShadowMap: [],
			directionalShadowMatrix: [],
			spot: [],
			spotShadow: [],
			spotShadowMap: [],
			spotShadowMatrix: [],
			rectArea: [],
			rectAreaLTC1: null,
			rectAreaLTC2: null,
			point: [],
			pointShadow: [],
			pointShadowMap: [],
			pointShadowMatrix: [],
			hemi: []
		};

		for (var i = 0; i < 9; i++) {
			state.probe.push(new Vector3());
		}

		var vector3 = new Vector3();
		var matrix4 = new Matrix4();
		var matrix42 = new Matrix4();

		function setup(lights) {
			var r = 0,
					g = 0,
					b = 0;

			for (var _i = 0; _i < 9; _i++) {
				state.probe[_i].set(0, 0, 0);
			}

			var directionalLength = 0;
			var pointLength = 0;
			var spotLength = 0;
			var rectAreaLength = 0;
			var hemiLength = 0;
			var numDirectionalShadows = 0;
			var numPointShadows = 0;
			var numSpotShadows = 0;
			lights.sort(shadowCastingLightsFirst);

			for (var _i2 = 0, l = lights.length; _i2 < l; _i2++) {
				var light = lights[_i2];
				var color = light.color;
				var intensity = light.intensity;
				var distance = light.distance;
				var shadowMap = light.shadow && light.shadow.map ? light.shadow.map.texture : null;

				if (light.isAmbientLight) {
					r += color.r * intensity;
					g += color.g * intensity;
					b += color.b * intensity;
				} else if (light.isLightProbe) {
					for (var j = 0; j < 9; j++) {
						state.probe[j].addScaledVector(light.sh.coefficients[j], intensity);
					}
				} else if (light.isDirectionalLight) {
					var uniforms = cache.get(light);
					uniforms.color.copy(light.color).multiplyScalar(light.intensity);

					if (light.castShadow) {
						var shadow = light.shadow;
						var shadowUniforms = shadowCache.get(light);
						shadowUniforms.shadowBias = shadow.bias;
						shadowUniforms.shadowNormalBias = shadow.normalBias;
						shadowUniforms.shadowRadius = shadow.radius;
						shadowUniforms.shadowMapSize = shadow.mapSize;
						state.directionalShadow[directionalLength] = shadowUniforms;
						state.directionalShadowMap[directionalLength] = shadowMap;
						state.directionalShadowMatrix[directionalLength] = light.shadow.matrix;
						numDirectionalShadows++;
					}

					state.directional[directionalLength] = uniforms;
					directionalLength++;
				} else if (light.isSpotLight) {
					var _uniforms = cache.get(light);

					_uniforms.position.setFromMatrixPosition(light.matrixWorld);

					_uniforms.color.copy(color).multiplyScalar(intensity);

					_uniforms.distance = distance;
					_uniforms.coneCos = Math.cos(light.angle);
					_uniforms.penumbraCos = Math.cos(light.angle * (1 - light.penumbra));
					_uniforms.decay = light.decay;

					if (light.castShadow) {
						var _shadow = light.shadow;

						var _shadowUniforms = shadowCache.get(light);

						_shadowUniforms.shadowBias = _shadow.bias;
						_shadowUniforms.shadowNormalBias = _shadow.normalBias;
						_shadowUniforms.shadowRadius = _shadow.radius;
						_shadowUniforms.shadowMapSize = _shadow.mapSize;
						state.spotShadow[spotLength] = _shadowUniforms;
						state.spotShadowMap[spotLength] = shadowMap;
						state.spotShadowMatrix[spotLength] = light.shadow.matrix;
						numSpotShadows++;
					}

					state.spot[spotLength] = _uniforms;
					spotLength++;
				} else if (light.isRectAreaLight) {
					var _uniforms2 = cache.get(light); // (a) intensity is the total visible light emitted
					//uniforms.color.copy( color ).multiplyScalar( intensity / ( light.width * light.height * Math.PI ) );
					// (b) intensity is the brightness of the light


					_uniforms2.color.copy(color).multiplyScalar(intensity);

					_uniforms2.halfWidth.set(light.width * 0.5, 0.0, 0.0);

					_uniforms2.halfHeight.set(0.0, light.height * 0.5, 0.0);

					state.rectArea[rectAreaLength] = _uniforms2;
					rectAreaLength++;
				} else if (light.isPointLight) {
					var _uniforms3 = cache.get(light);

					_uniforms3.color.copy(light.color).multiplyScalar(light.intensity);

					_uniforms3.distance = light.distance;
					_uniforms3.decay = light.decay;

					if (light.castShadow) {
						var _shadow2 = light.shadow;

						var _shadowUniforms2 = shadowCache.get(light);

						_shadowUniforms2.shadowBias = _shadow2.bias;
						_shadowUniforms2.shadowNormalBias = _shadow2.normalBias;
						_shadowUniforms2.shadowRadius = _shadow2.radius;
						_shadowUniforms2.shadowMapSize = _shadow2.mapSize;
						_shadowUniforms2.shadowCameraNear = _shadow2.camera.near;
						_shadowUniforms2.shadowCameraFar = _shadow2.camera.far;
						state.pointShadow[pointLength] = _shadowUniforms2;
						state.pointShadowMap[pointLength] = shadowMap;
						state.pointShadowMatrix[pointLength] = light.shadow.matrix;
						numPointShadows++;
					}

					state.point[pointLength] = _uniforms3;
					pointLength++;
				} else if (light.isHemisphereLight) {
					var _uniforms4 = cache.get(light);

					_uniforms4.skyColor.copy(light.color).multiplyScalar(intensity);

					_uniforms4.groundColor.copy(light.groundColor).multiplyScalar(intensity);

					state.hemi[hemiLength] = _uniforms4;
					hemiLength++;
				}
			}

			if (rectAreaLength > 0) {
				if (capabilities.isWebGL2) {
					// WebGL 2
					state.rectAreaLTC1 = UniformsLib.LTC_FLOAT_1;
					state.rectAreaLTC2 = UniformsLib.LTC_FLOAT_2;
				} else {
					// WebGL 1
					if (extensions.has('OES_texture_float_linear') === true) {
						state.rectAreaLTC1 = UniformsLib.LTC_FLOAT_1;
						state.rectAreaLTC2 = UniformsLib.LTC_FLOAT_2;
					} else if (extensions.has('OES_texture_half_float_linear') === true) {
						state.rectAreaLTC1 = UniformsLib.LTC_HALF_1;
						state.rectAreaLTC2 = UniformsLib.LTC_HALF_2;
					} else {
						console.error('THREE.WebGLRenderer: Unable to use RectAreaLight. Missing WebGL extensions.');
					}
				}
			}

			state.ambient[0] = r;
			state.ambient[1] = g;
			state.ambient[2] = b;
			var hash = state.hash;

			if (hash.directionalLength !== directionalLength || hash.pointLength !== pointLength || hash.spotLength !== spotLength || hash.rectAreaLength !== rectAreaLength || hash.hemiLength !== hemiLength || hash.numDirectionalShadows !== numDirectionalShadows || hash.numPointShadows !== numPointShadows || hash.numSpotShadows !== numSpotShadows) {
				state.directional.length = directionalLength;
				state.spot.length = spotLength;
				state.rectArea.length = rectAreaLength;
				state.point.length = pointLength;
				state.hemi.length = hemiLength;
				state.directionalShadow.length = numDirectionalShadows;
				state.directionalShadowMap.length = numDirectionalShadows;
				state.pointShadow.length = numPointShadows;
				state.pointShadowMap.length = numPointShadows;
				state.spotShadow.length = numSpotShadows;
				state.spotShadowMap.length = numSpotShadows;
				state.directionalShadowMatrix.length = numDirectionalShadows;
				state.pointShadowMatrix.length = numPointShadows;
				state.spotShadowMatrix.length = numSpotShadows;
				hash.directionalLength = directionalLength;
				hash.pointLength = pointLength;
				hash.spotLength = spotLength;
				hash.rectAreaLength = rectAreaLength;
				hash.hemiLength = hemiLength;
				hash.numDirectionalShadows = numDirectionalShadows;
				hash.numPointShadows = numPointShadows;
				hash.numSpotShadows = numSpotShadows;
				state.version = nextVersion++;
			}
		}

		function setupView(lights, camera) {
			var directionalLength = 0;
			var pointLength = 0;
			var spotLength = 0;
			var rectAreaLength = 0;
			var hemiLength = 0;
			var viewMatrix = camera.matrixWorldInverse;

			for (var _i3 = 0, l = lights.length; _i3 < l; _i3++) {
				var light = lights[_i3];

				if (light.isDirectionalLight) {
					var uniforms = state.directional[directionalLength];
					uniforms.direction.setFromMatrixPosition(light.matrixWorld);
					vector3.setFromMatrixPosition(light.target.matrixWorld);
					uniforms.direction.sub(vector3);
					uniforms.direction.transformDirection(viewMatrix);
					directionalLength++;
				} else if (light.isSpotLight) {
					var _uniforms5 = state.spot[spotLength];

					_uniforms5.position.setFromMatrixPosition(light.matrixWorld);

					_uniforms5.position.applyMatrix4(viewMatrix);

					_uniforms5.direction.setFromMatrixPosition(light.matrixWorld);

					vector3.setFromMatrixPosition(light.target.matrixWorld);

					_uniforms5.direction.sub(vector3);

					_uniforms5.direction.transformDirection(viewMatrix);

					spotLength++;
				} else if (light.isRectAreaLight) {
					var _uniforms6 = state.rectArea[rectAreaLength];

					_uniforms6.position.setFromMatrixPosition(light.matrixWorld);

					_uniforms6.position.applyMatrix4(viewMatrix); // extract local rotation of light to derive width/height half vectors


					matrix42.identity();
					matrix4.copy(light.matrixWorld);
					matrix4.premultiply(viewMatrix);
					matrix42.extractRotation(matrix4);

					_uniforms6.halfWidth.set(light.width * 0.5, 0.0, 0.0);

					_uniforms6.halfHeight.set(0.0, light.height * 0.5, 0.0);

					_uniforms6.halfWidth.applyMatrix4(matrix42);

					_uniforms6.halfHeight.applyMatrix4(matrix42);

					rectAreaLength++;
				} else if (light.isPointLight) {
					var _uniforms7 = state.point[pointLength];

					_uniforms7.position.setFromMatrixPosition(light.matrixWorld);

					_uniforms7.position.applyMatrix4(viewMatrix);

					pointLength++;
				} else if (light.isHemisphereLight) {
					var _uniforms8 = state.hemi[hemiLength];

					_uniforms8.direction.setFromMatrixPosition(light.matrixWorld);

					_uniforms8.direction.transformDirection(viewMatrix);

					_uniforms8.direction.normalize();

					hemiLength++;
				}
			}
		}

		return {
			setup: setup,
			setupView: setupView,
			state: state
		};
	}

	function WebGLRenderState(extensions, capabilities) {
		var lights = new WebGLLights(extensions, capabilities);
		var lightsArray = [];
		var shadowsArray = [];

		function init() {
			lightsArray.length = 0;
			shadowsArray.length = 0;
		}

		function pushLight(light) {
			lightsArray.push(light);
		}

		function pushShadow(shadowLight) {
			shadowsArray.push(shadowLight);
		}

		function setupLights() {
			lights.setup(lightsArray);
		}

		function setupLightsView(camera) {
			lights.setupView(lightsArray, camera);
		}

		var state = {
			lightsArray: lightsArray,
			shadowsArray: shadowsArray,
			lights: lights
		};
		return {
			init: init,
			state: state,
			setupLights: setupLights,
			setupLightsView: setupLightsView,
			pushLight: pushLight,
			pushShadow: pushShadow
		};
	}

	function WebGLRenderStates(extensions, capabilities) {
		var renderStates = new WeakMap();

		function get(scene, renderCallDepth) {
			if (renderCallDepth === void 0) {
				renderCallDepth = 0;
			}

			var renderState;

			if (renderStates.has(scene) === false) {
				renderState = new WebGLRenderState(extensions, capabilities);
				renderStates.set(scene, []);
				renderStates.get(scene).push(renderState);
			} else {
				if (renderCallDepth >= renderStates.get(scene).length) {
					renderState = new WebGLRenderState(extensions, capabilities);
					renderStates.get(scene).push(renderState);
				} else {
					renderState = renderStates.get(scene)[renderCallDepth];
				}
			}

			return renderState;
		}

		function dispose() {
			renderStates = new WeakMap();
		}

		return {
			get: get,
			dispose: dispose
		};
	}

	/**
	 * parameters = {
	 *
	 *	opacity: <float>,
	 *
	 *	map: new THREE.Texture( <Image> ),
	 *
	 *	alphaMap: new THREE.Texture( <Image> ),
	 *
	 *	displacementMap: new THREE.Texture( <Image> ),
	 *	displacementScale: <float>,
	 *	displacementBias: <float>,
	 *
	 *	wireframe: <boolean>,
	 *	wireframeLinewidth: <float>
	 * }
	 */

	function MeshDepthMaterial(parameters) {
		Material.call(this);
		this.type = 'MeshDepthMaterial';
		this.depthPacking = BasicDepthPacking;
		this.skinning = false;
		this.morphTargets = false;
		this.map = null;
		this.alphaMap = null;
		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;
		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.fog = false;
		this.setValues(parameters);
	}

	MeshDepthMaterial.prototype = Object.create(Material.prototype);
	MeshDepthMaterial.prototype.constructor = MeshDepthMaterial;
	MeshDepthMaterial.prototype.isMeshDepthMaterial = true;

	MeshDepthMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.depthPacking = source.depthPacking;
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.map = source.map;
		this.alphaMap = source.alphaMap;
		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		return this;
	};

	/**
	 * parameters = {
	 *
	 *	referencePosition: <float>,
	 *	nearDistance: <float>,
	 *	farDistance: <float>,
	 *
	 *	skinning: <bool>,
	 *	morphTargets: <bool>,
	 *
	 *	map: new THREE.Texture( <Image> ),
	 *
	 *	alphaMap: new THREE.Texture( <Image> ),
	 *
	 *	displacementMap: new THREE.Texture( <Image> ),
	 *	displacementScale: <float>,
	 *	displacementBias: <float>
	 *
	 * }
	 */

	function MeshDistanceMaterial(parameters) {
		Material.call(this);
		this.type = 'MeshDistanceMaterial';
		this.referencePosition = new Vector3();
		this.nearDistance = 1;
		this.farDistance = 1000;
		this.skinning = false;
		this.morphTargets = false;
		this.map = null;
		this.alphaMap = null;
		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;
		this.fog = false;
		this.setValues(parameters);
	}

	MeshDistanceMaterial.prototype = Object.create(Material.prototype);
	MeshDistanceMaterial.prototype.constructor = MeshDistanceMaterial;
	MeshDistanceMaterial.prototype.isMeshDistanceMaterial = true;

	MeshDistanceMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.referencePosition.copy(source.referencePosition);
		this.nearDistance = source.nearDistance;
		this.farDistance = source.farDistance;
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.map = source.map;
		this.alphaMap = source.alphaMap;
		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;
		return this;
	};

	var vsm_frag = "uniform sampler2D shadow_pass;\nuniform vec2 resolution;\nuniform float radius;\n#include <packing>\nvoid main() {\n\tfloat mean = 0.0;\n\tfloat squared_mean = 0.0;\n\tfloat depth = unpackRGBAToDepth( texture2D( shadow_pass, ( gl_FragCoord.xy ) / resolution ) );\n\tfor ( float i = -1.0; i < 1.0 ; i += SAMPLE_RATE) {\n\t\t#ifdef HORIZONTAL_PASS\n\t\t\tvec2 distribution = unpackRGBATo2Half( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( i, 0.0 ) * radius ) / resolution ) );\n\t\t\tmean += distribution.x;\n\t\t\tsquared_mean += distribution.y * distribution.y + distribution.x * distribution.x;\n\t\t#else\n\t\t\tfloat depth = unpackRGBAToDepth( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( 0.0, i ) * radius ) / resolution ) );\n\t\t\tmean += depth;\n\t\t\tsquared_mean += depth * depth;\n\t\t#endif\n\t}\n\tmean = mean * HALF_SAMPLE_RATE;\n\tsquared_mean = squared_mean * HALF_SAMPLE_RATE;\n\tfloat std_dev = sqrt( squared_mean - mean * mean );\n\tgl_FragColor = pack2HalfToRGBA( vec2( mean, std_dev ) );\n}";

	var vsm_vert = "void main() {\n\tgl_Position = vec4( position, 1.0 );\n}";

	function WebGLShadowMap(_renderer, _objects, maxTextureSize) {
		var _frustum = new Frustum();

		var _shadowMapSize = new Vector2(),
				_viewportSize = new Vector2(),
				_viewport = new Vector4(),
				_depthMaterials = [],
				_distanceMaterials = [],
				_materialCache = {};

		var shadowSide = {
			0: BackSide,
			1: FrontSide,
			2: DoubleSide
		};
		var shadowMaterialVertical = new ShaderMaterial({
			defines: {
				SAMPLE_RATE: 2.0 / 8.0,
				HALF_SAMPLE_RATE: 1.0 / 8.0
			},
			uniforms: {
				shadow_pass: {
					value: null
				},
				resolution: {
					value: new Vector2()
				},
				radius: {
					value: 4.0
				}
			},
			vertexShader: vsm_vert,
			fragmentShader: vsm_frag
		});
		var shadowMaterialHorizontal = shadowMaterialVertical.clone();
		shadowMaterialHorizontal.defines.HORIZONTAL_PASS = 1;
		var fullScreenTri = new BufferGeometry();
		fullScreenTri.setAttribute('position', new BufferAttribute(new Float32Array([-1, -1, 0.5, 3, -1, 0.5, -1, 3, 0.5]), 3));
		var fullScreenMesh = new Mesh(fullScreenTri, shadowMaterialVertical);
		var scope = this;
		this.enabled = false;
		this.autoUpdate = true;
		this.needsUpdate = false;
		this.type = PCFShadowMap;

		this.render = function (lights, scene, camera) {
			if (scope.enabled === false) return;
			if (scope.autoUpdate === false && scope.needsUpdate === false) return;
			if (lights.length === 0) return;

			var currentRenderTarget = _renderer.getRenderTarget();

			var activeCubeFace = _renderer.getActiveCubeFace();

			var activeMipmapLevel = _renderer.getActiveMipmapLevel();

			var _state = _renderer.state; // Set GL state for depth map.

			_state.setBlending(NoBlending);

			_state.buffers.color.setClear(1, 1, 1, 1);

			_state.buffers.depth.setTest(true);

			_state.setScissorTest(false); // render depth map


			for (var i = 0, il = lights.length; i < il; i++) {
				var light = lights[i];
				var shadow = light.shadow;

				if (shadow === undefined) {
					console.warn('THREE.WebGLShadowMap:', light, 'has no shadow.');
					continue;
				}

				if (shadow.autoUpdate === false && shadow.needsUpdate === false) continue;

				_shadowMapSize.copy(shadow.mapSize);

				var shadowFrameExtents = shadow.getFrameExtents();

				_shadowMapSize.multiply(shadowFrameExtents);

				_viewportSize.copy(shadow.mapSize);

				if (_shadowMapSize.x > maxTextureSize || _shadowMapSize.y > maxTextureSize) {
					if (_shadowMapSize.x > maxTextureSize) {
						_viewportSize.x = Math.floor(maxTextureSize / shadowFrameExtents.x);
						_shadowMapSize.x = _viewportSize.x * shadowFrameExtents.x;
						shadow.mapSize.x = _viewportSize.x;
					}

					if (_shadowMapSize.y > maxTextureSize) {
						_viewportSize.y = Math.floor(maxTextureSize / shadowFrameExtents.y);
						_shadowMapSize.y = _viewportSize.y * shadowFrameExtents.y;
						shadow.mapSize.y = _viewportSize.y;
					}
				}

				if (shadow.map === null && !shadow.isPointLightShadow && this.type === VSMShadowMap) {
					var pars = {
						minFilter: LinearFilter,
						magFilter: LinearFilter,
						format: RGBAFormat
					};
					shadow.map = new WebGLRenderTarget(_shadowMapSize.x, _shadowMapSize.y, pars);
					shadow.map.texture.name = light.name + '.shadowMap';
					shadow.mapPass = new WebGLRenderTarget(_shadowMapSize.x, _shadowMapSize.y, pars);
					shadow.camera.updateProjectionMatrix();
				}

				if (shadow.map === null) {
					var _pars = {
						minFilter: NearestFilter,
						magFilter: NearestFilter,
						format: RGBAFormat
					};
					shadow.map = new WebGLRenderTarget(_shadowMapSize.x, _shadowMapSize.y, _pars);
					shadow.map.texture.name = light.name + '.shadowMap';
					shadow.camera.updateProjectionMatrix();
				}

				_renderer.setRenderTarget(shadow.map);

				_renderer.clear();

				var viewportCount = shadow.getViewportCount();

				for (var vp = 0; vp < viewportCount; vp++) {
					var viewport = shadow.getViewport(vp);

					_viewport.set(_viewportSize.x * viewport.x, _viewportSize.y * viewport.y, _viewportSize.x * viewport.z, _viewportSize.y * viewport.w);

					_state.viewport(_viewport);

					shadow.updateMatrices(light, vp);
					_frustum = shadow.getFrustum();
					renderObject(scene, camera, shadow.camera, light, this.type);
				} // do blur pass for VSM


				if (!shadow.isPointLightShadow && this.type === VSMShadowMap) {
					VSMPass(shadow, camera);
				}

				shadow.needsUpdate = false;
			}

			scope.needsUpdate = false;

			_renderer.setRenderTarget(currentRenderTarget, activeCubeFace, activeMipmapLevel);
		};

		function VSMPass(shadow, camera) {
			var geometry = _objects.update(fullScreenMesh); // vertical pass


			shadowMaterialVertical.uniforms.shadow_pass.value = shadow.map.texture;
			shadowMaterialVertical.uniforms.resolution.value = shadow.mapSize;
			shadowMaterialVertical.uniforms.radius.value = shadow.radius;

			_renderer.setRenderTarget(shadow.mapPass);

			_renderer.clear();

			_renderer.renderBufferDirect(camera, null, geometry, shadowMaterialVertical, fullScreenMesh, null); // horizontal pass


			shadowMaterialHorizontal.uniforms.shadow_pass.value = shadow.mapPass.texture;
			shadowMaterialHorizontal.uniforms.resolution.value = shadow.mapSize;
			shadowMaterialHorizontal.uniforms.radius.value = shadow.radius;

			_renderer.setRenderTarget(shadow.map);

			_renderer.clear();

			_renderer.renderBufferDirect(camera, null, geometry, shadowMaterialHorizontal, fullScreenMesh, null);
		}

		function getDepthMaterialVariant(useMorphing, useSkinning, useInstancing) {
			var index = useMorphing << 0 | useSkinning << 1 | useInstancing << 2;
			var material = _depthMaterials[index];

			if (material === undefined) {
				material = new MeshDepthMaterial({
					depthPacking: RGBADepthPacking,
					morphTargets: useMorphing,
					skinning: useSkinning
				});
				_depthMaterials[index] = material;
			}

			return material;
		}

		function getDistanceMaterialVariant(useMorphing, useSkinning, useInstancing) {
			var index = useMorphing << 0 | useSkinning << 1 | useInstancing << 2;
			var material = _distanceMaterials[index];

			if (material === undefined) {
				material = new MeshDistanceMaterial({
					morphTargets: useMorphing,
					skinning: useSkinning
				});
				_distanceMaterials[index] = material;
			}

			return material;
		}

		function getDepthMaterial(object, geometry, material, light, shadowCameraNear, shadowCameraFar, type) {
			var result = null;
			var getMaterialVariant = getDepthMaterialVariant;
			var customMaterial = object.customDepthMaterial;

			if (light.isPointLight === true) {
				getMaterialVariant = getDistanceMaterialVariant;
				customMaterial = object.customDistanceMaterial;
			}

			if (customMaterial === undefined) {
				var useMorphing = false;

				if (material.morphTargets === true) {
					useMorphing = geometry.morphAttributes && geometry.morphAttributes.position && geometry.morphAttributes.position.length > 0;
				}

				var useSkinning = false;

				if (object.isSkinnedMesh === true) {
					if (material.skinning === true) {
						useSkinning = true;
					} else {
						console.warn('THREE.WebGLShadowMap: THREE.SkinnedMesh with material.skinning set to false:', object);
					}
				}

				var useInstancing = object.isInstancedMesh === true;
				result = getMaterialVariant(useMorphing, useSkinning, useInstancing);
			} else {
				result = customMaterial;
			}

			if (_renderer.localClippingEnabled && material.clipShadows === true && material.clippingPlanes.length !== 0) {
				// in this case we need a unique material instance reflecting the
				// appropriate state
				var keyA = result.uuid,
						keyB = material.uuid;
				var materialsForVariant = _materialCache[keyA];

				if (materialsForVariant === undefined) {
					materialsForVariant = {};
					_materialCache[keyA] = materialsForVariant;
				}

				var cachedMaterial = materialsForVariant[keyB];

				if (cachedMaterial === undefined) {
					cachedMaterial = result.clone();
					materialsForVariant[keyB] = cachedMaterial;
				}

				result = cachedMaterial;
			}

			result.visible = material.visible;
			result.wireframe = material.wireframe;

			if (type === VSMShadowMap) {
				result.side = material.shadowSide !== null ? material.shadowSide : material.side;
			} else {
				result.side = material.shadowSide !== null ? material.shadowSide : shadowSide[material.side];
			}

			result.clipShadows = material.clipShadows;
			result.clippingPlanes = material.clippingPlanes;
			result.clipIntersection = material.clipIntersection;
			result.wireframeLinewidth = material.wireframeLinewidth;
			result.linewidth = material.linewidth;

			if (light.isPointLight === true && result.isMeshDistanceMaterial === true) {
				result.referencePosition.setFromMatrixPosition(light.matrixWorld);
				result.nearDistance = shadowCameraNear;
				result.farDistance = shadowCameraFar;
			}

			return result;
		}

		function renderObject(object, camera, shadowCamera, light, type) {
			if (object.visible === false) return;
			var visible = object.layers.test(camera.layers);

			if (visible && (object.isMesh || object.isLine || object.isPoints)) {
				if ((object.castShadow || object.receiveShadow && type === VSMShadowMap) && (!object.frustumCulled || _frustum.intersectsObject(object))) {
					object.modelViewMatrix.multiplyMatrices(shadowCamera.matrixWorldInverse, object.matrixWorld);

					var geometry = _objects.update(object);

					var material = object.material;

					if (Array.isArray(material)) {
						var groups = geometry.groups;

						for (var k = 0, kl = groups.length; k < kl; k++) {
							var group = groups[k];
							var groupMaterial = material[group.materialIndex];

							if (groupMaterial && groupMaterial.visible) {
								var depthMaterial = getDepthMaterial(object, geometry, groupMaterial, light, shadowCamera.near, shadowCamera.far, type);

								_renderer.renderBufferDirect(shadowCamera, null, geometry, depthMaterial, object, group);
							}
						}
					} else if (material.visible) {
						var _depthMaterial = getDepthMaterial(object, geometry, material, light, shadowCamera.near, shadowCamera.far, type);

						_renderer.renderBufferDirect(shadowCamera, null, geometry, _depthMaterial, object, null);
					}
				}
			}

			var children = object.children;

			for (var i = 0, l = children.length; i < l; i++) {
				renderObject(children[i], camera, shadowCamera, light, type);
			}
		}
	}

	function WebGLState(gl, extensions, capabilities) {
		var _equationToGL, _factorToGL;

		var isWebGL2 = capabilities.isWebGL2;

		function ColorBuffer() {
			var locked = false;
			var color = new Vector4();
			var currentColorMask = null;
			var currentColorClear = new Vector4(0, 0, 0, 0);
			return {
				setMask: function setMask(colorMask) {
					if (currentColorMask !== colorMask && !locked) {
						gl.colorMask(colorMask, colorMask, colorMask, colorMask);
						currentColorMask = colorMask;
					}
				},
				setLocked: function setLocked(lock) {
					locked = lock;
				},
				setClear: function setClear(r, g, b, a, premultipliedAlpha) {
					if (premultipliedAlpha === true) {
						r *= a;
						g *= a;
						b *= a;
					}

					color.set(r, g, b, a);

					if (currentColorClear.equals(color) === false) {
						gl.clearColor(r, g, b, a);
						currentColorClear.copy(color);
					}
				},
				reset: function reset() {
					locked = false;
					currentColorMask = null;
					currentColorClear.set(-1, 0, 0, 0); // set to invalid state
				}
			};
		}

		function DepthBuffer() {
			var locked = false;
			var currentDepthMask = null;
			var currentDepthFunc = null;
			var currentDepthClear = null;
			return {
				setTest: function setTest(depthTest) {
					if (depthTest) {
						enable(2929);
					} else {
						disable(2929);
					}
				},
				setMask: function setMask(depthMask) {
					if (currentDepthMask !== depthMask && !locked) {
						gl.depthMask(depthMask);
						currentDepthMask = depthMask;
					}
				},
				setFunc: function setFunc(depthFunc) {
					if (currentDepthFunc !== depthFunc) {
						if (depthFunc) {
							switch (depthFunc) {
								case NeverDepth:
									gl.depthFunc(512);
									break;

								case AlwaysDepth:
									gl.depthFunc(519);
									break;

								case LessDepth:
									gl.depthFunc(513);
									break;

								case LessEqualDepth:
									gl.depthFunc(515);
									break;

								case EqualDepth:
									gl.depthFunc(514);
									break;

								case GreaterEqualDepth:
									gl.depthFunc(518);
									break;

								case GreaterDepth:
									gl.depthFunc(516);
									break;

								case NotEqualDepth:
									gl.depthFunc(517);
									break;

								default:
									gl.depthFunc(515);
							}
						} else {
							gl.depthFunc(515);
						}

						currentDepthFunc = depthFunc;
					}
				},
				setLocked: function setLocked(lock) {
					locked = lock;
				},
				setClear: function setClear(depth) {
					if (currentDepthClear !== depth) {
						gl.clearDepth(depth);
						currentDepthClear = depth;
					}
				},
				reset: function reset() {
					locked = false;
					currentDepthMask = null;
					currentDepthFunc = null;
					currentDepthClear = null;
				}
			};
		}

		function StencilBuffer() {
			var locked = false;
			var currentStencilMask = null;
			var currentStencilFunc = null;
			var currentStencilRef = null;
			var currentStencilFuncMask = null;
			var currentStencilFail = null;
			var currentStencilZFail = null;
			var currentStencilZPass = null;
			var currentStencilClear = null;
			return {
				setTest: function setTest(stencilTest) {
					if (!locked) {
						if (stencilTest) {
							enable(2960);
						} else {
							disable(2960);
						}
					}
				},
				setMask: function setMask(stencilMask) {
					if (currentStencilMask !== stencilMask && !locked) {
						gl.stencilMask(stencilMask);
						currentStencilMask = stencilMask;
					}
				},
				setFunc: function setFunc(stencilFunc, stencilRef, stencilMask) {
					if (currentStencilFunc !== stencilFunc || currentStencilRef !== stencilRef || currentStencilFuncMask !== stencilMask) {
						gl.stencilFunc(stencilFunc, stencilRef, stencilMask);
						currentStencilFunc = stencilFunc;
						currentStencilRef = stencilRef;
						currentStencilFuncMask = stencilMask;
					}
				},
				setOp: function setOp(stencilFail, stencilZFail, stencilZPass) {
					if (currentStencilFail !== stencilFail || currentStencilZFail !== stencilZFail || currentStencilZPass !== stencilZPass) {
						gl.stencilOp(stencilFail, stencilZFail, stencilZPass);
						currentStencilFail = stencilFail;
						currentStencilZFail = stencilZFail;
						currentStencilZPass = stencilZPass;
					}
				},
				setLocked: function setLocked(lock) {
					locked = lock;
				},
				setClear: function setClear(stencil) {
					if (currentStencilClear !== stencil) {
						gl.clearStencil(stencil);
						currentStencilClear = stencil;
					}
				},
				reset: function reset() {
					locked = false;
					currentStencilMask = null;
					currentStencilFunc = null;
					currentStencilRef = null;
					currentStencilFuncMask = null;
					currentStencilFail = null;
					currentStencilZFail = null;
					currentStencilZPass = null;
					currentStencilClear = null;
				}
			};
		} //


		var colorBuffer = new ColorBuffer();
		var depthBuffer = new DepthBuffer();
		var stencilBuffer = new StencilBuffer();
		var enabledCapabilities = {};
		var currentProgram = null;
		var currentBlendingEnabled = null;
		var currentBlending = null;
		var currentBlendEquation = null;
		var currentBlendSrc = null;
		var currentBlendDst = null;
		var currentBlendEquationAlpha = null;
		var currentBlendSrcAlpha = null;
		var currentBlendDstAlpha = null;
		var currentPremultipledAlpha = false;
		var currentFlipSided = null;
		var currentCullFace = null;
		var currentLineWidth = null;
		var currentPolygonOffsetFactor = null;
		var currentPolygonOffsetUnits = null;
		var maxTextures = gl.getParameter(35661);
		var lineWidthAvailable = false;
		var version = 0;
		var glVersion = gl.getParameter(7938);

		if (glVersion.indexOf('WebGL') !== -1) {
			version = parseFloat(/^WebGL (\d)/.exec(glVersion)[1]);
			lineWidthAvailable = version >= 1.0;
		} else if (glVersion.indexOf('OpenGL ES') !== -1) {
			version = parseFloat(/^OpenGL ES (\d)/.exec(glVersion)[1]);
			lineWidthAvailable = version >= 2.0;
		}

		var currentTextureSlot = null;
		var currentBoundTextures = {};
		var currentScissor = new Vector4();
		var currentViewport = new Vector4();

		function createTexture(type, target, count) {
			var data = new Uint8Array(4); // 4 is required to match default unpack alignment of 4.

			var texture = gl.createTexture();
			gl.bindTexture(type, texture);
			gl.texParameteri(type, 10241, 9728);
			gl.texParameteri(type, 10240, 9728);

			for (var i = 0; i < count; i++) {
				gl.texImage2D(target + i, 0, 6408, 1, 1, 0, 6408, 5121, data);
			}

			return texture;
		}

		var emptyTextures = {};
		emptyTextures[3553] = createTexture(3553, 3553, 1);
		emptyTextures[34067] = createTexture(34067, 34069, 6); // init

		colorBuffer.setClear(0, 0, 0, 1);
		depthBuffer.setClear(1);
		stencilBuffer.setClear(0);
		enable(2929);
		depthBuffer.setFunc(LessEqualDepth);
		setFlipSided(false);
		setCullFace(CullFaceBack);
		enable(2884);
		setBlending(NoBlending); //

		function enable(id) {
			if (enabledCapabilities[id] !== true) {
				gl.enable(id);
				enabledCapabilities[id] = true;
			}
		}

		function disable(id) {
			if (enabledCapabilities[id] !== false) {
				gl.disable(id);
				enabledCapabilities[id] = false;
			}
		}

		function useProgram(program) {
			if (currentProgram !== program) {
				gl.useProgram(program);
				currentProgram = program;
				return true;
			}

			return false;
		}

		var equationToGL = (_equationToGL = {}, _equationToGL[AddEquation] = 32774, _equationToGL[SubtractEquation] = 32778, _equationToGL[ReverseSubtractEquation] = 32779, _equationToGL);

		if (isWebGL2) {
			equationToGL[MinEquation] = 32775;
			equationToGL[MaxEquation] = 32776;
		} else {
			var extension = extensions.get('EXT_blend_minmax');

			if (extension !== null) {
				equationToGL[MinEquation] = extension.MIN_EXT;
				equationToGL[MaxEquation] = extension.MAX_EXT;
			}
		}

		var factorToGL = (_factorToGL = {}, _factorToGL[ZeroFactor] = 0, _factorToGL[OneFactor] = 1, _factorToGL[SrcColorFactor] = 768, _factorToGL[SrcAlphaFactor] = 770, _factorToGL[SrcAlphaSaturateFactor] = 776, _factorToGL[DstColorFactor] = 774, _factorToGL[DstAlphaFactor] = 772, _factorToGL[OneMinusSrcColorFactor] = 769, _factorToGL[OneMinusSrcAlphaFactor] = 771, _factorToGL[OneMinusDstColorFactor] = 775, _factorToGL[OneMinusDstAlphaFactor] = 773, _factorToGL);

		function setBlending(blending, blendEquation, blendSrc, blendDst, blendEquationAlpha, blendSrcAlpha, blendDstAlpha, premultipliedAlpha) {
			if (blending === NoBlending) {
				if (currentBlendingEnabled) {
					disable(3042);
					currentBlendingEnabled = false;
				}

				return;
			}

			if (!currentBlendingEnabled) {
				enable(3042);
				currentBlendingEnabled = true;
			}

			if (blending !== CustomBlending) {
				if (blending !== currentBlending || premultipliedAlpha !== currentPremultipledAlpha) {
					if (currentBlendEquation !== AddEquation || currentBlendEquationAlpha !== AddEquation) {
						gl.blendEquation(32774);
						currentBlendEquation = AddEquation;
						currentBlendEquationAlpha = AddEquation;
					}

					if (premultipliedAlpha) {
						switch (blending) {
							case NormalBlending:
								gl.blendFuncSeparate(1, 771, 1, 771);
								break;

							case AdditiveBlending:
								gl.blendFunc(1, 1);
								break;

							case SubtractiveBlending:
								gl.blendFuncSeparate(0, 0, 769, 771);
								break;

							case MultiplyBlending:
								gl.blendFuncSeparate(0, 768, 0, 770);
								break;

							default:
								console.error('THREE.WebGLState: Invalid blending: ', blending);
								break;
						}
					} else {
						switch (blending) {
							case NormalBlending:
								gl.blendFuncSeparate(770, 771, 1, 771);
								break;

							case AdditiveBlending:
								gl.blendFunc(770, 1);
								break;

							case SubtractiveBlending:
								gl.blendFunc(0, 769);
								break;

							case MultiplyBlending:
								gl.blendFunc(0, 768);
								break;

							default:
								console.error('THREE.WebGLState: Invalid blending: ', blending);
								break;
						}
					}

					currentBlendSrc = null;
					currentBlendDst = null;
					currentBlendSrcAlpha = null;
					currentBlendDstAlpha = null;
					currentBlending = blending;
					currentPremultipledAlpha = premultipliedAlpha;
				}

				return;
			} // custom blending


			blendEquationAlpha = blendEquationAlpha || blendEquation;
			blendSrcAlpha = blendSrcAlpha || blendSrc;
			blendDstAlpha = blendDstAlpha || blendDst;

			if (blendEquation !== currentBlendEquation || blendEquationAlpha !== currentBlendEquationAlpha) {
				gl.blendEquationSeparate(equationToGL[blendEquation], equationToGL[blendEquationAlpha]);
				currentBlendEquation = blendEquation;
				currentBlendEquationAlpha = blendEquationAlpha;
			}

			if (blendSrc !== currentBlendSrc || blendDst !== currentBlendDst || blendSrcAlpha !== currentBlendSrcAlpha || blendDstAlpha !== currentBlendDstAlpha) {
				gl.blendFuncSeparate(factorToGL[blendSrc], factorToGL[blendDst], factorToGL[blendSrcAlpha], factorToGL[blendDstAlpha]);
				currentBlendSrc = blendSrc;
				currentBlendDst = blendDst;
				currentBlendSrcAlpha = blendSrcAlpha;
				currentBlendDstAlpha = blendDstAlpha;
			}

			currentBlending = blending;
			currentPremultipledAlpha = null;
		}

		function setMaterial(material, frontFaceCW) {
			material.side === DoubleSide ? disable(2884) : enable(2884);
			var flipSided = material.side === BackSide;
			if (frontFaceCW) flipSided = !flipSided;
			setFlipSided(flipSided);
			material.blending === NormalBlending && material.transparent === false ? setBlending(NoBlending) : setBlending(material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha, material.premultipliedAlpha);
			depthBuffer.setFunc(material.depthFunc);
			depthBuffer.setTest(material.depthTest);
			depthBuffer.setMask(material.depthWrite);
			colorBuffer.setMask(material.colorWrite);
			var stencilWrite = material.stencilWrite;
			stencilBuffer.setTest(stencilWrite);

			if (stencilWrite) {
				stencilBuffer.setMask(material.stencilWriteMask);
				stencilBuffer.setFunc(material.stencilFunc, material.stencilRef, material.stencilFuncMask);
				stencilBuffer.setOp(material.stencilFail, material.stencilZFail, material.stencilZPass);
			}

			setPolygonOffset(material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits);
		} //


		function setFlipSided(flipSided) {
			if (currentFlipSided !== flipSided) {
				if (flipSided) {
					gl.frontFace(2304);
				} else {
					gl.frontFace(2305);
				}

				currentFlipSided = flipSided;
			}
		}

		function setCullFace(cullFace) {
			if (cullFace !== CullFaceNone) {
				enable(2884);

				if (cullFace !== currentCullFace) {
					if (cullFace === CullFaceBack) {
						gl.cullFace(1029);
					} else if (cullFace === CullFaceFront) {
						gl.cullFace(1028);
					} else {
						gl.cullFace(1032);
					}
				}
			} else {
				disable(2884);
			}

			currentCullFace = cullFace;
		}

		function setLineWidth(width) {
			if (width !== currentLineWidth) {
				if (lineWidthAvailable) gl.lineWidth(width);
				currentLineWidth = width;
			}
		}

		function setPolygonOffset(polygonOffset, factor, units) {
			if (polygonOffset) {
				enable(32823);

				if (currentPolygonOffsetFactor !== factor || currentPolygonOffsetUnits !== units) {
					gl.polygonOffset(factor, units);
					currentPolygonOffsetFactor = factor;
					currentPolygonOffsetUnits = units;
				}
			} else {
				disable(32823);
			}
		}

		function setScissorTest(scissorTest) {
			if (scissorTest) {
				enable(3089);
			} else {
				disable(3089);
			}
		} // texture


		function activeTexture(webglSlot) {
			if (webglSlot === undefined) webglSlot = 33984 + maxTextures - 1;

			if (currentTextureSlot !== webglSlot) {
				gl.activeTexture(webglSlot);
				currentTextureSlot = webglSlot;
			}
		}

		function bindTexture(webglType, webglTexture) {
			if (currentTextureSlot === null) {
				activeTexture();
			}

			var boundTexture = currentBoundTextures[currentTextureSlot];

			if (boundTexture === undefined) {
				boundTexture = {
					type: undefined,
					texture: undefined
				};
				currentBoundTextures[currentTextureSlot] = boundTexture;
			}

			if (boundTexture.type !== webglType || boundTexture.texture !== webglTexture) {
				gl.bindTexture(webglType, webglTexture || emptyTextures[webglType]);
				boundTexture.type = webglType;
				boundTexture.texture = webglTexture;
			}
		}

		function unbindTexture() {
			var boundTexture = currentBoundTextures[currentTextureSlot];

			if (boundTexture !== undefined && boundTexture.type !== undefined) {
				gl.bindTexture(boundTexture.type, null);
				boundTexture.type = undefined;
				boundTexture.texture = undefined;
			}
		}

		function compressedTexImage2D() {
			try {
				gl.compressedTexImage2D.apply(gl, arguments);
			} catch (error) {
				console.error('THREE.WebGLState:', error);
			}
		}

		function texImage2D() {
			try {
				gl.texImage2D.apply(gl, arguments);
			} catch (error) {
				console.error('THREE.WebGLState:', error);
			}
		}

		function texImage3D() {
			try {
				gl.texImage3D.apply(gl, arguments);
			} catch (error) {
				console.error('THREE.WebGLState:', error);
			}
		} //


		function scissor(scissor) {
			if (currentScissor.equals(scissor) === false) {
				gl.scissor(scissor.x, scissor.y, scissor.z, scissor.w);
				currentScissor.copy(scissor);
			}
		}

		function viewport(viewport) {
			if (currentViewport.equals(viewport) === false) {
				gl.viewport(viewport.x, viewport.y, viewport.z, viewport.w);
				currentViewport.copy(viewport);
			}
		} //


		function reset() {
			enabledCapabilities = {};
			currentTextureSlot = null;
			currentBoundTextures = {};
			currentProgram = null;
			currentBlendingEnabled = null;
			currentBlending = null;
			currentBlendEquation = null;
			currentBlendSrc = null;
			currentBlendDst = null;
			currentBlendEquationAlpha = null;
			currentBlendSrcAlpha = null;
			currentBlendDstAlpha = null;
			currentPremultipledAlpha = false;
			currentFlipSided = null;
			currentCullFace = null;
			currentLineWidth = null;
			currentPolygonOffsetFactor = null;
			currentPolygonOffsetUnits = null;
			colorBuffer.reset();
			depthBuffer.reset();
			stencilBuffer.reset();
		}

		return {
			buffers: {
				color: colorBuffer,
				depth: depthBuffer,
				stencil: stencilBuffer
			},
			enable: enable,
			disable: disable,
			useProgram: useProgram,
			setBlending: setBlending,
			setMaterial: setMaterial,
			setFlipSided: setFlipSided,
			setCullFace: setCullFace,
			setLineWidth: setLineWidth,
			setPolygonOffset: setPolygonOffset,
			setScissorTest: setScissorTest,
			activeTexture: activeTexture,
			bindTexture: bindTexture,
			unbindTexture: unbindTexture,
			compressedTexImage2D: compressedTexImage2D,
			texImage2D: texImage2D,
			texImage3D: texImage3D,
			scissor: scissor,
			viewport: viewport,
			reset: reset
		};
	}

	function WebGLTextures(_gl, extensions, state, properties, capabilities, utils, info) {
		var _wrappingToGL, _filterToGL;

		var isWebGL2 = capabilities.isWebGL2;
		var maxTextures = capabilities.maxTextures;
		var maxCubemapSize = capabilities.maxCubemapSize;
		var maxTextureSize = capabilities.maxTextureSize;
		var maxSamples = capabilities.maxSamples;

		var _videoTextures = new WeakMap();

		var _canvas; // cordova iOS (as of 5.0) still uses UIWebView, which provides OffscreenCanvas,
		// also OffscreenCanvas.getContext("webgl"), but not OffscreenCanvas.getContext("2d")!
		// Some implementations may only implement OffscreenCanvas partially (e.g. lacking 2d).


		var useOffscreenCanvas = false;

		try {
			useOffscreenCanvas = typeof OffscreenCanvas !== 'undefined' && new OffscreenCanvas(1, 1).getContext('2d') !== null;
		} catch (err) {// Ignore any errors
		}

		function createCanvas(width, height) {
			// Use OffscreenCanvas when available. Specially needed in web workers
			return useOffscreenCanvas ? new OffscreenCanvas(width, height) : document.createElementNS('http://www.w3.org/1999/xhtml', 'canvas');
		}

		function resizeImage(image, needsPowerOfTwo, needsNewCanvas, maxSize) {
			var scale = 1; // handle case if texture exceeds max size

			if (image.width > maxSize || image.height > maxSize) {
				scale = maxSize / Math.max(image.width, image.height);
			} // only perform resize if necessary


			if (scale < 1 || needsPowerOfTwo === true) {
				// only perform resize for certain image types
				if (typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement || typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement || typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap) {
					var floor = needsPowerOfTwo ? MathUtils.floorPowerOfTwo : Math.floor;
					var width = floor(scale * image.width);
					var height = floor(scale * image.height);
					if (_canvas === undefined) _canvas = createCanvas(width, height); // cube textures can't reuse the same canvas

					var canvas = needsNewCanvas ? createCanvas(width, height) : _canvas;
					canvas.width = width;
					canvas.height = height;
					var context = canvas.getContext('2d');
					context.drawImage(image, 0, 0, width, height);
					console.warn('THREE.WebGLRenderer: Texture has been resized from (' + image.width + 'x' + image.height + ') to (' + width + 'x' + height + ').');
					return canvas;
				} else {
					if ('data' in image) {
						console.warn('THREE.WebGLRenderer: Image in DataTexture is too big (' + image.width + 'x' + image.height + ').');
					}

					return image;
				}
			}

			return image;
		}

		function isPowerOfTwo(image) {
			return MathUtils.isPowerOfTwo(image.width) && MathUtils.isPowerOfTwo(image.height);
		}

		function textureNeedsPowerOfTwo(texture) {
			if (isWebGL2) return false;
			return texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping || texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter;
		}

		function textureNeedsGenerateMipmaps(texture, supportsMips) {
			return texture.generateMipmaps && supportsMips && texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter;
		}

		function generateMipmap(target, texture, width, height) {
			_gl.generateMipmap(target);

			var textureProperties = properties.get(texture); // Note: Math.log( x ) * Math.LOG2E used instead of Math.log2( x ) which is not supported by IE11

			textureProperties.__maxMipLevel = Math.log(Math.max(width, height)) * Math.LOG2E;
		}

		function getInternalFormat(internalFormatName, glFormat, glType) {
			if (isWebGL2 === false) return glFormat;

			if (internalFormatName !== null) {
				if (_gl[internalFormatName] !== undefined) return _gl[internalFormatName];
				console.warn('THREE.WebGLRenderer: Attempt to use non-existing WebGL internal format \'' + internalFormatName + '\'');
			}

			var internalFormat = glFormat;

			if (glFormat === 6403) {
				if (glType === 5126) internalFormat = 33326;
				if (glType === 5131) internalFormat = 33325;
				if (glType === 5121) internalFormat = 33321;
			}

			if (glFormat === 6407) {
				if (glType === 5126) internalFormat = 34837;
				if (glType === 5131) internalFormat = 34843;
				if (glType === 5121) internalFormat = 32849;
			}

			if (glFormat === 6408) {
				if (glType === 5126) internalFormat = 34836;
				if (glType === 5131) internalFormat = 34842;
				if (glType === 5121) internalFormat = 32856;
			}

			if (internalFormat === 33325 || internalFormat === 33326 || internalFormat === 34842 || internalFormat === 34836) {
				extensions.get('EXT_color_buffer_float');
			}

			return internalFormat;
		} // Fallback filters for non-power-of-2 textures


		function filterFallback(f) {
			if (f === NearestFilter || f === NearestMipmapNearestFilter || f === NearestMipmapLinearFilter) {
				return 9728;
			}

			return 9729;
		} //


		function onTextureDispose(event) {
			var texture = event.target;
			texture.removeEventListener('dispose', onTextureDispose);
			deallocateTexture(texture);

			if (texture.isVideoTexture) {
				_videoTextures.delete(texture);
			}

			info.memory.textures--;
		}

		function onRenderTargetDispose(event) {
			var renderTarget = event.target;
			renderTarget.removeEventListener('dispose', onRenderTargetDispose);
			deallocateRenderTarget(renderTarget);
			info.memory.textures--;
		} //


		function deallocateTexture(texture) {
			var textureProperties = properties.get(texture);
			if (textureProperties.__webglInit === undefined) return;

			_gl.deleteTexture(textureProperties.__webglTexture);

			properties.remove(texture);
		}

		function deallocateRenderTarget(renderTarget) {
			var renderTargetProperties = properties.get(renderTarget);
			var textureProperties = properties.get(renderTarget.texture);
			if (!renderTarget) return;

			if (textureProperties.__webglTexture !== undefined) {
				_gl.deleteTexture(textureProperties.__webglTexture);
			}

			if (renderTarget.depthTexture) {
				renderTarget.depthTexture.dispose();
			}

			if (renderTarget.isWebGLCubeRenderTarget) {
				for (var i = 0; i < 6; i++) {
					_gl.deleteFramebuffer(renderTargetProperties.__webglFramebuffer[i]);

					if (renderTargetProperties.__webglDepthbuffer) _gl.deleteRenderbuffer(renderTargetProperties.__webglDepthbuffer[i]);
				}
			} else {
				_gl.deleteFramebuffer(renderTargetProperties.__webglFramebuffer);

				if (renderTargetProperties.__webglDepthbuffer) _gl.deleteRenderbuffer(renderTargetProperties.__webglDepthbuffer);
				if (renderTargetProperties.__webglMultisampledFramebuffer) _gl.deleteFramebuffer(renderTargetProperties.__webglMultisampledFramebuffer);
				if (renderTargetProperties.__webglColorRenderbuffer) _gl.deleteRenderbuffer(renderTargetProperties.__webglColorRenderbuffer);
				if (renderTargetProperties.__webglDepthRenderbuffer) _gl.deleteRenderbuffer(renderTargetProperties.__webglDepthRenderbuffer);
			}

			properties.remove(renderTarget.texture);
			properties.remove(renderTarget);
		} //


		var textureUnits = 0;

		function resetTextureUnits() {
			textureUnits = 0;
		}

		function allocateTextureUnit() {
			var textureUnit = textureUnits;

			if (textureUnit >= maxTextures) {
				console.warn('THREE.WebGLTextures: Trying to use ' + textureUnit + ' texture units while this GPU supports only ' + maxTextures);
			}

			textureUnits += 1;
			return textureUnit;
		} //


		function setTexture2D(texture, slot) {
			var textureProperties = properties.get(texture);
			if (texture.isVideoTexture) updateVideoTexture(texture);

			if (texture.version > 0 && textureProperties.__version !== texture.version) {
				var image = texture.image;

				if (image === undefined) {
					console.warn('THREE.WebGLRenderer: Texture marked for update but image is undefined');
				} else if (image.complete === false) {
					console.warn('THREE.WebGLRenderer: Texture marked for update but image is incomplete');
				} else {
					uploadTexture(textureProperties, texture, slot);
					return;
				}
			}

			state.activeTexture(33984 + slot);
			state.bindTexture(3553, textureProperties.__webglTexture);
		}

		function setTexture2DArray(texture, slot) {
			var textureProperties = properties.get(texture);

			if (texture.version > 0 && textureProperties.__version !== texture.version) {
				uploadTexture(textureProperties, texture, slot);
				return;
			}

			state.activeTexture(33984 + slot);
			state.bindTexture(35866, textureProperties.__webglTexture);
		}

		function setTexture3D(texture, slot) {
			var textureProperties = properties.get(texture);

			if (texture.version > 0 && textureProperties.__version !== texture.version) {
				uploadTexture(textureProperties, texture, slot);
				return;
			}

			state.activeTexture(33984 + slot);
			state.bindTexture(32879, textureProperties.__webglTexture);
		}

		function setTextureCube(texture, slot) {
			var textureProperties = properties.get(texture);

			if (texture.version > 0 && textureProperties.__version !== texture.version) {
				uploadCubeTexture(textureProperties, texture, slot);
				return;
			}

			state.activeTexture(33984 + slot);
			state.bindTexture(34067, textureProperties.__webglTexture);
		}

		var wrappingToGL = (_wrappingToGL = {}, _wrappingToGL[RepeatWrapping] = 10497, _wrappingToGL[ClampToEdgeWrapping] = 33071, _wrappingToGL[MirroredRepeatWrapping] = 33648, _wrappingToGL);
		var filterToGL = (_filterToGL = {}, _filterToGL[NearestFilter] = 9728, _filterToGL[NearestMipmapNearestFilter] = 9984, _filterToGL[NearestMipmapLinearFilter] = 9986, _filterToGL[LinearFilter] = 9729, _filterToGL[LinearMipmapNearestFilter] = 9985, _filterToGL[LinearMipmapLinearFilter] = 9987, _filterToGL);

		function setTextureParameters(textureType, texture, supportsMips) {
			if (supportsMips) {
				_gl.texParameteri(textureType, 10242, wrappingToGL[texture.wrapS]);

				_gl.texParameteri(textureType, 10243, wrappingToGL[texture.wrapT]);

				if (textureType === 32879 || textureType === 35866) {
					_gl.texParameteri(textureType, 32882, wrappingToGL[texture.wrapR]);
				}

				_gl.texParameteri(textureType, 10240, filterToGL[texture.magFilter]);

				_gl.texParameteri(textureType, 10241, filterToGL[texture.minFilter]);
			} else {
				_gl.texParameteri(textureType, 10242, 33071);

				_gl.texParameteri(textureType, 10243, 33071);

				if (textureType === 32879 || textureType === 35866) {
					_gl.texParameteri(textureType, 32882, 33071);
				}

				if (texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping) {
					console.warn('THREE.WebGLRenderer: Texture is not power of two. Texture.wrapS and Texture.wrapT should be set to THREE.ClampToEdgeWrapping.');
				}

				_gl.texParameteri(textureType, 10240, filterFallback(texture.magFilter));

				_gl.texParameteri(textureType, 10241, filterFallback(texture.minFilter));

				if (texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter) {
					console.warn('THREE.WebGLRenderer: Texture is not power of two. Texture.minFilter should be set to THREE.NearestFilter or THREE.LinearFilter.');
				}
			}

			var extension = extensions.get('EXT_texture_filter_anisotropic');

			if (extension) {
				if (texture.type === FloatType && extensions.get('OES_texture_float_linear') === null) return;
				if (texture.type === HalfFloatType && (isWebGL2 || extensions.get('OES_texture_half_float_linear')) === null) return;

				if (texture.anisotropy > 1 || properties.get(texture).__currentAnisotropy) {
					_gl.texParameterf(textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min(texture.anisotropy, capabilities.getMaxAnisotropy()));

					properties.get(texture).__currentAnisotropy = texture.anisotropy;
				}
			}
		}

		function initTexture(textureProperties, texture) {
			if (textureProperties.__webglInit === undefined) {
				textureProperties.__webglInit = true;
				texture.addEventListener('dispose', onTextureDispose);
				textureProperties.__webglTexture = _gl.createTexture();
				info.memory.textures++;
			}
		}

		function uploadTexture(textureProperties, texture, slot) {
			var textureType = 3553;
			if (texture.isDataTexture2DArray) textureType = 35866;
			if (texture.isDataTexture3D) textureType = 32879;
			initTexture(textureProperties, texture);
			state.activeTexture(33984 + slot);
			state.bindTexture(textureType, textureProperties.__webglTexture);

			_gl.pixelStorei(37440, texture.flipY);

			_gl.pixelStorei(37441, texture.premultiplyAlpha);

			_gl.pixelStorei(3317, texture.unpackAlignment);

			var needsPowerOfTwo = textureNeedsPowerOfTwo(texture) && isPowerOfTwo(texture.image) === false;
			var image = resizeImage(texture.image, needsPowerOfTwo, false, maxTextureSize);
			var supportsMips = isPowerOfTwo(image) || isWebGL2,
					glFormat = utils.convert(texture.format);
			var glType = utils.convert(texture.type),
					glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType);
			setTextureParameters(textureType, texture, supportsMips);
			var mipmap;
			var mipmaps = texture.mipmaps;

			if (texture.isDepthTexture) {
				// populate depth texture with dummy data
				glInternalFormat = 6402;

				if (isWebGL2) {
					if (texture.type === FloatType) {
						glInternalFormat = 36012;
					} else if (texture.type === UnsignedIntType) {
						glInternalFormat = 33190;
					} else if (texture.type === UnsignedInt248Type) {
						glInternalFormat = 35056;
					} else {
						glInternalFormat = 33189; // WebGL2 requires sized internalformat for glTexImage2D
					}
				} else {
					if (texture.type === FloatType) {
						console.error('WebGLRenderer: Floating point depth texture requires WebGL2.');
					}
				} // validation checks for WebGL 1


				if (texture.format === DepthFormat && glInternalFormat === 6402) {
					// The error INVALID_OPERATION is generated by texImage2D if format and internalformat are
					// DEPTH_COMPONENT and type is not UNSIGNED_SHORT or UNSIGNED_INT
					// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)
					if (texture.type !== UnsignedShortType && texture.type !== UnsignedIntType) {
						console.warn('THREE.WebGLRenderer: Use UnsignedShortType or UnsignedIntType for DepthFormat DepthTexture.');
						texture.type = UnsignedShortType;
						glType = utils.convert(texture.type);
					}
				}

				if (texture.format === DepthStencilFormat && glInternalFormat === 6402) {
					// Depth stencil textures need the DEPTH_STENCIL internal format
					// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)
					glInternalFormat = 34041; // The error INVALID_OPERATION is generated by texImage2D if format and internalformat are
					// DEPTH_STENCIL and type is not UNSIGNED_INT_24_8_WEBGL.
					// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)

					if (texture.type !== UnsignedInt248Type) {
						console.warn('THREE.WebGLRenderer: Use UnsignedInt248Type for DepthStencilFormat DepthTexture.');
						texture.type = UnsignedInt248Type;
						glType = utils.convert(texture.type);
					}
				} //


				state.texImage2D(3553, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, null);
			} else if (texture.isDataTexture) {
				// use manually created mipmaps if available
				// if there are no manual mipmaps
				// set 0 level mipmap and then use GL to generate other mipmap levels
				if (mipmaps.length > 0 && supportsMips) {
					for (var i = 0, il = mipmaps.length; i < il; i++) {
						mipmap = mipmaps[i];
						state.texImage2D(3553, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);
					}

					texture.generateMipmaps = false;
					textureProperties.__maxMipLevel = mipmaps.length - 1;
				} else {
					state.texImage2D(3553, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, image.data);
					textureProperties.__maxMipLevel = 0;
				}
			} else if (texture.isCompressedTexture) {
				for (var _i = 0, _il = mipmaps.length; _i < _il; _i++) {
					mipmap = mipmaps[_i];

					if (texture.format !== RGBAFormat && texture.format !== RGBFormat) {
						if (glFormat !== null) {
							state.compressedTexImage2D(3553, _i, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data);
						} else {
							console.warn('THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()');
						}
					} else {
						state.texImage2D(3553, _i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);
					}
				}

				textureProperties.__maxMipLevel = mipmaps.length - 1;
			} else if (texture.isDataTexture2DArray) {
				state.texImage3D(35866, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data);
				textureProperties.__maxMipLevel = 0;
			} else if (texture.isDataTexture3D) {
				state.texImage3D(32879, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data);
				textureProperties.__maxMipLevel = 0;
			} else {
				// regular Texture (image, video, canvas)
				// use manually created mipmaps if available
				// if there are no manual mipmaps
				// set 0 level mipmap and then use GL to generate other mipmap levels
				if (mipmaps.length > 0 && supportsMips) {
					for (var _i2 = 0, _il2 = mipmaps.length; _i2 < _il2; _i2++) {
						mipmap = mipmaps[_i2];
						state.texImage2D(3553, _i2, glInternalFormat, glFormat, glType, mipmap);
					}

					texture.generateMipmaps = false;
					textureProperties.__maxMipLevel = mipmaps.length - 1;
				} else {
					state.texImage2D(3553, 0, glInternalFormat, glFormat, glType, image);
					textureProperties.__maxMipLevel = 0;
				}
			}

			if (textureNeedsGenerateMipmaps(texture, supportsMips)) {
				generateMipmap(textureType, texture, image.width, image.height);
			}

			textureProperties.__version = texture.version;
			if (texture.onUpdate) texture.onUpdate(texture);
		}

		function uploadCubeTexture(textureProperties, texture, slot) {
			if (texture.image.length !== 6) return;
			initTexture(textureProperties, texture);
			state.activeTexture(33984 + slot);
			state.bindTexture(34067, textureProperties.__webglTexture);

			_gl.pixelStorei(37440, texture.flipY);

			_gl.pixelStorei(37441, texture.premultiplyAlpha);

			_gl.pixelStorei(3317, texture.unpackAlignment);

			var isCompressed = texture && (texture.isCompressedTexture || texture.image[0].isCompressedTexture);
			var isDataTexture = texture.image[0] && texture.image[0].isDataTexture;
			var cubeImage = [];

			for (var i = 0; i < 6; i++) {
				if (!isCompressed && !isDataTexture) {
					cubeImage[i] = resizeImage(texture.image[i], false, true, maxCubemapSize);
				} else {
					cubeImage[i] = isDataTexture ? texture.image[i].image : texture.image[i];
				}
			}

			var image = cubeImage[0],
					supportsMips = isPowerOfTwo(image) || isWebGL2,
					glFormat = utils.convert(texture.format),
					glType = utils.convert(texture.type),
					glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType);
			setTextureParameters(34067, texture, supportsMips);
			var mipmaps;

			if (isCompressed) {
				for (var _i3 = 0; _i3 < 6; _i3++) {
					mipmaps = cubeImage[_i3].mipmaps;

					for (var j = 0; j < mipmaps.length; j++) {
						var mipmap = mipmaps[j];

						if (texture.format !== RGBAFormat && texture.format !== RGBFormat) {
							if (glFormat !== null) {
								state.compressedTexImage2D(34069 + _i3, j, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data);
							} else {
								console.warn('THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .setTextureCube()');
							}
						} else {
							state.texImage2D(34069 + _i3, j, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);
						}
					}
				}

				textureProperties.__maxMipLevel = mipmaps.length - 1;
			} else {
				mipmaps = texture.mipmaps;

				for (var _i4 = 0; _i4 < 6; _i4++) {
					if (isDataTexture) {
						state.texImage2D(34069 + _i4, 0, glInternalFormat, cubeImage[_i4].width, cubeImage[_i4].height, 0, glFormat, glType, cubeImage[_i4].data);

						for (var _j = 0; _j < mipmaps.length; _j++) {
							var _mipmap = mipmaps[_j];
							var mipmapImage = _mipmap.image[_i4].image;
							state.texImage2D(34069 + _i4, _j + 1, glInternalFormat, mipmapImage.width, mipmapImage.height, 0, glFormat, glType, mipmapImage.data);
						}
					} else {
						state.texImage2D(34069 + _i4, 0, glInternalFormat, glFormat, glType, cubeImage[_i4]);

						for (var _j2 = 0; _j2 < mipmaps.length; _j2++) {
							var _mipmap2 = mipmaps[_j2];
							state.texImage2D(34069 + _i4, _j2 + 1, glInternalFormat, glFormat, glType, _mipmap2.image[_i4]);
						}
					}
				}

				textureProperties.__maxMipLevel = mipmaps.length;
			}

			if (textureNeedsGenerateMipmaps(texture, supportsMips)) {
				// We assume images for cube map have the same size.
				generateMipmap(34067, texture, image.width, image.height);
			}

			textureProperties.__version = texture.version;
			if (texture.onUpdate) texture.onUpdate(texture);
		} // Render targets
		// Setup storage for target texture and bind it to correct framebuffer


		function setupFrameBufferTexture(framebuffer, renderTarget, attachment, textureTarget) {
			var glFormat = utils.convert(renderTarget.texture.format);
			var glType = utils.convert(renderTarget.texture.type);
			var glInternalFormat = getInternalFormat(renderTarget.texture.internalFormat, glFormat, glType);
			state.texImage2D(textureTarget, 0, glInternalFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null);

			_gl.bindFramebuffer(36160, framebuffer);

			_gl.framebufferTexture2D(36160, attachment, textureTarget, properties.get(renderTarget.texture).__webglTexture, 0);

			_gl.bindFramebuffer(36160, null);
		} // Setup storage for internal depth/stencil buffers and bind to correct framebuffer


		function setupRenderBufferStorage(renderbuffer, renderTarget, isMultisample) {
			_gl.bindRenderbuffer(36161, renderbuffer);

			if (renderTarget.depthBuffer && !renderTarget.stencilBuffer) {
				var glInternalFormat = 33189;

				if (isMultisample) {
					var depthTexture = renderTarget.depthTexture;

					if (depthTexture && depthTexture.isDepthTexture) {
						if (depthTexture.type === FloatType) {
							glInternalFormat = 36012;
						} else if (depthTexture.type === UnsignedIntType) {
							glInternalFormat = 33190;
						}
					}

					var samples = getRenderTargetSamples(renderTarget);

					_gl.renderbufferStorageMultisample(36161, samples, glInternalFormat, renderTarget.width, renderTarget.height);
				} else {
					_gl.renderbufferStorage(36161, glInternalFormat, renderTarget.width, renderTarget.height);
				}

				_gl.framebufferRenderbuffer(36160, 36096, 36161, renderbuffer);
			} else if (renderTarget.depthBuffer && renderTarget.stencilBuffer) {
				if (isMultisample) {
					var _samples = getRenderTargetSamples(renderTarget);

					_gl.renderbufferStorageMultisample(36161, _samples, 35056, renderTarget.width, renderTarget.height);
				} else {
					_gl.renderbufferStorage(36161, 34041, renderTarget.width, renderTarget.height);
				}

				_gl.framebufferRenderbuffer(36160, 33306, 36161, renderbuffer);
			} else {
				var glFormat = utils.convert(renderTarget.texture.format);
				var glType = utils.convert(renderTarget.texture.type);

				var _glInternalFormat = getInternalFormat(renderTarget.texture.internalFormat, glFormat, glType);

				if (isMultisample) {
					var _samples2 = getRenderTargetSamples(renderTarget);

					_gl.renderbufferStorageMultisample(36161, _samples2, _glInternalFormat, renderTarget.width, renderTarget.height);
				} else {
					_gl.renderbufferStorage(36161, _glInternalFormat, renderTarget.width, renderTarget.height);
				}
			}

			_gl.bindRenderbuffer(36161, null);
		} // Setup resources for a Depth Texture for a FBO (needs an extension)


		function setupDepthTexture(framebuffer, renderTarget) {
			var isCube = renderTarget && renderTarget.isWebGLCubeRenderTarget;
			if (isCube) throw new Error('Depth Texture with cube render targets is not supported');

			_gl.bindFramebuffer(36160, framebuffer);

			if (!(renderTarget.depthTexture && renderTarget.depthTexture.isDepthTexture)) {
				throw new Error('renderTarget.depthTexture must be an instance of THREE.DepthTexture');
			} // upload an empty depth texture with framebuffer size


			if (!properties.get(renderTarget.depthTexture).__webglTexture || renderTarget.depthTexture.image.width !== renderTarget.width || renderTarget.depthTexture.image.height !== renderTarget.height) {
				renderTarget.depthTexture.image.width = renderTarget.width;
				renderTarget.depthTexture.image.height = renderTarget.height;
				renderTarget.depthTexture.needsUpdate = true;
			}

			setTexture2D(renderTarget.depthTexture, 0);

			var webglDepthTexture = properties.get(renderTarget.depthTexture).__webglTexture;

			if (renderTarget.depthTexture.format === DepthFormat) {
				_gl.framebufferTexture2D(36160, 36096, 3553, webglDepthTexture, 0);
			} else if (renderTarget.depthTexture.format === DepthStencilFormat) {
				_gl.framebufferTexture2D(36160, 33306, 3553, webglDepthTexture, 0);
			} else {
				throw new Error('Unknown depthTexture format');
			}
		} // Setup GL resources for a non-texture depth buffer


		function setupDepthRenderbuffer(renderTarget) {
			var renderTargetProperties = properties.get(renderTarget);
			var isCube = renderTarget.isWebGLCubeRenderTarget === true;

			if (renderTarget.depthTexture) {
				if (isCube) throw new Error('target.depthTexture not supported in Cube render targets');
				setupDepthTexture(renderTargetProperties.__webglFramebuffer, renderTarget);
			} else {
				if (isCube) {
					renderTargetProperties.__webglDepthbuffer = [];

					for (var i = 0; i < 6; i++) {
						_gl.bindFramebuffer(36160, renderTargetProperties.__webglFramebuffer[i]);

						renderTargetProperties.__webglDepthbuffer[i] = _gl.createRenderbuffer();
						setupRenderBufferStorage(renderTargetProperties.__webglDepthbuffer[i], renderTarget, false);
					}
				} else {
					_gl.bindFramebuffer(36160, renderTargetProperties.__webglFramebuffer);

					renderTargetProperties.__webglDepthbuffer = _gl.createRenderbuffer();
					setupRenderBufferStorage(renderTargetProperties.__webglDepthbuffer, renderTarget, false);
				}
			}

			_gl.bindFramebuffer(36160, null);
		} // Set up GL resources for the render target


		function setupRenderTarget(renderTarget) {
			var renderTargetProperties = properties.get(renderTarget);
			var textureProperties = properties.get(renderTarget.texture);
			renderTarget.addEventListener('dispose', onRenderTargetDispose);
			textureProperties.__webglTexture = _gl.createTexture();
			info.memory.textures++;
			var isCube = renderTarget.isWebGLCubeRenderTarget === true;
			var isMultisample = renderTarget.isWebGLMultisampleRenderTarget === true;
			var supportsMips = isPowerOfTwo(renderTarget) || isWebGL2; // Handles WebGL2 RGBFormat fallback - #18858

			if (isWebGL2 && renderTarget.texture.format === RGBFormat && (renderTarget.texture.type === FloatType || renderTarget.texture.type === HalfFloatType)) {
				renderTarget.texture.format = RGBAFormat;
				console.warn('THREE.WebGLRenderer: Rendering to textures with RGB format is not supported. Using RGBA format instead.');
			} // Setup framebuffer


			if (isCube) {
				renderTargetProperties.__webglFramebuffer = [];

				for (var i = 0; i < 6; i++) {
					renderTargetProperties.__webglFramebuffer[i] = _gl.createFramebuffer();
				}
			} else {
				renderTargetProperties.__webglFramebuffer = _gl.createFramebuffer();

				if (isMultisample) {
					if (isWebGL2) {
						renderTargetProperties.__webglMultisampledFramebuffer = _gl.createFramebuffer();
						renderTargetProperties.__webglColorRenderbuffer = _gl.createRenderbuffer();

						_gl.bindRenderbuffer(36161, renderTargetProperties.__webglColorRenderbuffer);

						var glFormat = utils.convert(renderTarget.texture.format);
						var glType = utils.convert(renderTarget.texture.type);
						var glInternalFormat = getInternalFormat(renderTarget.texture.internalFormat, glFormat, glType);
						var samples = getRenderTargetSamples(renderTarget);

						_gl.renderbufferStorageMultisample(36161, samples, glInternalFormat, renderTarget.width, renderTarget.height);

						_gl.bindFramebuffer(36160, renderTargetProperties.__webglMultisampledFramebuffer);

						_gl.framebufferRenderbuffer(36160, 36064, 36161, renderTargetProperties.__webglColorRenderbuffer);

						_gl.bindRenderbuffer(36161, null);

						if (renderTarget.depthBuffer) {
							renderTargetProperties.__webglDepthRenderbuffer = _gl.createRenderbuffer();
							setupRenderBufferStorage(renderTargetProperties.__webglDepthRenderbuffer, renderTarget, true);
						}

						_gl.bindFramebuffer(36160, null);
					} else {
						console.warn('THREE.WebGLRenderer: WebGLMultisampleRenderTarget can only be used with WebGL2.');
					}
				}
			} // Setup color buffer


			if (isCube) {
				state.bindTexture(34067, textureProperties.__webglTexture);
				setTextureParameters(34067, renderTarget.texture, supportsMips);

				for (var _i5 = 0; _i5 < 6; _i5++) {
					setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer[_i5], renderTarget, 36064, 34069 + _i5);
				}

				if (textureNeedsGenerateMipmaps(renderTarget.texture, supportsMips)) {
					generateMipmap(34067, renderTarget.texture, renderTarget.width, renderTarget.height);
				}

				state.bindTexture(34067, null);
			} else {
				state.bindTexture(3553, textureProperties.__webglTexture);
				setTextureParameters(3553, renderTarget.texture, supportsMips);
				setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer, renderTarget, 36064, 3553);

				if (textureNeedsGenerateMipmaps(renderTarget.texture, supportsMips)) {
					generateMipmap(3553, renderTarget.texture, renderTarget.width, renderTarget.height);
				}

				state.bindTexture(3553, null);
			} // Setup depth and stencil buffers


			if (renderTarget.depthBuffer) {
				setupDepthRenderbuffer(renderTarget);
			}
		}

		function updateRenderTargetMipmap(renderTarget) {
			var texture = renderTarget.texture;
			var supportsMips = isPowerOfTwo(renderTarget) || isWebGL2;

			if (textureNeedsGenerateMipmaps(texture, supportsMips)) {
				var target = renderTarget.isWebGLCubeRenderTarget ? 34067 : 3553;

				var webglTexture = properties.get(texture).__webglTexture;

				state.bindTexture(target, webglTexture);
				generateMipmap(target, texture, renderTarget.width, renderTarget.height);
				state.bindTexture(target, null);
			}
		}

		function updateMultisampleRenderTarget(renderTarget) {
			if (renderTarget.isWebGLMultisampleRenderTarget) {
				if (isWebGL2) {
					var renderTargetProperties = properties.get(renderTarget);

					_gl.bindFramebuffer(36008, renderTargetProperties.__webglMultisampledFramebuffer);

					_gl.bindFramebuffer(36009, renderTargetProperties.__webglFramebuffer);

					var width = renderTarget.width;
					var height = renderTarget.height;
					var mask = 16384;
					if (renderTarget.depthBuffer) mask |= 256;
					if (renderTarget.stencilBuffer) mask |= 1024;

					_gl.blitFramebuffer(0, 0, width, height, 0, 0, width, height, mask, 9728);

					_gl.bindFramebuffer(36160, renderTargetProperties.__webglMultisampledFramebuffer); // see #18905

				} else {
					console.warn('THREE.WebGLRenderer: WebGLMultisampleRenderTarget can only be used with WebGL2.');
				}
			}
		}

		function getRenderTargetSamples(renderTarget) {
			return isWebGL2 && renderTarget.isWebGLMultisampleRenderTarget ? Math.min(maxSamples, renderTarget.samples) : 0;
		}

		function updateVideoTexture(texture) {
			var frame = info.render.frame; // Check the last frame we updated the VideoTexture

			if (_videoTextures.get(texture) !== frame) {
				_videoTextures.set(texture, frame);

				texture.update();
			}
		} // backwards compatibility


		var warnedTexture2D = false;
		var warnedTextureCube = false;

		function safeSetTexture2D(texture, slot) {
			if (texture && texture.isWebGLRenderTarget) {
				if (warnedTexture2D === false) {
					console.warn('THREE.WebGLTextures.safeSetTexture2D: don\'t use render targets as textures. Use their .texture property instead.');
					warnedTexture2D = true;
				}

				texture = texture.texture;
			}

			setTexture2D(texture, slot);
		}

		function safeSetTextureCube(texture, slot) {
			if (texture && texture.isWebGLCubeRenderTarget) {
				if (warnedTextureCube === false) {
					console.warn('THREE.WebGLTextures.safeSetTextureCube: don\'t use cube render targets as textures. Use their .texture property instead.');
					warnedTextureCube = true;
				}

				texture = texture.texture;
			}

			setTextureCube(texture, slot);
		} //


		this.allocateTextureUnit = allocateTextureUnit;
		this.resetTextureUnits = resetTextureUnits;
		this.setTexture2D = setTexture2D;
		this.setTexture2DArray = setTexture2DArray;
		this.setTexture3D = setTexture3D;
		this.setTextureCube = setTextureCube;
		this.setupRenderTarget = setupRenderTarget;
		this.updateRenderTargetMipmap = updateRenderTargetMipmap;
		this.updateMultisampleRenderTarget = updateMultisampleRenderTarget;
		this.safeSetTexture2D = safeSetTexture2D;
		this.safeSetTextureCube = safeSetTextureCube;
	}

	function WebGLUtils(gl, extensions, capabilities) {
		var isWebGL2 = capabilities.isWebGL2;

		function convert(p) {
			var extension;
			if (p === UnsignedByteType) return 5121;
			if (p === UnsignedShort4444Type) return 32819;
			if (p === UnsignedShort5551Type) return 32820;
			if (p === UnsignedShort565Type) return 33635;
			if (p === ByteType) return 5120;
			if (p === ShortType) return 5122;
			if (p === UnsignedShortType) return 5123;
			if (p === IntType) return 5124;
			if (p === UnsignedIntType) return 5125;
			if (p === FloatType) return 5126;

			if (p === HalfFloatType) {
				if (isWebGL2) return 5131;
				extension = extensions.get('OES_texture_half_float');

				if (extension !== null) {
					return extension.HALF_FLOAT_OES;
				} else {
					return null;
				}
			}

			if (p === AlphaFormat) return 6406;
			if (p === RGBFormat) return 6407;
			if (p === RGBAFormat) return 6408;
			if (p === LuminanceFormat) return 6409;
			if (p === LuminanceAlphaFormat) return 6410;
			if (p === DepthFormat) return 6402;
			if (p === DepthStencilFormat) return 34041;
			if (p === RedFormat) return 6403; // WebGL2 formats.

			if (p === RedIntegerFormat) return 36244;
			if (p === RGFormat) return 33319;
			if (p === RGIntegerFormat) return 33320;
			if (p === RGBIntegerFormat) return 36248;
			if (p === RGBAIntegerFormat) return 36249;

			if (p === RGB_S3TC_DXT1_Format || p === RGBA_S3TC_DXT1_Format || p === RGBA_S3TC_DXT3_Format || p === RGBA_S3TC_DXT5_Format) {
				extension = extensions.get('WEBGL_compressed_texture_s3tc');

				if (extension !== null) {
					if (p === RGB_S3TC_DXT1_Format) return extension.COMPRESSED_RGB_S3TC_DXT1_EXT;
					if (p === RGBA_S3TC_DXT1_Format) return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT;
					if (p === RGBA_S3TC_DXT3_Format) return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT;
					if (p === RGBA_S3TC_DXT5_Format) return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT;
				} else {
					return null;
				}
			}

			if (p === RGB_PVRTC_4BPPV1_Format || p === RGB_PVRTC_2BPPV1_Format || p === RGBA_PVRTC_4BPPV1_Format || p === RGBA_PVRTC_2BPPV1_Format) {
				extension = extensions.get('WEBGL_compressed_texture_pvrtc');

				if (extension !== null) {
					if (p === RGB_PVRTC_4BPPV1_Format) return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG;
					if (p === RGB_PVRTC_2BPPV1_Format) return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG;
					if (p === RGBA_PVRTC_4BPPV1_Format) return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;
					if (p === RGBA_PVRTC_2BPPV1_Format) return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;
				} else {
					return null;
				}
			}

			if (p === RGB_ETC1_Format) {
				extension = extensions.get('WEBGL_compressed_texture_etc1');

				if (extension !== null) {
					return extension.COMPRESSED_RGB_ETC1_WEBGL;
				} else {
					return null;
				}
			}

			if (p === RGB_ETC2_Format || p === RGBA_ETC2_EAC_Format) {
				extension = extensions.get('WEBGL_compressed_texture_etc');

				if (extension !== null) {
					if (p === RGB_ETC2_Format) return extension.COMPRESSED_RGB8_ETC2;
					if (p === RGBA_ETC2_EAC_Format) return extension.COMPRESSED_RGBA8_ETC2_EAC;
				}
			}

			if (p === RGBA_ASTC_4x4_Format || p === RGBA_ASTC_5x4_Format || p === RGBA_ASTC_5x5_Format || p === RGBA_ASTC_6x5_Format || p === RGBA_ASTC_6x6_Format || p === RGBA_ASTC_8x5_Format || p === RGBA_ASTC_8x6_Format || p === RGBA_ASTC_8x8_Format || p === RGBA_ASTC_10x5_Format || p === RGBA_ASTC_10x6_Format || p === RGBA_ASTC_10x8_Format || p === RGBA_ASTC_10x10_Format || p === RGBA_ASTC_12x10_Format || p === RGBA_ASTC_12x12_Format || p === SRGB8_ALPHA8_ASTC_4x4_Format || p === SRGB8_ALPHA8_ASTC_5x4_Format || p === SRGB8_ALPHA8_ASTC_5x5_Format || p === SRGB8_ALPHA8_ASTC_6x5_Format || p === SRGB8_ALPHA8_ASTC_6x6_Format || p === SRGB8_ALPHA8_ASTC_8x5_Format || p === SRGB8_ALPHA8_ASTC_8x6_Format || p === SRGB8_ALPHA8_ASTC_8x8_Format || p === SRGB8_ALPHA8_ASTC_10x5_Format || p === SRGB8_ALPHA8_ASTC_10x6_Format || p === SRGB8_ALPHA8_ASTC_10x8_Format || p === SRGB8_ALPHA8_ASTC_10x10_Format || p === SRGB8_ALPHA8_ASTC_12x10_Format || p === SRGB8_ALPHA8_ASTC_12x12_Format) {
				extension = extensions.get('WEBGL_compressed_texture_astc');

				if (extension !== null) {
					// TODO Complete?
					return p;
				} else {
					return null;
				}
			}

			if (p === RGBA_BPTC_Format) {
				extension = extensions.get('EXT_texture_compression_bptc');

				if (extension !== null) {
					// TODO Complete?
					return p;
				} else {
					return null;
				}
			}

			if (p === UnsignedInt248Type) {
				if (isWebGL2) return 34042;
				extension = extensions.get('WEBGL_depth_texture');

				if (extension !== null) {
					return extension.UNSIGNED_INT_24_8_WEBGL;
				} else {
					return null;
				}
			}
		}

		return {
			convert: convert
		};
	}

	function Group() {
		Object3D.call(this);
		this.type = 'Group';
	}

	Group.prototype = Object.assign(Object.create(Object3D.prototype), {
		constructor: Group,
		isGroup: true
	});

	function ArrayCamera(array) {
		if (array === void 0) {
			array = [];
		}

		PerspectiveCamera.call(this);
		this.cameras = array;
	}

	ArrayCamera.prototype = Object.assign(Object.create(PerspectiveCamera.prototype), {
		constructor: ArrayCamera,
		isArrayCamera: true
	});

	/**
	 * @author jsantell / https://www.jsantell.com/
	 * @author mrdoob / http://mrdoob.com/
	 */
	var cameraLPos = new Vector3();
	var cameraRPos = new Vector3();
	/**
	 * Assumes 2 cameras that are parallel and share an X-axis, and that
	 * the cameras' projection and world matrices have already been set.
	 * And that near and far planes are identical for both cameras.
	 * Visualization of this technique: https://computergraphics.stackexchange.com/a/4765
	 */

	function setProjectionFromUnion(camera, cameraL, cameraR) {
		cameraLPos.setFromMatrixPosition(cameraL.matrixWorld);
		cameraRPos.setFromMatrixPosition(cameraR.matrixWorld);
		var ipd = cameraLPos.distanceTo(cameraRPos);
		var projL = cameraL.projectionMatrix.elements;
		var projR = cameraR.projectionMatrix.elements; // VR systems will have identical far and near planes, and
		// most likely identical top and bottom frustum extents.
		// Use the left camera for these values.

		var near = projL[14] / (projL[10] - 1);
		var far = projL[14] / (projL[10] + 1);
		var topFov = (projL[9] + 1) / projL[5];
		var bottomFov = (projL[9] - 1) / projL[5];
		var leftFov = (projL[8] - 1) / projL[0];
		var rightFov = (projR[8] + 1) / projR[0];
		var left = near * leftFov;
		var right = near * rightFov; // Calculate the new camera's position offset from the
		// left camera. xOffset should be roughly half `ipd`.

		var zOffset = ipd / (-leftFov + rightFov);
		var xOffset = zOffset * -leftFov; // TODO: Better way to apply this offset?

		cameraL.matrixWorld.decompose(camera.position, camera.quaternion, camera.scale);
		camera.translateX(xOffset);
		camera.translateZ(zOffset);
		camera.matrixWorld.compose(camera.position, camera.quaternion, camera.scale);
		camera.matrixWorldInverse.getInverse(camera.matrixWorld); // Find the union of the frustum values of the cameras and scale
		// the values so that the near plane's position does not change in world space,
		// although must now be relative to the new union camera.

		var near2 = near + zOffset;
		var far2 = far + zOffset;
		var left2 = left - xOffset;
		var right2 = right + (ipd - xOffset);
		var top2 = topFov * far / far2 * near2;
		var bottom2 = bottomFov * far / far2 * near2;
		camera.projectionMatrix.makePerspective(left2, right2, top2, bottom2, near2, far2);
	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebVRManager(renderer) {
		var renderWidth, renderHeight;
		var scope = this;
		var device = null;
		var frameData = null;
		var poseTarget = null;
		var controllers = [];
		var standingMatrix = new Matrix4();
		var standingMatrixInverse = new Matrix4();
		var framebufferScaleFactor = 1.0;
		var referenceSpaceType = 'local-floor';

		if (typeof window !== 'undefined' && 'VRFrameData' in window) {
			frameData = new window.VRFrameData();
			window.addEventListener('vrdisplaypresentchange', onVRDisplayPresentChange, false);
		}

		var matrixWorldInverse = new Matrix4();
		var tempQuaternion = new Quaternion();
		var tempPosition = new Vector3();
		var cameraL = new PerspectiveCamera();
		cameraL.viewport = new Vector4();
		cameraL.layers.enable(1);
		var cameraR = new PerspectiveCamera();
		cameraR.viewport = new Vector4();
		cameraR.layers.enable(2);
		var cameraVR = new ArrayCamera([cameraL, cameraR]);
		cameraVR.layers.enable(1);
		cameraVR.layers.enable(2);
		var currentSize = new Vector2(),
				currentPixelRatio;

		function onVRDisplayPresentChange() {
			var isPresenting = scope.isPresenting = device !== null && device.isPresenting === true;

			if (isPresenting) {
				var eyeParameters = device.getEyeParameters('left');
				renderWidth = 2 * eyeParameters.renderWidth * framebufferScaleFactor;
				renderHeight = eyeParameters.renderHeight * framebufferScaleFactor;
				currentPixelRatio = renderer.getPixelRatio();
				renderer.getSize(currentSize);
				renderer.setDrawingBufferSize(renderWidth, renderHeight, 1);
				cameraL.viewport.set(0, 0, renderWidth / 2, renderHeight);
				cameraR.viewport.set(renderWidth / 2, 0, renderWidth / 2, renderHeight);
				animation.start();
				scope.dispatchEvent({
					type: 'sessionstart'
				});
			} else {
				if (scope.enabled) {
					renderer.setDrawingBufferSize(currentSize.width, currentSize.height, currentPixelRatio);
				}

				animation.stop();
				scope.dispatchEvent({
					type: 'sessionend'
				});
			}
		} //


		var triggers = [];
		var grips = [];

		function findGamepad(id) {
			var gamepads = navigator.getGamepads && navigator.getGamepads();

			for (var i = 0, l = gamepads.length; i < l; i++) {
				var gamepad = gamepads[i];

				if (gamepad && (gamepad.id === 'Daydream Controller' || gamepad.id === 'Gear VR Controller' || gamepad.id === 'Oculus Go Controller' || gamepad.id === 'OpenVR Gamepad' || gamepad.id.startsWith('Oculus Touch') || gamepad.id.startsWith('HTC Vive Focus') || gamepad.id.startsWith('Spatial Controller'))) {
					var hand = gamepad.hand;
					if (id === 0 && (hand === '' || hand === 'right')) return gamepad;
					if (id === 1 && hand === 'left') return gamepad;
				}
			}
		}

		function updateControllers() {
			for (var i = 0; i < controllers.length; i++) {
				var controller = controllers[i];
				var gamepad = findGamepad(i);

				if (gamepad !== undefined && gamepad.pose !== undefined) {
					if (gamepad.pose === null) return; // Pose

					var pose = gamepad.pose;
					if (pose.hasPosition === false) controller.position.set(0.2, -0.6, -0.05);
					if (pose.position !== null) controller.position.fromArray(pose.position);
					if (pose.orientation !== null) controller.quaternion.fromArray(pose.orientation);
					controller.matrix.compose(controller.position, controller.quaternion, controller.scale);
					controller.matrix.premultiply(standingMatrix);
					controller.matrix.decompose(controller.position, controller.quaternion, controller.scale);
					controller.matrixWorldNeedsUpdate = true;
					controller.visible = true; // Trigger

					var buttonId = gamepad.id === 'Daydream Controller' ? 0 : 1;
					if (triggers[i] === undefined) triggers[i] = false;

					if (triggers[i] !== gamepad.buttons[buttonId].pressed) {
						triggers[i] = gamepad.buttons[buttonId].pressed;

						if (triggers[i] === true) {
							controller.dispatchEvent({
								type: 'selectstart'
							});
						} else {
							controller.dispatchEvent({
								type: 'selectend'
							});
							controller.dispatchEvent({
								type: 'select'
							});
						}
					} // Grip


					buttonId = 2;
					if (grips[i] === undefined) grips[i] = false; // Skip if the grip button doesn't exist on this controller

					if (gamepad.buttons[buttonId] !== undefined) {
						if (grips[i] !== gamepad.buttons[buttonId].pressed) {
							grips[i] = gamepad.buttons[buttonId].pressed;

							if (grips[i] === true) {
								controller.dispatchEvent({
									type: 'squeezestart'
								});
							} else {
								controller.dispatchEvent({
									type: 'squeezeend'
								});
								controller.dispatchEvent({
									type: 'squeeze'
								});
							}
						}
					}
				} else {
					controller.visible = false;
				}
			}
		}

		function updateViewportFromBounds(viewport, bounds) {
			if (bounds !== null && bounds.length === 4) {
				viewport.set(bounds[0] * renderWidth, bounds[1] * renderHeight, bounds[2] * renderWidth, bounds[3] * renderHeight);
			}
		} //


		this.enabled = false;

		this.getController = function (id) {
			var controller = controllers[id];

			if (controller === undefined) {
				controller = new Group();
				controller.matrixAutoUpdate = false;
				controller.visible = false;
				controllers[id] = controller;
			}

			return controller;
		};

		this.getDevice = function () {
			return device;
		};

		this.setDevice = function (value) {
			if (value !== undefined) device = value;
			animation.setContext(value);
		};

		this.setFramebufferScaleFactor = function (value) {
			framebufferScaleFactor = value;
		};

		this.setReferenceSpaceType = function (value) {
			referenceSpaceType = value;
		};

		this.setPoseTarget = function (object) {
			if (object !== undefined) poseTarget = object;
		};

		this.getCamera = function (camera) {
			var userHeight = referenceSpaceType === 'local-floor' ? 1.6 : 0;
			device.depthNear = camera.near;
			device.depthFar = camera.far;
			device.getFrameData(frameData); //

			if (referenceSpaceType === 'local-floor') {
				var stageParameters = device.stageParameters;

				if (stageParameters) {
					standingMatrix.fromArray(stageParameters.sittingToStandingTransform);
				} else {
					standingMatrix.makeTranslation(0, userHeight, 0);
				}
			}

			var pose = frameData.pose;
			var poseObject = poseTarget !== null ? poseTarget : camera; // We want to manipulate poseObject by its position and quaternion components since users may rely on them.

			poseObject.matrix.copy(standingMatrix);
			poseObject.matrix.decompose(poseObject.position, poseObject.quaternion, poseObject.scale);

			if (pose.orientation !== null) {
				tempQuaternion.fromArray(pose.orientation);
				poseObject.quaternion.multiply(tempQuaternion);
			}

			if (pose.position !== null) {
				tempQuaternion.setFromRotationMatrix(standingMatrix);
				tempPosition.fromArray(pose.position);
				tempPosition.applyQuaternion(tempQuaternion);
				poseObject.position.add(tempPosition);
			}

			poseObject.updateMatrixWorld();
			var children = poseObject.children;

			for (var i = 0, l = children.length; i < l; i++) {
				children[i].updateMatrixWorld(true);
			} //


			cameraL.near = camera.near;
			cameraR.near = camera.near;
			cameraL.far = camera.far;
			cameraR.far = camera.far;
			cameraL.matrixWorldInverse.fromArray(frameData.leftViewMatrix);
			cameraR.matrixWorldInverse.fromArray(frameData.rightViewMatrix); // TODO (mrdoob) Double check this code

			standingMatrixInverse.getInverse(standingMatrix);

			if (referenceSpaceType === 'local-floor') {
				cameraL.matrixWorldInverse.multiply(standingMatrixInverse);
				cameraR.matrixWorldInverse.multiply(standingMatrixInverse);
			}

			var parent = poseObject.parent;

			if (parent !== null) {
				matrixWorldInverse.getInverse(parent.matrixWorld);
				cameraL.matrixWorldInverse.multiply(matrixWorldInverse);
				cameraR.matrixWorldInverse.multiply(matrixWorldInverse);
			} // envMap and Mirror needs camera.matrixWorld


			cameraL.matrixWorld.getInverse(cameraL.matrixWorldInverse);
			cameraR.matrixWorld.getInverse(cameraR.matrixWorldInverse);
			cameraL.projectionMatrix.fromArray(frameData.leftProjectionMatrix);
			cameraR.projectionMatrix.fromArray(frameData.rightProjectionMatrix);
			setProjectionFromUnion(cameraVR, cameraL, cameraR); //

			var layers = device.getLayers();

			if (layers.length) {
				var layer = layers[0];
				updateViewportFromBounds(cameraL.viewport, layer.leftBounds);
				updateViewportFromBounds(cameraR.viewport, layer.rightBounds);
			}

			updateControllers();
			return cameraVR;
		};

		this.getStandingMatrix = function () {
			return standingMatrix;
		};

		this.isPresenting = false; // Animation Loop

		var animation = new WebGLAnimation();

		this.setAnimationLoop = function (callback) {
			animation.setAnimationLoop(callback);
			if (this.isPresenting) animation.start();
		};

		this.submitFrame = function () {
			if (this.isPresenting) device.submitFrame();
		};

		this.dispose = function () {
			if (typeof window !== 'undefined') {
				window.removeEventListener('vrdisplaypresentchange', onVRDisplayPresentChange);
			}
		}; // DEPRECATED


		this.setFrameOfReferenceType = function () {
			console.warn('THREE.WebVRManager: setFrameOfReferenceType() has been deprecated.');
		};
	}

	Object.assign(WebVRManager.prototype, EventDispatcher.prototype);

	function WebXRController() {
		this._targetRay = null;
		this._grip = null;
		this._hand = null;
	}

	Object.assign(WebXRController.prototype, {
		constructor: WebXRController,
		getHandSpace: function getHandSpace() {
			if (this._hand === null) {
				this._hand = new Group();
				this._hand.matrixAutoUpdate = false;
				this._hand.visible = false;
				this._hand.joints = {};
				this._hand.inputState = {
					pinching: false
				};
			}

			return this._hand;
		},
		getTargetRaySpace: function getTargetRaySpace() {
			if (this._targetRay === null) {
				this._targetRay = new Group();
				this._targetRay.matrixAutoUpdate = false;
				this._targetRay.visible = false;
			}

			return this._targetRay;
		},
		getGripSpace: function getGripSpace() {
			if (this._grip === null) {
				this._grip = new Group();
				this._grip.matrixAutoUpdate = false;
				this._grip.visible = false;
			}

			return this._grip;
		},
		dispatchEvent: function dispatchEvent(event) {
			if (this._targetRay !== null) {
				this._targetRay.dispatchEvent(event);
			}

			if (this._grip !== null) {
				this._grip.dispatchEvent(event);
			}

			if (this._hand !== null) {
				this._hand.dispatchEvent(event);
			}

			return this;
		},
		disconnect: function disconnect(inputSource) {
			this.dispatchEvent({
				type: 'disconnected',
				data: inputSource
			});

			if (this._targetRay !== null) {
				this._targetRay.visible = false;
			}

			if (this._grip !== null) {
				this._grip.visible = false;
			}

			if (this._hand !== null) {
				this._hand.visible = false;
			}

			return this;
		},
		update: function update(inputSource, frame, referenceSpace) {
			var inputPose = null;
			var gripPose = null;
			var handPose = null;
			var targetRay = this._targetRay;
			var grip = this._grip;
			var hand = this._hand;

			if (inputSource && frame.session.visibilityState !== 'visible-blurred') {
				if (hand && inputSource.hand) {
					handPose = true;

					for (var _iterator = _createForOfIteratorHelperLoose(inputSource.hand.values()), _step; !(_step = _iterator()).done;) {
						var inputjoint = _step.value;
						// Update the joints groups with the XRJoint poses
						var jointPose = frame.getJointPose(inputjoint, referenceSpace);

						if (hand.joints[inputjoint.jointName] === undefined) {
							// The transform of this joint will be updated with the joint pose on each frame
							var _joint = new Group();

							_joint.matrixAutoUpdate = false;
							_joint.visible = false;
							hand.joints[inputjoint.jointName] = _joint; // ??

							hand.add(_joint);
						}

						var joint = hand.joints[inputjoint.jointName];

						if (jointPose !== null) {
							joint.matrix.fromArray(jointPose.transform.matrix);
							joint.matrix.decompose(joint.position, joint.rotation, joint.scale);
							joint.jointRadius = jointPose.radius;
						}

						joint.visible = jointPose !== null;
					} // Custom events
					// Check pinchz


					var indexTip = hand.joints['index-finger-tip'];
					var thumbTip = hand.joints['thumb-tip'];
					var distance = indexTip.position.distanceTo(thumbTip.position);
					var distanceToPinch = 0.02;
					var threshold = 0.005;

					if (hand.inputState.pinching && distance > distanceToPinch + threshold) {
						hand.inputState.pinching = false;
						this.dispatchEvent({
							type: 'pinchend',
							handedness: inputSource.handedness,
							target: this
						});
					} else if (!hand.inputState.pinching && distance <= distanceToPinch - threshold) {
						hand.inputState.pinching = true;
						this.dispatchEvent({
							type: 'pinchstart',
							handedness: inputSource.handedness,
							target: this
						});
					}
				} else {
					if (targetRay !== null) {
						inputPose = frame.getPose(inputSource.targetRaySpace, referenceSpace);

						if (inputPose !== null) {
							targetRay.matrix.fromArray(inputPose.transform.matrix);
							targetRay.matrix.decompose(targetRay.position, targetRay.rotation, targetRay.scale);
						}
					}

					if (grip !== null && inputSource.gripSpace) {
						gripPose = frame.getPose(inputSource.gripSpace, referenceSpace);

						if (gripPose !== null) {
							grip.matrix.fromArray(gripPose.transform.matrix);
							grip.matrix.decompose(grip.position, grip.rotation, grip.scale);
						}
					}
				}
			}

			if (targetRay !== null) {
				targetRay.visible = inputPose !== null;
			}

			if (grip !== null) {
				grip.visible = gripPose !== null;
			}

			if (hand !== null) {
				hand.visible = handPose !== null;
			}

			return this;
		}
	});

	function WebXRManager(renderer, gl) {
		var scope = this;
		var session = null;
		var framebufferScaleFactor = 1.0;
		var referenceSpace = null;
		var referenceSpaceType = 'local-floor';
		var pose = null;
		var poseTarget = null;
		var controllers = [];
		var inputSourcesMap = new Map();
		var layers = [];
		var baseLayer; //

		var cameraL = new PerspectiveCamera();
		cameraL.layers.enable(1);
		cameraL.viewport = new Vector4();
		var cameraR = new PerspectiveCamera();
		cameraR.layers.enable(2);
		cameraR.viewport = new Vector4();
		var cameras = [cameraL, cameraR];
		var cameraVR = new ArrayCamera();
		cameraVR.layers.enable(1);
		cameraVR.layers.enable(2);
		var _currentDepthNear = null;
		var _currentDepthFar = null; //

		this.layersEnabled = false;
		this.enabled = false;
		this.isPresenting = false;

		this.getCameraPose = function () {
			return pose;
		};

		this.getController = function (index) {
			var controller = controllers[index];

			if (controller === undefined) {
				controller = new WebXRController();
				controllers[index] = controller;
			}

			return controller.getTargetRaySpace();
		};

		this.getControllerGrip = function (index) {
			var controller = controllers[index];

			if (controller === undefined) {
				controller = new WebXRController();
				controllers[index] = controller;
			}

			return controller.getGripSpace();
		};

		this.getHand = function (index) {
			var controller = controllers[index];

			if (controller === undefined) {
				controller = new WebXRController();
				controllers[index] = controller;
			}

			return controller.getHandSpace();
		}; //


		function onSessionEvent(event) {
			var controller = inputSourcesMap.get(event.inputSource);

			if (controller) {
				controller.dispatchEvent({
					type: event.type,
					data: event.inputSource
				});
			}
		}

		function onSessionEnd() {
			inputSourcesMap.forEach(function (controller, inputSource) {
				controller.disconnect(inputSource);
			});
			inputSourcesMap.clear();
			_currentDepthNear = null;
			_currentDepthFar = null; //

			renderer.setFramebuffer(null);
			renderer.setRenderTarget(renderer.getRenderTarget()); // Hack #15830

			animation.stop();
			scope.isPresenting = false;
			scope.dispatchEvent({
				type: 'sessionend'
			});
		}

		this.setFramebufferScaleFactor = function (value) {
			framebufferScaleFactor = value;

			if (scope.isPresenting === true) {
				console.warn('THREE.WebXRManager: Cannot change framebuffer scale while presenting.');
			}
		};

		this.setReferenceSpaceType = function (value) {
			referenceSpaceType = value;

			if (scope.isPresenting === true) {
				console.warn('THREE.WebXRManager: Cannot change reference space type while presenting.');
			}
		};

		this.getReferenceSpace = function () {
			return referenceSpace;
		};

		this.getSession = function () {
			return session;
		};

		this.setSession = /*#__PURE__*/function () {
			var _ref = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee(value) {
				var attributes, layerInit;
				return regeneratorRuntime.wrap(function _callee$(_context) {
					while (1) {
						switch (_context.prev = _context.next) {
							case 0:
								session = value;

								if (!(session !== null)) {
									_context.next = 24;
									break;
								}

								session.addEventListener('select', onSessionEvent);
								session.addEventListener('selectstart', onSessionEvent);
								session.addEventListener('selectend', onSessionEvent);
								session.addEventListener('squeeze', onSessionEvent);
								session.addEventListener('squeezestart', onSessionEvent);
								session.addEventListener('squeezeend', onSessionEvent);
								session.addEventListener('end', onSessionEnd);
								session.addEventListener('inputsourceschange', onInputSourcesChange);
								attributes = gl.getContextAttributes();

								if (!(attributes.xrCompatible !== true)) {
									_context.next = 14;
									break;
								}

								_context.next = 14;
								return gl.makeXRCompatible();

							case 14:
								layerInit = {
									antialias: attributes.antialias,
									alpha: attributes.alpha,
									depth: attributes.depth,
									stencil: attributes.stencil,
									framebufferScaleFactor: framebufferScaleFactor
								}; // eslint-disable-next-line no-undef

								baseLayer = new XRWebGLLayer(session, gl, layerInit);

								if (window.XRWebGLBinding && this.layersEnabled) {
									this.addLayer(baseLayer);
								} else {
									session.updateRenderState({
										baseLayer: baseLayer
									});
								}

								_context.next = 19;
								return session.requestReferenceSpace(referenceSpaceType);

							case 19:
								referenceSpace = _context.sent;
								animation.setContext(session);
								animation.start();
								scope.isPresenting = true;
								scope.dispatchEvent({
									type: 'sessionstart'
								});

							case 24:
							case "end":
								return _context.stop();
						}
					}
				}, _callee, this);
			}));

			return function (_x) {
				return _ref.apply(this, arguments);
			};
		}();

		this.addLayer = function (layer) {
			if (!window.XRWebGLBinding || !this.layersEnabled || !session) {
				return;
			}

			layers.push(layer);
			session.updateRenderState({
				layers: layers
			});
		};

		this.removeLayer = function (layer) {
			if (!window.XRWebGLBinding || !this.layersEnabled || !session) {
				return;
			}

			layers.splice(layers.indexOf(layer), 1);
			session.updateRenderState({
				layers: layers
			});
		};

		function onInputSourcesChange(event) {
			var inputSources = session.inputSources; // Assign inputSources to available controllers

			for (var i = 0; i < controllers.length; i++) {
				inputSourcesMap.set(inputSources[i], controllers[i]);
			} // Notify disconnected


			for (var _i = 0; _i < event.removed.length; _i++) {
				var inputSource = event.removed[_i];
				var controller = inputSourcesMap.get(inputSource);

				if (controller) {
					controller.dispatchEvent({
						type: 'disconnected',
						data: inputSource
					});
					inputSourcesMap.delete(inputSource);
				}
			} // Notify connected


			for (var _i2 = 0; _i2 < event.added.length; _i2++) {
				var _inputSource = event.added[_i2];

				var _controller = inputSourcesMap.get(_inputSource);

				if (_controller) {
					_controller.dispatchEvent({
						type: 'connected',
						data: _inputSource
					});
				}
			}
		} //


		var cameraLPos = new Vector3();
		var cameraRPos = new Vector3();
		/**
		 * Assumes 2 cameras that are parallel and share an X-axis, and that
		 * the cameras' projection and world matrices have already been set.
		 * And that near and far planes are identical for both cameras.
		 * Visualization of this technique: https://computergraphics.stackexchange.com/a/4765
		 */

		function setProjectionFromUnion(camera, cameraL, cameraR) {
			cameraLPos.setFromMatrixPosition(cameraL.matrixWorld);
			cameraRPos.setFromMatrixPosition(cameraR.matrixWorld);
			var ipd = cameraLPos.distanceTo(cameraRPos);
			var projL = cameraL.projectionMatrix.elements;
			var projR = cameraR.projectionMatrix.elements; // VR systems will have identical far and near planes, and
			// most likely identical top and bottom frustum extents.
			// Use the left camera for these values.

			var near = projL[14] / (projL[10] - 1);
			var far = projL[14] / (projL[10] + 1);
			var topFov = (projL[9] + 1) / projL[5];
			var bottomFov = (projL[9] - 1) / projL[5];
			var leftFov = (projL[8] - 1) / projL[0];
			var rightFov = (projR[8] + 1) / projR[0];
			var left = near * leftFov;
			var right = near * rightFov; // Calculate the new camera's position offset from the
			// left camera. xOffset should be roughly half `ipd`.

			var zOffset = ipd / (-leftFov + rightFov);
			var xOffset = zOffset * -leftFov; // TODO: Better way to apply this offset?

			cameraL.matrixWorld.decompose(camera.position, camera.quaternion, camera.scale);
			camera.translateX(xOffset);
			camera.translateZ(zOffset);
			camera.matrixWorld.compose(camera.position, camera.quaternion, camera.scale);
			camera.matrixWorldInverse.copy(camera.matrixWorld).invert(); // Find the union of the frustum values of the cameras and scale
			// the values so that the near plane's position does not change in world space,
			// although must now be relative to the new union camera.

			var near2 = near + zOffset;
			var far2 = far + zOffset;
			var left2 = left - xOffset;
			var right2 = right + (ipd - xOffset);
			var top2 = topFov * far / far2 * near2;
			var bottom2 = bottomFov * far / far2 * near2;
			camera.projectionMatrix.makePerspective(left2, right2, top2, bottom2, near2, far2);
		}

		function updateCamera(camera, parent) {
			if (parent === null) {
				camera.matrixWorld.copy(camera.matrix);
			} else {
				camera.matrixWorld.multiplyMatrices(parent.matrixWorld, camera.matrix);
			}

			camera.matrixWorldInverse.copy(camera.matrixWorld).invert();
		}

		this.setPoseTarget = function (object) {
			if (object !== undefined) poseTarget = object;
		};

		this.getCamera = function (camera) {
			cameraVR.near = cameraR.near = cameraL.near = camera.near;
			cameraVR.far = cameraR.far = cameraL.far = camera.far;

			if (_currentDepthNear !== cameraVR.near || _currentDepthFar !== cameraVR.far) {
				// Note that the new renderState won't apply until the next frame. See #18320
				session.updateRenderState({
					depthNear: cameraVR.near,
					depthFar: cameraVR.far
				});
				_currentDepthNear = cameraVR.near;
				_currentDepthFar = cameraVR.far;
			}

			var parent = camera.parent;
			var cameras = cameraVR.cameras;
			var object = poseTarget || camera;
			updateCamera(cameraVR, parent);

			for (var i = 0; i < cameras.length; i++) {
				updateCamera(cameras[i], parent);
			} // update camera and its children


			object.matrixWorld.copy(cameraVR.matrixWorld);
			var children = object.children;

			for (var _i3 = 0, l = children.length; _i3 < l; _i3++) {
				children[_i3].updateMatrixWorld(true);
			} // update projection matrix for proper view frustum culling


			if (cameras.length === 2) {
				setProjectionFromUnion(cameraVR, cameraL, cameraR);
			} else {
				// assume single camera setup (AR)
				cameraVR.projectionMatrix.copy(cameraL.projectionMatrix);
			}

			return cameraVR;
		}; // Animation Loop


		var onAnimationFrameCallback = null;

		function onAnimationFrame(time, frame) {
			pose = frame.getViewerPose(referenceSpace);

			if (pose !== null) {
				var views = pose.views;
				renderer.setFramebuffer(baseLayer.framebuffer);
				var cameraVRNeedsUpdate = false; // check if it's necessary to rebuild cameraVR's camera list

				if (views.length !== cameraVR.cameras.length) {
					cameraVR.cameras.length = 0;
					cameraVRNeedsUpdate = true;
				}

				for (var i = 0; i < views.length; i++) {
					var view = views[i];
					var viewport = baseLayer.getViewport(view);
					var camera = cameras[i];
					camera.matrix.fromArray(view.transform.matrix);
					camera.projectionMatrix.fromArray(view.projectionMatrix);
					camera.viewport.set(viewport.x, viewport.y, viewport.width, viewport.height);

					if (i === 0) {
						cameraVR.matrix.copy(camera.matrix);
					}

					if (cameraVRNeedsUpdate === true) {
						cameraVR.cameras.push(camera);
					}
				}
			} //


			var inputSources = session.inputSources;

			for (var _i4 = 0; _i4 < controllers.length; _i4++) {
				var controller = controllers[_i4];
				var inputSource = inputSources[_i4];
				controller.update(inputSource, frame, referenceSpace);
			}

			if (onAnimationFrameCallback) onAnimationFrameCallback(time, frame);
		}

		var animation = new WebGLAnimation();
		animation.setAnimationLoop(onAnimationFrame);

		this.setAnimationLoop = function (callback) {
			onAnimationFrameCallback = callback;
		};

		this.dispose = function () {};
	}

	Object.assign(WebXRManager.prototype, EventDispatcher.prototype);

	function WebGLMaterials(properties) {
		function refreshFogUniforms(uniforms, fog) {
			uniforms.fogColor.value.copy(fog.color);

			if (fog.isFog) {
				uniforms.fogNear.value = fog.near;
				uniforms.fogFar.value = fog.far;
			} else if (fog.isFogExp2) {
				uniforms.fogDensity.value = fog.density;
			}
		}

		function refreshMaterialUniforms(uniforms, material, pixelRatio, height) {
			if (material.isMeshBasicMaterial) {
				refreshUniformsCommon(uniforms, material);
			} else if (material.isMeshLambertMaterial) {
				refreshUniformsCommon(uniforms, material);
				refreshUniformsLambert(uniforms, material);
			} else if (material.isMeshToonMaterial) {
				refreshUniformsCommon(uniforms, material);
				refreshUniformsToon(uniforms, material);
			} else if (material.isMeshPhongMaterial) {
				refreshUniformsCommon(uniforms, material);
				refreshUniformsPhong(uniforms, material);
			} else if (material.isMeshStandardMaterial) {
				refreshUniformsCommon(uniforms, material);

				if (material.isMeshPhysicalMaterial) {
					refreshUniformsPhysical(uniforms, material);
				} else {
					refreshUniformsStandard(uniforms, material);
				}
			} else if (material.isMeshMatcapMaterial) {
				refreshUniformsCommon(uniforms, material);
				refreshUniformsMatcap(uniforms, material);
			} else if (material.isMeshDepthMaterial) {
				refreshUniformsCommon(uniforms, material);
				refreshUniformsDepth(uniforms, material);
			} else if (material.isMeshDistanceMaterial) {
				refreshUniformsCommon(uniforms, material);
				refreshUniformsDistance(uniforms, material);
			} else if (material.isMeshNormalMaterial) {
				refreshUniformsCommon(uniforms, material);
				refreshUniformsNormal(uniforms, material);
			} else if (material.isLineBasicMaterial) {
				refreshUniformsLine(uniforms, material);

				if (material.isLineDashedMaterial) {
					refreshUniformsDash(uniforms, material);
				}
			} else if (material.isPointsMaterial) {
				refreshUniformsPoints(uniforms, material, pixelRatio, height);
			} else if (material.isSpriteMaterial) {
				refreshUniformsSprites(uniforms, material);
			} else if (material.isShadowMaterial) {
				uniforms.color.value.copy(material.color);
				uniforms.opacity.value = material.opacity;
			} else if (material.isShaderMaterial) {
				material.uniformsNeedUpdate = false; // #15581
			}
		}

		function refreshUniformsCommon(uniforms, material) {
			uniforms.opacity.value = material.opacity;

			if (material.color) {
				uniforms.diffuse.value.copy(material.color);
			}

			if (material.emissive) {
				uniforms.emissive.value.copy(material.emissive).multiplyScalar(material.emissiveIntensity);
			}

			if (material.map) {
				uniforms.map.value = material.map;
			}

			if (material.alphaMap) {
				uniforms.alphaMap.value = material.alphaMap;
			}

			if (material.specularMap) {
				uniforms.specularMap.value = material.specularMap;
			}

			var envMap = properties.get(material).envMap;

			if (envMap) {
				uniforms.envMap.value = envMap;
				uniforms.flipEnvMap.value = envMap.isCubeTexture && envMap._needsFlipEnvMap ? -1 : 1;
				uniforms.reflectivity.value = material.reflectivity;
				uniforms.refractionRatio.value = material.refractionRatio;

				var maxMipLevel = properties.get(envMap).__maxMipLevel;

				if (maxMipLevel !== undefined) {
					uniforms.maxMipLevel.value = maxMipLevel;
				}
			}

			if (material.lightMap) {
				uniforms.lightMap.value = material.lightMap;
				uniforms.lightMapIntensity.value = material.lightMapIntensity;
			}

			if (material.aoMap) {
				uniforms.aoMap.value = material.aoMap;
				uniforms.aoMapIntensity.value = material.aoMapIntensity;
			} // uv repeat and offset setting priorities
			// 1. color map
			// 2. specular map
			// 3. displacementMap map
			// 4. normal map
			// 5. bump map
			// 6. roughnessMap map
			// 7. metalnessMap map
			// 8. alphaMap map
			// 9. emissiveMap map
			// 10. clearcoat map
			// 11. clearcoat normal map
			// 12. clearcoat roughnessMap map


			var uvScaleMap;

			if (material.map) {
				uvScaleMap = material.map;
			} else if (material.specularMap) {
				uvScaleMap = material.specularMap;
			} else if (material.displacementMap) {
				uvScaleMap = material.displacementMap;
			} else if (material.normalMap) {
				uvScaleMap = material.normalMap;
			} else if (material.bumpMap) {
				uvScaleMap = material.bumpMap;
			} else if (material.roughnessMap) {
				uvScaleMap = material.roughnessMap;
			} else if (material.metalnessMap) {
				uvScaleMap = material.metalnessMap;
			} else if (material.alphaMap) {
				uvScaleMap = material.alphaMap;
			} else if (material.emissiveMap) {
				uvScaleMap = material.emissiveMap;
			} else if (material.clearcoatMap) {
				uvScaleMap = material.clearcoatMap;
			} else if (material.clearcoatNormalMap) {
				uvScaleMap = material.clearcoatNormalMap;
			} else if (material.clearcoatRoughnessMap) {
				uvScaleMap = material.clearcoatRoughnessMap;
			}

			if (uvScaleMap !== undefined) {
				// backwards compatibility
				if (uvScaleMap.isWebGLRenderTarget) {
					uvScaleMap = uvScaleMap.texture;
				}

				if (uvScaleMap.matrixAutoUpdate === true) {
					uvScaleMap.updateMatrix();
				}

				uniforms.uvTransform.value.copy(uvScaleMap.matrix);
			} // uv repeat and offset setting priorities for uv2
			// 1. ao map
			// 2. light map


			var uv2ScaleMap;

			if (material.aoMap) {
				uv2ScaleMap = material.aoMap;
			} else if (material.lightMap) {
				uv2ScaleMap = material.lightMap;
			}

			if (uv2ScaleMap !== undefined) {
				// backwards compatibility
				if (uv2ScaleMap.isWebGLRenderTarget) {
					uv2ScaleMap = uv2ScaleMap.texture;
				}

				if (uv2ScaleMap.matrixAutoUpdate === true) {
					uv2ScaleMap.updateMatrix();
				}

				uniforms.uv2Transform.value.copy(uv2ScaleMap.matrix);
			}
		}

		function refreshUniformsLine(uniforms, material) {
			uniforms.diffuse.value.copy(material.color);
			uniforms.opacity.value = material.opacity;
		}

		function refreshUniformsDash(uniforms, material) {
			uniforms.dashSize.value = material.dashSize;
			uniforms.totalSize.value = material.dashSize + material.gapSize;
			uniforms.scale.value = material.scale;
		}

		function refreshUniformsPoints(uniforms, material, pixelRatio, height) {
			uniforms.diffuse.value.copy(material.color);
			uniforms.opacity.value = material.opacity;
			uniforms.size.value = material.size * pixelRatio;
			uniforms.scale.value = height * 0.5;

			if (material.map) {
				uniforms.map.value = material.map;
			}

			if (material.alphaMap) {
				uniforms.alphaMap.value = material.alphaMap;
			} // uv repeat and offset setting priorities
			// 1. color map
			// 2. alpha map


			var uvScaleMap;

			if (material.map) {
				uvScaleMap = material.map;
			} else if (material.alphaMap) {
				uvScaleMap = material.alphaMap;
			}

			if (uvScaleMap !== undefined) {
				if (uvScaleMap.matrixAutoUpdate === true) {
					uvScaleMap.updateMatrix();
				}

				uniforms.uvTransform.value.copy(uvScaleMap.matrix);
			}
		}

		function refreshUniformsSprites(uniforms, material) {
			uniforms.diffuse.value.copy(material.color);
			uniforms.opacity.value = material.opacity;
			uniforms.rotation.value = material.rotation;

			if (material.map) {
				uniforms.map.value = material.map;
			}

			if (material.alphaMap) {
				uniforms.alphaMap.value = material.alphaMap;
			} // uv repeat and offset setting priorities
			// 1. color map
			// 2. alpha map


			var uvScaleMap;

			if (material.map) {
				uvScaleMap = material.map;
			} else if (material.alphaMap) {
				uvScaleMap = material.alphaMap;
			}

			if (uvScaleMap !== undefined) {
				if (uvScaleMap.matrixAutoUpdate === true) {
					uvScaleMap.updateMatrix();
				}

				uniforms.uvTransform.value.copy(uvScaleMap.matrix);
			}
		}

		function refreshUniformsLambert(uniforms, material) {
			if (material.emissiveMap) {
				uniforms.emissiveMap.value = material.emissiveMap;
			}
		}

		function refreshUniformsPhong(uniforms, material) {
			uniforms.specular.value.copy(material.specular);
			uniforms.shininess.value = Math.max(material.shininess, 1e-4); // to prevent pow( 0.0, 0.0 )

			if (material.emissiveMap) {
				uniforms.emissiveMap.value = material.emissiveMap;
			}

			if (material.bumpMap) {
				uniforms.bumpMap.value = material.bumpMap;
				uniforms.bumpScale.value = material.bumpScale;
				if (material.side === BackSide) uniforms.bumpScale.value *= -1;
			}

			if (material.normalMap) {
				uniforms.normalMap.value = material.normalMap;
				uniforms.normalScale.value.copy(material.normalScale);
				if (material.side === BackSide) uniforms.normalScale.value.negate();
			}

			if (material.displacementMap) {
				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;
			}
		}

		function refreshUniformsToon(uniforms, material) {
			if (material.gradientMap) {
				uniforms.gradientMap.value = material.gradientMap;
			}

			if (material.emissiveMap) {
				uniforms.emissiveMap.value = material.emissiveMap;
			}

			if (material.bumpMap) {
				uniforms.bumpMap.value = material.bumpMap;
				uniforms.bumpScale.value = material.bumpScale;
				if (material.side === BackSide) uniforms.bumpScale.value *= -1;
			}

			if (material.normalMap) {
				uniforms.normalMap.value = material.normalMap;
				uniforms.normalScale.value.copy(material.normalScale);
				if (material.side === BackSide) uniforms.normalScale.value.negate();
			}

			if (material.displacementMap) {
				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;
			}
		}

		function refreshUniformsStandard(uniforms, material) {
			uniforms.roughness.value = material.roughness;
			uniforms.metalness.value = material.metalness;

			if (material.roughnessMap) {
				uniforms.roughnessMap.value = material.roughnessMap;
			}

			if (material.metalnessMap) {
				uniforms.metalnessMap.value = material.metalnessMap;
			}

			if (material.emissiveMap) {
				uniforms.emissiveMap.value = material.emissiveMap;
			}

			if (material.bumpMap) {
				uniforms.bumpMap.value = material.bumpMap;
				uniforms.bumpScale.value = material.bumpScale;
				if (material.side === BackSide) uniforms.bumpScale.value *= -1;
			}

			if (material.normalMap) {
				uniforms.normalMap.value = material.normalMap;
				uniforms.normalScale.value.copy(material.normalScale);
				if (material.side === BackSide) uniforms.normalScale.value.negate();
			}

			if (material.displacementMap) {
				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;
			}

			var envMap = properties.get(material).envMap;

			if (envMap) {
				//uniforms.envMap.value = material.envMap; // part of uniforms common
				uniforms.envMapIntensity.value = material.envMapIntensity;
			}
		}

		function refreshUniformsPhysical(uniforms, material) {
			refreshUniformsStandard(uniforms, material);
			uniforms.reflectivity.value = material.reflectivity; // also part of uniforms common

			uniforms.clearcoat.value = material.clearcoat;
			uniforms.clearcoatRoughness.value = material.clearcoatRoughness;
			if (material.sheen) uniforms.sheen.value.copy(material.sheen);

			if (material.clearcoatMap) {
				uniforms.clearcoatMap.value = material.clearcoatMap;
			}

			if (material.clearcoatRoughnessMap) {
				uniforms.clearcoatRoughnessMap.value = material.clearcoatRoughnessMap;
			}

			if (material.clearcoatNormalMap) {
				uniforms.clearcoatNormalScale.value.copy(material.clearcoatNormalScale);
				uniforms.clearcoatNormalMap.value = material.clearcoatNormalMap;

				if (material.side === BackSide) {
					uniforms.clearcoatNormalScale.value.negate();
				}
			}

			uniforms.transmission.value = material.transmission;

			if (material.transmissionMap) {
				uniforms.transmissionMap.value = material.transmissionMap;
			}
		}

		function refreshUniformsMatcap(uniforms, material) {
			if (material.matcap) {
				uniforms.matcap.value = material.matcap;
			}

			if (material.bumpMap) {
				uniforms.bumpMap.value = material.bumpMap;
				uniforms.bumpScale.value = material.bumpScale;
				if (material.side === BackSide) uniforms.bumpScale.value *= -1;
			}

			if (material.normalMap) {
				uniforms.normalMap.value = material.normalMap;
				uniforms.normalScale.value.copy(material.normalScale);
				if (material.side === BackSide) uniforms.normalScale.value.negate();
			}

			if (material.displacementMap) {
				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;
			}
		}

		function refreshUniformsDepth(uniforms, material) {
			if (material.displacementMap) {
				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;
			}
		}

		function refreshUniformsDistance(uniforms, material) {
			if (material.displacementMap) {
				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;
			}

			uniforms.referencePosition.value.copy(material.referencePosition);
			uniforms.nearDistance.value = material.nearDistance;
			uniforms.farDistance.value = material.farDistance;
		}

		function refreshUniformsNormal(uniforms, material) {
			if (material.bumpMap) {
				uniforms.bumpMap.value = material.bumpMap;
				uniforms.bumpScale.value = material.bumpScale;
				if (material.side === BackSide) uniforms.bumpScale.value *= -1;
			}

			if (material.normalMap) {
				uniforms.normalMap.value = material.normalMap;
				uniforms.normalScale.value.copy(material.normalScale);
				if (material.side === BackSide) uniforms.normalScale.value.negate();
			}

			if (material.displacementMap) {
				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;
			}
		}

		return {
			refreshFogUniforms: refreshFogUniforms,
			refreshMaterialUniforms: refreshMaterialUniforms
		};
	}

	function createCanvasElement() {
		var canvas = document.createElementNS('http://www.w3.org/1999/xhtml', 'canvas');
		canvas.style.display = 'block';
		return canvas;
	}

	function WebGLRenderer(parameters) {
		parameters = parameters || {};

		var _canvas = parameters.canvas !== undefined ? parameters.canvas : createCanvasElement(),
				_context = parameters.context !== undefined ? parameters.context : null,
				_alpha = parameters.alpha !== undefined ? parameters.alpha : false,
				_depth = parameters.depth !== undefined ? parameters.depth : true,
				_stencil = parameters.stencil !== undefined ? parameters.stencil : true,
				_antialias = parameters.antialias !== undefined ? parameters.antialias : false,
				_premultipliedAlpha = parameters.premultipliedAlpha !== undefined ? parameters.premultipliedAlpha : true,
				_preserveDrawingBuffer = parameters.preserveDrawingBuffer !== undefined ? parameters.preserveDrawingBuffer : false,
				_powerPreference = parameters.powerPreference !== undefined ? parameters.powerPreference : 'default',
				_failIfMajorPerformanceCaveat = parameters.failIfMajorPerformanceCaveat !== undefined ? parameters.failIfMajorPerformanceCaveat : false;

		var currentRenderList = null;
		var currentRenderState = null; // render() can be called from within a callback triggered by another render.
		// We track this so that the nested render call gets its state isolated from the parent render call.

		var renderStateStack = []; // public properties

		this.domElement = _canvas; // Debug configuration container

		this.debug = {
			/**
			 * Enables error checking and reporting when shader programs are being compiled
			 * @type {boolean}
			 */
			checkShaderErrors: true
		}; // clearing

		this.autoClear = true;
		this.autoClearColor = true;
		this.autoClearDepth = true;
		this.autoClearStencil = true; // scene graph

		this.sortObjects = true; // user-defined clipping

		this.clippingPlanes = [];
		this.localClippingEnabled = false; // physically based shading

		this.gammaFactor = 2.0; // for backwards compatibility

		this.outputEncoding = LinearEncoding; // physical lights

		this.physicallyCorrectLights = false; // tone mapping

		this.toneMapping = NoToneMapping;
		this.toneMappingExposure = 1.0; // morphs

		this.maxMorphTargets = 8;
		this.maxMorphNormals = 4; // internal properties

		var _this = this;

		var _isContextLost = false; // internal state cache

		var _framebuffer = null;
		var _currentActiveCubeFace = 0;
		var _currentActiveMipmapLevel = 0;
		var _currentRenderTarget = null;
		var _currentFramebuffer = null;

		var _currentMaterialId = -1;

		var _currentCamera = null;

		var _currentViewport = new Vector4();

		var _currentScissor = new Vector4();

		var _currentScissorTest = null; //

		var _width = _canvas.width;
		var _height = _canvas.height;
		var _pixelRatio = 1;
		var _opaqueSort = null;
		var _transparentSort = null;

		var _viewport = new Vector4(0, 0, _width, _height);

		var _scissor = new Vector4(0, 0, _width, _height);

		var _scissorTest = false; // frustum

		var _frustum = new Frustum(); // clipping


		var _clippingEnabled = false;
		var _localClippingEnabled = false; // camera matrices cache

		var _projScreenMatrix = new Matrix4();

		var _vector3 = new Vector3();

		var _emptyScene = {
			background: null,
			fog: null,
			environment: null,
			overrideMaterial: null,
			isScene: true
		};

		function getTargetPixelRatio() {
			return _currentRenderTarget === null ? _pixelRatio : 1;
		} // initialize


		var _gl = _context;

		function getContext(contextNames, contextAttributes) {
			for (var i = 0; i < contextNames.length; i++) {
				var contextName = contextNames[i];

				var context = _canvas.getContext(contextName, contextAttributes);

				if (context !== null) return context;
			}

			return null;
		}

		try {
			var contextAttributes = {
				alpha: _alpha,
				depth: _depth,
				stencil: _stencil,
				antialias: _antialias,
				premultipliedAlpha: _premultipliedAlpha,
				preserveDrawingBuffer: _preserveDrawingBuffer,
				powerPreference: _powerPreference,
				failIfMajorPerformanceCaveat: _failIfMajorPerformanceCaveat
			}; // event listeners must be registered before WebGL context is created, see #12753

			_canvas.addEventListener('webglcontextlost', onContextLost, false);

			_canvas.addEventListener('webglcontextrestored', onContextRestore, false);

			if (_gl === null) {
				var contextNames = ['webgl2', 'webgl', 'experimental-webgl'];

				if (_this.isWebGL1Renderer === true) {
					contextNames.shift();
				}

				_gl = getContext(contextNames, contextAttributes);

				if (_gl === null) {
					if (getContext(contextNames)) {
						throw new Error('Error creating WebGL context with your selected attributes.');
					} else {
						throw new Error('Error creating WebGL context.');
					}
				}
			} // Some experimental-webgl implementations do not have getShaderPrecisionFormat


			if (_gl.getShaderPrecisionFormat === undefined) {
				_gl.getShaderPrecisionFormat = function () {
					return {
						'rangeMin': 1,
						'rangeMax': 1,
						'precision': 1
					};
				};
			}
		} catch (error) {
			console.error('THREE.WebGLRenderer: ' + error.message);
			throw error;
		}

		var extensions, capabilities, state, info;
		var properties, textures, cubemaps, attributes, geometries, objects;
		var programCache, materials, renderLists, renderStates, clipping;
		var background, morphtargets, bufferRenderer, indexedBufferRenderer;
		var utils, bindingStates;

		function initGLContext() {
			extensions = new WebGLExtensions(_gl);
			capabilities = new WebGLCapabilities(_gl, extensions, parameters);
			extensions.init(capabilities);
			utils = new WebGLUtils(_gl, extensions, capabilities);
			state = new WebGLState(_gl, extensions, capabilities);
			state.scissor(_currentScissor.copy(_scissor).multiplyScalar(_pixelRatio).floor());
			state.viewport(_currentViewport.copy(_viewport).multiplyScalar(_pixelRatio).floor());
			info = new WebGLInfo(_gl);
			properties = new WebGLProperties();
			textures = new WebGLTextures(_gl, extensions, state, properties, capabilities, utils, info);
			cubemaps = new WebGLCubeMaps(_this);
			attributes = new WebGLAttributes(_gl, capabilities);
			bindingStates = new WebGLBindingStates(_gl, extensions, attributes, capabilities);
			geometries = new WebGLGeometries(_gl, attributes, info, bindingStates);
			objects = new WebGLObjects(_gl, geometries, attributes, info);
			morphtargets = new WebGLMorphtargets(_gl);
			clipping = new WebGLClipping(properties);
			programCache = new WebGLPrograms(_this, cubemaps, extensions, capabilities, bindingStates, clipping);
			materials = new WebGLMaterials(properties);
			renderLists = new WebGLRenderLists(properties);
			renderStates = new WebGLRenderStates(extensions, capabilities);
			background = new WebGLBackground(_this, cubemaps, state, objects, _premultipliedAlpha);
			bufferRenderer = new WebGLBufferRenderer(_gl, extensions, info, capabilities);
			indexedBufferRenderer = new WebGLIndexedBufferRenderer(_gl, extensions, info, capabilities);
			info.programs = programCache.programs;
			_this.capabilities = capabilities;
			_this.extensions = extensions;
			_this.properties = properties;
			_this.renderLists = renderLists;
			_this.state = state;
			_this.info = info;
		}

		initGLContext();
		var xr = typeof navigator !== 'undefined' && 'xr' in navigator ? new WebXRManager(_this, _gl) : new WebVRManager(_this);
		this.xr = xr; // shadow map

		var shadowMap = new WebGLShadowMap(_this, objects, capabilities.maxTextureSize);
		this.shadowMap = shadowMap; // API

		this.getContext = function () {
			return _gl;
		};

		this.getContextAttributes = function () {
			return _gl.getContextAttributes();
		};

		this.forceContextLoss = function () {
			var extension = extensions.get('WEBGL_lose_context');
			if (extension) extension.loseContext();
		};

		this.forceContextRestore = function () {
			var extension = extensions.get('WEBGL_lose_context');
			if (extension) extension.restoreContext();
		};

		this.getPixelRatio = function () {
			return _pixelRatio;
		};

		this.setPixelRatio = function (value) {
			if (value === undefined) return;
			_pixelRatio = value;
			this.setSize(_width, _height, false);
		};

		this.getSize = function (target) {
			if (target === undefined) {
				console.warn('WebGLRenderer: .getsize() now requires a Vector2 as an argument');
				target = new Vector2();
			}

			return target.set(_width, _height);
		};

		this.setSize = function (width, height, updateStyle) {
			if (xr.isPresenting) {
				console.warn('THREE.WebGLRenderer: Can\'t change size while VR device is presenting.');
				return;
			}

			_width = width;
			_height = height;
			_canvas.width = Math.floor(width * _pixelRatio);
			_canvas.height = Math.floor(height * _pixelRatio);

			if (updateStyle !== false) {
				_canvas.style.width = width + 'px';
				_canvas.style.height = height + 'px';
			}

			this.setViewport(0, 0, width, height);
		};

		this.getDrawingBufferSize = function (target) {
			if (target === undefined) {
				console.warn('WebGLRenderer: .getdrawingBufferSize() now requires a Vector2 as an argument');
				target = new Vector2();
			}

			return target.set(_width * _pixelRatio, _height * _pixelRatio).floor();
		};

		this.setDrawingBufferSize = function (width, height, pixelRatio) {
			_width = width;
			_height = height;
			_pixelRatio = pixelRatio;
			_canvas.width = Math.floor(width * pixelRatio);
			_canvas.height = Math.floor(height * pixelRatio);
			this.setViewport(0, 0, width, height);
		};

		this.getCurrentViewport = function (target) {
			if (target === undefined) {
				console.warn('WebGLRenderer: .getCurrentViewport() now requires a Vector4 as an argument');
				target = new Vector4();
			}

			return target.copy(_currentViewport);
		};

		this.getViewport = function (target) {
			return target.copy(_viewport);
		};

		this.setViewport = function (x, y, width, height) {
			if (x.isVector4) {
				_viewport.set(x.x, x.y, x.z, x.w);
			} else {
				_viewport.set(x, y, width, height);
			}

			state.viewport(_currentViewport.copy(_viewport).multiplyScalar(_pixelRatio).floor());
		};

		this.getScissor = function (target) {
			return target.copy(_scissor);
		};

		this.setScissor = function (x, y, width, height) {
			if (x.isVector4) {
				_scissor.set(x.x, x.y, x.z, x.w);
			} else {
				_scissor.set(x, y, width, height);
			}

			state.scissor(_currentScissor.copy(_scissor).multiplyScalar(_pixelRatio).floor());
		};

		this.getScissorTest = function () {
			return _scissorTest;
		};

		this.setScissorTest = function (boolean) {
			state.setScissorTest(_scissorTest = boolean);
		};

		this.setOpaqueSort = function (method) {
			_opaqueSort = method;
		};

		this.setTransparentSort = function (method) {
			_transparentSort = method;
		}; // Clearing


		this.getClearColor = function (target) {
			if (target === undefined) {
				console.warn('WebGLRenderer: .getClearColor() now requires a Color as an argument');
				target = new Color();
			}

			return target.copy(background.getClearColor());
		};

		this.setClearColor = function () {
			background.setClearColor.apply(background, arguments);
		};

		this.getClearAlpha = function () {
			return background.getClearAlpha();
		};

		this.setClearAlpha = function () {
			background.setClearAlpha.apply(background, arguments);
		};

		this.clear = function (color, depth, stencil) {
			var bits = 0;
			if (color === undefined || color) bits |= 16384;
			if (depth === undefined || depth) bits |= 256;
			if (stencil === undefined || stencil) bits |= 1024;

			_gl.clear(bits);
		};

		this.clearColor = function () {
			this.clear(true, false, false);
		};

		this.clearDepth = function () {
			this.clear(false, true, false);
		};

		this.clearStencil = function () {
			this.clear(false, false, true);
		}; //


		this.dispose = function () {
			_canvas.removeEventListener('webglcontextlost', onContextLost, false);

			_canvas.removeEventListener('webglcontextrestored', onContextRestore, false);

			renderLists.dispose();
			renderStates.dispose();
			properties.dispose();
			cubemaps.dispose();
			objects.dispose();
			bindingStates.dispose();
			xr.dispose();
			animation.stop();
		}; // Events


		function onContextLost(event) {
			event.preventDefault();
			console.log('THREE.WebGLRenderer: Context Lost.');
			_isContextLost = true;
		}

		function onContextRestore()
		/* event */
		{
			console.log('THREE.WebGLRenderer: Context Restored.');
			_isContextLost = false;
			initGLContext();
		}

		function onMaterialDispose(event) {
			var material = event.target;
			material.removeEventListener('dispose', onMaterialDispose);
			deallocateMaterial(material);
		} // Buffer deallocation


		function deallocateMaterial(material) {
			releaseMaterialProgramReference(material);
			properties.remove(material);
		}

		function releaseMaterialProgramReference(material) {
			var programInfo = properties.get(material).program;

			if (programInfo !== undefined) {
				programCache.releaseProgram(programInfo);
			}
		} // Buffer rendering


		function renderObjectImmediate(object, program) {
			object.render(function (object) {
				_this.renderBufferImmediate(object, program);
			});
		}

		this.renderBufferImmediate = function (object, program) {
			bindingStates.initAttributes();
			var buffers = properties.get(object);
			if (object.hasPositions && !buffers.position) buffers.position = _gl.createBuffer();
			if (object.hasNormals && !buffers.normal) buffers.normal = _gl.createBuffer();
			if (object.hasUvs && !buffers.uv) buffers.uv = _gl.createBuffer();
			if (object.hasColors && !buffers.color) buffers.color = _gl.createBuffer();
			var programAttributes = program.getAttributes();

			if (object.hasPositions) {
				_gl.bindBuffer(34962, buffers.position);

				_gl.bufferData(34962, object.positionArray, 35048);

				bindingStates.enableAttribute(programAttributes.position);

				_gl.vertexAttribPointer(programAttributes.position, 3, 5126, false, 0, 0);
			}

			if (object.hasNormals) {
				_gl.bindBuffer(34962, buffers.normal);

				_gl.bufferData(34962, object.normalArray, 35048);

				bindingStates.enableAttribute(programAttributes.normal);

				_gl.vertexAttribPointer(programAttributes.normal, 3, 5126, false, 0, 0);
			}

			if (object.hasUvs) {
				_gl.bindBuffer(34962, buffers.uv);

				_gl.bufferData(34962, object.uvArray, 35048);

				bindingStates.enableAttribute(programAttributes.uv);

				_gl.vertexAttribPointer(programAttributes.uv, 2, 5126, false, 0, 0);
			}

			if (object.hasColors) {
				_gl.bindBuffer(34962, buffers.color);

				_gl.bufferData(34962, object.colorArray, 35048);

				bindingStates.enableAttribute(programAttributes.color);

				_gl.vertexAttribPointer(programAttributes.color, 3, 5126, false, 0, 0);
			}

			bindingStates.disableUnusedAttributes();

			_gl.drawArrays(4, 0, object.count);

			object.count = 0;
		};

		this.renderBufferDirect = function (camera, scene, geometry, material, object, group) {
			if (scene === null) scene = _emptyScene; // renderBufferDirect second parameter used to be fog (could be null)

			var frontFaceCW = object.isMesh && object.matrixWorld.determinant() < 0;
			var program = setProgram(camera, scene, material, object);
			state.setMaterial(material, frontFaceCW); //

			var index = geometry.index;
			var position = geometry.attributes.position; //

			if (index === null) {
				if (position === undefined || position.count === 0) return;
			} else if (index.count === 0) {
				return;
			} //


			var rangeFactor = 1;

			if (material.wireframe === true) {
				index = geometries.getWireframeAttribute(geometry);
				rangeFactor = 2;
			}

			if (material.morphTargets || material.morphNormals) {
				morphtargets.update(object, geometry, material, program);
			}

			bindingStates.setup(object, material, program, geometry, index);
			var attribute;
			var renderer = bufferRenderer;

			if (index !== null) {
				attribute = attributes.get(index);
				renderer = indexedBufferRenderer;
				renderer.setIndex(attribute);
			} //


			var dataCount = index !== null ? index.count : position.count;
			var rangeStart = geometry.drawRange.start * rangeFactor;
			var rangeCount = geometry.drawRange.count * rangeFactor;
			var groupStart = group !== null ? group.start * rangeFactor : 0;
			var groupCount = group !== null ? group.count * rangeFactor : Infinity;
			var drawStart = Math.max(rangeStart, groupStart);
			var drawEnd = Math.min(dataCount, rangeStart + rangeCount, groupStart + groupCount) - 1;
			var drawCount = Math.max(0, drawEnd - drawStart + 1);
			if (drawCount === 0) return; //

			if (object.isMesh) {
				if (material.wireframe === true) {
					state.setLineWidth(material.wireframeLinewidth * getTargetPixelRatio());
					renderer.setMode(1);
				} else {
					renderer.setMode(4);
				}
			} else if (object.isLine) {
				var lineWidth = material.linewidth;
				if (lineWidth === undefined) lineWidth = 1; // Not using Line*Material

				state.setLineWidth(lineWidth * getTargetPixelRatio());

				if (object.isLineSegments) {
					renderer.setMode(1);
				} else if (object.isLineLoop) {
					renderer.setMode(2);
				} else {
					renderer.setMode(3);
				}
			} else if (object.isPoints) {
				renderer.setMode(0);
			} else if (object.isSprite) {
				renderer.setMode(4);
			}

			if (object.isInstancedMesh) {
				renderer.renderInstances(drawStart, drawCount, object.count);
			} else if (geometry.isInstancedBufferGeometry) {
				var instanceCount = Math.min(geometry.instanceCount, geometry._maxInstanceCount);
				renderer.renderInstances(drawStart, drawCount, instanceCount);
			} else {
				renderer.render(drawStart, drawCount);
			}
		}; // Compile


		this.compile = function (scene, camera) {
			currentRenderState = renderStates.get(scene);
			currentRenderState.init();
			scene.traverseVisible(function (object) {
				if (object.isLight && object.layers.test(camera.layers)) {
					currentRenderState.pushLight(object);

					if (object.castShadow) {
						currentRenderState.pushShadow(object);
					}
				}
			});
			currentRenderState.setupLights();
			var compiled = new WeakMap();
			scene.traverse(function (object) {
				var material = object.material;

				if (material) {
					if (Array.isArray(material)) {
						for (var i = 0; i < material.length; i++) {
							var material2 = material[i];

							if (compiled.has(material2) === false) {
								initMaterial(material2, scene, object);
								compiled.set(material2);
							}
						}
					} else if (compiled.has(material) === false) {
						initMaterial(material, scene, object);
						compiled.set(material);
					}
				}
			});
		}; // Animation Loop


		var onAnimationFrameCallback = null;

		function onAnimationFrame(time) {
			if (xr.isPresenting) return;
			if (onAnimationFrameCallback) onAnimationFrameCallback(time);
		}

		var animation = new WebGLAnimation();
		animation.setAnimationLoop(onAnimationFrame);
		if (typeof window !== 'undefined') animation.setContext(window);

		this.setAnimationLoop = function (callback) {
			onAnimationFrameCallback = callback;
			xr.setAnimationLoop(callback);
			callback === null ? animation.stop() : animation.start();
		}; // Rendering


		this.render = function (scene, camera) {
			var renderTarget, forceClear;

			if (arguments[2] !== undefined) {
				console.warn('THREE.WebGLRenderer.render(): the renderTarget argument has been removed. Use .setRenderTarget() instead.');
				renderTarget = arguments[2];
			}

			if (arguments[3] !== undefined) {
				console.warn('THREE.WebGLRenderer.render(): the forceClear argument has been removed. Use .clear() instead.');
				forceClear = arguments[3];
			}

			if (camera !== undefined && camera.isCamera !== true) {
				console.error('THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.');
				return;
			}

			if (_isContextLost === true) return; // reset caching for this frame

			bindingStates.resetDefaultState();
			_currentMaterialId = -1;
			_currentCamera = null; // update scene graph

			if (scene.autoUpdate === true) scene.updateMatrixWorld(); // update camera matrices and frustum

			if (camera.parent === null) camera.updateMatrixWorld();

			if (xr.enabled === true && xr.isPresenting === true) {
				camera = xr.getCamera(camera);
			} //


			if (scene.isScene === true) scene.onBeforeRender(_this, scene, camera, renderTarget || _currentRenderTarget);
			currentRenderState = renderStates.get(scene, renderStateStack.length);
			currentRenderState.init();
			renderStateStack.push(currentRenderState);

			_projScreenMatrix.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);

			_frustum.setFromProjectionMatrix(_projScreenMatrix);

			_localClippingEnabled = this.localClippingEnabled;
			_clippingEnabled = clipping.init(this.clippingPlanes, _localClippingEnabled, camera);
			currentRenderList = renderLists.get(scene, camera);
			currentRenderList.init();
			projectObject(scene, camera, 0, _this.sortObjects);
			currentRenderList.finish();

			if (_this.sortObjects === true) {
				currentRenderList.sort(_opaqueSort, _transparentSort);
			} //


			if (_clippingEnabled === true) clipping.beginShadows();
			var shadowsArray = currentRenderState.state.shadowsArray;
			shadowMap.render(shadowsArray, scene, camera);
			currentRenderState.setupLights();
			currentRenderState.setupLightsView(camera);
			if (_clippingEnabled === true) clipping.endShadows(); //

			if (this.info.autoReset === true) this.info.reset();

			if (renderTarget !== undefined) {
				this.setRenderTarget(renderTarget);
			} //


			background.render(currentRenderList, scene, camera, forceClear); // render scene

			var opaqueObjects = currentRenderList.opaque;
			var transparentObjects = currentRenderList.transparent;
			if (opaqueObjects.length > 0) renderObjects(opaqueObjects, scene, camera);
			if (transparentObjects.length > 0) renderObjects(transparentObjects, scene, camera); //

			if (scene.isScene === true) scene.onAfterRender(_this, scene, camera); //

			if (_currentRenderTarget !== null) {
				// Generate mipmap if we're using any kind of mipmap filtering
				textures.updateRenderTargetMipmap(_currentRenderTarget); // resolve multisample renderbuffers to a single-sample texture if necessary

				textures.updateMultisampleRenderTarget(_currentRenderTarget);
			} // Ensure depth buffer writing is enabled so it can be cleared on next render


			state.buffers.depth.setTest(true);
			state.buffers.depth.setMask(true);
			state.buffers.color.setMask(true);
			state.setPolygonOffset(false);

			if (xr.enabled && xr.submitFrame) {
				xr.submitFrame();
			} // _gl.finish();


			renderStateStack.pop();

			if (renderStateStack.length > 0) {
				currentRenderState = renderStateStack[renderStateStack.length - 1];
			} else {
				currentRenderState = null;
			}

			currentRenderList = null;
		};

		function projectObject(object, camera, groupOrder, sortObjects) {
			if (object.visible === false) return;
			var visible = object.layers.test(camera.layers);

			if (visible) {
				if (object.isGroup) {
					groupOrder = object.renderOrder;
				} else if (object.isLOD) {
					if (object.autoUpdate === true) object.update(camera);
				} else if (object.isLight) {
					currentRenderState.pushLight(object);

					if (object.castShadow) {
						currentRenderState.pushShadow(object);
					}
				} else if (object.isSprite) {
					if (!object.frustumCulled || _frustum.intersectsSprite(object)) {
						if (sortObjects) {
							_vector3.setFromMatrixPosition(object.matrixWorld).applyMatrix4(_projScreenMatrix);
						}

						var geometry = objects.update(object);
						var material = object.material;

						if (material.visible) {
							currentRenderList.push(object, geometry, material, groupOrder, _vector3.z, null);
						}
					}
				} else if (object.isImmediateRenderObject) {
					if (sortObjects) {
						_vector3.setFromMatrixPosition(object.matrixWorld).applyMatrix4(_projScreenMatrix);
					}

					currentRenderList.push(object, null, object.material, groupOrder, _vector3.z, null);
				} else if (object.isMesh || object.isLine || object.isPoints) {
					if (object.isSkinnedMesh) {
						// update skeleton only once in a frame
						if (object.skeleton.frame !== info.render.frame) {
							object.skeleton.update();
							object.skeleton.frame = info.render.frame;
						}
					}

					if (!object.frustumCulled || _frustum.intersectsObject(object)) {
						if (sortObjects) {
							_vector3.setFromMatrixPosition(object.matrixWorld).applyMatrix4(_projScreenMatrix);
						}

						var _geometry = objects.update(object);

						var _material = object.material;

						if (Array.isArray(_material)) {
							var groups = _geometry.groups;

							for (var i = 0, l = groups.length; i < l; i++) {
								var group = groups[i];
								var groupMaterial = _material[group.materialIndex];

								if (groupMaterial && groupMaterial.visible) {
									currentRenderList.push(object, _geometry, groupMaterial, groupOrder, _vector3.z, group);
								}
							}
						} else if (_material.visible) {
							currentRenderList.push(object, _geometry, _material, groupOrder, _vector3.z, null);
						}
					}
				}
			}

			var children = object.children;

			for (var _i = 0, _l = children.length; _i < _l; _i++) {
				projectObject(children[_i], camera, groupOrder, sortObjects);
			}
		}

		function renderObjects(renderList, scene, camera) {
			var overrideMaterial = scene.isScene === true ? scene.overrideMaterial : null;

			for (var i = 0, l = renderList.length; i < l; i++) {
				var renderItem = renderList[i];
				var object = renderItem.object;
				var geometry = renderItem.geometry;
				var material = overrideMaterial === null ? renderItem.material : overrideMaterial;
				var group = renderItem.group;

				if (camera.isArrayCamera) {
					var cameras = camera.cameras;

					for (var j = 0, jl = cameras.length; j < jl; j++) {
						var camera2 = cameras[j];

						if (object.layers.test(camera2.layers)) {
							state.viewport(_currentViewport.copy(camera2.viewport));
							currentRenderState.setupLightsView(camera2);
							renderObject(object, scene, camera2, geometry, material, group);
						}
					}
				} else {
					renderObject(object, scene, camera, geometry, material, group);
				}
			}
		}

		function renderObject(object, scene, camera, geometry, material, group) {
			object.onBeforeRender(_this, scene, camera, geometry, material, group);
			object.modelViewMatrix.multiplyMatrices(camera.matrixWorldInverse, object.matrixWorld);
			object.normalMatrix.getNormalMatrix(object.modelViewMatrix);

			if (object.isImmediateRenderObject) {
				var program = setProgram(camera, scene, material, object);
				state.setMaterial(material);
				bindingStates.reset();
				renderObjectImmediate(object, program);
			} else {
				_this.renderBufferDirect(camera, scene, geometry, material, object, group);
			}

			object.onAfterRender(_this, scene, camera, geometry, material, group);
		}

		function initMaterial(material, scene, object) {
			if (scene.isScene !== true) scene = _emptyScene; // scene could be a Mesh, Line, Points, ...

			var materialProperties = properties.get(material);
			var lights = currentRenderState.state.lights;
			var shadowsArray = currentRenderState.state.shadowsArray;
			var lightsStateVersion = lights.state.version;
			var parameters = programCache.getParameters(material, lights.state, shadowsArray, scene, object);
			var programCacheKey = programCache.getProgramCacheKey(parameters);
			var program = materialProperties.program;
			var programChange = true; // always update environment and fog - changing these trigger an initMaterial call, but it's possible that the program doesn't change

			materialProperties.environment = material.isMeshStandardMaterial ? scene.environment : null;
			materialProperties.fog = scene.fog;
			materialProperties.envMap = cubemaps.get(material.envMap || materialProperties.environment);

			if (program === undefined) {
				// new material
				material.addEventListener('dispose', onMaterialDispose);
			} else if (program.cacheKey !== programCacheKey) {
				// changed glsl or parameters
				releaseMaterialProgramReference(material);
			} else if (materialProperties.lightsStateVersion !== lightsStateVersion) {
				programChange = false;
			} else if (parameters.shaderID !== undefined) {
				// same glsl and uniform list
				return;
			} else {
				// only rebuild uniform list
				programChange = false;
			}

			if (programChange) {
				parameters.uniforms = programCache.getUniforms(material);
				material.onBeforeCompile(parameters, _this);
				program = programCache.acquireProgram(parameters, programCacheKey);
				materialProperties.program = program;
				materialProperties.uniforms = parameters.uniforms;
				materialProperties.outputEncoding = parameters.outputEncoding;
			}

			var uniforms = materialProperties.uniforms;

			if (!material.isShaderMaterial && !material.isRawShaderMaterial || material.clipping === true) {
				materialProperties.numClippingPlanes = clipping.numPlanes;
				materialProperties.numIntersection = clipping.numIntersection;
				uniforms.clippingPlanes = clipping.uniform;
			} // store the light setup it was created for


			materialProperties.needsLights = materialNeedsLights(material);
			materialProperties.lightsStateVersion = lightsStateVersion;

			if (materialProperties.needsLights) {
				// wire up the material to this renderer's lighting state
				uniforms.ambientLightColor.value = lights.state.ambient;
				uniforms.lightProbe.value = lights.state.probe;
				uniforms.directionalLights.value = lights.state.directional;
				uniforms.directionalLightShadows.value = lights.state.directionalShadow;
				uniforms.spotLights.value = lights.state.spot;
				uniforms.spotLightShadows.value = lights.state.spotShadow;
				uniforms.rectAreaLights.value = lights.state.rectArea;
				uniforms.ltc_1.value = lights.state.rectAreaLTC1;
				uniforms.ltc_2.value = lights.state.rectAreaLTC2;
				uniforms.pointLights.value = lights.state.point;
				uniforms.pointLightShadows.value = lights.state.pointShadow;
				uniforms.hemisphereLights.value = lights.state.hemi;
				uniforms.directionalShadowMap.value = lights.state.directionalShadowMap;
				uniforms.directionalShadowMatrix.value = lights.state.directionalShadowMatrix;
				uniforms.spotShadowMap.value = lights.state.spotShadowMap;
				uniforms.spotShadowMatrix.value = lights.state.spotShadowMatrix;
				uniforms.pointShadowMap.value = lights.state.pointShadowMap;
				uniforms.pointShadowMatrix.value = lights.state.pointShadowMatrix; // TODO (abelnation): add area lights shadow info to uniforms
			}

			var progUniforms = materialProperties.program.getUniforms();
			var uniformsList = WebGLUniforms.seqWithValue(progUniforms.seq, uniforms);
			materialProperties.uniformsList = uniformsList;
		}

		function setProgram(camera, scene, material, object) {
			if (scene.isScene !== true) scene = _emptyScene; // scene could be a Mesh, Line, Points, ...

			textures.resetTextureUnits();
			var fog = scene.fog;
			var environment = material.isMeshStandardMaterial ? scene.environment : null;
			var encoding = _currentRenderTarget === null ? _this.outputEncoding : _currentRenderTarget.texture.encoding;
			var envMap = cubemaps.get(material.envMap || environment);
			var materialProperties = properties.get(material);
			var lights = currentRenderState.state.lights;

			if (_clippingEnabled === true) {
				if (_localClippingEnabled === true || camera !== _currentCamera) {
					var useCache = camera === _currentCamera && material.id === _currentMaterialId; // we might want to call this function with some ClippingGroup
					// object instead of the material, once it becomes feasible
					// (#8465, #8379)

					clipping.setState(material, camera, useCache);
				}
			}

			if (material.version === materialProperties.__version) {
				if (material.fog && materialProperties.fog !== fog) {
					initMaterial(material, scene, object);
				} else if (materialProperties.environment !== environment) {
					initMaterial(material, scene, object);
				} else if (materialProperties.needsLights && materialProperties.lightsStateVersion !== lights.state.version) {
					initMaterial(material, scene, object);
				} else if (materialProperties.numClippingPlanes !== undefined && (materialProperties.numClippingPlanes !== clipping.numPlanes || materialProperties.numIntersection !== clipping.numIntersection)) {
					initMaterial(material, scene, object);
				} else if (materialProperties.outputEncoding !== encoding) {
					initMaterial(material, scene, object);
				} else if (materialProperties.envMap !== envMap) {
					initMaterial(material, scene, object);
				}
			} else {
				initMaterial(material, scene, object);
				materialProperties.__version = material.version;
			}

			var refreshProgram = false;
			var refreshMaterial = false;
			var refreshLights = false;
			var program = materialProperties.program,
					p_uniforms = program.getUniforms(),
					m_uniforms = materialProperties.uniforms;

			if (state.useProgram(program.program)) {
				refreshProgram = true;
				refreshMaterial = true;
				refreshLights = true;
			}

			if (material.id !== _currentMaterialId) {
				_currentMaterialId = material.id;
				refreshMaterial = true;
			}

			if (refreshProgram || _currentCamera !== camera) {
				p_uniforms.setValue(_gl, 'projectionMatrix', camera.projectionMatrix);

				if (capabilities.logarithmicDepthBuffer) {
					p_uniforms.setValue(_gl, 'logDepthBufFC', 2.0 / (Math.log(camera.far + 1.0) / Math.LN2));
				}

				if (_currentCamera !== camera) {
					_currentCamera = camera; // lighting uniforms depend on the camera so enforce an update
					// now, in case this material supports lights - or later, when
					// the next material that does gets activated:

					refreshMaterial = true; // set to true on material change

					refreshLights = true; // remains set until update done
				} // load material specific uniforms
				// (shader material also gets them for the sake of genericity)


				if (material.isShaderMaterial || material.isMeshPhongMaterial || material.isMeshToonMaterial || material.isMeshStandardMaterial || material.envMap) {
					var uCamPos = p_uniforms.map.cameraPosition;

					if (uCamPos !== undefined) {
						uCamPos.setValue(_gl, _vector3.setFromMatrixPosition(camera.matrixWorld));
					}
				}

				if (material.isMeshPhongMaterial || material.isMeshToonMaterial || material.isMeshLambertMaterial || material.isMeshBasicMaterial || material.isMeshStandardMaterial || material.isShaderMaterial) {
					p_uniforms.setValue(_gl, 'isOrthographic', camera.isOrthographicCamera === true);
				}

				if (material.isMeshPhongMaterial || material.isMeshToonMaterial || material.isMeshLambertMaterial || material.isMeshBasicMaterial || material.isMeshStandardMaterial || material.isShaderMaterial || material.isShadowMaterial || material.skinning) {
					p_uniforms.setValue(_gl, 'viewMatrix', camera.matrixWorldInverse);
				}
			} // skinning uniforms must be set even if material didn't change
			// auto-setting of texture unit for bone texture must go before other textures
			// otherwise textures used for skinning can take over texture units reserved for other material textures


			if (material.skinning) {
				p_uniforms.setOptional(_gl, object, 'bindMatrix');
				p_uniforms.setOptional(_gl, object, 'bindMatrixInverse');
				var skeleton = object.skeleton;

				if (skeleton) {
					var bones = skeleton.bones;

					if (capabilities.floatVertexTextures) {
						if (skeleton.boneTexture === null) {
							// layout (1 matrix = 4 pixels)
							//			RGBA RGBA RGBA RGBA (=> column1, column2, column3, column4)
							//	with	8x8	pixel texture max	 16 bones * 4 pixels =	(8 * 8)
							//			 16x16 pixel texture max	 64 bones * 4 pixels = (16 * 16)
							//			 32x32 pixel texture max	256 bones * 4 pixels = (32 * 32)
							//			 64x64 pixel texture max 1024 bones * 4 pixels = (64 * 64)
							var size = Math.sqrt(bones.length * 4); // 4 pixels needed for 1 matrix

							size = MathUtils.ceilPowerOfTwo(size);
							size = Math.max(size, 4);
							var boneMatrices = new Float32Array(size * size * 4); // 4 floats per RGBA pixel

							boneMatrices.set(skeleton.boneMatrices); // copy current values

							var boneTexture = new DataTexture(boneMatrices, size, size, RGBAFormat, FloatType);
							skeleton.boneMatrices = boneMatrices;
							skeleton.boneTexture = boneTexture;
							skeleton.boneTextureSize = size;
						}

						p_uniforms.setValue(_gl, 'boneTexture', skeleton.boneTexture, textures);
						p_uniforms.setValue(_gl, 'boneTextureSize', skeleton.boneTextureSize);
					} else {
						p_uniforms.setOptional(_gl, skeleton, 'boneMatrices');
					}
				}
			}

			if (refreshMaterial || materialProperties.receiveShadow !== object.receiveShadow) {
				materialProperties.receiveShadow = object.receiveShadow;
				p_uniforms.setValue(_gl, 'receiveShadow', object.receiveShadow);
			}

			if (refreshMaterial) {
				p_uniforms.setValue(_gl, 'toneMappingExposure', _this.toneMappingExposure);

				if (materialProperties.needsLights) {
					// the current material requires lighting info
					// note: all lighting uniforms are always set correctly
					// they simply reference the renderer's state for their
					// values
					//
					// use the current material's .needsUpdate flags to set
					// the GL state when required
					markUniformsLightsNeedsUpdate(m_uniforms, refreshLights);
				} // refresh uniforms common to several materials


				if (fog && material.fog) {
					materials.refreshFogUniforms(m_uniforms, fog);
				}

				materials.refreshMaterialUniforms(m_uniforms, material, _pixelRatio, _height);
				WebGLUniforms.upload(_gl, materialProperties.uniformsList, m_uniforms, textures);
			}

			if (material.isShaderMaterial && material.uniformsNeedUpdate === true) {
				WebGLUniforms.upload(_gl, materialProperties.uniformsList, m_uniforms, textures);
				material.uniformsNeedUpdate = false;
			}

			if (material.isSpriteMaterial) {
				p_uniforms.setValue(_gl, 'center', object.center);
			} // common matrices


			p_uniforms.setValue(_gl, 'modelViewMatrix', object.modelViewMatrix);
			p_uniforms.setValue(_gl, 'normalMatrix', object.normalMatrix);
			p_uniforms.setValue(_gl, 'modelMatrix', object.matrixWorld);
			return program;
		} // If uniforms are marked as clean, they don't need to be loaded to the GPU.


		function markUniformsLightsNeedsUpdate(uniforms, value) {
			uniforms.ambientLightColor.needsUpdate = value;
			uniforms.lightProbe.needsUpdate = value;
			uniforms.directionalLights.needsUpdate = value;
			uniforms.directionalLightShadows.needsUpdate = value;
			uniforms.pointLights.needsUpdate = value;
			uniforms.pointLightShadows.needsUpdate = value;
			uniforms.spotLights.needsUpdate = value;
			uniforms.spotLightShadows.needsUpdate = value;
			uniforms.rectAreaLights.needsUpdate = value;
			uniforms.hemisphereLights.needsUpdate = value;
		}

		function materialNeedsLights(material) {
			return material.isMeshLambertMaterial || material.isMeshToonMaterial || material.isMeshPhongMaterial || material.isMeshStandardMaterial || material.isShadowMaterial || material.isShaderMaterial && material.lights === true;
		} // this.setTexture2D = setTexture2D;


		this.setTexture2D = function () {
			var warned = false; // backwards compatibility: peel texture.texture

			return function setTexture2D(texture, slot) {
				if (texture && texture.isWebGLRenderTarget) {
					if (!warned) {
						console.warn("THREE.WebGLRenderer.setTexture2D: don't use render targets as textures. Use their .texture property instead.");
						warned = true;
					}

					texture = texture.texture;
				}

				textures.setTexture2D(texture, slot);
			};
		}(); //


		this.setFramebuffer = function (value) {
			if (_framebuffer !== value && _currentRenderTarget === null) _gl.bindFramebuffer(36160, value);
			_framebuffer = value;
		};

		this.getActiveCubeFace = function () {
			return _currentActiveCubeFace;
		};

		this.getActiveMipmapLevel = function () {
			return _currentActiveMipmapLevel;
		};

		this.getRenderList = function () {
			return currentRenderList;
		};

		this.setRenderList = function (renderList) {
			currentRenderList = renderList;
		};

		this.getRenderTarget = function () {
			return _currentRenderTarget;
		};

		this.setRenderTarget = function (renderTarget, activeCubeFace, activeMipmapLevel) {
			if (activeCubeFace === void 0) {
				activeCubeFace = 0;
			}

			if (activeMipmapLevel === void 0) {
				activeMipmapLevel = 0;
			}

			_currentRenderTarget = renderTarget;
			_currentActiveCubeFace = activeCubeFace;
			_currentActiveMipmapLevel = activeMipmapLevel;

			if (renderTarget && properties.get(renderTarget).__webglFramebuffer === undefined) {
				textures.setupRenderTarget(renderTarget);
			}

			var framebuffer = _framebuffer;
			var isCube = false;

			if (renderTarget) {
				var __webglFramebuffer = properties.get(renderTarget).__webglFramebuffer;

				if (renderTarget.isWebGLCubeRenderTarget) {
					framebuffer = __webglFramebuffer[activeCubeFace];
					isCube = true;
				} else if (renderTarget.isWebGLMultisampleRenderTarget) {
					framebuffer = properties.get(renderTarget).__webglMultisampledFramebuffer;
				} else {
					framebuffer = __webglFramebuffer;
				}

				_currentViewport.copy(renderTarget.viewport);

				_currentScissor.copy(renderTarget.scissor);

				_currentScissorTest = renderTarget.scissorTest;
			} else {
				_currentViewport.copy(_viewport).multiplyScalar(_pixelRatio).floor();

				_currentScissor.copy(_scissor).multiplyScalar(_pixelRatio).floor();

				_currentScissorTest = _scissorTest;
			}

			if (_currentFramebuffer !== framebuffer) {
				_gl.bindFramebuffer(36160, framebuffer);

				_currentFramebuffer = framebuffer;
			}

			state.viewport(_currentViewport);
			state.scissor(_currentScissor);
			state.setScissorTest(_currentScissorTest);

			if (isCube) {
				var textureProperties = properties.get(renderTarget.texture);

				_gl.framebufferTexture2D(36160, 36064, 34069 + activeCubeFace, textureProperties.__webglTexture, activeMipmapLevel);
			}
		};

		this.readRenderTargetPixels = function (renderTarget, x, y, width, height, buffer, activeCubeFaceIndex) {
			if (!(renderTarget && renderTarget.isWebGLRenderTarget)) {
				console.error('THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not THREE.WebGLRenderTarget.');
				return;
			}

			var framebuffer = properties.get(renderTarget).__webglFramebuffer;

			if (renderTarget.isWebGLCubeRenderTarget && activeCubeFaceIndex !== undefined) {
				framebuffer = framebuffer[activeCubeFaceIndex];
			}

			if (framebuffer) {
				var restore = false;

				if (framebuffer !== _currentFramebuffer) {
					_gl.bindFramebuffer(36160, framebuffer);

					restore = true;
				}

				try {
					var texture = renderTarget.texture;
					var textureFormat = texture.format;
					var textureType = texture.type;

					if (textureFormat !== RGBAFormat && utils.convert(textureFormat) !== _gl.getParameter(35739)) {
						console.error('THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in RGBA or implementation defined format.');
						return;
					}

					var halfFloatSupportedByExt = textureType === HalfFloatType && (extensions.has('EXT_color_buffer_half_float') || capabilities.isWebGL2 && extensions.has('EXT_color_buffer_float'));

					if (textureType !== UnsignedByteType && utils.convert(textureType) !== _gl.getParameter(35738) && // IE11, Edge and Chrome Mac < 52 (#9513)
					!(textureType === FloatType && (capabilities.isWebGL2 || extensions.has('OES_texture_float') || extensions.has('WEBGL_color_buffer_float'))) && // Chrome Mac >= 52 and Firefox
					!halfFloatSupportedByExt) {
						console.error('THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in UnsignedByteType or implementation defined type.');
						return;
					}

					if (_gl.checkFramebufferStatus(36160) === 36053) {
						// the following if statement ensures valid read requests (no out-of-bounds pixels, see #8604)
						if (x >= 0 && x <= renderTarget.width - width && y >= 0 && y <= renderTarget.height - height) {
							_gl.readPixels(x, y, width, height, utils.convert(textureFormat), utils.convert(textureType), buffer);
						}
					} else {
						console.error('THREE.WebGLRenderer.readRenderTargetPixels: readPixels from renderTarget failed. Framebuffer not complete.');
					}
				} finally {
					if (restore) {
						_gl.bindFramebuffer(36160, _currentFramebuffer);
					}
				}
			}
		};

		this.copyFramebufferToTexture = function (position, texture, level) {
			if (level === void 0) {
				level = 0;
			}

			var levelScale = Math.pow(2, -level);
			var width = Math.floor(texture.image.width * levelScale);
			var height = Math.floor(texture.image.height * levelScale);
			var glFormat = utils.convert(texture.format);
			textures.setTexture2D(texture, 0);

			_gl.copyTexImage2D(3553, level, glFormat, position.x, position.y, width, height, 0);

			state.unbindTexture();
		};

		this.copyTextureToTexture = function (position, srcTexture, dstTexture, level) {
			if (level === void 0) {
				level = 0;
			}

			var width = srcTexture.image.width;
			var height = srcTexture.image.height;
			var glFormat = utils.convert(dstTexture.format);
			var glType = utils.convert(dstTexture.type);
			textures.setTexture2D(dstTexture, 0); // As another texture upload may have changed pixelStorei
			// parameters, make sure they are correct for the dstTexture

			_gl.pixelStorei(37440, dstTexture.flipY);

			_gl.pixelStorei(37441, dstTexture.premultiplyAlpha);

			_gl.pixelStorei(3317, dstTexture.unpackAlignment);

			if (srcTexture.isDataTexture) {
				_gl.texSubImage2D(3553, level, position.x, position.y, width, height, glFormat, glType, srcTexture.image.data);
			} else {
				if (srcTexture.isCompressedTexture) {
					_gl.compressedTexSubImage2D(3553, level, position.x, position.y, srcTexture.mipmaps[0].width, srcTexture.mipmaps[0].height, glFormat, srcTexture.mipmaps[0].data);
				} else {
					_gl.texSubImage2D(3553, level, position.x, position.y, glFormat, glType, srcTexture.image);
				}
			} // Generate mipmaps only when copying level 0


			if (level === 0 && dstTexture.generateMipmaps) _gl.generateMipmap(3553);
			state.unbindTexture();
		};

		this.initTexture = function (texture) {
			textures.setTexture2D(texture, 0);
			state.unbindTexture();
		};

		this.resetState = function () {
			state.reset();
			bindingStates.reset();
		};

		if (typeof __THREE_DEVTOOLS__ !== 'undefined') {
			__THREE_DEVTOOLS__.dispatchEvent(new CustomEvent('observe', {
				detail: this
			})); // eslint-disable-line no-undef

		}
	}

	function WebGL1Renderer(parameters) {
		WebGLRenderer.call(this, parameters);
	}

	WebGL1Renderer.prototype = Object.assign(Object.create(WebGLRenderer.prototype), {
		constructor: WebGL1Renderer,
		isWebGL1Renderer: true
	});

	var FogExp2 = /*#__PURE__*/function () {
		function FogExp2(color, density) {
			Object.defineProperty(this, 'isFogExp2', {
				value: true
			});
			this.name = '';
			this.color = new Color(color);
			this.density = density !== undefined ? density : 0.00025;
		}

		var _proto = FogExp2.prototype;

		_proto.clone = function clone() {
			return new FogExp2(this.color, this.density);
		};

		_proto.toJSON = function toJSON()
		/* meta */
		{
			return {
				type: 'FogExp2',
				color: this.color.getHex(),
				density: this.density
			};
		};

		return FogExp2;
	}();

	var Fog = /*#__PURE__*/function () {
		function Fog(color, near, far) {
			Object.defineProperty(this, 'isFog', {
				value: true
			});
			this.name = '';
			this.color = new Color(color);
			this.near = near !== undefined ? near : 1;
			this.far = far !== undefined ? far : 1000;
		}

		var _proto = Fog.prototype;

		_proto.clone = function clone() {
			return new Fog(this.color, this.near, this.far);
		};

		_proto.toJSON = function toJSON()
		/* meta */
		{
			return {
				type: 'Fog',
				color: this.color.getHex(),
				near: this.near,
				far: this.far
			};
		};

		return Fog;
	}();

	var Scene = /*#__PURE__*/function (_Object3D) {
		_inheritsLoose(Scene, _Object3D);

		function Scene() {
			var _this;

			_this = _Object3D.call(this) || this;
			Object.defineProperty(_assertThisInitialized(_this), 'isScene', {
				value: true
			});
			_this.type = 'Scene';
			_this.background = null;
			_this.environment = null;
			_this.fog = null;
			_this.overrideMaterial = null;
			_this.autoUpdate = true; // checked by the renderer

			if (typeof __THREE_DEVTOOLS__ !== 'undefined') {
				__THREE_DEVTOOLS__.dispatchEvent(new CustomEvent('observe', {
					detail: _assertThisInitialized(_this)
				})); // eslint-disable-line no-undef

			}

			return _this;
		}

		var _proto = Scene.prototype;

		_proto.copy = function copy(source, recursive) {
			_Object3D.prototype.copy.call(this, source, recursive);

			if (source.background !== null) this.background = source.background.clone();
			if (source.environment !== null) this.environment = source.environment.clone();
			if (source.fog !== null) this.fog = source.fog.clone();
			if (source.overrideMaterial !== null) this.overrideMaterial = source.overrideMaterial.clone();
			this.autoUpdate = source.autoUpdate;
			this.matrixAutoUpdate = source.matrixAutoUpdate;
			return this;
		};

		_proto.toJSON = function toJSON(meta) {
			var data = _Object3D.prototype.toJSON.call(this, meta);

			if (this.background !== null) data.object.background = this.background.toJSON(meta);
			if (this.environment !== null) data.object.environment = this.environment.toJSON(meta);
			if (this.fog !== null) data.object.fog = this.fog.toJSON();
			return data;
		};

		return Scene;
	}(Object3D);

	function InterleavedBuffer(array, stride) {
		this.array = array;
		this.stride = stride;
		this.count = array !== undefined ? array.length / stride : 0;
		this.usage = StaticDrawUsage;
		this.updateRange = {
			offset: 0,
			count: -1
		};
		this.version = 0;
		this.uuid = MathUtils.generateUUID();
	}

	Object.defineProperty(InterleavedBuffer.prototype, 'needsUpdate', {
		set: function set(value) {
			if (value === true) this.version++;
		}
	});
	Object.assign(InterleavedBuffer.prototype, {
		isInterleavedBuffer: true,
		onUploadCallback: function onUploadCallback() {},
		setUsage: function setUsage(value) {
			this.usage = value;
			return this;
		},
		copy: function copy(source) {
			this.array = new source.array.constructor(source.array);
			this.count = source.count;
			this.stride = source.stride;
			this.usage = source.usage;
			return this;
		},
		copyAt: function copyAt(index1, attribute, index2) {
			index1 *= this.stride;
			index2 *= attribute.stride;

			for (var i = 0, l = this.stride; i < l; i++) {
				this.array[index1 + i] = attribute.array[index2 + i];
			}

			return this;
		},
		set: function set(value, offset) {
			if (offset === void 0) {
				offset = 0;
			}

			this.array.set(value, offset);
			return this;
		},
		clone: function clone(data) {
			if (data.arrayBuffers === undefined) {
				data.arrayBuffers = {};
			}

			if (this.array.buffer._uuid === undefined) {
				this.array.buffer._uuid = MathUtils.generateUUID();
			}

			if (data.arrayBuffers[this.array.buffer._uuid] === undefined) {
				data.arrayBuffers[this.array.buffer._uuid] = this.array.slice(0).buffer;
			}

			var array = new this.array.constructor(data.arrayBuffers[this.array.buffer._uuid]);
			var ib = new InterleavedBuffer(array, this.stride);
			ib.setUsage(this.usage);
			return ib;
		},
		onUpload: function onUpload(callback) {
			this.onUploadCallback = callback;
			return this;
		},
		toJSON: function toJSON(data) {
			if (data.arrayBuffers === undefined) {
				data.arrayBuffers = {};
			} // generate UUID for array buffer if necessary


			if (this.array.buffer._uuid === undefined) {
				this.array.buffer._uuid = MathUtils.generateUUID();
			}

			if (data.arrayBuffers[this.array.buffer._uuid] === undefined) {
				data.arrayBuffers[this.array.buffer._uuid] = Array.prototype.slice.call(new Uint32Array(this.array.buffer));
			} //


			return {
				uuid: this.uuid,
				buffer: this.array.buffer._uuid,
				type: this.array.constructor.name,
				stride: this.stride
			};
		}
	});

	var _vector$6 = new Vector3();

	function InterleavedBufferAttribute(interleavedBuffer, itemSize, offset, normalized) {
		this.name = '';
		this.data = interleavedBuffer;
		this.itemSize = itemSize;
		this.offset = offset;
		this.normalized = normalized === true;
	}

	Object.defineProperties(InterleavedBufferAttribute.prototype, {
		count: {
			get: function get() {
				return this.data.count;
			}
		},
		array: {
			get: function get() {
				return this.data.array;
			}
		},
		needsUpdate: {
			set: function set(value) {
				this.data.needsUpdate = value;
			}
		}
	});
	Object.assign(InterleavedBufferAttribute.prototype, {
		isInterleavedBufferAttribute: true,
		applyMatrix4: function applyMatrix4(m) {
			for (var i = 0, l = this.data.count; i < l; i++) {
				_vector$6.x = this.getX(i);
				_vector$6.y = this.getY(i);
				_vector$6.z = this.getZ(i);

				_vector$6.applyMatrix4(m);

				this.setXYZ(i, _vector$6.x, _vector$6.y, _vector$6.z);
			}

			return this;
		},
		setX: function setX(index, x) {
			this.data.array[index * this.data.stride + this.offset] = x;
			return this;
		},
		setY: function setY(index, y) {
			this.data.array[index * this.data.stride + this.offset + 1] = y;
			return this;
		},
		setZ: function setZ(index, z) {
			this.data.array[index * this.data.stride + this.offset + 2] = z;
			return this;
		},
		setW: function setW(index, w) {
			this.data.array[index * this.data.stride + this.offset + 3] = w;
			return this;
		},
		getX: function getX(index) {
			return this.data.array[index * this.data.stride + this.offset];
		},
		getY: function getY(index) {
			return this.data.array[index * this.data.stride + this.offset + 1];
		},
		getZ: function getZ(index) {
			return this.data.array[index * this.data.stride + this.offset + 2];
		},
		getW: function getW(index) {
			return this.data.array[index * this.data.stride + this.offset + 3];
		},
		setXY: function setXY(index, x, y) {
			index = index * this.data.stride + this.offset;
			this.data.array[index + 0] = x;
			this.data.array[index + 1] = y;
			return this;
		},
		setXYZ: function setXYZ(index, x, y, z) {
			index = index * this.data.stride + this.offset;
			this.data.array[index + 0] = x;
			this.data.array[index + 1] = y;
			this.data.array[index + 2] = z;
			return this;
		},
		setXYZW: function setXYZW(index, x, y, z, w) {
			index = index * this.data.stride + this.offset;
			this.data.array[index + 0] = x;
			this.data.array[index + 1] = y;
			this.data.array[index + 2] = z;
			this.data.array[index + 3] = w;
			return this;
		},
		clone: function clone(data) {
			if (data === undefined) {
				console.log('THREE.InterleavedBufferAttribute.clone(): Cloning an interlaved buffer attribute will deinterleave buffer data.');
				var array = [];

				for (var i = 0; i < this.count; i++) {
					var index = i * this.data.stride + this.offset;

					for (var j = 0; j < this.itemSize; j++) {
						array.push(this.data.array[index + j]);
					}
				}

				return new BufferAttribute(new this.array.constructor(array), this.itemSize, this.normalized);
			} else {
				if (data.interleavedBuffers === undefined) {
					data.interleavedBuffers = {};
				}

				if (data.interleavedBuffers[this.data.uuid] === undefined) {
					data.interleavedBuffers[this.data.uuid] = this.data.clone(data);
				}

				return new InterleavedBufferAttribute(data.interleavedBuffers[this.data.uuid], this.itemSize, this.offset, this.normalized);
			}
		},
		toJSON: function toJSON(data) {
			if (data === undefined) {
				console.log('THREE.InterleavedBufferAttribute.toJSON(): Serializing an interlaved buffer attribute will deinterleave buffer data.');
				var array = [];

				for (var i = 0; i < this.count; i++) {
					var index = i * this.data.stride + this.offset;

					for (var j = 0; j < this.itemSize; j++) {
						array.push(this.data.array[index + j]);
					}
				} // deinterleave data and save it as an ordinary buffer attribute for now


				return {
					itemSize: this.itemSize,
					type: this.array.constructor.name,
					array: array,
					normalized: this.normalized
				};
			} else {
				// save as true interlaved attribtue
				if (data.interleavedBuffers === undefined) {
					data.interleavedBuffers = {};
				}

				if (data.interleavedBuffers[this.data.uuid] === undefined) {
					data.interleavedBuffers[this.data.uuid] = this.data.toJSON(data);
				}

				return {
					isInterleavedBufferAttribute: true,
					itemSize: this.itemSize,
					data: this.data.uuid,
					offset: this.offset,
					normalized: this.normalized
				};
			}
		}
	});

	/**
	 * parameters = {
	 *	color: <hex>,
	 *	map: new THREE.Texture( <Image> ),
	 *	alphaMap: new THREE.Texture( <Image> ),
	 *	rotation: <float>,
	 *	sizeAttenuation: <bool>
	 * }
	 */

	function SpriteMaterial(parameters) {
		Material.call(this);
		this.type = 'SpriteMaterial';
		this.color = new Color(0xffffff);
		this.map = null;
		this.alphaMap = null;
		this.rotation = 0;
		this.sizeAttenuation = true;
		this.transparent = true;
		this.setValues(parameters);
	}

	SpriteMaterial.prototype = Object.create(Material.prototype);
	SpriteMaterial.prototype.constructor = SpriteMaterial;
	SpriteMaterial.prototype.isSpriteMaterial = true;

	SpriteMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.color.copy(source.color);
		this.map = source.map;
		this.alphaMap = source.alphaMap;
		this.rotation = source.rotation;
		this.sizeAttenuation = source.sizeAttenuation;
		return this;
	};

	var _geometry;

	var _intersectPoint = new Vector3();

	var _worldScale = new Vector3();

	var _mvPosition = new Vector3();

	var _alignedPosition = new Vector2();

	var _rotatedPosition = new Vector2();

	var _viewWorldMatrix = new Matrix4();

	var _vA$1 = new Vector3();

	var _vB$1 = new Vector3();

	var _vC$1 = new Vector3();

	var _uvA$1 = new Vector2();

	var _uvB$1 = new Vector2();

	var _uvC$1 = new Vector2();

	function Sprite(material) {
		Object3D.call(this);
		this.type = 'Sprite';

		if (_geometry === undefined) {
			_geometry = new BufferGeometry();
			var float32Array = new Float32Array([-0.5, -0.5, 0, 0, 0, 0.5, -0.5, 0, 1, 0, 0.5, 0.5, 0, 1, 1, -0.5, 0.5, 0, 0, 1]);
			var interleavedBuffer = new InterleavedBuffer(float32Array, 5);

			_geometry.setIndex([0, 1, 2, 0, 2, 3]);

			_geometry.setAttribute('position', new InterleavedBufferAttribute(interleavedBuffer, 3, 0, false));

			_geometry.setAttribute('uv', new InterleavedBufferAttribute(interleavedBuffer, 2, 3, false));
		}

		this.geometry = _geometry;
		this.material = material !== undefined ? material : new SpriteMaterial();
		this.center = new Vector2(0.5, 0.5);
	}

	Sprite.prototype = Object.assign(Object.create(Object3D.prototype), {
		constructor: Sprite,
		isSprite: true,
		raycast: function raycast(raycaster, intersects) {
			if (raycaster.camera === null) {
				console.error('THREE.Sprite: "Raycaster.camera" needs to be set in order to raycast against sprites.');
			}

			_worldScale.setFromMatrixScale(this.matrixWorld);

			_viewWorldMatrix.copy(raycaster.camera.matrixWorld);

			this.modelViewMatrix.multiplyMatrices(raycaster.camera.matrixWorldInverse, this.matrixWorld);

			_mvPosition.setFromMatrixPosition(this.modelViewMatrix);

			if (raycaster.camera.isPerspectiveCamera && this.material.sizeAttenuation === false) {
				_worldScale.multiplyScalar(-_mvPosition.z);
			}

			var rotation = this.material.rotation;
			var sin, cos;

			if (rotation !== 0) {
				cos = Math.cos(rotation);
				sin = Math.sin(rotation);
			}

			var center = this.center;
			transformVertex(_vA$1.set(-0.5, -0.5, 0), _mvPosition, center, _worldScale, sin, cos);
			transformVertex(_vB$1.set(0.5, -0.5, 0), _mvPosition, center, _worldScale, sin, cos);
			transformVertex(_vC$1.set(0.5, 0.5, 0), _mvPosition, center, _worldScale, sin, cos);

			_uvA$1.set(0, 0);

			_uvB$1.set(1, 0);

			_uvC$1.set(1, 1); // check first triangle


			var intersect = raycaster.ray.intersectTriangle(_vA$1, _vB$1, _vC$1, false, _intersectPoint);

			if (intersect === null) {
				// check second triangle
				transformVertex(_vB$1.set(-0.5, 0.5, 0), _mvPosition, center, _worldScale, sin, cos);

				_uvB$1.set(0, 1);

				intersect = raycaster.ray.intersectTriangle(_vA$1, _vC$1, _vB$1, false, _intersectPoint);

				if (intersect === null) {
					return;
				}
			}

			var distance = raycaster.ray.origin.distanceTo(_intersectPoint);
			if (distance < raycaster.near || distance > raycaster.far) return;
			intersects.push({
				distance: distance,
				point: _intersectPoint.clone(),
				uv: Triangle.getUV(_intersectPoint, _vA$1, _vB$1, _vC$1, _uvA$1, _uvB$1, _uvC$1, new Vector2()),
				face: null,
				object: this
			});
		},
		copy: function copy(source) {
			Object3D.prototype.copy.call(this, source);
			if (source.center !== undefined) this.center.copy(source.center);
			this.material = source.material;
			return this;
		}
	});

	function transformVertex(vertexPosition, mvPosition, center, scale, sin, cos) {
		// compute position in camera space
		_alignedPosition.subVectors(vertexPosition, center).addScalar(0.5).multiply(scale); // to check if rotation is not zero


		if (sin !== undefined) {
			_rotatedPosition.x = cos * _alignedPosition.x - sin * _alignedPosition.y;
			_rotatedPosition.y = sin * _alignedPosition.x + cos * _alignedPosition.y;
		} else {
			_rotatedPosition.copy(_alignedPosition);
		}

		vertexPosition.copy(mvPosition);
		vertexPosition.x += _rotatedPosition.x;
		vertexPosition.y += _rotatedPosition.y; // transform to world space

		vertexPosition.applyMatrix4(_viewWorldMatrix);
	}

	var _v1$4 = new Vector3();

	var _v2$2 = new Vector3();

	function LOD() {
		Object3D.call(this);
		this._currentLevel = 0;
		this.type = 'LOD';
		Object.defineProperties(this, {
			levels: {
				enumerable: true,
				value: []
			}
		});
		this.autoUpdate = true;
	}

	LOD.prototype = Object.assign(Object.create(Object3D.prototype), {
		constructor: LOD,
		isLOD: true,
		copy: function copy(source) {
			Object3D.prototype.copy.call(this, source, false);
			var levels = source.levels;

			for (var i = 0, l = levels.length; i < l; i++) {
				var level = levels[i];
				this.addLevel(level.object.clone(), level.distance);
			}

			this.autoUpdate = source.autoUpdate;
			return this;
		},
		addLevel: function addLevel(object, distance) {
			if (distance === void 0) {
				distance = 0;
			}

			distance = Math.abs(distance);
			var levels = this.levels;
			var l;

			for (l = 0; l < levels.length; l++) {
				if (distance < levels[l].distance) {
					break;
				}
			}

			levels.splice(l, 0, {
				distance: distance,
				object: object
			});
			this.add(object);
			return this;
		},
		getCurrentLevel: function getCurrentLevel() {
			return this._currentLevel;
		},
		getObjectForDistance: function getObjectForDistance(distance) {
			var levels = this.levels;

			if (levels.length > 0) {
				var i, l;

				for (i = 1, l = levels.length; i < l; i++) {
					if (distance < levels[i].distance) {
						break;
					}
				}

				return levels[i - 1].object;
			}

			return null;
		},
		raycast: function raycast(raycaster, intersects) {
			var levels = this.levels;

			if (levels.length > 0) {
				_v1$4.setFromMatrixPosition(this.matrixWorld);

				var distance = raycaster.ray.origin.distanceTo(_v1$4);
				this.getObjectForDistance(distance).raycast(raycaster, intersects);
			}
		},
		update: function update(camera) {
			var levels = this.levels;

			if (levels.length > 1) {
				_v1$4.setFromMatrixPosition(camera.matrixWorld);

				_v2$2.setFromMatrixPosition(this.matrixWorld);

				var distance = _v1$4.distanceTo(_v2$2) / camera.zoom;
				levels[0].object.visible = true;
				var i, l;

				for (i = 1, l = levels.length; i < l; i++) {
					if (distance >= levels[i].distance) {
						levels[i - 1].object.visible = false;
						levels[i].object.visible = true;
					} else {
						break;
					}
				}

				this._currentLevel = i - 1;

				for (; i < l; i++) {
					levels[i].object.visible = false;
				}
			}
		},
		toJSON: function toJSON(meta) {
			var data = Object3D.prototype.toJSON.call(this, meta);
			if (this.autoUpdate === false) data.object.autoUpdate = false;
			data.object.levels = [];
			var levels = this.levels;

			for (var i = 0, l = levels.length; i < l; i++) {
				var level = levels[i];
				data.object.levels.push({
					object: level.object.uuid,
					distance: level.distance
				});
			}

			return data;
		}
	});

	var _basePosition = new Vector3();

	var _skinIndex = new Vector4();

	var _skinWeight = new Vector4();

	var _vector$7 = new Vector3();

	var _matrix$1 = new Matrix4();

	function SkinnedMesh(geometry, material) {
		if (geometry && geometry.isGeometry) {
			console.error('THREE.SkinnedMesh no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.');
		}

		Mesh.call(this, geometry, material);
		this.type = 'SkinnedMesh';
		this.bindMode = 'attached';
		this.bindMatrix = new Matrix4();
		this.bindMatrixInverse = new Matrix4();
	}

	SkinnedMesh.prototype = Object.assign(Object.create(Mesh.prototype), {
		constructor: SkinnedMesh,
		isSkinnedMesh: true,
		copy: function copy(source) {
			Mesh.prototype.copy.call(this, source);
			this.bindMode = source.bindMode;
			this.bindMatrix.copy(source.bindMatrix);
			this.bindMatrixInverse.copy(source.bindMatrixInverse);
			this.skeleton = source.skeleton;
			return this;
		},
		bind: function bind(skeleton, bindMatrix) {
			this.skeleton = skeleton;

			if (bindMatrix === undefined) {
				this.updateMatrixWorld(true);
				this.skeleton.calculateInverses();
				bindMatrix = this.matrixWorld;
			}

			this.bindMatrix.copy(bindMatrix);
			this.bindMatrixInverse.copy(bindMatrix).invert();
		},
		pose: function pose() {
			this.skeleton.pose();
		},
		normalizeSkinWeights: function normalizeSkinWeights() {
			var vector = new Vector4();
			var skinWeight = this.geometry.attributes.skinWeight;

			for (var i = 0, l = skinWeight.count; i < l; i++) {
				vector.x = skinWeight.getX(i);
				vector.y = skinWeight.getY(i);
				vector.z = skinWeight.getZ(i);
				vector.w = skinWeight.getW(i);
				var scale = 1.0 / vector.manhattanLength();

				if (scale !== Infinity) {
					vector.multiplyScalar(scale);
				} else {
					vector.set(1, 0, 0, 0); // do something reasonable
				}

				skinWeight.setXYZW(i, vector.x, vector.y, vector.z, vector.w);
			}
		},
		updateMatrixWorld: function updateMatrixWorld(force) {
			Mesh.prototype.updateMatrixWorld.call(this, force);

			if (this.bindMode === 'attached') {
				this.bindMatrixInverse.copy(this.matrixWorld).invert();
			} else if (this.bindMode === 'detached') {
				this.bindMatrixInverse.copy(this.bindMatrix).invert();
			} else {
				console.warn('THREE.SkinnedMesh: Unrecognized bindMode: ' + this.bindMode);
			}
		},
		boneTransform: function boneTransform(index, target) {
			var skeleton = this.skeleton;
			var geometry = this.geometry;

			_skinIndex.fromBufferAttribute(geometry.attributes.skinIndex, index);

			_skinWeight.fromBufferAttribute(geometry.attributes.skinWeight, index);

			_basePosition.fromBufferAttribute(geometry.attributes.position, index).applyMatrix4(this.bindMatrix);

			target.set(0, 0, 0);

			for (var i = 0; i < 4; i++) {
				var weight = _skinWeight.getComponent(i);

				if (weight !== 0) {
					var boneIndex = _skinIndex.getComponent(i);

					_matrix$1.multiplyMatrices(skeleton.bones[boneIndex].matrixWorld, skeleton.boneInverses[boneIndex]);

					target.addScaledVector(_vector$7.copy(_basePosition).applyMatrix4(_matrix$1), weight);
				}
			}

			return target.applyMatrix4(this.bindMatrixInverse);
		}
	});

	function Bone() {
		Object3D.call(this);
		this.type = 'Bone';
	}

	Bone.prototype = Object.assign(Object.create(Object3D.prototype), {
		constructor: Bone,
		isBone: true
	});

	var _offsetMatrix = new Matrix4();

	var _identityMatrix = new Matrix4();

	function Skeleton(bones, boneInverses) {
		if (bones === void 0) {
			bones = [];
		}

		if (boneInverses === void 0) {
			boneInverses = [];
		}

		this.uuid = MathUtils.generateUUID();
		this.bones = bones.slice(0);
		this.boneInverses = boneInverses;
		this.boneMatrices = null;
		this.boneTexture = null;
		this.boneTextureSize = 0;
		this.frame = -1;
		this.init();
	}

	Object.assign(Skeleton.prototype, {
		init: function init() {
			var bones = this.bones;
			var boneInverses = this.boneInverses;
			this.boneMatrices = new Float32Array(bones.length * 16); // calculate inverse bone matrices if necessary

			if (boneInverses.length === 0) {
				this.calculateInverses();
			} else {
				// handle special case
				if (bones.length !== boneInverses.length) {
					console.warn('THREE.Skeleton: Number of inverse bone matrices does not match amount of bones.');
					this.boneInverses = [];

					for (var i = 0, il = this.bones.length; i < il; i++) {
						this.boneInverses.push(new Matrix4());
					}
				}
			}
		},
		calculateInverses: function calculateInverses() {
			this.boneInverses.length = 0;

			for (var i = 0, il = this.bones.length; i < il; i++) {
				var inverse = new Matrix4();

				if (this.bones[i]) {
					inverse.copy(this.bones[i].matrixWorld).invert();
				}

				this.boneInverses.push(inverse);
			}
		},
		pose: function pose() {
			// recover the bind-time world matrices
			for (var i = 0, il = this.bones.length; i < il; i++) {
				var bone = this.bones[i];

				if (bone) {
					bone.matrixWorld.copy(this.boneInverses[i]).invert();
				}
			} // compute the local matrices, positions, rotations and scales


			for (var _i = 0, _il = this.bones.length; _i < _il; _i++) {
				var _bone = this.bones[_i];

				if (_bone) {
					if (_bone.parent && _bone.parent.isBone) {
						_bone.matrix.copy(_bone.parent.matrixWorld).invert();

						_bone.matrix.multiply(_bone.matrixWorld);
					} else {
						_bone.matrix.copy(_bone.matrixWorld);
					}

					_bone.matrix.decompose(_bone.position, _bone.quaternion, _bone.scale);
				}
			}
		},
		update: function update() {
			var bones = this.bones;
			var boneInverses = this.boneInverses;
			var boneMatrices = this.boneMatrices;
			var boneTexture = this.boneTexture; // flatten bone matrices to array

			for (var i = 0, il = bones.length; i < il; i++) {
				// compute the offset between the current and the original transform
				var matrix = bones[i] ? bones[i].matrixWorld : _identityMatrix;

				_offsetMatrix.multiplyMatrices(matrix, boneInverses[i]);

				_offsetMatrix.toArray(boneMatrices, i * 16);
			}

			if (boneTexture !== null) {
				boneTexture.needsUpdate = true;
			}
		},
		clone: function clone() {
			return new Skeleton(this.bones, this.boneInverses);
		},
		getBoneByName: function getBoneByName(name) {
			for (var i = 0, il = this.bones.length; i < il; i++) {
				var bone = this.bones[i];

				if (bone.name === name) {
					return bone;
				}
			}

			return undefined;
		},
		dispose: function dispose() {
			if (this.boneTexture !== null) {
				this.boneTexture.dispose();
				this.boneTexture = null;
			}
		},
		fromJSON: function fromJSON(json, bones) {
			this.uuid = json.uuid;

			for (var i = 0, l = json.bones.length; i < l; i++) {
				var uuid = json.bones[i];
				var bone = bones[uuid];

				if (bone === undefined) {
					console.warn('THREE.Skeleton: No bone found with UUID:', uuid);
					bone = new Bone();
				}

				this.bones.push(bone);
				this.boneInverses.push(new Matrix4().fromArray(json.boneInverses[i]));
			}

			this.init();
			return this;
		},
		toJSON: function toJSON() {
			var data = {
				metadata: {
					version: 4.5,
					type: 'Skeleton',
					generator: 'Skeleton.toJSON'
				},
				bones: [],
				boneInverses: []
			};
			data.uuid = this.uuid;
			var bones = this.bones;
			var boneInverses = this.boneInverses;

			for (var i = 0, l = bones.length; i < l; i++) {
				var bone = bones[i];
				data.bones.push(bone.uuid);
				var boneInverse = boneInverses[i];
				data.boneInverses.push(boneInverse.toArray());
			}

			return data;
		}
	});

	var _instanceLocalMatrix = new Matrix4();

	var _instanceWorldMatrix = new Matrix4();

	var _instanceIntersects = [];

	var _mesh = new Mesh();

	function InstancedMesh(geometry, material, count) {
		Mesh.call(this, geometry, material);
		this.instanceMatrix = new BufferAttribute(new Float32Array(count * 16), 16);
		this.instanceColor = null;
		this.count = count;
		this.frustumCulled = false;
	}

	InstancedMesh.prototype = Object.assign(Object.create(Mesh.prototype), {
		constructor: InstancedMesh,
		isInstancedMesh: true,
		copy: function copy(source) {
			Mesh.prototype.copy.call(this, source);
			this.instanceMatrix.copy(source.instanceMatrix);
			if (source.instanceColor !== null) this.instanceColor = source.instanceColor.clone();
			this.count = source.count;
			return this;
		},
		getColorAt: function getColorAt(index, color) {
			color.fromArray(this.instanceColor.array, index * 3);
		},
		getMatrixAt: function getMatrixAt(index, matrix) {
			matrix.fromArray(this.instanceMatrix.array, index * 16);
		},
		raycast: function raycast(raycaster, intersects) {
			var matrixWorld = this.matrixWorld;
			var raycastTimes = this.count;
			_mesh.geometry = this.geometry;
			_mesh.material = this.material;
			if (_mesh.material === undefined) return;

			for (var instanceId = 0; instanceId < raycastTimes; instanceId++) {
				// calculate the world matrix for each instance
				this.getMatrixAt(instanceId, _instanceLocalMatrix);

				_instanceWorldMatrix.multiplyMatrices(matrixWorld, _instanceLocalMatrix); // the mesh represents this single instance


				_mesh.matrixWorld = _instanceWorldMatrix;

				_mesh.raycast(raycaster, _instanceIntersects); // process the result of raycast


				for (var i = 0, l = _instanceIntersects.length; i < l; i++) {
					var intersect = _instanceIntersects[i];
					intersect.instanceId = instanceId;
					intersect.object = this;
					intersects.push(intersect);
				}

				_instanceIntersects.length = 0;
			}
		},
		setColorAt: function setColorAt(index, color) {
			if (this.instanceColor === null) {
				this.instanceColor = new BufferAttribute(new Float32Array(this.count * 3), 3);
			}

			color.toArray(this.instanceColor.array, index * 3);
		},
		setMatrixAt: function setMatrixAt(index, matrix) {
			matrix.toArray(this.instanceMatrix.array, index * 16);
		},
		updateMorphTargets: function updateMorphTargets() {},
		dispose: function dispose() {
			this.dispatchEvent({
				type: 'dispose'
			});
		}
	});

	/**
	 * parameters = {
	 *	color: <hex>,
	 *	opacity: <float>,
	 *
	 *	linewidth: <float>,
	 *	linecap: "round",
	 *	linejoin: "round"
	 * }
	 */

	function LineBasicMaterial(parameters) {
		Material.call(this);
		this.type = 'LineBasicMaterial';
		this.color = new Color(0xffffff);
		this.linewidth = 1;
		this.linecap = 'round';
		this.linejoin = 'round';
		this.morphTargets = false;
		this.setValues(parameters);
	}

	LineBasicMaterial.prototype = Object.create(Material.prototype);
	LineBasicMaterial.prototype.constructor = LineBasicMaterial;
	LineBasicMaterial.prototype.isLineBasicMaterial = true;

	LineBasicMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.color.copy(source.color);
		this.linewidth = source.linewidth;
		this.linecap = source.linecap;
		this.linejoin = source.linejoin;
		this.morphTargets = source.morphTargets;
		return this;
	};

	var _start = new Vector3();

	var _end = new Vector3();

	var _inverseMatrix$1 = new Matrix4();

	var _ray$1 = new Ray();

	var _sphere$2 = new Sphere();

	function Line(geometry, material) {
		if (geometry === void 0) {
			geometry = new BufferGeometry();
		}

		if (material === void 0) {
			material = new LineBasicMaterial();
		}

		Object3D.call(this);
		this.type = 'Line';
		this.geometry = geometry;
		this.material = material;
		this.updateMorphTargets();
	}

	Line.prototype = Object.assign(Object.create(Object3D.prototype), {
		constructor: Line,
		isLine: true,
		copy: function copy(source) {
			Object3D.prototype.copy.call(this, source);
			this.material = source.material;
			this.geometry = source.geometry;
			return this;
		},
		computeLineDistances: function computeLineDistances() {
			var geometry = this.geometry;

			if (geometry.isBufferGeometry) {
				// we assume non-indexed geometry
				if (geometry.index === null) {
					var positionAttribute = geometry.attributes.position;
					var lineDistances = [0];

					for (var i = 1, l = positionAttribute.count; i < l; i++) {
						_start.fromBufferAttribute(positionAttribute, i - 1);

						_end.fromBufferAttribute(positionAttribute, i);

						lineDistances[i] = lineDistances[i - 1];
						lineDistances[i] += _start.distanceTo(_end);
					}

					geometry.setAttribute('lineDistance', new Float32BufferAttribute(lineDistances, 1));
				} else {
					console.warn('THREE.Line.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.');
				}
			} else if (geometry.isGeometry) {
				console.error('THREE.Line.computeLineDistances() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.');
			}

			return this;
		},
		raycast: function raycast(raycaster, intersects) {
			var geometry = this.geometry;
			var matrixWorld = this.matrixWorld;
			var threshold = raycaster.params.Line.threshold; // Checking boundingSphere distance to ray

			if (geometry.boundingSphere === null) geometry.computeBoundingSphere();

			_sphere$2.copy(geometry.boundingSphere);

			_sphere$2.applyMatrix4(matrixWorld);

			_sphere$2.radius += threshold;
			if (raycaster.ray.intersectsSphere(_sphere$2) === false) return; //

			_inverseMatrix$1.copy(matrixWorld).invert();

			_ray$1.copy(raycaster.ray).applyMatrix4(_inverseMatrix$1);

			var localThreshold = threshold / ((this.scale.x + this.scale.y + this.scale.z) / 3);
			var localThresholdSq = localThreshold * localThreshold;
			var vStart = new Vector3();
			var vEnd = new Vector3();
			var interSegment = new Vector3();
			var interRay = new Vector3();
			var step = this.isLineSegments ? 2 : 1;

			if (geometry.isBufferGeometry) {
				var index = geometry.index;
				var attributes = geometry.attributes;
				var positionAttribute = attributes.position;

				if (index !== null) {
					var indices = index.array;

					for (var i = 0, l = indices.length - 1; i < l; i += step) {
						var a = indices[i];
						var b = indices[i + 1];
						vStart.fromBufferAttribute(positionAttribute, a);
						vEnd.fromBufferAttribute(positionAttribute, b);

						var distSq = _ray$1.distanceSqToSegment(vStart, vEnd, interRay, interSegment);

						if (distSq > localThresholdSq) continue;
						interRay.applyMatrix4(this.matrixWorld); //Move back to world space for distance calculation

						var distance = raycaster.ray.origin.distanceTo(interRay);
						if (distance < raycaster.near || distance > raycaster.far) continue;
						intersects.push({
							distance: distance,
							// What do we want? intersection point on the ray or on the segment??
							// point: raycaster.ray.at( distance ),
							point: interSegment.clone().applyMatrix4(this.matrixWorld),
							index: i,
							face: null,
							faceIndex: null,
							object: this
						});
					}
				} else {
					for (var _i = 0, _l = positionAttribute.count - 1; _i < _l; _i += step) {
						vStart.fromBufferAttribute(positionAttribute, _i);
						vEnd.fromBufferAttribute(positionAttribute, _i + 1);

						var _distSq = _ray$1.distanceSqToSegment(vStart, vEnd, interRay, interSegment);

						if (_distSq > localThresholdSq) continue;
						interRay.applyMatrix4(this.matrixWorld); //Move back to world space for distance calculation

						var _distance = raycaster.ray.origin.distanceTo(interRay);

						if (_distance < raycaster.near || _distance > raycaster.far) continue;
						intersects.push({
							distance: _distance,
							// What do we want? intersection point on the ray or on the segment??
							// point: raycaster.ray.at( distance ),
							point: interSegment.clone().applyMatrix4(this.matrixWorld),
							index: _i,
							face: null,
							faceIndex: null,
							object: this
						});
					}
				}
			} else if (geometry.isGeometry) {
				console.error('THREE.Line.raycast() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.');
			}
		},
		updateMorphTargets: function updateMorphTargets() {
			var geometry = this.geometry;

			if (geometry.isBufferGeometry) {
				var morphAttributes = geometry.morphAttributes;
				var keys = Object.keys(morphAttributes);

				if (keys.length > 0) {
					var morphAttribute = morphAttributes[keys[0]];

					if (morphAttribute !== undefined) {
						this.morphTargetInfluences = [];
						this.morphTargetDictionary = {};

						for (var m = 0, ml = morphAttribute.length; m < ml; m++) {
							var name = morphAttribute[m].name || String(m);
							this.morphTargetInfluences.push(0);
							this.morphTargetDictionary[name] = m;
						}
					}
				}
			} else {
				var morphTargets = geometry.morphTargets;

				if (morphTargets !== undefined && morphTargets.length > 0) {
					console.error('THREE.Line.updateMorphTargets() does not support THREE.Geometry. Use THREE.BufferGeometry instead.');
				}
			}
		}
	});

	var _start$1 = new Vector3();

	var _end$1 = new Vector3();

	function LineSegments(geometry, material) {
		Line.call(this, geometry, material);
		this.type = 'LineSegments';
	}

	LineSegments.prototype = Object.assign(Object.create(Line.prototype), {
		constructor: LineSegments,
		isLineSegments: true,
		computeLineDistances: function computeLineDistances() {
			var geometry = this.geometry;

			if (geometry.isBufferGeometry) {
				// we assume non-indexed geometry
				if (geometry.index === null) {
					var positionAttribute = geometry.attributes.position;
					var lineDistances = [];

					for (var i = 0, l = positionAttribute.count; i < l; i += 2) {
						_start$1.fromBufferAttribute(positionAttribute, i);

						_end$1.fromBufferAttribute(positionAttribute, i + 1);

						lineDistances[i] = i === 0 ? 0 : lineDistances[i - 1];
						lineDistances[i + 1] = lineDistances[i] + _start$1.distanceTo(_end$1);
					}

					geometry.setAttribute('lineDistance', new Float32BufferAttribute(lineDistances, 1));
				} else {
					console.warn('THREE.LineSegments.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.');
				}
			} else if (geometry.isGeometry) {
				console.error('THREE.LineSegments.computeLineDistances() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.');
			}

			return this;
		}
	});

	function LineLoop(geometry, material) {
		Line.call(this, geometry, material);
		this.type = 'LineLoop';
	}

	LineLoop.prototype = Object.assign(Object.create(Line.prototype), {
		constructor: LineLoop,
		isLineLoop: true
	});

	/**
	 * parameters = {
	 *	color: <hex>,
	 *	opacity: <float>,
	 *	map: new THREE.Texture( <Image> ),
	 *	alphaMap: new THREE.Texture( <Image> ),
	 *
	 *	size: <float>,
	 *	sizeAttenuation: <bool>
	 *
	 *	morphTargets: <bool>
	 * }
	 */

	function PointsMaterial(parameters) {
		Material.call(this);
		this.type = 'PointsMaterial';
		this.color = new Color(0xffffff);
		this.map = null;
		this.alphaMap = null;
		this.size = 1;
		this.sizeAttenuation = true;
		this.morphTargets = false;
		this.setValues(parameters);
	}

	PointsMaterial.prototype = Object.create(Material.prototype);
	PointsMaterial.prototype.constructor = PointsMaterial;
	PointsMaterial.prototype.isPointsMaterial = true;

	PointsMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.color.copy(source.color);
		this.map = source.map;
		this.alphaMap = source.alphaMap;
		this.size = source.size;
		this.sizeAttenuation = source.sizeAttenuation;
		this.morphTargets = source.morphTargets;
		return this;
	};

	var _inverseMatrix$2 = new Matrix4();

	var _ray$2 = new Ray();

	var _sphere$3 = new Sphere();

	var _position$1 = new Vector3();

	function Points(geometry, material) {
		if (geometry === void 0) {
			geometry = new BufferGeometry();
		}

		if (material === void 0) {
			material = new PointsMaterial();
		}

		Object3D.call(this);
		this.type = 'Points';
		this.geometry = geometry;
		this.material = material;
		this.updateMorphTargets();
	}

	Points.prototype = Object.assign(Object.create(Object3D.prototype), {
		constructor: Points,
		isPoints: true,
		copy: function copy(source) {
			Object3D.prototype.copy.call(this, source);
			this.material = source.material;
			this.geometry = source.geometry;
			return this;
		},
		raycast: function raycast(raycaster, intersects) {
			var geometry = this.geometry;
			var matrixWorld = this.matrixWorld;
			var threshold = raycaster.params.Points.threshold; // Checking boundingSphere distance to ray

			if (geometry.boundingSphere === null) geometry.computeBoundingSphere();

			_sphere$3.copy(geometry.boundingSphere);

			_sphere$3.applyMatrix4(matrixWorld);

			_sphere$3.radius += threshold;
			if (raycaster.ray.intersectsSphere(_sphere$3) === false) return; //

			_inverseMatrix$2.copy(matrixWorld).invert();

			_ray$2.copy(raycaster.ray).applyMatrix4(_inverseMatrix$2);

			var localThreshold = threshold / ((this.scale.x + this.scale.y + this.scale.z) / 3);
			var localThresholdSq = localThreshold * localThreshold;

			if (geometry.isBufferGeometry) {
				var index = geometry.index;
				var attributes = geometry.attributes;
				var positionAttribute = attributes.position;

				if (index !== null) {
					var indices = index.array;

					for (var i = 0, il = indices.length; i < il; i++) {
						var a = indices[i];

						_position$1.fromBufferAttribute(positionAttribute, a);

						testPoint(_position$1, a, localThresholdSq, matrixWorld, raycaster, intersects, this);
					}
				} else {
					for (var _i = 0, l = positionAttribute.count; _i < l; _i++) {
						_position$1.fromBufferAttribute(positionAttribute, _i);

						testPoint(_position$1, _i, localThresholdSq, matrixWorld, raycaster, intersects, this);
					}
				}
			} else {
				console.error('THREE.Points.raycast() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.');
			}
		},
		updateMorphTargets: function updateMorphTargets() {
			var geometry = this.geometry;

			if (geometry.isBufferGeometry) {
				var morphAttributes = geometry.morphAttributes;
				var keys = Object.keys(morphAttributes);

				if (keys.length > 0) {
					var morphAttribute = morphAttributes[keys[0]];

					if (morphAttribute !== undefined) {
						this.morphTargetInfluences = [];
						this.morphTargetDictionary = {};

						for (var m = 0, ml = morphAttribute.length; m < ml; m++) {
							var name = morphAttribute[m].name || String(m);
							this.morphTargetInfluences.push(0);
							this.morphTargetDictionary[name] = m;
						}
					}
				}
			} else {
				var morphTargets = geometry.morphTargets;

				if (morphTargets !== undefined && morphTargets.length > 0) {
					console.error('THREE.Points.updateMorphTargets() does not support THREE.Geometry. Use THREE.BufferGeometry instead.');
				}
			}
		}
	});

	function testPoint(point, index, localThresholdSq, matrixWorld, raycaster, intersects, object) {
		var rayPointDistanceSq = _ray$2.distanceSqToPoint(point);

		if (rayPointDistanceSq < localThresholdSq) {
			var intersectPoint = new Vector3();

			_ray$2.closestPointToPoint(point, intersectPoint);

			intersectPoint.applyMatrix4(matrixWorld);
			var distance = raycaster.ray.origin.distanceTo(intersectPoint);
			if (distance < raycaster.near || distance > raycaster.far) return;
			intersects.push({
				distance: distance,
				distanceToRay: Math.sqrt(rayPointDistanceSq),
				point: intersectPoint,
				index: index,
				face: null,
				object: object
			});
		}
	}

	function VideoTexture(video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy) {
		Texture.call(this, video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);
		this.format = format !== undefined ? format : RGBFormat;
		this.minFilter = minFilter !== undefined ? minFilter : LinearFilter;
		this.magFilter = magFilter !== undefined ? magFilter : LinearFilter;
		this.generateMipmaps = false;
		var scope = this;

		function updateVideo() {
			scope.needsUpdate = true;
			video.requestVideoFrameCallback(updateVideo);
		}

		if ('requestVideoFrameCallback' in video) {
			video.requestVideoFrameCallback(updateVideo);
		}
	}

	VideoTexture.prototype = Object.assign(Object.create(Texture.prototype), {
		constructor: VideoTexture,
		clone: function clone() {
			return new this.constructor(this.image).copy(this);
		},
		isVideoTexture: true,
		update: function update() {
			var video = this.image;
			var hasVideoFrameCallback = ('requestVideoFrameCallback' in video);

			if (hasVideoFrameCallback === false && video.readyState >= video.HAVE_CURRENT_DATA) {
				this.needsUpdate = true;
			}
		}
	});

	function CompressedTexture(mipmaps, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding) {
		Texture.call(this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding);
		this.image = {
			width: width,
			height: height
		};
		this.mipmaps = mipmaps; // no flipping for cube textures
		// (also flipping doesn't work for compressed textures )

		this.flipY = false; // can't generate mipmaps for compressed textures
		// mips must be embedded in DDS files

		this.generateMipmaps = false;
	}

	CompressedTexture.prototype = Object.create(Texture.prototype);
	CompressedTexture.prototype.constructor = CompressedTexture;
	CompressedTexture.prototype.isCompressedTexture = true;

	function CanvasTexture(canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy) {
		Texture.call(this, canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);
		this.needsUpdate = true;
	}

	CanvasTexture.prototype = Object.create(Texture.prototype);
	CanvasTexture.prototype.constructor = CanvasTexture;
	CanvasTexture.prototype.isCanvasTexture = true;

	function DepthTexture(width, height, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, format) {
		format = format !== undefined ? format : DepthFormat;

		if (format !== DepthFormat && format !== DepthStencilFormat) {
			throw new Error('DepthTexture format must be either THREE.DepthFormat or THREE.DepthStencilFormat');
		}

		if (type === undefined && format === DepthFormat) type = UnsignedShortType;
		if (type === undefined && format === DepthStencilFormat) type = UnsignedInt248Type;
		Texture.call(this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);
		this.image = {
			width: width,
			height: height
		};
		this.magFilter = magFilter !== undefined ? magFilter : NearestFilter;
		this.minFilter = minFilter !== undefined ? minFilter : NearestFilter;
		this.flipY = false;
		this.generateMipmaps = false;
	}

	DepthTexture.prototype = Object.create(Texture.prototype);
	DepthTexture.prototype.constructor = DepthTexture;
	DepthTexture.prototype.isDepthTexture = true;

	var CircleGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(CircleGeometry, _BufferGeometry);

		function CircleGeometry(radius, segments, thetaStart, thetaLength) {
			var _this;

			if (radius === void 0) {
				radius = 1;
			}

			if (segments === void 0) {
				segments = 8;
			}

			if (thetaStart === void 0) {
				thetaStart = 0;
			}

			if (thetaLength === void 0) {
				thetaLength = Math.PI * 2;
			}

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'CircleGeometry';
			_this.parameters = {
				radius: radius,
				segments: segments,
				thetaStart: thetaStart,
				thetaLength: thetaLength
			};
			segments = Math.max(3, segments); // buffers

			var indices = [];
			var vertices = [];
			var normals = [];
			var uvs = []; // helper variables

			var vertex = new Vector3();
			var uv = new Vector2(); // center point

			vertices.push(0, 0, 0);
			normals.push(0, 0, 1);
			uvs.push(0.5, 0.5);

			for (var s = 0, i = 3; s <= segments; s++, i += 3) {
				var segment = thetaStart + s / segments * thetaLength; // vertex

				vertex.x = radius * Math.cos(segment);
				vertex.y = radius * Math.sin(segment);
				vertices.push(vertex.x, vertex.y, vertex.z); // normal

				normals.push(0, 0, 1); // uvs

				uv.x = (vertices[i] / radius + 1) / 2;
				uv.y = (vertices[i + 1] / radius + 1) / 2;
				uvs.push(uv.x, uv.y);
			} // indices


			for (var _i = 1; _i <= segments; _i++) {
				indices.push(_i, _i + 1, 0);
			} // build geometry


			_this.setIndex(indices);

			_this.setAttribute('position', new Float32BufferAttribute(vertices, 3));

			_this.setAttribute('normal', new Float32BufferAttribute(normals, 3));

			_this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));

			return _this;
		}

		return CircleGeometry;
	}(BufferGeometry);

	var CylinderGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(CylinderGeometry, _BufferGeometry);

		function CylinderGeometry(radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength) {
			var _this;

			if (radiusTop === void 0) {
				radiusTop = 1;
			}

			if (radiusBottom === void 0) {
				radiusBottom = 1;
			}

			if (height === void 0) {
				height = 1;
			}

			if (radialSegments === void 0) {
				radialSegments = 8;
			}

			if (heightSegments === void 0) {
				heightSegments = 1;
			}

			if (openEnded === void 0) {
				openEnded = false;
			}

			if (thetaStart === void 0) {
				thetaStart = 0;
			}

			if (thetaLength === void 0) {
				thetaLength = Math.PI * 2;
			}

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'CylinderGeometry';
			_this.parameters = {
				radiusTop: radiusTop,
				radiusBottom: radiusBottom,
				height: height,
				radialSegments: radialSegments,
				heightSegments: heightSegments,
				openEnded: openEnded,
				thetaStart: thetaStart,
				thetaLength: thetaLength
			};

			var scope = _assertThisInitialized(_this);

			radialSegments = Math.floor(radialSegments);
			heightSegments = Math.floor(heightSegments); // buffers

			var indices = [];
			var vertices = [];
			var normals = [];
			var uvs = []; // helper variables

			var index = 0;
			var indexArray = [];
			var halfHeight = height / 2;
			var groupStart = 0; // generate geometry

			generateTorso();

			if (openEnded === false) {
				if (radiusTop > 0) generateCap(true);
				if (radiusBottom > 0) generateCap(false);
			} // build geometry


			_this.setIndex(indices);

			_this.setAttribute('position', new Float32BufferAttribute(vertices, 3));

			_this.setAttribute('normal', new Float32BufferAttribute(normals, 3));

			_this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));

			function generateTorso() {
				var normal = new Vector3();
				var vertex = new Vector3();
				var groupCount = 0; // this will be used to calculate the normal

				var slope = (radiusBottom - radiusTop) / height; // generate vertices, normals and uvs

				for (var y = 0; y <= heightSegments; y++) {
					var indexRow = [];
					var v = y / heightSegments; // calculate the radius of the current row

					var radius = v * (radiusBottom - radiusTop) + radiusTop;

					for (var x = 0; x <= radialSegments; x++) {
						var u = x / radialSegments;
						var theta = u * thetaLength + thetaStart;
						var sinTheta = Math.sin(theta);
						var cosTheta = Math.cos(theta); // vertex

						vertex.x = radius * sinTheta;
						vertex.y = -v * height + halfHeight;
						vertex.z = radius * cosTheta;
						vertices.push(vertex.x, vertex.y, vertex.z); // normal

						normal.set(sinTheta, slope, cosTheta).normalize();
						normals.push(normal.x, normal.y, normal.z); // uv

						uvs.push(u, 1 - v); // save index of vertex in respective row

						indexRow.push(index++);
					} // now save vertices of the row in our index array


					indexArray.push(indexRow);
				} // generate indices


				for (var _x = 0; _x < radialSegments; _x++) {
					for (var _y = 0; _y < heightSegments; _y++) {
						// we use the index array to access the correct indices
						var a = indexArray[_y][_x];
						var b = indexArray[_y + 1][_x];
						var c = indexArray[_y + 1][_x + 1];
						var d = indexArray[_y][_x + 1]; // faces

						indices.push(a, b, d);
						indices.push(b, c, d); // update group counter

						groupCount += 6;
					}
				} // add a group to the geometry. this will ensure multi material support


				scope.addGroup(groupStart, groupCount, 0); // calculate new start value for groups

				groupStart += groupCount;
			}

			function generateCap(top) {
				// save the index of the first center vertex
				var centerIndexStart = index;
				var uv = new Vector2();
				var vertex = new Vector3();
				var groupCount = 0;
				var radius = top === true ? radiusTop : radiusBottom;
				var sign = top === true ? 1 : -1; // first we generate the center vertex data of the cap.
				// because the geometry needs one set of uvs per face,
				// we must generate a center vertex per face/segment

				for (var x = 1; x <= radialSegments; x++) {
					// vertex
					vertices.push(0, halfHeight * sign, 0); // normal

					normals.push(0, sign, 0); // uv

					uvs.push(0.5, 0.5); // increase index

					index++;
				} // save the index of the last center vertex


				var centerIndexEnd = index; // now we generate the surrounding vertices, normals and uvs

				for (var _x2 = 0; _x2 <= radialSegments; _x2++) {
					var u = _x2 / radialSegments;
					var theta = u * thetaLength + thetaStart;
					var cosTheta = Math.cos(theta);
					var sinTheta = Math.sin(theta); // vertex

					vertex.x = radius * sinTheta;
					vertex.y = halfHeight * sign;
					vertex.z = radius * cosTheta;
					vertices.push(vertex.x, vertex.y, vertex.z); // normal

					normals.push(0, sign, 0); // uv

					uv.x = cosTheta * 0.5 + 0.5;
					uv.y = sinTheta * 0.5 * sign + 0.5;
					uvs.push(uv.x, uv.y); // increase index

					index++;
				} // generate indices


				for (var _x3 = 0; _x3 < radialSegments; _x3++) {
					var c = centerIndexStart + _x3;
					var i = centerIndexEnd + _x3;

					if (top === true) {
						// face top
						indices.push(i, i + 1, c);
					} else {
						// face bottom
						indices.push(i + 1, i, c);
					}

					groupCount += 3;
				} // add a group to the geometry. this will ensure multi material support


				scope.addGroup(groupStart, groupCount, top === true ? 1 : 2); // calculate new start value for groups

				groupStart += groupCount;
			}

			return _this;
		}

		return CylinderGeometry;
	}(BufferGeometry);

	var ConeGeometry = /*#__PURE__*/function (_CylinderGeometry) {
		_inheritsLoose(ConeGeometry, _CylinderGeometry);

		function ConeGeometry(radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength) {
			var _this;

			if (radius === void 0) {
				radius = 1;
			}

			if (height === void 0) {
				height = 1;
			}

			if (radialSegments === void 0) {
				radialSegments = 8;
			}

			if (heightSegments === void 0) {
				heightSegments = 1;
			}

			if (openEnded === void 0) {
				openEnded = false;
			}

			if (thetaStart === void 0) {
				thetaStart = 0;
			}

			if (thetaLength === void 0) {
				thetaLength = Math.PI * 2;
			}

			_this = _CylinderGeometry.call(this, 0, radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength) || this;
			_this.type = 'ConeGeometry';
			_this.parameters = {
				radius: radius,
				height: height,
				radialSegments: radialSegments,
				heightSegments: heightSegments,
				openEnded: openEnded,
				thetaStart: thetaStart,
				thetaLength: thetaLength
			};
			return _this;
		}

		return ConeGeometry;
	}(CylinderGeometry);

	var PolyhedronGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(PolyhedronGeometry, _BufferGeometry);

		function PolyhedronGeometry(vertices, indices, radius, detail) {
			var _this;

			if (radius === void 0) {
				radius = 1;
			}

			if (detail === void 0) {
				detail = 0;
			}

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'PolyhedronGeometry';
			_this.parameters = {
				vertices: vertices,
				indices: indices,
				radius: radius,
				detail: detail
			}; // default buffer data

			var vertexBuffer = [];
			var uvBuffer = []; // the subdivision creates the vertex buffer data

			subdivide(detail); // all vertices should lie on a conceptual sphere with a given radius

			applyRadius(radius); // finally, create the uv data

			generateUVs(); // build non-indexed geometry

			_this.setAttribute('position', new Float32BufferAttribute(vertexBuffer, 3));

			_this.setAttribute('normal', new Float32BufferAttribute(vertexBuffer.slice(), 3));

			_this.setAttribute('uv', new Float32BufferAttribute(uvBuffer, 2));

			if (detail === 0) {
				_this.computeVertexNormals(); // flat normals

			} else {
				_this.normalizeNormals(); // smooth normals

			} // helper functions


			function subdivide(detail) {
				var a = new Vector3();
				var b = new Vector3();
				var c = new Vector3(); // iterate over all faces and apply a subdivison with the given detail value

				for (var i = 0; i < indices.length; i += 3) {
					// get the vertices of the face
					getVertexByIndex(indices[i + 0], a);
					getVertexByIndex(indices[i + 1], b);
					getVertexByIndex(indices[i + 2], c); // perform subdivision

					subdivideFace(a, b, c, detail);
				}
			}

			function subdivideFace(a, b, c, detail) {
				var cols = detail + 1; // we use this multidimensional array as a data structure for creating the subdivision

				var v = []; // construct all of the vertices for this subdivision

				for (var i = 0; i <= cols; i++) {
					v[i] = [];
					var aj = a.clone().lerp(c, i / cols);
					var bj = b.clone().lerp(c, i / cols);
					var rows = cols - i;

					for (var j = 0; j <= rows; j++) {
						if (j === 0 && i === cols) {
							v[i][j] = aj;
						} else {
							v[i][j] = aj.clone().lerp(bj, j / rows);
						}
					}
				} // construct all of the faces


				for (var _i = 0; _i < cols; _i++) {
					for (var _j = 0; _j < 2 * (cols - _i) - 1; _j++) {
						var k = Math.floor(_j / 2);

						if (_j % 2 === 0) {
							pushVertex(v[_i][k + 1]);
							pushVertex(v[_i + 1][k]);
							pushVertex(v[_i][k]);
						} else {
							pushVertex(v[_i][k + 1]);
							pushVertex(v[_i + 1][k + 1]);
							pushVertex(v[_i + 1][k]);
						}
					}
				}
			}

			function applyRadius(radius) {
				var vertex = new Vector3(); // iterate over the entire buffer and apply the radius to each vertex

				for (var i = 0; i < vertexBuffer.length; i += 3) {
					vertex.x = vertexBuffer[i + 0];
					vertex.y = vertexBuffer[i + 1];
					vertex.z = vertexBuffer[i + 2];
					vertex.normalize().multiplyScalar(radius);
					vertexBuffer[i + 0] = vertex.x;
					vertexBuffer[i + 1] = vertex.y;
					vertexBuffer[i + 2] = vertex.z;
				}
			}

			function generateUVs() {
				var vertex = new Vector3();

				for (var i = 0; i < vertexBuffer.length; i += 3) {
					vertex.x = vertexBuffer[i + 0];
					vertex.y = vertexBuffer[i + 1];
					vertex.z = vertexBuffer[i + 2];
					var u = azimuth(vertex) / 2 / Math.PI + 0.5;
					var v = inclination(vertex) / Math.PI + 0.5;
					uvBuffer.push(u, 1 - v);
				}

				correctUVs();
				correctSeam();
			}

			function correctSeam() {
				// handle case when face straddles the seam, see #3269
				for (var i = 0; i < uvBuffer.length; i += 6) {
					// uv data of a single face
					var x0 = uvBuffer[i + 0];
					var x1 = uvBuffer[i + 2];
					var x2 = uvBuffer[i + 4];
					var max = Math.max(x0, x1, x2);
					var min = Math.min(x0, x1, x2); // 0.9 is somewhat arbitrary

					if (max > 0.9 && min < 0.1) {
						if (x0 < 0.2) uvBuffer[i + 0] += 1;
						if (x1 < 0.2) uvBuffer[i + 2] += 1;
						if (x2 < 0.2) uvBuffer[i + 4] += 1;
					}
				}
			}

			function pushVertex(vertex) {
				vertexBuffer.push(vertex.x, vertex.y, vertex.z);
			}

			function getVertexByIndex(index, vertex) {
				var stride = index * 3;
				vertex.x = vertices[stride + 0];
				vertex.y = vertices[stride + 1];
				vertex.z = vertices[stride + 2];
			}

			function correctUVs() {
				var a = new Vector3();
				var b = new Vector3();
				var c = new Vector3();
				var centroid = new Vector3();
				var uvA = new Vector2();
				var uvB = new Vector2();
				var uvC = new Vector2();

				for (var i = 0, j = 0; i < vertexBuffer.length; i += 9, j += 6) {
					a.set(vertexBuffer[i + 0], vertexBuffer[i + 1], vertexBuffer[i + 2]);
					b.set(vertexBuffer[i + 3], vertexBuffer[i + 4], vertexBuffer[i + 5]);
					c.set(vertexBuffer[i + 6], vertexBuffer[i + 7], vertexBuffer[i + 8]);
					uvA.set(uvBuffer[j + 0], uvBuffer[j + 1]);
					uvB.set(uvBuffer[j + 2], uvBuffer[j + 3]);
					uvC.set(uvBuffer[j + 4], uvBuffer[j + 5]);
					centroid.copy(a).add(b).add(c).divideScalar(3);
					var azi = azimuth(centroid);
					correctUV(uvA, j + 0, a, azi);
					correctUV(uvB, j + 2, b, azi);
					correctUV(uvC, j + 4, c, azi);
				}
			}

			function correctUV(uv, stride, vector, azimuth) {
				if (azimuth < 0 && uv.x === 1) {
					uvBuffer[stride] = uv.x - 1;
				}

				if (vector.x === 0 && vector.z === 0) {
					uvBuffer[stride] = azimuth / 2 / Math.PI + 0.5;
				}
			} // Angle around the Y axis, counter-clockwise when looking from above.


			function azimuth(vector) {
				return Math.atan2(vector.z, -vector.x);
			} // Angle above the XZ plane.


			function inclination(vector) {
				return Math.atan2(-vector.y, Math.sqrt(vector.x * vector.x + vector.z * vector.z));
			}

			return _this;
		}

		return PolyhedronGeometry;
	}(BufferGeometry);

	var DodecahedronGeometry = /*#__PURE__*/function (_PolyhedronGeometry) {
		_inheritsLoose(DodecahedronGeometry, _PolyhedronGeometry);

		function DodecahedronGeometry(radius, detail) {
			var _this;

			if (radius === void 0) {
				radius = 1;
			}

			if (detail === void 0) {
				detail = 0;
			}

			var t = (1 + Math.sqrt(5)) / 2;
			var r = 1 / t;
			var vertices = [// (±1, ±1, ±1)
			-1, -1, -1, -1, -1, 1, -1, 1, -1, -1, 1, 1, 1, -1, -1, 1, -1, 1, 1, 1, -1, 1, 1, 1, // (0, ±1/φ, ±φ)
			0, -r, -t, 0, -r, t, 0, r, -t, 0, r, t, // (±1/φ, ±φ, 0)
			-r, -t, 0, -r, t, 0, r, -t, 0, r, t, 0, // (±φ, 0, ±1/φ)
			-t, 0, -r, t, 0, -r, -t, 0, r, t, 0, r];
			var indices = [3, 11, 7, 3, 7, 15, 3, 15, 13, 7, 19, 17, 7, 17, 6, 7, 6, 15, 17, 4, 8, 17, 8, 10, 17, 10, 6, 8, 0, 16, 8, 16, 2, 8, 2, 10, 0, 12, 1, 0, 1, 18, 0, 18, 16, 6, 10, 2, 6, 2, 13, 6, 13, 15, 2, 16, 18, 2, 18, 3, 2, 3, 13, 18, 1, 9, 18, 9, 11, 18, 11, 3, 4, 14, 12, 4, 12, 0, 4, 0, 8, 11, 9, 5, 11, 5, 19, 11, 19, 7, 19, 5, 14, 19, 14, 4, 19, 4, 17, 1, 12, 14, 1, 14, 5, 1, 5, 9];
			_this = _PolyhedronGeometry.call(this, vertices, indices, radius, detail) || this;
			_this.type = 'DodecahedronGeometry';
			_this.parameters = {
				radius: radius,
				detail: detail
			};
			return _this;
		}

		return DodecahedronGeometry;
	}(PolyhedronGeometry);

	var _v0$2 = new Vector3();

	var _v1$5 = new Vector3();

	var _normal$1 = new Vector3();

	var _triangle = new Triangle();

	var EdgesGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(EdgesGeometry, _BufferGeometry);

		function EdgesGeometry(geometry, thresholdAngle) {
			var _this;

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'EdgesGeometry';
			_this.parameters = {
				thresholdAngle: thresholdAngle
			};
			thresholdAngle = thresholdAngle !== undefined ? thresholdAngle : 1;

			if (geometry.isGeometry === true) {
				console.error('THREE.EdgesGeometry no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.');
				return _assertThisInitialized(_this);
			}

			var precisionPoints = 4;
			var precision = Math.pow(10, precisionPoints);
			var thresholdDot = Math.cos(MathUtils.DEG2RAD * thresholdAngle);
			var indexAttr = geometry.getIndex();
			var positionAttr = geometry.getAttribute('position');
			var indexCount = indexAttr ? indexAttr.count : positionAttr.count;
			var indexArr = [0, 0, 0];
			var vertKeys = ['a', 'b', 'c'];
			var hashes = new Array(3);
			var edgeData = {};
			var vertices = [];

			for (var i = 0; i < indexCount; i += 3) {
				if (indexAttr) {
					indexArr[0] = indexAttr.getX(i);
					indexArr[1] = indexAttr.getX(i + 1);
					indexArr[2] = indexAttr.getX(i + 2);
				} else {
					indexArr[0] = i;
					indexArr[1] = i + 1;
					indexArr[2] = i + 2;
				}

				var a = _triangle.a,
						b = _triangle.b,
						c = _triangle.c;
				a.fromBufferAttribute(positionAttr, indexArr[0]);
				b.fromBufferAttribute(positionAttr, indexArr[1]);
				c.fromBufferAttribute(positionAttr, indexArr[2]);

				_triangle.getNormal(_normal$1); // create hashes for the edge from the vertices


				hashes[0] = Math.round(a.x * precision) + "," + Math.round(a.y * precision) + "," + Math.round(a.z * precision);
				hashes[1] = Math.round(b.x * precision) + "," + Math.round(b.y * precision) + "," + Math.round(b.z * precision);
				hashes[2] = Math.round(c.x * precision) + "," + Math.round(c.y * precision) + "," + Math.round(c.z * precision); // skip degenerate triangles

				if (hashes[0] === hashes[1] || hashes[1] === hashes[2] || hashes[2] === hashes[0]) {
					continue;
				} // iterate over every edge


				for (var j = 0; j < 3; j++) {
					// get the first and next vertex making up the edge
					var jNext = (j + 1) % 3;
					var vecHash0 = hashes[j];
					var vecHash1 = hashes[jNext];
					var v0 = _triangle[vertKeys[j]];
					var v1 = _triangle[vertKeys[jNext]];
					var hash = vecHash0 + "_" + vecHash1;
					var reverseHash = vecHash1 + "_" + vecHash0;

					if (reverseHash in edgeData && edgeData[reverseHash]) {
						// if we found a sibling edge add it into the vertex array if
						// it meets the angle threshold and delete the edge from the map.
						if (_normal$1.dot(edgeData[reverseHash].normal) <= thresholdDot) {
							vertices.push(v0.x, v0.y, v0.z);
							vertices.push(v1.x, v1.y, v1.z);
						}

						edgeData[reverseHash] = null;
					} else if (!(hash in edgeData)) {
						// if we've already got an edge here then skip adding a new one
						edgeData[hash] = {
							index0: indexArr[j],
							index1: indexArr[jNext],
							normal: _normal$1.clone()
						};
					}
				}
			} // iterate over all remaining, unmatched edges and add them to the vertex array


			for (var key in edgeData) {
				if (edgeData[key]) {
					var _edgeData$key = edgeData[key],
							index0 = _edgeData$key.index0,
							index1 = _edgeData$key.index1;

					_v0$2.fromBufferAttribute(positionAttr, index0);

					_v1$5.fromBufferAttribute(positionAttr, index1);

					vertices.push(_v0$2.x, _v0$2.y, _v0$2.z);
					vertices.push(_v1$5.x, _v1$5.y, _v1$5.z);
				}
			}

			_this.setAttribute('position', new Float32BufferAttribute(vertices, 3));

			return _this;
		}

		return EdgesGeometry;
	}(BufferGeometry);

	/**
	 * Port from https://github.com/mapbox/earcut (v2.2.2)
	 */
	var Earcut = {
		triangulate: function triangulate(data, holeIndices, dim) {
			dim = dim || 2;
			var hasHoles = holeIndices && holeIndices.length;
			var outerLen = hasHoles ? holeIndices[0] * dim : data.length;
			var outerNode = linkedList(data, 0, outerLen, dim, true);
			var triangles = [];
			if (!outerNode || outerNode.next === outerNode.prev) return triangles;
			var minX, minY, maxX, maxY, x, y, invSize;
			if (hasHoles) outerNode = eliminateHoles(data, holeIndices, outerNode, dim); // if the shape is not too simple, we'll use z-order curve hash later; calculate polygon bbox

			if (data.length > 80 * dim) {
				minX = maxX = data[0];
				minY = maxY = data[1];

				for (var i = dim; i < outerLen; i += dim) {
					x = data[i];
					y = data[i + 1];
					if (x < minX) minX = x;
					if (y < minY) minY = y;
					if (x > maxX) maxX = x;
					if (y > maxY) maxY = y;
				} // minX, minY and invSize are later used to transform coords into integers for z-order calculation


				invSize = Math.max(maxX - minX, maxY - minY);
				invSize = invSize !== 0 ? 1 / invSize : 0;
			}

			earcutLinked(outerNode, triangles, dim, minX, minY, invSize);
			return triangles;
		}
	}; // create a circular doubly linked list from polygon points in the specified winding order

	function linkedList(data, start, end, dim, clockwise) {
		var i, last;

		if (clockwise === signedArea(data, start, end, dim) > 0) {
			for (i = start; i < end; i += dim) {
				last = insertNode(i, data[i], data[i + 1], last);
			}
		} else {
			for (i = end - dim; i >= start; i -= dim) {
				last = insertNode(i, data[i], data[i + 1], last);
			}
		}

		if (last && equals(last, last.next)) {
			removeNode(last);
			last = last.next;
		}

		return last;
	} // eliminate colinear or duplicate points


	function filterPoints(start, end) {
		if (!start) return start;
		if (!end) end = start;
		var p = start,
				again;

		do {
			again = false;

			if (!p.steiner && (equals(p, p.next) || area(p.prev, p, p.next) === 0)) {
				removeNode(p);
				p = end = p.prev;
				if (p === p.next) break;
				again = true;
			} else {
				p = p.next;
			}
		} while (again || p !== end);

		return end;
	} // main ear slicing loop which triangulates a polygon (given as a linked list)


	function earcutLinked(ear, triangles, dim, minX, minY, invSize, pass) {
		if (!ear) return; // interlink polygon nodes in z-order

		if (!pass && invSize) indexCurve(ear, minX, minY, invSize);
		var stop = ear,
				prev,
				next; // iterate through ears, slicing them one by one

		while (ear.prev !== ear.next) {
			prev = ear.prev;
			next = ear.next;

			if (invSize ? isEarHashed(ear, minX, minY, invSize) : isEar(ear)) {
				// cut off the triangle
				triangles.push(prev.i / dim);
				triangles.push(ear.i / dim);
				triangles.push(next.i / dim);
				removeNode(ear); // skipping the next vertex leads to less sliver triangles

				ear = next.next;
				stop = next.next;
				continue;
			}

			ear = next; // if we looped through the whole remaining polygon and can't find any more ears

			if (ear === stop) {
				// try filtering points and slicing again
				if (!pass) {
					earcutLinked(filterPoints(ear), triangles, dim, minX, minY, invSize, 1); // if this didn't work, try curing all small self-intersections locally
				} else if (pass === 1) {
					ear = cureLocalIntersections(filterPoints(ear), triangles, dim);
					earcutLinked(ear, triangles, dim, minX, minY, invSize, 2); // as a last resort, try splitting the remaining polygon into two
				} else if (pass === 2) {
					splitEarcut(ear, triangles, dim, minX, minY, invSize);
				}

				break;
			}
		}
	} // check whether a polygon node forms a valid ear with adjacent nodes


	function isEar(ear) {
		var a = ear.prev,
				b = ear,
				c = ear.next;
		if (area(a, b, c) >= 0) return false; // reflex, can't be an ear
		// now make sure we don't have other points inside the potential ear

		var p = ear.next.next;

		while (p !== ear.prev) {
			if (pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;
			p = p.next;
		}

		return true;
	}

	function isEarHashed(ear, minX, minY, invSize) {
		var a = ear.prev,
				b = ear,
				c = ear.next;
		if (area(a, b, c) >= 0) return false; // reflex, can't be an ear
		// triangle bbox; min & max are calculated like this for speed

		var minTX = a.x < b.x ? a.x < c.x ? a.x : c.x : b.x < c.x ? b.x : c.x,
				minTY = a.y < b.y ? a.y < c.y ? a.y : c.y : b.y < c.y ? b.y : c.y,
				maxTX = a.x > b.x ? a.x > c.x ? a.x : c.x : b.x > c.x ? b.x : c.x,
				maxTY = a.y > b.y ? a.y > c.y ? a.y : c.y : b.y > c.y ? b.y : c.y; // z-order range for the current triangle bbox;

		var minZ = zOrder(minTX, minTY, minX, minY, invSize),
				maxZ = zOrder(maxTX, maxTY, minX, minY, invSize);
		var p = ear.prevZ,
				n = ear.nextZ; // look for points inside the triangle in both directions

		while (p && p.z >= minZ && n && n.z <= maxZ) {
			if (p !== ear.prev && p !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;
			p = p.prevZ;
			if (n !== ear.prev && n !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, n.x, n.y) && area(n.prev, n, n.next) >= 0) return false;
			n = n.nextZ;
		} // look for remaining points in decreasing z-order


		while (p && p.z >= minZ) {
			if (p !== ear.prev && p !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;
			p = p.prevZ;
		} // look for remaining points in increasing z-order


		while (n && n.z <= maxZ) {
			if (n !== ear.prev && n !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, n.x, n.y) && area(n.prev, n, n.next) >= 0) return false;
			n = n.nextZ;
		}

		return true;
	} // go through all polygon nodes and cure small local self-intersections


	function cureLocalIntersections(start, triangles, dim) {
		var p = start;

		do {
			var a = p.prev,
					b = p.next.next;

			if (!equals(a, b) && intersects(a, p, p.next, b) && locallyInside(a, b) && locallyInside(b, a)) {
				triangles.push(a.i / dim);
				triangles.push(p.i / dim);
				triangles.push(b.i / dim); // remove two nodes involved

				removeNode(p);
				removeNode(p.next);
				p = start = b;
			}

			p = p.next;
		} while (p !== start);

		return filterPoints(p);
	} // try splitting polygon into two and triangulate them independently


	function splitEarcut(start, triangles, dim, minX, minY, invSize) {
		// look for a valid diagonal that divides the polygon into two
		var a = start;

		do {
			var b = a.next.next;

			while (b !== a.prev) {
				if (a.i !== b.i && isValidDiagonal(a, b)) {
					// split the polygon in two by the diagonal
					var c = splitPolygon(a, b); // filter colinear points around the cuts

					a = filterPoints(a, a.next);
					c = filterPoints(c, c.next); // run earcut on each half

					earcutLinked(a, triangles, dim, minX, minY, invSize);
					earcutLinked(c, triangles, dim, minX, minY, invSize);
					return;
				}

				b = b.next;
			}

			a = a.next;
		} while (a !== start);
	} // link every hole into the outer loop, producing a single-ring polygon without holes


	function eliminateHoles(data, holeIndices, outerNode, dim) {
		var queue = [];
		var i, len, start, end, list;

		for (i = 0, len = holeIndices.length; i < len; i++) {
			start = holeIndices[i] * dim;
			end = i < len - 1 ? holeIndices[i + 1] * dim : data.length;
			list = linkedList(data, start, end, dim, false);
			if (list === list.next) list.steiner = true;
			queue.push(getLeftmost(list));
		}

		queue.sort(compareX); // process holes from left to right

		for (i = 0; i < queue.length; i++) {
			eliminateHole(queue[i], outerNode);
			outerNode = filterPoints(outerNode, outerNode.next);
		}

		return outerNode;
	}

	function compareX(a, b) {
		return a.x - b.x;
	} // find a bridge between vertices that connects hole with an outer ring and and link it


	function eliminateHole(hole, outerNode) {
		outerNode = findHoleBridge(hole, outerNode);

		if (outerNode) {
			var b = splitPolygon(outerNode, hole); // filter collinear points around the cuts

			filterPoints(outerNode, outerNode.next);
			filterPoints(b, b.next);
		}
	} // David Eberly's algorithm for finding a bridge between hole and outer polygon


	function findHoleBridge(hole, outerNode) {
		var p = outerNode;
		var hx = hole.x;
		var hy = hole.y;
		var qx = -Infinity,
				m; // find a segment intersected by a ray from the hole's leftmost point to the left;
		// segment's endpoint with lesser x will be potential connection point

		do {
			if (hy <= p.y && hy >= p.next.y && p.next.y !== p.y) {
				var x = p.x + (hy - p.y) * (p.next.x - p.x) / (p.next.y - p.y);

				if (x <= hx && x > qx) {
					qx = x;

					if (x === hx) {
						if (hy === p.y) return p;
						if (hy === p.next.y) return p.next;
					}

					m = p.x < p.next.x ? p : p.next;
				}
			}

			p = p.next;
		} while (p !== outerNode);

		if (!m) return null;
		if (hx === qx) return m; // hole touches outer segment; pick leftmost endpoint
		// look for points inside the triangle of hole point, segment intersection and endpoint;
		// if there are no points found, we have a valid connection;
		// otherwise choose the point of the minimum angle with the ray as connection point

		var stop = m,
				mx = m.x,
				my = m.y;
		var tanMin = Infinity,
				tan;
		p = m;

		do {
			if (hx >= p.x && p.x >= mx && hx !== p.x && pointInTriangle(hy < my ? hx : qx, hy, mx, my, hy < my ? qx : hx, hy, p.x, p.y)) {
				tan = Math.abs(hy - p.y) / (hx - p.x); // tangential

				if (locallyInside(p, hole) && (tan < tanMin || tan === tanMin && (p.x > m.x || p.x === m.x && sectorContainsSector(m, p)))) {
					m = p;
					tanMin = tan;
				}
			}

			p = p.next;
		} while (p !== stop);

		return m;
	} // whether sector in vertex m contains sector in vertex p in the same coordinates


	function sectorContainsSector(m, p) {
		return area(m.prev, m, p.prev) < 0 && area(p.next, m, m.next) < 0;
	} // interlink polygon nodes in z-order


	function indexCurve(start, minX, minY, invSize) {
		var p = start;

		do {
			if (p.z === null) p.z = zOrder(p.x, p.y, minX, minY, invSize);
			p.prevZ = p.prev;
			p.nextZ = p.next;
			p = p.next;
		} while (p !== start);

		p.prevZ.nextZ = null;
		p.prevZ = null;
		sortLinked(p);
	} // Simon Tatham's linked list merge sort algorithm
	// http://www.chiark.greenend.org.uk/~sgtatham/algorithms/listsort.html


	function sortLinked(list) {
		var i,
				p,
				q,
				e,
				tail,
				numMerges,
				pSize,
				qSize,
				inSize = 1;

		do {
			p = list;
			list = null;
			tail = null;
			numMerges = 0;

			while (p) {
				numMerges++;
				q = p;
				pSize = 0;

				for (i = 0; i < inSize; i++) {
					pSize++;
					q = q.nextZ;
					if (!q) break;
				}

				qSize = inSize;

				while (pSize > 0 || qSize > 0 && q) {
					if (pSize !== 0 && (qSize === 0 || !q || p.z <= q.z)) {
						e = p;
						p = p.nextZ;
						pSize--;
					} else {
						e = q;
						q = q.nextZ;
						qSize--;
					}

					if (tail) tail.nextZ = e;else list = e;
					e.prevZ = tail;
					tail = e;
				}

				p = q;
			}

			tail.nextZ = null;
			inSize *= 2;
		} while (numMerges > 1);

		return list;
	} // z-order of a point given coords and inverse of the longer side of data bbox


	function zOrder(x, y, minX, minY, invSize) {
		// coords are transformed into non-negative 15-bit integer range
		x = 32767 * (x - minX) * invSize;
		y = 32767 * (y - minY) * invSize;
		x = (x | x << 8) & 0x00FF00FF;
		x = (x | x << 4) & 0x0F0F0F0F;
		x = (x | x << 2) & 0x33333333;
		x = (x | x << 1) & 0x55555555;
		y = (y | y << 8) & 0x00FF00FF;
		y = (y | y << 4) & 0x0F0F0F0F;
		y = (y | y << 2) & 0x33333333;
		y = (y | y << 1) & 0x55555555;
		return x | y << 1;
	} // find the leftmost node of a polygon ring


	function getLeftmost(start) {
		var p = start,
				leftmost = start;

		do {
			if (p.x < leftmost.x || p.x === leftmost.x && p.y < leftmost.y) leftmost = p;
			p = p.next;
		} while (p !== start);

		return leftmost;
	} // check if a point lies within a convex triangle


	function pointInTriangle(ax, ay, bx, by, cx, cy, px, py) {
		return (cx - px) * (ay - py) - (ax - px) * (cy - py) >= 0 && (ax - px) * (by - py) - (bx - px) * (ay - py) >= 0 && (bx - px) * (cy - py) - (cx - px) * (by - py) >= 0;
	} // check if a diagonal between two polygon nodes is valid (lies in polygon interior)


	function isValidDiagonal(a, b) {
		return a.next.i !== b.i && a.prev.i !== b.i && !intersectsPolygon(a, b) && ( // dones't intersect other edges
		locallyInside(a, b) && locallyInside(b, a) && middleInside(a, b) && ( // locally visible
		area(a.prev, a, b.prev) || area(a, b.prev, b)) || // does not create opposite-facing sectors
		equals(a, b) && area(a.prev, a, a.next) > 0 && area(b.prev, b, b.next) > 0); // special zero-length case
	} // signed area of a triangle


	function area(p, q, r) {
		return (q.y - p.y) * (r.x - q.x) - (q.x - p.x) * (r.y - q.y);
	} // check if two points are equal


	function equals(p1, p2) {
		return p1.x === p2.x && p1.y === p2.y;
	} // check if two segments intersect


	function intersects(p1, q1, p2, q2) {
		var o1 = sign(area(p1, q1, p2));
		var o2 = sign(area(p1, q1, q2));
		var o3 = sign(area(p2, q2, p1));
		var o4 = sign(area(p2, q2, q1));
		if (o1 !== o2 && o3 !== o4) return true; // general case

		if (o1 === 0 && onSegment(p1, p2, q1)) return true; // p1, q1 and p2 are collinear and p2 lies on p1q1

		if (o2 === 0 && onSegment(p1, q2, q1)) return true; // p1, q1 and q2 are collinear and q2 lies on p1q1

		if (o3 === 0 && onSegment(p2, p1, q2)) return true; // p2, q2 and p1 are collinear and p1 lies on p2q2

		if (o4 === 0 && onSegment(p2, q1, q2)) return true; // p2, q2 and q1 are collinear and q1 lies on p2q2

		return false;
	} // for collinear points p, q, r, check if point q lies on segment pr


	function onSegment(p, q, r) {
		return q.x <= Math.max(p.x, r.x) && q.x >= Math.min(p.x, r.x) && q.y <= Math.max(p.y, r.y) && q.y >= Math.min(p.y, r.y);
	}

	function sign(num) {
		return num > 0 ? 1 : num < 0 ? -1 : 0;
	} // check if a polygon diagonal intersects any polygon segments


	function intersectsPolygon(a, b) {
		var p = a;

		do {
			if (p.i !== a.i && p.next.i !== a.i && p.i !== b.i && p.next.i !== b.i && intersects(p, p.next, a, b)) return true;
			p = p.next;
		} while (p !== a);

		return false;
	} // check if a polygon diagonal is locally inside the polygon


	function locallyInside(a, b) {
		return area(a.prev, a, a.next) < 0 ? area(a, b, a.next) >= 0 && area(a, a.prev, b) >= 0 : area(a, b, a.prev) < 0 || area(a, a.next, b) < 0;
	} // check if the middle point of a polygon diagonal is inside the polygon


	function middleInside(a, b) {
		var p = a,
				inside = false;
		var px = (a.x + b.x) / 2,
				py = (a.y + b.y) / 2;

		do {
			if (p.y > py !== p.next.y > py && p.next.y !== p.y && px < (p.next.x - p.x) * (py - p.y) / (p.next.y - p.y) + p.x) inside = !inside;
			p = p.next;
		} while (p !== a);

		return inside;
	} // link two polygon vertices with a bridge; if the vertices belong to the same ring, it splits polygon into two;
	// if one belongs to the outer ring and another to a hole, it merges it into a single ring


	function splitPolygon(a, b) {
		var a2 = new Node(a.i, a.x, a.y),
				b2 = new Node(b.i, b.x, b.y),
				an = a.next,
				bp = b.prev;
		a.next = b;
		b.prev = a;
		a2.next = an;
		an.prev = a2;
		b2.next = a2;
		a2.prev = b2;
		bp.next = b2;
		b2.prev = bp;
		return b2;
	} // create a node and optionally link it with previous one (in a circular doubly linked list)


	function insertNode(i, x, y, last) {
		var p = new Node(i, x, y);

		if (!last) {
			p.prev = p;
			p.next = p;
		} else {
			p.next = last.next;
			p.prev = last;
			last.next.prev = p;
			last.next = p;
		}

		return p;
	}

	function removeNode(p) {
		p.next.prev = p.prev;
		p.prev.next = p.next;
		if (p.prevZ) p.prevZ.nextZ = p.nextZ;
		if (p.nextZ) p.nextZ.prevZ = p.prevZ;
	}

	function Node(i, x, y) {
		// vertex index in coordinates array
		this.i = i; // vertex coordinates

		this.x = x;
		this.y = y; // previous and next vertex nodes in a polygon ring

		this.prev = null;
		this.next = null; // z-order curve value

		this.z = null; // previous and next nodes in z-order

		this.prevZ = null;
		this.nextZ = null; // indicates whether this is a steiner point

		this.steiner = false;
	}

	function signedArea(data, start, end, dim) {
		var sum = 0;

		for (var i = start, j = end - dim; i < end; i += dim) {
			sum += (data[j] - data[i]) * (data[i + 1] + data[j + 1]);
			j = i;
		}

		return sum;
	}

	var ShapeUtils = {
		// calculate area of the contour polygon
		area: function area(contour) {
			var n = contour.length;
			var a = 0.0;

			for (var p = n - 1, q = 0; q < n; p = q++) {
				a += contour[p].x * contour[q].y - contour[q].x * contour[p].y;
			}

			return a * 0.5;
		},
		isClockWise: function isClockWise(pts) {
			return ShapeUtils.area(pts) < 0;
		},
		triangulateShape: function triangulateShape(contour, holes) {
			var vertices = []; // flat array of vertices like [ x0,y0, x1,y1, x2,y2, ... ]

			var holeIndices = []; // array of hole indices

			var faces = []; // final array of vertex indices like [ [ a,b,d ], [ b,c,d ] ]

			removeDupEndPts(contour);
			addContour(vertices, contour); //

			var holeIndex = contour.length;
			holes.forEach(removeDupEndPts);

			for (var i = 0; i < holes.length; i++) {
				holeIndices.push(holeIndex);
				holeIndex += holes[i].length;
				addContour(vertices, holes[i]);
			} //


			var triangles = Earcut.triangulate(vertices, holeIndices); //

			for (var _i = 0; _i < triangles.length; _i += 3) {
				faces.push(triangles.slice(_i, _i + 3));
			}

			return faces;
		}
	};

	function removeDupEndPts(points) {
		var l = points.length;

		if (l > 2 && points[l - 1].equals(points[0])) {
			points.pop();
		}
	}

	function addContour(vertices, contour) {
		for (var i = 0; i < contour.length; i++) {
			vertices.push(contour[i].x);
			vertices.push(contour[i].y);
		}
	}

	var ExtrudeGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(ExtrudeGeometry, _BufferGeometry);

		function ExtrudeGeometry(shapes, options) {
			var _this;

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'ExtrudeGeometry';
			_this.parameters = {
				shapes: shapes,
				options: options
			};
			shapes = Array.isArray(shapes) ? shapes : [shapes];

			var scope = _assertThisInitialized(_this);

			var verticesArray = [];
			var uvArray = [];

			for (var i = 0, l = shapes.length; i < l; i++) {
				var shape = shapes[i];
				addShape(shape);
			} // build geometry


			_this.setAttribute('position', new Float32BufferAttribute(verticesArray, 3));

			_this.setAttribute('uv', new Float32BufferAttribute(uvArray, 2));

			_this.computeVertexNormals(); // functions


			function addShape(shape) {
				var placeholder = []; // options

				var curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;
				var steps = options.steps !== undefined ? options.steps : 1;
				var depth = options.depth !== undefined ? options.depth : 100;
				var bevelEnabled = options.bevelEnabled !== undefined ? options.bevelEnabled : true;
				var bevelThickness = options.bevelThickness !== undefined ? options.bevelThickness : 6;
				var bevelSize = options.bevelSize !== undefined ? options.bevelSize : bevelThickness - 2;
				var bevelOffset = options.bevelOffset !== undefined ? options.bevelOffset : 0;
				var bevelSegments = options.bevelSegments !== undefined ? options.bevelSegments : 3;
				var extrudePath = options.extrudePath;
				var uvgen = options.UVGenerator !== undefined ? options.UVGenerator : WorldUVGenerator; // deprecated options

				if (options.amount !== undefined) {
					console.warn('THREE.ExtrudeBufferGeometry: amount has been renamed to depth.');
					depth = options.amount;
				} //


				var extrudePts,
						extrudeByPath = false;
				var splineTube, binormal, normal, position2;

				if (extrudePath) {
					extrudePts = extrudePath.getSpacedPoints(steps);
					extrudeByPath = true;
					bevelEnabled = false; // bevels not supported for path extrusion
					// SETUP TNB variables
					// TODO1 - have a .isClosed in spline?

					splineTube = extrudePath.computeFrenetFrames(steps, false); // console.log(splineTube, 'splineTube', splineTube.normals.length, 'steps', steps, 'extrudePts', extrudePts.length);

					binormal = new Vector3();
					normal = new Vector3();
					position2 = new Vector3();
				} // Safeguards if bevels are not enabled


				if (!bevelEnabled) {
					bevelSegments = 0;
					bevelThickness = 0;
					bevelSize = 0;
					bevelOffset = 0;
				} // Variables initialization


				var shapePoints = shape.extractPoints(curveSegments);
				var vertices = shapePoints.shape;
				var holes = shapePoints.holes;
				var reverse = !ShapeUtils.isClockWise(vertices);

				if (reverse) {
					vertices = vertices.reverse(); // Maybe we should also check if holes are in the opposite direction, just to be safe ...

					for (var h = 0, hl = holes.length; h < hl; h++) {
						var ahole = holes[h];

						if (ShapeUtils.isClockWise(ahole)) {
							holes[h] = ahole.reverse();
						}
					}
				}

				var faces = ShapeUtils.triangulateShape(vertices, holes);
				/* Vertices */

				var contour = vertices; // vertices has all points but contour has only points of circumference

				for (var _h = 0, _hl = holes.length; _h < _hl; _h++) {
					var _ahole = holes[_h];
					vertices = vertices.concat(_ahole);
				}

				function scalePt2(pt, vec, size) {
					if (!vec) console.error('THREE.ExtrudeGeometry: vec does not exist');
					return vec.clone().multiplyScalar(size).add(pt);
				}

				var vlen = vertices.length,
						flen = faces.length; // Find directions for point movement

				function getBevelVec(inPt, inPrev, inNext) {
					// computes for inPt the corresponding point inPt' on a new contour
					//	 shifted by 1 unit (length of normalized vector) to the left
					// if we walk along contour clockwise, this new contour is outside the old one
					//
					// inPt' is the intersection of the two lines parallel to the two
					//	adjacent edges of inPt at a distance of 1 unit on the left side.
					var v_trans_x, v_trans_y, shrink_by; // resulting translation vector for inPt
					// good reading for geometry algorithms (here: line-line intersection)
					// http://geomalgorithms.com/a05-_intersect-1.html

					var v_prev_x = inPt.x - inPrev.x,
							v_prev_y = inPt.y - inPrev.y;
					var v_next_x = inNext.x - inPt.x,
							v_next_y = inNext.y - inPt.y;
					var v_prev_lensq = v_prev_x * v_prev_x + v_prev_y * v_prev_y; // check for collinear edges

					var collinear0 = v_prev_x * v_next_y - v_prev_y * v_next_x;

					if (Math.abs(collinear0) > Number.EPSILON) {
						// not collinear
						// length of vectors for normalizing
						var v_prev_len = Math.sqrt(v_prev_lensq);
						var v_next_len = Math.sqrt(v_next_x * v_next_x + v_next_y * v_next_y); // shift adjacent points by unit vectors to the left

						var ptPrevShift_x = inPrev.x - v_prev_y / v_prev_len;
						var ptPrevShift_y = inPrev.y + v_prev_x / v_prev_len;
						var ptNextShift_x = inNext.x - v_next_y / v_next_len;
						var ptNextShift_y = inNext.y + v_next_x / v_next_len; // scaling factor for v_prev to intersection point

						var sf = ((ptNextShift_x - ptPrevShift_x) * v_next_y - (ptNextShift_y - ptPrevShift_y) * v_next_x) / (v_prev_x * v_next_y - v_prev_y * v_next_x); // vector from inPt to intersection point

						v_trans_x = ptPrevShift_x + v_prev_x * sf - inPt.x;
						v_trans_y = ptPrevShift_y + v_prev_y * sf - inPt.y; // Don't normalize!, otherwise sharp corners become ugly
						//	but prevent crazy spikes

						var v_trans_lensq = v_trans_x * v_trans_x + v_trans_y * v_trans_y;

						if (v_trans_lensq <= 2) {
							return new Vector2(v_trans_x, v_trans_y);
						} else {
							shrink_by = Math.sqrt(v_trans_lensq / 2);
						}
					} else {
						// handle special case of collinear edges
						var direction_eq = false; // assumes: opposite

						if (v_prev_x > Number.EPSILON) {
							if (v_next_x > Number.EPSILON) {
								direction_eq = true;
							}
						} else {
							if (v_prev_x < -Number.EPSILON) {
								if (v_next_x < -Number.EPSILON) {
									direction_eq = true;
								}
							} else {
								if (Math.sign(v_prev_y) === Math.sign(v_next_y)) {
									direction_eq = true;
								}
							}
						}

						if (direction_eq) {
							// console.log("Warning: lines are a straight sequence");
							v_trans_x = -v_prev_y;
							v_trans_y = v_prev_x;
							shrink_by = Math.sqrt(v_prev_lensq);
						} else {
							// console.log("Warning: lines are a straight spike");
							v_trans_x = v_prev_x;
							v_trans_y = v_prev_y;
							shrink_by = Math.sqrt(v_prev_lensq / 2);
						}
					}

					return new Vector2(v_trans_x / shrink_by, v_trans_y / shrink_by);
				}

				var contourMovements = [];

				for (var _i = 0, il = contour.length, j = il - 1, k = _i + 1; _i < il; _i++, j++, k++) {
					if (j === il) j = 0;
					if (k === il) k = 0; //	(j)---(i)---(k)
					// console.log('i,j,k', i, j , k)

					contourMovements[_i] = getBevelVec(contour[_i], contour[j], contour[k]);
				}

				var holesMovements = [];
				var oneHoleMovements,
						verticesMovements = contourMovements.concat();

				for (var _h2 = 0, _hl2 = holes.length; _h2 < _hl2; _h2++) {
					var _ahole2 = holes[_h2];
					oneHoleMovements = [];

					for (var _i2 = 0, _il = _ahole2.length, _j = _il - 1, _k = _i2 + 1; _i2 < _il; _i2++, _j++, _k++) {
						if (_j === _il) _j = 0;
						if (_k === _il) _k = 0; //	(j)---(i)---(k)

						oneHoleMovements[_i2] = getBevelVec(_ahole2[_i2], _ahole2[_j], _ahole2[_k]);
					}

					holesMovements.push(oneHoleMovements);
					verticesMovements = verticesMovements.concat(oneHoleMovements);
				} // Loop bevelSegments, 1 for the front, 1 for the back


				for (var b = 0; b < bevelSegments; b++) {
					//for ( b = bevelSegments; b > 0; b -- ) {
					var t = b / bevelSegments;
					var z = bevelThickness * Math.cos(t * Math.PI / 2);

					var _bs = bevelSize * Math.sin(t * Math.PI / 2) + bevelOffset; // contract shape


					for (var _i3 = 0, _il2 = contour.length; _i3 < _il2; _i3++) {
						var vert = scalePt2(contour[_i3], contourMovements[_i3], _bs);
						v(vert.x, vert.y, -z);
					} // expand holes


					for (var _h3 = 0, _hl3 = holes.length; _h3 < _hl3; _h3++) {
						var _ahole3 = holes[_h3];
						oneHoleMovements = holesMovements[_h3];

						for (var _i4 = 0, _il3 = _ahole3.length; _i4 < _il3; _i4++) {
							var _vert = scalePt2(_ahole3[_i4], oneHoleMovements[_i4], _bs);

							v(_vert.x, _vert.y, -z);
						}
					}
				}

				var bs = bevelSize + bevelOffset; // Back facing vertices

				for (var _i5 = 0; _i5 < vlen; _i5++) {
					var _vert2 = bevelEnabled ? scalePt2(vertices[_i5], verticesMovements[_i5], bs) : vertices[_i5];

					if (!extrudeByPath) {
						v(_vert2.x, _vert2.y, 0);
					} else {
						// v( vert.x, vert.y + extrudePts[ 0 ].y, extrudePts[ 0 ].x );
						normal.copy(splineTube.normals[0]).multiplyScalar(_vert2.x);
						binormal.copy(splineTube.binormals[0]).multiplyScalar(_vert2.y);
						position2.copy(extrudePts[0]).add(normal).add(binormal);
						v(position2.x, position2.y, position2.z);
					}
				} // Add stepped vertices...
				// Including front facing vertices


				for (var s = 1; s <= steps; s++) {
					for (var _i6 = 0; _i6 < vlen; _i6++) {
						var _vert3 = bevelEnabled ? scalePt2(vertices[_i6], verticesMovements[_i6], bs) : vertices[_i6];

						if (!extrudeByPath) {
							v(_vert3.x, _vert3.y, depth / steps * s);
						} else {
							// v( vert.x, vert.y + extrudePts[ s - 1 ].y, extrudePts[ s - 1 ].x );
							normal.copy(splineTube.normals[s]).multiplyScalar(_vert3.x);
							binormal.copy(splineTube.binormals[s]).multiplyScalar(_vert3.y);
							position2.copy(extrudePts[s]).add(normal).add(binormal);
							v(position2.x, position2.y, position2.z);
						}
					}
				} // Add bevel segments planes
				//for ( b = 1; b <= bevelSegments; b ++ ) {


				for (var _b = bevelSegments - 1; _b >= 0; _b--) {
					var _t = _b / bevelSegments;

					var _z = bevelThickness * Math.cos(_t * Math.PI / 2);

					var _bs2 = bevelSize * Math.sin(_t * Math.PI / 2) + bevelOffset; // contract shape


					for (var _i7 = 0, _il4 = contour.length; _i7 < _il4; _i7++) {
						var _vert4 = scalePt2(contour[_i7], contourMovements[_i7], _bs2);

						v(_vert4.x, _vert4.y, depth + _z);
					} // expand holes


					for (var _h4 = 0, _hl4 = holes.length; _h4 < _hl4; _h4++) {
						var _ahole4 = holes[_h4];
						oneHoleMovements = holesMovements[_h4];

						for (var _i8 = 0, _il5 = _ahole4.length; _i8 < _il5; _i8++) {
							var _vert5 = scalePt2(_ahole4[_i8], oneHoleMovements[_i8], _bs2);

							if (!extrudeByPath) {
								v(_vert5.x, _vert5.y, depth + _z);
							} else {
								v(_vert5.x, _vert5.y + extrudePts[steps - 1].y, extrudePts[steps - 1].x + _z);
							}
						}
					}
				}
				/* Faces */
				// Top and bottom faces


				buildLidFaces(); // Sides faces

				buildSideFaces(); /////	Internal functions

				function buildLidFaces() {
					var start = verticesArray.length / 3;

					if (bevelEnabled) {
						var layer = 0; // steps + 1

						var offset = vlen * layer; // Bottom faces

						for (var _i9 = 0; _i9 < flen; _i9++) {
							var face = faces[_i9];
							f3(face[2] + offset, face[1] + offset, face[0] + offset);
						}

						layer = steps + bevelSegments * 2;
						offset = vlen * layer; // Top faces

						for (var _i10 = 0; _i10 < flen; _i10++) {
							var _face = faces[_i10];
							f3(_face[0] + offset, _face[1] + offset, _face[2] + offset);
						}
					} else {
						// Bottom faces
						for (var _i11 = 0; _i11 < flen; _i11++) {
							var _face2 = faces[_i11];
							f3(_face2[2], _face2[1], _face2[0]);
						} // Top faces


						for (var _i12 = 0; _i12 < flen; _i12++) {
							var _face3 = faces[_i12];
							f3(_face3[0] + vlen * steps, _face3[1] + vlen * steps, _face3[2] + vlen * steps);
						}
					}

					scope.addGroup(start, verticesArray.length / 3 - start, 0);
				} // Create faces for the z-sides of the shape


				function buildSideFaces() {
					var start = verticesArray.length / 3;
					var layeroffset = 0;
					sidewalls(contour, layeroffset);
					layeroffset += contour.length;

					for (var _h5 = 0, _hl5 = holes.length; _h5 < _hl5; _h5++) {
						var _ahole5 = holes[_h5];
						sidewalls(_ahole5, layeroffset); //, true

						layeroffset += _ahole5.length;
					}

					scope.addGroup(start, verticesArray.length / 3 - start, 1);
				}

				function sidewalls(contour, layeroffset) {
					var i = contour.length;

					while (--i >= 0) {
						var _j2 = i;

						var _k2 = i - 1;

						if (_k2 < 0) _k2 = contour.length - 1; //console.log('b', i,j, i-1, k,vertices.length);

						for (var _s = 0, sl = steps + bevelSegments * 2; _s < sl; _s++) {
							var slen1 = vlen * _s;
							var slen2 = vlen * (_s + 1);

							var a = layeroffset + _j2 + slen1,
									_b2 = layeroffset + _k2 + slen1,
									c = layeroffset + _k2 + slen2,
									d = layeroffset + _j2 + slen2;

							f4(a, _b2, c, d);
						}
					}
				}

				function v(x, y, z) {
					placeholder.push(x);
					placeholder.push(y);
					placeholder.push(z);
				}

				function f3(a, b, c) {
					addVertex(a);
					addVertex(b);
					addVertex(c);
					var nextIndex = verticesArray.length / 3;
					var uvs = uvgen.generateTopUV(scope, verticesArray, nextIndex - 3, nextIndex - 2, nextIndex - 1);
					addUV(uvs[0]);
					addUV(uvs[1]);
					addUV(uvs[2]);
				}

				function f4(a, b, c, d) {
					addVertex(a);
					addVertex(b);
					addVertex(d);
					addVertex(b);
					addVertex(c);
					addVertex(d);
					var nextIndex = verticesArray.length / 3;
					var uvs = uvgen.generateSideWallUV(scope, verticesArray, nextIndex - 6, nextIndex - 3, nextIndex - 2, nextIndex - 1);
					addUV(uvs[0]);
					addUV(uvs[1]);
					addUV(uvs[3]);
					addUV(uvs[1]);
					addUV(uvs[2]);
					addUV(uvs[3]);
				}

				function addVertex(index) {
					verticesArray.push(placeholder[index * 3 + 0]);
					verticesArray.push(placeholder[index * 3 + 1]);
					verticesArray.push(placeholder[index * 3 + 2]);
				}

				function addUV(vector2) {
					uvArray.push(vector2.x);
					uvArray.push(vector2.y);
				}
			}

			return _this;
		}

		var _proto = ExtrudeGeometry.prototype;

		_proto.toJSON = function toJSON() {
			var data = BufferGeometry.prototype.toJSON.call(this);
			var shapes = this.parameters.shapes;
			var options = this.parameters.options;
			return _toJSON(shapes, options, data);
		};

		return ExtrudeGeometry;
	}(BufferGeometry);

	var WorldUVGenerator = {
		generateTopUV: function generateTopUV(geometry, vertices, indexA, indexB, indexC) {
			var a_x = vertices[indexA * 3];
			var a_y = vertices[indexA * 3 + 1];
			var b_x = vertices[indexB * 3];
			var b_y = vertices[indexB * 3 + 1];
			var c_x = vertices[indexC * 3];
			var c_y = vertices[indexC * 3 + 1];
			return [new Vector2(a_x, a_y), new Vector2(b_x, b_y), new Vector2(c_x, c_y)];
		},
		generateSideWallUV: function generateSideWallUV(geometry, vertices, indexA, indexB, indexC, indexD) {
			var a_x = vertices[indexA * 3];
			var a_y = vertices[indexA * 3 + 1];
			var a_z = vertices[indexA * 3 + 2];
			var b_x = vertices[indexB * 3];
			var b_y = vertices[indexB * 3 + 1];
			var b_z = vertices[indexB * 3 + 2];
			var c_x = vertices[indexC * 3];
			var c_y = vertices[indexC * 3 + 1];
			var c_z = vertices[indexC * 3 + 2];
			var d_x = vertices[indexD * 3];
			var d_y = vertices[indexD * 3 + 1];
			var d_z = vertices[indexD * 3 + 2];

			if (Math.abs(a_y - b_y) < 0.01) {
				return [new Vector2(a_x, 1 - a_z), new Vector2(b_x, 1 - b_z), new Vector2(c_x, 1 - c_z), new Vector2(d_x, 1 - d_z)];
			} else {
				return [new Vector2(a_y, 1 - a_z), new Vector2(b_y, 1 - b_z), new Vector2(c_y, 1 - c_z), new Vector2(d_y, 1 - d_z)];
			}
		}
	};

	function _toJSON(shapes, options, data) {
		data.shapes = [];

		if (Array.isArray(shapes)) {
			for (var i = 0, l = shapes.length; i < l; i++) {
				var shape = shapes[i];
				data.shapes.push(shape.uuid);
			}
		} else {
			data.shapes.push(shapes.uuid);
		}

		if (options.extrudePath !== undefined) data.options.extrudePath = options.extrudePath.toJSON();
		return data;
	}

	var IcosahedronGeometry = /*#__PURE__*/function (_PolyhedronGeometry) {
		_inheritsLoose(IcosahedronGeometry, _PolyhedronGeometry);

		function IcosahedronGeometry(radius, detail) {
			var _this;

			if (radius === void 0) {
				radius = 1;
			}

			if (detail === void 0) {
				detail = 0;
			}

			var t = (1 + Math.sqrt(5)) / 2;
			var vertices = [-1, t, 0, 1, t, 0, -1, -t, 0, 1, -t, 0, 0, -1, t, 0, 1, t, 0, -1, -t, 0, 1, -t, t, 0, -1, t, 0, 1, -t, 0, -1, -t, 0, 1];
			var indices = [0, 11, 5, 0, 5, 1, 0, 1, 7, 0, 7, 10, 0, 10, 11, 1, 5, 9, 5, 11, 4, 11, 10, 2, 10, 7, 6, 7, 1, 8, 3, 9, 4, 3, 4, 2, 3, 2, 6, 3, 6, 8, 3, 8, 9, 4, 9, 5, 2, 4, 11, 6, 2, 10, 8, 6, 7, 9, 8, 1];
			_this = _PolyhedronGeometry.call(this, vertices, indices, radius, detail) || this;
			_this.type = 'IcosahedronGeometry';
			_this.parameters = {
				radius: radius,
				detail: detail
			};
			return _this;
		}

		return IcosahedronGeometry;
	}(PolyhedronGeometry);

	var LatheGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(LatheGeometry, _BufferGeometry);

		function LatheGeometry(points, segments, phiStart, phiLength) {
			var _this;

			if (segments === void 0) {
				segments = 12;
			}

			if (phiStart === void 0) {
				phiStart = 0;
			}

			if (phiLength === void 0) {
				phiLength = Math.PI * 2;
			}

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'LatheGeometry';
			_this.parameters = {
				points: points,
				segments: segments,
				phiStart: phiStart,
				phiLength: phiLength
			};
			segments = Math.floor(segments); // clamp phiLength so it's in range of [ 0, 2PI ]

			phiLength = MathUtils.clamp(phiLength, 0, Math.PI * 2); // buffers

			var indices = [];
			var vertices = [];
			var uvs = []; // helper variables

			var inverseSegments = 1.0 / segments;
			var vertex = new Vector3();
			var uv = new Vector2(); // generate vertices and uvs

			for (var i = 0; i <= segments; i++) {
				var phi = phiStart + i * inverseSegments * phiLength;
				var sin = Math.sin(phi);
				var cos = Math.cos(phi);

				for (var j = 0; j <= points.length - 1; j++) {
					// vertex
					vertex.x = points[j].x * sin;
					vertex.y = points[j].y;
					vertex.z = points[j].x * cos;
					vertices.push(vertex.x, vertex.y, vertex.z); // uv

					uv.x = i / segments;
					uv.y = j / (points.length - 1);
					uvs.push(uv.x, uv.y);
				}
			} // indices


			for (var _i = 0; _i < segments; _i++) {
				for (var _j = 0; _j < points.length - 1; _j++) {
					var base = _j + _i * points.length;
					var a = base;
					var b = base + points.length;
					var c = base + points.length + 1;
					var d = base + 1; // faces

					indices.push(a, b, d);
					indices.push(b, c, d);
				}
			} // build geometry


			_this.setIndex(indices);

			_this.setAttribute('position', new Float32BufferAttribute(vertices, 3));

			_this.setAttribute('uv', new Float32BufferAttribute(uvs, 2)); // generate normals


			_this.computeVertexNormals(); // if the geometry is closed, we need to average the normals along the seam.
			// because the corresponding vertices are identical (but still have different UVs).


			if (phiLength === Math.PI * 2) {
				var normals = _this.attributes.normal.array;
				var n1 = new Vector3();
				var n2 = new Vector3();
				var n = new Vector3(); // this is the buffer offset for the last line of vertices

				var _base = segments * points.length * 3;

				for (var _i2 = 0, _j2 = 0; _i2 < points.length; _i2++, _j2 += 3) {
					// select the normal of the vertex in the first line
					n1.x = normals[_j2 + 0];
					n1.y = normals[_j2 + 1];
					n1.z = normals[_j2 + 2]; // select the normal of the vertex in the last line

					n2.x = normals[_base + _j2 + 0];
					n2.y = normals[_base + _j2 + 1];
					n2.z = normals[_base + _j2 + 2]; // average normals

					n.addVectors(n1, n2).normalize(); // assign the new values to both normals

					normals[_j2 + 0] = normals[_base + _j2 + 0] = n.x;
					normals[_j2 + 1] = normals[_base + _j2 + 1] = n.y;
					normals[_j2 + 2] = normals[_base + _j2 + 2] = n.z;
				}
			}

			return _this;
		}

		return LatheGeometry;
	}(BufferGeometry);

	var OctahedronGeometry = /*#__PURE__*/function (_PolyhedronGeometry) {
		_inheritsLoose(OctahedronGeometry, _PolyhedronGeometry);

		function OctahedronGeometry(radius, detail) {
			var _this;

			if (radius === void 0) {
				radius = 1;
			}

			if (detail === void 0) {
				detail = 0;
			}

			var vertices = [1, 0, 0, -1, 0, 0, 0, 1, 0, 0, -1, 0, 0, 0, 1, 0, 0, -1];
			var indices = [0, 2, 4, 0, 4, 3, 0, 3, 5, 0, 5, 2, 1, 2, 5, 1, 5, 3, 1, 3, 4, 1, 4, 2];
			_this = _PolyhedronGeometry.call(this, vertices, indices, radius, detail) || this;
			_this.type = 'OctahedronGeometry';
			_this.parameters = {
				radius: radius,
				detail: detail
			};
			return _this;
		}

		return OctahedronGeometry;
	}(PolyhedronGeometry);

	/**
	 * Parametric Surfaces Geometry
	 * based on the brilliant article by @prideout https://prideout.net/blog/old/blog/index.html@p=44.html
	 */

	function ParametricGeometry(func, slices, stacks) {
		BufferGeometry.call(this);
		this.type = 'ParametricGeometry';
		this.parameters = {
			func: func,
			slices: slices,
			stacks: stacks
		}; // buffers

		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];
		var EPS = 0.00001;
		var normal = new Vector3();
		var p0 = new Vector3(),
				p1 = new Vector3();
		var pu = new Vector3(),
				pv = new Vector3();

		if (func.length < 3) {
			console.error('THREE.ParametricGeometry: Function must now modify a Vector3 as third parameter.');
		} // generate vertices, normals and uvs


		var sliceCount = slices + 1;

		for (var i = 0; i <= stacks; i++) {
			var v = i / stacks;

			for (var j = 0; j <= slices; j++) {
				var u = j / slices; // vertex

				func(u, v, p0);
				vertices.push(p0.x, p0.y, p0.z); // normal
				// approximate tangent vectors via finite differences

				if (u - EPS >= 0) {
					func(u - EPS, v, p1);
					pu.subVectors(p0, p1);
				} else {
					func(u + EPS, v, p1);
					pu.subVectors(p1, p0);
				}

				if (v - EPS >= 0) {
					func(u, v - EPS, p1);
					pv.subVectors(p0, p1);
				} else {
					func(u, v + EPS, p1);
					pv.subVectors(p1, p0);
				} // cross product of tangent vectors returns surface normal


				normal.crossVectors(pu, pv).normalize();
				normals.push(normal.x, normal.y, normal.z); // uv

				uvs.push(u, v);
			}
		} // generate indices


		for (var _i = 0; _i < stacks; _i++) {
			for (var _j = 0; _j < slices; _j++) {
				var a = _i * sliceCount + _j;
				var b = _i * sliceCount + _j + 1;
				var c = (_i + 1) * sliceCount + _j + 1;
				var d = (_i + 1) * sliceCount + _j; // faces one and two

				indices.push(a, b, d);
				indices.push(b, c, d);
			}
		} // build geometry


		this.setIndex(indices);
		this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
		this.setAttribute('normal', new Float32BufferAttribute(normals, 3));
		this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));
	}

	ParametricGeometry.prototype = Object.create(BufferGeometry.prototype);
	ParametricGeometry.prototype.constructor = ParametricGeometry;

	var RingGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(RingGeometry, _BufferGeometry);

		function RingGeometry(innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength) {
			var _this;

			if (innerRadius === void 0) {
				innerRadius = 0.5;
			}

			if (outerRadius === void 0) {
				outerRadius = 1;
			}

			if (thetaSegments === void 0) {
				thetaSegments = 8;
			}

			if (phiSegments === void 0) {
				phiSegments = 1;
			}

			if (thetaStart === void 0) {
				thetaStart = 0;
			}

			if (thetaLength === void 0) {
				thetaLength = Math.PI * 2;
			}

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'RingGeometry';
			_this.parameters = {
				innerRadius: innerRadius,
				outerRadius: outerRadius,
				thetaSegments: thetaSegments,
				phiSegments: phiSegments,
				thetaStart: thetaStart,
				thetaLength: thetaLength
			};
			thetaSegments = Math.max(3, thetaSegments);
			phiSegments = Math.max(1, phiSegments); // buffers

			var indices = [];
			var vertices = [];
			var normals = [];
			var uvs = []; // some helper variables

			var radius = innerRadius;
			var radiusStep = (outerRadius - innerRadius) / phiSegments;
			var vertex = new Vector3();
			var uv = new Vector2(); // generate vertices, normals and uvs

			for (var j = 0; j <= phiSegments; j++) {
				for (var i = 0; i <= thetaSegments; i++) {
					// values are generate from the inside of the ring to the outside
					var segment = thetaStart + i / thetaSegments * thetaLength; // vertex

					vertex.x = radius * Math.cos(segment);
					vertex.y = radius * Math.sin(segment);
					vertices.push(vertex.x, vertex.y, vertex.z); // normal

					normals.push(0, 0, 1); // uv

					uv.x = (vertex.x / outerRadius + 1) / 2;
					uv.y = (vertex.y / outerRadius + 1) / 2;
					uvs.push(uv.x, uv.y);
				} // increase the radius for next row of vertices


				radius += radiusStep;
			} // indices


			for (var _j = 0; _j < phiSegments; _j++) {
				var thetaSegmentLevel = _j * (thetaSegments + 1);

				for (var _i = 0; _i < thetaSegments; _i++) {
					var _segment = _i + thetaSegmentLevel;

					var a = _segment;
					var b = _segment + thetaSegments + 1;
					var c = _segment + thetaSegments + 2;
					var d = _segment + 1; // faces

					indices.push(a, b, d);
					indices.push(b, c, d);
				}
			} // build geometry


			_this.setIndex(indices);

			_this.setAttribute('position', new Float32BufferAttribute(vertices, 3));

			_this.setAttribute('normal', new Float32BufferAttribute(normals, 3));

			_this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));

			return _this;
		}

		return RingGeometry;
	}(BufferGeometry);

	var ShapeGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(ShapeGeometry, _BufferGeometry);

		function ShapeGeometry(shapes, curveSegments) {
			var _this;

			if (curveSegments === void 0) {
				curveSegments = 12;
			}

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'ShapeGeometry';
			_this.parameters = {
				shapes: shapes,
				curveSegments: curveSegments
			}; // buffers

			var indices = [];
			var vertices = [];
			var normals = [];
			var uvs = []; // helper variables

			var groupStart = 0;
			var groupCount = 0; // allow single and array values for "shapes" parameter

			if (Array.isArray(shapes) === false) {
				addShape(shapes);
			} else {
				for (var i = 0; i < shapes.length; i++) {
					addShape(shapes[i]);

					_this.addGroup(groupStart, groupCount, i); // enables MultiMaterial support


					groupStart += groupCount;
					groupCount = 0;
				}
			} // build geometry


			_this.setIndex(indices);

			_this.setAttribute('position', new Float32BufferAttribute(vertices, 3));

			_this.setAttribute('normal', new Float32BufferAttribute(normals, 3));

			_this.setAttribute('uv', new Float32BufferAttribute(uvs, 2)); // helper functions


			function addShape(shape) {
				var indexOffset = vertices.length / 3;
				var points = shape.extractPoints(curveSegments);
				var shapeVertices = points.shape;
				var shapeHoles = points.holes; // check direction of vertices

				if (ShapeUtils.isClockWise(shapeVertices) === false) {
					shapeVertices = shapeVertices.reverse();
				}

				for (var _i = 0, l = shapeHoles.length; _i < l; _i++) {
					var shapeHole = shapeHoles[_i];

					if (ShapeUtils.isClockWise(shapeHole) === true) {
						shapeHoles[_i] = shapeHole.reverse();
					}
				}

				var faces = ShapeUtils.triangulateShape(shapeVertices, shapeHoles); // join vertices of inner and outer paths to a single array

				for (var _i2 = 0, _l = shapeHoles.length; _i2 < _l; _i2++) {
					var _shapeHole = shapeHoles[_i2];
					shapeVertices = shapeVertices.concat(_shapeHole);
				} // vertices, normals, uvs


				for (var _i3 = 0, _l2 = shapeVertices.length; _i3 < _l2; _i3++) {
					var vertex = shapeVertices[_i3];
					vertices.push(vertex.x, vertex.y, 0);
					normals.push(0, 0, 1);
					uvs.push(vertex.x, vertex.y); // world uvs
				} // incides


				for (var _i4 = 0, _l3 = faces.length; _i4 < _l3; _i4++) {
					var face = faces[_i4];
					var a = face[0] + indexOffset;
					var b = face[1] + indexOffset;
					var c = face[2] + indexOffset;
					indices.push(a, b, c);
					groupCount += 3;
				}
			}

			return _this;
		}

		var _proto = ShapeGeometry.prototype;

		_proto.toJSON = function toJSON() {
			var data = BufferGeometry.prototype.toJSON.call(this);
			var shapes = this.parameters.shapes;
			return _toJSON$1(shapes, data);
		};

		return ShapeGeometry;
	}(BufferGeometry);

	function _toJSON$1(shapes, data) {
		data.shapes = [];

		if (Array.isArray(shapes)) {
			for (var i = 0, l = shapes.length; i < l; i++) {
				var shape = shapes[i];
				data.shapes.push(shape.uuid);
			}
		} else {
			data.shapes.push(shapes.uuid);
		}

		return data;
	}

	var SphereGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(SphereGeometry, _BufferGeometry);

		function SphereGeometry(radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength) {
			var _this;

			if (radius === void 0) {
				radius = 1;
			}

			if (widthSegments === void 0) {
				widthSegments = 8;
			}

			if (heightSegments === void 0) {
				heightSegments = 6;
			}

			if (phiStart === void 0) {
				phiStart = 0;
			}

			if (phiLength === void 0) {
				phiLength = Math.PI * 2;
			}

			if (thetaStart === void 0) {
				thetaStart = 0;
			}

			if (thetaLength === void 0) {
				thetaLength = Math.PI;
			}

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'SphereGeometry';
			_this.parameters = {
				radius: radius,
				widthSegments: widthSegments,
				heightSegments: heightSegments,
				phiStart: phiStart,
				phiLength: phiLength,
				thetaStart: thetaStart,
				thetaLength: thetaLength
			};
			widthSegments = Math.max(3, Math.floor(widthSegments));
			heightSegments = Math.max(2, Math.floor(heightSegments));
			var thetaEnd = Math.min(thetaStart + thetaLength, Math.PI);
			var index = 0;
			var grid = [];
			var vertex = new Vector3();
			var normal = new Vector3(); // buffers

			var indices = [];
			var vertices = [];
			var normals = [];
			var uvs = []; // generate vertices, normals and uvs

			for (var iy = 0; iy <= heightSegments; iy++) {
				var verticesRow = [];
				var v = iy / heightSegments; // special case for the poles

				var uOffset = 0;

				if (iy == 0 && thetaStart == 0) {
					uOffset = 0.5 / widthSegments;
				} else if (iy == heightSegments && thetaEnd == Math.PI) {
					uOffset = -0.5 / widthSegments;
				}

				for (var ix = 0; ix <= widthSegments; ix++) {
					var u = ix / widthSegments; // vertex

					vertex.x = -radius * Math.cos(phiStart + u * phiLength) * Math.sin(thetaStart + v * thetaLength);
					vertex.y = radius * Math.cos(thetaStart + v * thetaLength);
					vertex.z = radius * Math.sin(phiStart + u * phiLength) * Math.sin(thetaStart + v * thetaLength);
					vertices.push(vertex.x, vertex.y, vertex.z); // normal

					normal.copy(vertex).normalize();
					normals.push(normal.x, normal.y, normal.z); // uv

					uvs.push(u + uOffset, 1 - v);
					verticesRow.push(index++);
				}

				grid.push(verticesRow);
			} // indices


			for (var _iy = 0; _iy < heightSegments; _iy++) {
				for (var _ix = 0; _ix < widthSegments; _ix++) {
					var a = grid[_iy][_ix + 1];
					var b = grid[_iy][_ix];
					var c = grid[_iy + 1][_ix];
					var d = grid[_iy + 1][_ix + 1];
					if (_iy !== 0 || thetaStart > 0) indices.push(a, b, d);
					if (_iy !== heightSegments - 1 || thetaEnd < Math.PI) indices.push(b, c, d);
				}
			} // build geometry


			_this.setIndex(indices);

			_this.setAttribute('position', new Float32BufferAttribute(vertices, 3));

			_this.setAttribute('normal', new Float32BufferAttribute(normals, 3));

			_this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));

			return _this;
		}

		return SphereGeometry;
	}(BufferGeometry);

	var TetrahedronGeometry = /*#__PURE__*/function (_PolyhedronGeometry) {
		_inheritsLoose(TetrahedronGeometry, _PolyhedronGeometry);

		function TetrahedronGeometry(radius, detail) {
			var _this;

			if (radius === void 0) {
				radius = 1;
			}

			if (detail === void 0) {
				detail = 0;
			}

			var vertices = [1, 1, 1, -1, -1, 1, -1, 1, -1, 1, -1, -1];
			var indices = [2, 1, 0, 0, 3, 2, 1, 3, 0, 2, 3, 1];
			_this = _PolyhedronGeometry.call(this, vertices, indices, radius, detail) || this;
			_this.type = 'TetrahedronGeometry';
			_this.parameters = {
				radius: radius,
				detail: detail
			};
			return _this;
		}

		return TetrahedronGeometry;
	}(PolyhedronGeometry);

	var TextGeometry = /*#__PURE__*/function (_ExtrudeGeometry) {
		_inheritsLoose(TextGeometry, _ExtrudeGeometry);

		function TextGeometry(text, parameters) {
			var _this;

			if (parameters === void 0) {
				parameters = {};
			}

			var font = parameters.font;

			if (!(font && font.isFont)) {
				console.error('THREE.TextGeometry: font parameter is not an instance of THREE.Font.');
				return new BufferGeometry() || _assertThisInitialized(_this);
			}

			var shapes = font.generateShapes(text, parameters.size); // translate parameters to ExtrudeGeometry API

			parameters.depth = parameters.height !== undefined ? parameters.height : 50; // defaults

			if (parameters.bevelThickness === undefined) parameters.bevelThickness = 10;
			if (parameters.bevelSize === undefined) parameters.bevelSize = 8;
			if (parameters.bevelEnabled === undefined) parameters.bevelEnabled = false;
			_this = _ExtrudeGeometry.call(this, shapes, parameters) || this;
			_this.type = 'TextGeometry';
			return _this;
		}

		return TextGeometry;
	}(ExtrudeGeometry);

	var TorusGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(TorusGeometry, _BufferGeometry);

		function TorusGeometry(radius, tube, radialSegments, tubularSegments, arc) {
			var _this;

			if (radius === void 0) {
				radius = 1;
			}

			if (tube === void 0) {
				tube = 0.4;
			}

			if (radialSegments === void 0) {
				radialSegments = 8;
			}

			if (tubularSegments === void 0) {
				tubularSegments = 6;
			}

			if (arc === void 0) {
				arc = Math.PI * 2;
			}

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'TorusGeometry';
			_this.parameters = {
				radius: radius,
				tube: tube,
				radialSegments: radialSegments,
				tubularSegments: tubularSegments,
				arc: arc
			};
			radialSegments = Math.floor(radialSegments);
			tubularSegments = Math.floor(tubularSegments); // buffers

			var indices = [];
			var vertices = [];
			var normals = [];
			var uvs = []; // helper variables

			var center = new Vector3();
			var vertex = new Vector3();
			var normal = new Vector3(); // generate vertices, normals and uvs

			for (var j = 0; j <= radialSegments; j++) {
				for (var i = 0; i <= tubularSegments; i++) {
					var u = i / tubularSegments * arc;
					var v = j / radialSegments * Math.PI * 2; // vertex

					vertex.x = (radius + tube * Math.cos(v)) * Math.cos(u);
					vertex.y = (radius + tube * Math.cos(v)) * Math.sin(u);
					vertex.z = tube * Math.sin(v);
					vertices.push(vertex.x, vertex.y, vertex.z); // normal

					center.x = radius * Math.cos(u);
					center.y = radius * Math.sin(u);
					normal.subVectors(vertex, center).normalize();
					normals.push(normal.x, normal.y, normal.z); // uv

					uvs.push(i / tubularSegments);
					uvs.push(j / radialSegments);
				}
			} // generate indices


			for (var _j = 1; _j <= radialSegments; _j++) {
				for (var _i = 1; _i <= tubularSegments; _i++) {
					// indices
					var a = (tubularSegments + 1) * _j + _i - 1;
					var b = (tubularSegments + 1) * (_j - 1) + _i - 1;
					var c = (tubularSegments + 1) * (_j - 1) + _i;
					var d = (tubularSegments + 1) * _j + _i; // faces

					indices.push(a, b, d);
					indices.push(b, c, d);
				}
			} // build geometry


			_this.setIndex(indices);

			_this.setAttribute('position', new Float32BufferAttribute(vertices, 3));

			_this.setAttribute('normal', new Float32BufferAttribute(normals, 3));

			_this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));

			return _this;
		}

		return TorusGeometry;
	}(BufferGeometry);

	var TorusKnotGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(TorusKnotGeometry, _BufferGeometry);

		function TorusKnotGeometry(radius, tube, tubularSegments, radialSegments, p, q) {
			var _this;

			if (radius === void 0) {
				radius = 1;
			}

			if (tube === void 0) {
				tube = 0.4;
			}

			if (tubularSegments === void 0) {
				tubularSegments = 64;
			}

			if (radialSegments === void 0) {
				radialSegments = 8;
			}

			if (p === void 0) {
				p = 2;
			}

			if (q === void 0) {
				q = 3;
			}

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'TorusKnotGeometry';
			_this.parameters = {
				radius: radius,
				tube: tube,
				tubularSegments: tubularSegments,
				radialSegments: radialSegments,
				p: p,
				q: q
			};
			tubularSegments = Math.floor(tubularSegments);
			radialSegments = Math.floor(radialSegments); // buffers

			var indices = [];
			var vertices = [];
			var normals = [];
			var uvs = []; // helper variables

			var vertex = new Vector3();
			var normal = new Vector3();
			var P1 = new Vector3();
			var P2 = new Vector3();
			var B = new Vector3();
			var T = new Vector3();
			var N = new Vector3(); // generate vertices, normals and uvs

			for (var i = 0; i <= tubularSegments; ++i) {
				// the radian "u" is used to calculate the position on the torus curve of the current tubular segement
				var u = i / tubularSegments * p * Math.PI * 2; // now we calculate two points. P1 is our current position on the curve, P2 is a little farther ahead.
				// these points are used to create a special "coordinate space", which is necessary to calculate the correct vertex positions

				calculatePositionOnCurve(u, p, q, radius, P1);
				calculatePositionOnCurve(u + 0.01, p, q, radius, P2); // calculate orthonormal basis

				T.subVectors(P2, P1);
				N.addVectors(P2, P1);
				B.crossVectors(T, N);
				N.crossVectors(B, T); // normalize B, N. T can be ignored, we don't use it

				B.normalize();
				N.normalize();

				for (var j = 0; j <= radialSegments; ++j) {
					// now calculate the vertices. they are nothing more than an extrusion of the torus curve.
					// because we extrude a shape in the xy-plane, there is no need to calculate a z-value.
					var v = j / radialSegments * Math.PI * 2;
					var cx = -tube * Math.cos(v);
					var cy = tube * Math.sin(v); // now calculate the final vertex position.
					// first we orient the extrusion with our basis vectos, then we add it to the current position on the curve

					vertex.x = P1.x + (cx * N.x + cy * B.x);
					vertex.y = P1.y + (cx * N.y + cy * B.y);
					vertex.z = P1.z + (cx * N.z + cy * B.z);
					vertices.push(vertex.x, vertex.y, vertex.z); // normal (P1 is always the center/origin of the extrusion, thus we can use it to calculate the normal)

					normal.subVectors(vertex, P1).normalize();
					normals.push(normal.x, normal.y, normal.z); // uv

					uvs.push(i / tubularSegments);
					uvs.push(j / radialSegments);
				}
			} // generate indices


			for (var _j = 1; _j <= tubularSegments; _j++) {
				for (var _i = 1; _i <= radialSegments; _i++) {
					// indices
					var a = (radialSegments + 1) * (_j - 1) + (_i - 1);
					var b = (radialSegments + 1) * _j + (_i - 1);
					var c = (radialSegments + 1) * _j + _i;
					var d = (radialSegments + 1) * (_j - 1) + _i; // faces

					indices.push(a, b, d);
					indices.push(b, c, d);
				}
			} // build geometry


			_this.setIndex(indices);

			_this.setAttribute('position', new Float32BufferAttribute(vertices, 3));

			_this.setAttribute('normal', new Float32BufferAttribute(normals, 3));

			_this.setAttribute('uv', new Float32BufferAttribute(uvs, 2)); // this function calculates the current position on the torus curve


			function calculatePositionOnCurve(u, p, q, radius, position) {
				var cu = Math.cos(u);
				var su = Math.sin(u);
				var quOverP = q / p * u;
				var cs = Math.cos(quOverP);
				position.x = radius * (2 + cs) * 0.5 * cu;
				position.y = radius * (2 + cs) * su * 0.5;
				position.z = radius * Math.sin(quOverP) * 0.5;
			}

			return _this;
		}

		return TorusKnotGeometry;
	}(BufferGeometry);

	var TubeGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(TubeGeometry, _BufferGeometry);

		function TubeGeometry(path, tubularSegments, radius, radialSegments, closed) {
			var _this;

			if (tubularSegments === void 0) {
				tubularSegments = 64;
			}

			if (radius === void 0) {
				radius = 1;
			}

			if (radialSegments === void 0) {
				radialSegments = 8;
			}

			if (closed === void 0) {
				closed = false;
			}

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'TubeGeometry';
			_this.parameters = {
				path: path,
				tubularSegments: tubularSegments,
				radius: radius,
				radialSegments: radialSegments,
				closed: closed
			};
			var frames = path.computeFrenetFrames(tubularSegments, closed); // expose internals

			_this.tangents = frames.tangents;
			_this.normals = frames.normals;
			_this.binormals = frames.binormals; // helper variables

			var vertex = new Vector3();
			var normal = new Vector3();
			var uv = new Vector2();
			var P = new Vector3(); // buffer

			var vertices = [];
			var normals = [];
			var uvs = [];
			var indices = []; // create buffer data

			generateBufferData(); // build geometry

			_this.setIndex(indices);

			_this.setAttribute('position', new Float32BufferAttribute(vertices, 3));

			_this.setAttribute('normal', new Float32BufferAttribute(normals, 3));

			_this.setAttribute('uv', new Float32BufferAttribute(uvs, 2)); // functions


			function generateBufferData() {
				for (var i = 0; i < tubularSegments; i++) {
					generateSegment(i);
				} // if the geometry is not closed, generate the last row of vertices and normals
				// at the regular position on the given path
				//
				// if the geometry is closed, duplicate the first row of vertices and normals (uvs will differ)


				generateSegment(closed === false ? tubularSegments : 0); // uvs are generated in a separate function.
				// this makes it easy compute correct values for closed geometries

				generateUVs(); // finally create faces

				generateIndices();
			}

			function generateSegment(i) {
				// we use getPointAt to sample evenly distributed points from the given path
				P = path.getPointAt(i / tubularSegments, P); // retrieve corresponding normal and binormal

				var N = frames.normals[i];
				var B = frames.binormals[i]; // generate normals and vertices for the current segment

				for (var j = 0; j <= radialSegments; j++) {
					var v = j / radialSegments * Math.PI * 2;
					var sin = Math.sin(v);
					var cos = -Math.cos(v); // normal

					normal.x = cos * N.x + sin * B.x;
					normal.y = cos * N.y + sin * B.y;
					normal.z = cos * N.z + sin * B.z;
					normal.normalize();
					normals.push(normal.x, normal.y, normal.z); // vertex

					vertex.x = P.x + radius * normal.x;
					vertex.y = P.y + radius * normal.y;
					vertex.z = P.z + radius * normal.z;
					vertices.push(vertex.x, vertex.y, vertex.z);
				}
			}

			function generateIndices() {
				for (var j = 1; j <= tubularSegments; j++) {
					for (var i = 1; i <= radialSegments; i++) {
						var a = (radialSegments + 1) * (j - 1) + (i - 1);
						var b = (radialSegments + 1) * j + (i - 1);
						var c = (radialSegments + 1) * j + i;
						var d = (radialSegments + 1) * (j - 1) + i; // faces

						indices.push(a, b, d);
						indices.push(b, c, d);
					}
				}
			}

			function generateUVs() {
				for (var i = 0; i <= tubularSegments; i++) {
					for (var j = 0; j <= radialSegments; j++) {
						uv.x = i / tubularSegments;
						uv.y = j / radialSegments;
						uvs.push(uv.x, uv.y);
					}
				}
			}

			return _this;
		}

		var _proto = TubeGeometry.prototype;

		_proto.toJSON = function toJSON() {
			var data = BufferGeometry.prototype.toJSON.call(this);
			data.path = this.parameters.path.toJSON();
			return data;
		};

		return TubeGeometry;
	}(BufferGeometry);

	var WireframeGeometry = /*#__PURE__*/function (_BufferGeometry) {
		_inheritsLoose(WireframeGeometry, _BufferGeometry);

		function WireframeGeometry(geometry) {
			var _this;

			_this = _BufferGeometry.call(this) || this;
			_this.type = 'WireframeGeometry';

			if (geometry.isGeometry === true) {
				console.error('THREE.WireframeGeometry no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.');
				return _assertThisInitialized(_this);
			} // buffer


			var vertices = []; // helper variables

			var edge = [0, 0],
					edges = {};
			var vertex = new Vector3();

			if (geometry.index !== null) {
				// indexed BufferGeometry
				var position = geometry.attributes.position;
				var indices = geometry.index;
				var groups = geometry.groups;

				if (groups.length === 0) {
					groups = [{
						start: 0,
						count: indices.count,
						materialIndex: 0
					}];
				} // create a data structure that contains all eges without duplicates


				for (var o = 0, ol = groups.length; o < ol; ++o) {
					var group = groups[o];
					var start = group.start;
					var count = group.count;

					for (var i = start, l = start + count; i < l; i += 3) {
						for (var j = 0; j < 3; j++) {
							var edge1 = indices.getX(i + j);
							var edge2 = indices.getX(i + (j + 1) % 3);
							edge[0] = Math.min(edge1, edge2); // sorting prevents duplicates

							edge[1] = Math.max(edge1, edge2);
							var key = edge[0] + ',' + edge[1];

							if (edges[key] === undefined) {
								edges[key] = {
									index1: edge[0],
									index2: edge[1]
								};
							}
						}
					}
				} // generate vertices


				for (var _key in edges) {
					var e = edges[_key];
					vertex.fromBufferAttribute(position, e.index1);
					vertices.push(vertex.x, vertex.y, vertex.z);
					vertex.fromBufferAttribute(position, e.index2);
					vertices.push(vertex.x, vertex.y, vertex.z);
				}
			} else {
				// non-indexed BufferGeometry
				var _position = geometry.attributes.position;

				for (var _i = 0, _l = _position.count / 3; _i < _l; _i++) {
					for (var _j = 0; _j < 3; _j++) {
						// three edges per triangle, an edge is represented as (index1, index2)
						// e.g. the first triangle has the following edges: (0,1),(1,2),(2,0)
						var index1 = 3 * _i + _j;
						vertex.fromBufferAttribute(_position, index1);
						vertices.push(vertex.x, vertex.y, vertex.z);
						var index2 = 3 * _i + (_j + 1) % 3;
						vertex.fromBufferAttribute(_position, index2);
						vertices.push(vertex.x, vertex.y, vertex.z);
					}
				}
			} // build geometry


			_this.setAttribute('position', new Float32BufferAttribute(vertices, 3));

			return _this;
		}

		return WireframeGeometry;
	}(BufferGeometry);

	var Geometries = /*#__PURE__*/Object.freeze({
		__proto__: null,
		BoxGeometry: BoxGeometry,
		BoxBufferGeometry: BoxGeometry,
		CircleGeometry: CircleGeometry,
		CircleBufferGeometry: CircleGeometry,
		ConeGeometry: ConeGeometry,
		ConeBufferGeometry: ConeGeometry,
		CylinderGeometry: CylinderGeometry,
		CylinderBufferGeometry: CylinderGeometry,
		DodecahedronGeometry: DodecahedronGeometry,
		DodecahedronBufferGeometry: DodecahedronGeometry,
		EdgesGeometry: EdgesGeometry,
		ExtrudeGeometry: ExtrudeGeometry,
		ExtrudeBufferGeometry: ExtrudeGeometry,
		IcosahedronGeometry: IcosahedronGeometry,
		IcosahedronBufferGeometry: IcosahedronGeometry,
		LatheGeometry: LatheGeometry,
		LatheBufferGeometry: LatheGeometry,
		OctahedronGeometry: OctahedronGeometry,
		OctahedronBufferGeometry: OctahedronGeometry,
		ParametricGeometry: ParametricGeometry,
		ParametricBufferGeometry: ParametricGeometry,
		PlaneGeometry: PlaneGeometry,
		PlaneBufferGeometry: PlaneGeometry,
		PolyhedronGeometry: PolyhedronGeometry,
		PolyhedronBufferGeometry: PolyhedronGeometry,
		RingGeometry: RingGeometry,
		RingBufferGeometry: RingGeometry,
		ShapeGeometry: ShapeGeometry,
		ShapeBufferGeometry: ShapeGeometry,
		SphereGeometry: SphereGeometry,
		SphereBufferGeometry: SphereGeometry,
		TetrahedronGeometry: TetrahedronGeometry,
		TetrahedronBufferGeometry: TetrahedronGeometry,
		TextGeometry: TextGeometry,
		TextBufferGeometry: TextGeometry,
		TorusGeometry: TorusGeometry,
		TorusBufferGeometry: TorusGeometry,
		TorusKnotGeometry: TorusKnotGeometry,
		TorusKnotBufferGeometry: TorusKnotGeometry,
		TubeGeometry: TubeGeometry,
		TubeBufferGeometry: TubeGeometry,
		WireframeGeometry: WireframeGeometry
	});

	/**
	 * parameters = {
	 *	color: <THREE.Color>
	 * }
	 */

	function ShadowMaterial(parameters) {
		Material.call(this);
		this.type = 'ShadowMaterial';
		this.color = new Color(0x000000);
		this.transparent = true;
		this.setValues(parameters);
	}

	ShadowMaterial.prototype = Object.create(Material.prototype);
	ShadowMaterial.prototype.constructor = ShadowMaterial;
	ShadowMaterial.prototype.isShadowMaterial = true;

	ShadowMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.color.copy(source.color);
		return this;
	};

	function RawShaderMaterial(parameters) {
		ShaderMaterial.call(this, parameters);
		this.type = 'RawShaderMaterial';
	}

	RawShaderMaterial.prototype = Object.create(ShaderMaterial.prototype);
	RawShaderMaterial.prototype.constructor = RawShaderMaterial;
	RawShaderMaterial.prototype.isRawShaderMaterial = true;

	/**
	 * parameters = {
	 *	color: <hex>,
	 *	roughness: <float>,
	 *	metalness: <float>,
	 *	opacity: <float>,
	 *
	 *	map: new THREE.Texture( <Image> ),
	 *
	 *	lightMap: new THREE.Texture( <Image> ),
	 *	lightMapIntensity: <float>
	 *
	 *	aoMap: new THREE.Texture( <Image> ),
	 *	aoMapIntensity: <float>
	 *
	 *	emissive: <hex>,
	 *	emissiveIntensity: <float>
	 *	emissiveMap: new THREE.Texture( <Image> ),
	 *
	 *	bumpMap: new THREE.Texture( <Image> ),
	 *	bumpScale: <float>,
	 *
	 *	normalMap: new THREE.Texture( <Image> ),
	 *	normalMapType: THREE.TangentSpaceNormalMap,
	 *	normalScale: <Vector2>,
	 *
	 *	displacementMap: new THREE.Texture( <Image> ),
	 *	displacementScale: <float>,
	 *	displacementBias: <float>,
	 *
	 *	roughnessMap: new THREE.Texture( <Image> ),
	 *
	 *	metalnessMap: new THREE.Texture( <Image> ),
	 *
	 *	alphaMap: new THREE.Texture( <Image> ),
	 *
	 *	envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
	 *	envMapIntensity: <float>
	 *
	 *	refractionRatio: <float>,
	 *
	 *	wireframe: <boolean>,
	 *	wireframeLinewidth: <float>,
	 *
	 *	skinning: <bool>,
	 *	morphTargets: <bool>,
	 *	morphNormals: <bool>
	 * }
	 */

	function MeshStandardMaterial(parameters) {
		Material.call(this);
		this.defines = {
			'STANDARD': ''
		};
		this.type = 'MeshStandardMaterial';
		this.color = new Color(0xffffff); // diffuse

		this.roughness = 1.0;
		this.metalness = 0.0;
		this.map = null;
		this.lightMap = null;
		this.lightMapIntensity = 1.0;
		this.aoMap = null;
		this.aoMapIntensity = 1.0;
		this.emissive = new Color(0x000000);
		this.emissiveIntensity = 1.0;
		this.emissiveMap = null;
		this.bumpMap = null;
		this.bumpScale = 1;
		this.normalMap = null;
		this.normalMapType = TangentSpaceNormalMap;
		this.normalScale = new Vector2(1, 1);
		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;
		this.roughnessMap = null;
		this.metalnessMap = null;
		this.alphaMap = null;
		this.envMap = null;
		this.envMapIntensity = 1.0;
		this.refractionRatio = 0.98;
		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.wireframeLinecap = 'round';
		this.wireframeLinejoin = 'round';
		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;
		this.vertexTangents = false;
		this.setValues(parameters);
	}

	MeshStandardMaterial.prototype = Object.create(Material.prototype);
	MeshStandardMaterial.prototype.constructor = MeshStandardMaterial;
	MeshStandardMaterial.prototype.isMeshStandardMaterial = true;

	MeshStandardMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.defines = {
			'STANDARD': ''
		};
		this.color.copy(source.color);
		this.roughness = source.roughness;
		this.metalness = source.metalness;
		this.map = source.map;
		this.lightMap = source.lightMap;
		this.lightMapIntensity = source.lightMapIntensity;
		this.aoMap = source.aoMap;
		this.aoMapIntensity = source.aoMapIntensity;
		this.emissive.copy(source.emissive);
		this.emissiveMap = source.emissiveMap;
		this.emissiveIntensity = source.emissiveIntensity;
		this.bumpMap = source.bumpMap;
		this.bumpScale = source.bumpScale;
		this.normalMap = source.normalMap;
		this.normalMapType = source.normalMapType;
		this.normalScale.copy(source.normalScale);
		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;
		this.roughnessMap = source.roughnessMap;
		this.metalnessMap = source.metalnessMap;
		this.alphaMap = source.alphaMap;
		this.envMap = source.envMap;
		this.envMapIntensity = source.envMapIntensity;
		this.refractionRatio = source.refractionRatio;
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.wireframeLinecap = source.wireframeLinecap;
		this.wireframeLinejoin = source.wireframeLinejoin;
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;
		this.vertexTangents = source.vertexTangents;
		return this;
	};

	/**
	 * parameters = {
	 *	clearcoat: <float>,
	 *	clearcoatMap: new THREE.Texture( <Image> ),
	 *	clearcoatRoughness: <float>,
	 *	clearcoatRoughnessMap: new THREE.Texture( <Image> ),
	 *	clearcoatNormalScale: <Vector2>,
	 *	clearcoatNormalMap: new THREE.Texture( <Image> ),
	 *
	 *	reflectivity: <float>,
	 *	ior: <float>,
	 *
	 *	sheen: <Color>,
	 *
	 *	transmission: <float>,
	 *	transmissionMap: new THREE.Texture( <Image> )
	 * }
	 */

	function MeshPhysicalMaterial(parameters) {
		MeshStandardMaterial.call(this);
		this.defines = {
			'STANDARD': '',
			'PHYSICAL': ''
		};
		this.type = 'MeshPhysicalMaterial';
		this.clearcoat = 0.0;
		this.clearcoatMap = null;
		this.clearcoatRoughness = 0.0;
		this.clearcoatRoughnessMap = null;
		this.clearcoatNormalScale = new Vector2(1, 1);
		this.clearcoatNormalMap = null;
		this.reflectivity = 0.5; // maps to F0 = 0.04

		Object.defineProperty(this, 'ior', {
			get: function get() {
				return (1 + 0.4 * this.reflectivity) / (1 - 0.4 * this.reflectivity);
			},
			set: function set(ior) {
				this.reflectivity = MathUtils.clamp(2.5 * (ior - 1) / (ior + 1), 0, 1);
			}
		});
		this.sheen = null; // null will disable sheen bsdf

		this.transmission = 0.0;
		this.transmissionMap = null;
		this.setValues(parameters);
	}

	MeshPhysicalMaterial.prototype = Object.create(MeshStandardMaterial.prototype);
	MeshPhysicalMaterial.prototype.constructor = MeshPhysicalMaterial;
	MeshPhysicalMaterial.prototype.isMeshPhysicalMaterial = true;

	MeshPhysicalMaterial.prototype.copy = function (source) {
		MeshStandardMaterial.prototype.copy.call(this, source);
		this.defines = {
			'STANDARD': '',
			'PHYSICAL': ''
		};
		this.clearcoat = source.clearcoat;
		this.clearcoatMap = source.clearcoatMap;
		this.clearcoatRoughness = source.clearcoatRoughness;
		this.clearcoatRoughnessMap = source.clearcoatRoughnessMap;
		this.clearcoatNormalMap = source.clearcoatNormalMap;
		this.clearcoatNormalScale.copy(source.clearcoatNormalScale);
		this.reflectivity = source.reflectivity;

		if (source.sheen) {
			this.sheen = (this.sheen || new Color()).copy(source.sheen);
		} else {
			this.sheen = null;
		}

		this.transmission = source.transmission;
		this.transmissionMap = source.transmissionMap;
		return this;
	};

	/**
	 * parameters = {
	 *	color: <hex>,
	 *	specular: <hex>,
	 *	shininess: <float>,
	 *	opacity: <float>,
	 *
	 *	map: new THREE.Texture( <Image> ),
	 *
	 *	lightMap: new THREE.Texture( <Image> ),
	 *	lightMapIntensity: <float>
	 *
	 *	aoMap: new THREE.Texture( <Image> ),
	 *	aoMapIntensity: <float>
	 *
	 *	emissive: <hex>,
	 *	emissiveIntensity: <float>
	 *	emissiveMap: new THREE.Texture( <Image> ),
	 *
	 *	bumpMap: new THREE.Texture( <Image> ),
	 *	bumpScale: <float>,
	 *
	 *	normalMap: new THREE.Texture( <Image> ),
	 *	normalMapType: THREE.TangentSpaceNormalMap,
	 *	normalScale: <Vector2>,
	 *
	 *	displacementMap: new THREE.Texture( <Image> ),
	 *	displacementScale: <float>,
	 *	displacementBias: <float>,
	 *
	 *	specularMap: new THREE.Texture( <Image> ),
	 *
	 *	alphaMap: new THREE.Texture( <Image> ),
	 *
	 *	envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
	 *	combine: THREE.MultiplyOperation,
	 *	reflectivity: <float>,
	 *	refractionRatio: <float>,
	 *
	 *	wireframe: <boolean>,
	 *	wireframeLinewidth: <float>,
	 *
	 *	skinning: <bool>,
	 *	morphTargets: <bool>,
	 *	morphNormals: <bool>
	 * }
	 */

	function MeshPhongMaterial(parameters) {
		Material.call(this);
		this.type = 'MeshPhongMaterial';
		this.color = new Color(0xffffff); // diffuse

		this.specular = new Color(0x111111);
		this.shininess = 30;
		this.map = null;
		this.lightMap = null;
		this.lightMapIntensity = 1.0;
		this.aoMap = null;
		this.aoMapIntensity = 1.0;
		this.emissive = new Color(0x000000);
		this.emissiveIntensity = 1.0;
		this.emissiveMap = null;
		this.bumpMap = null;
		this.bumpScale = 1;
		this.normalMap = null;
		this.normalMapType = TangentSpaceNormalMap;
		this.normalScale = new Vector2(1, 1);
		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;
		this.specularMap = null;
		this.alphaMap = null;
		this.envMap = null;
		this.combine = MultiplyOperation;
		this.reflectivity = 1;
		this.refractionRatio = 0.98;
		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.wireframeLinecap = 'round';
		this.wireframeLinejoin = 'round';
		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;
		this.setValues(parameters);
	}

	MeshPhongMaterial.prototype = Object.create(Material.prototype);
	MeshPhongMaterial.prototype.constructor = MeshPhongMaterial;
	MeshPhongMaterial.prototype.isMeshPhongMaterial = true;

	MeshPhongMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.color.copy(source.color);
		this.specular.copy(source.specular);
		this.shininess = source.shininess;
		this.map = source.map;
		this.lightMap = source.lightMap;
		this.lightMapIntensity = source.lightMapIntensity;
		this.aoMap = source.aoMap;
		this.aoMapIntensity = source.aoMapIntensity;
		this.emissive.copy(source.emissive);
		this.emissiveMap = source.emissiveMap;
		this.emissiveIntensity = source.emissiveIntensity;
		this.bumpMap = source.bumpMap;
		this.bumpScale = source.bumpScale;
		this.normalMap = source.normalMap;
		this.normalMapType = source.normalMapType;
		this.normalScale.copy(source.normalScale);
		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;
		this.specularMap = source.specularMap;
		this.alphaMap = source.alphaMap;
		this.envMap = source.envMap;
		this.combine = source.combine;
		this.reflectivity = source.reflectivity;
		this.refractionRatio = source.refractionRatio;
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.wireframeLinecap = source.wireframeLinecap;
		this.wireframeLinejoin = source.wireframeLinejoin;
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;
		return this;
	};

	/**
	 * parameters = {
	 *	color: <hex>,
	 *
	 *	map: new THREE.Texture( <Image> ),
	 *	gradientMap: new THREE.Texture( <Image> ),
	 *
	 *	lightMap: new THREE.Texture( <Image> ),
	 *	lightMapIntensity: <float>
	 *
	 *	aoMap: new THREE.Texture( <Image> ),
	 *	aoMapIntensity: <float>
	 *
	 *	emissive: <hex>,
	 *	emissiveIntensity: <float>
	 *	emissiveMap: new THREE.Texture( <Image> ),
	 *
	 *	bumpMap: new THREE.Texture( <Image> ),
	 *	bumpScale: <float>,
	 *
	 *	normalMap: new THREE.Texture( <Image> ),
	 *	normalMapType: THREE.TangentSpaceNormalMap,
	 *	normalScale: <Vector2>,
	 *
	 *	displacementMap: new THREE.Texture( <Image> ),
	 *	displacementScale: <float>,
	 *	displacementBias: <float>,
	 *
	 *	alphaMap: new THREE.Texture( <Image> ),
	 *
	 *	wireframe: <boolean>,
	 *	wireframeLinewidth: <float>,
	 *
	 *	skinning: <bool>,
	 *	morphTargets: <bool>,
	 *	morphNormals: <bool>
	 * }
	 */

	function MeshToonMaterial(parameters) {
		Material.call(this);
		this.defines = {
			'TOON': ''
		};
		this.type = 'MeshToonMaterial';
		this.color = new Color(0xffffff);
		this.map = null;
		this.gradientMap = null;
		this.lightMap = null;
		this.lightMapIntensity = 1.0;
		this.aoMap = null;
		this.aoMapIntensity = 1.0;
		this.emissive = new Color(0x000000);
		this.emissiveIntensity = 1.0;
		this.emissiveMap = null;
		this.bumpMap = null;
		this.bumpScale = 1;
		this.normalMap = null;
		this.normalMapType = TangentSpaceNormalMap;
		this.normalScale = new Vector2(1, 1);
		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;
		this.alphaMap = null;
		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.wireframeLinecap = 'round';
		this.wireframeLinejoin = 'round';
		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;
		this.setValues(parameters);
	}

	MeshToonMaterial.prototype = Object.create(Material.prototype);
	MeshToonMaterial.prototype.constructor = MeshToonMaterial;
	MeshToonMaterial.prototype.isMeshToonMaterial = true;

	MeshToonMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.color.copy(source.color);
		this.map = source.map;
		this.gradientMap = source.gradientMap;
		this.lightMap = source.lightMap;
		this.lightMapIntensity = source.lightMapIntensity;
		this.aoMap = source.aoMap;
		this.aoMapIntensity = source.aoMapIntensity;
		this.emissive.copy(source.emissive);
		this.emissiveMap = source.emissiveMap;
		this.emissiveIntensity = source.emissiveIntensity;
		this.bumpMap = source.bumpMap;
		this.bumpScale = source.bumpScale;
		this.normalMap = source.normalMap;
		this.normalMapType = source.normalMapType;
		this.normalScale.copy(source.normalScale);
		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;
		this.alphaMap = source.alphaMap;
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.wireframeLinecap = source.wireframeLinecap;
		this.wireframeLinejoin = source.wireframeLinejoin;
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;
		return this;
	};

	/**
	 * parameters = {
	 *	opacity: <float>,
	 *
	 *	bumpMap: new THREE.Texture( <Image> ),
	 *	bumpScale: <float>,
	 *
	 *	normalMap: new THREE.Texture( <Image> ),
	 *	normalMapType: THREE.TangentSpaceNormalMap,
	 *	normalScale: <Vector2>,
	 *
	 *	displacementMap: new THREE.Texture( <Image> ),
	 *	displacementScale: <float>,
	 *	displacementBias: <float>,
	 *
	 *	wireframe: <boolean>,
	 *	wireframeLinewidth: <float>
	 *
	 *	skinning: <bool>,
	 *	morphTargets: <bool>,
	 *	morphNormals: <bool>
	 * }
	 */

	function MeshNormalMaterial(parameters) {
		Material.call(this);
		this.type = 'MeshNormalMaterial';
		this.bumpMap = null;
		this.bumpScale = 1;
		this.normalMap = null;
		this.normalMapType = TangentSpaceNormalMap;
		this.normalScale = new Vector2(1, 1);
		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;
		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.fog = false;
		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;
		this.setValues(parameters);
	}

	MeshNormalMaterial.prototype = Object.create(Material.prototype);
	MeshNormalMaterial.prototype.constructor = MeshNormalMaterial;
	MeshNormalMaterial.prototype.isMeshNormalMaterial = true;

	MeshNormalMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.bumpMap = source.bumpMap;
		this.bumpScale = source.bumpScale;
		this.normalMap = source.normalMap;
		this.normalMapType = source.normalMapType;
		this.normalScale.copy(source.normalScale);
		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;
		return this;
	};

	/**
	 * parameters = {
	 *	color: <hex>,
	 *	opacity: <float>,
	 *
	 *	map: new THREE.Texture( <Image> ),
	 *
	 *	lightMap: new THREE.Texture( <Image> ),
	 *	lightMapIntensity: <float>
	 *
	 *	aoMap: new THREE.Texture( <Image> ),
	 *	aoMapIntensity: <float>
	 *
	 *	emissive: <hex>,
	 *	emissiveIntensity: <float>
	 *	emissiveMap: new THREE.Texture( <Image> ),
	 *
	 *	specularMap: new THREE.Texture( <Image> ),
	 *
	 *	alphaMap: new THREE.Texture( <Image> ),
	 *
	 *	envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
	 *	combine: THREE.Multiply,
	 *	reflectivity: <float>,
	 *	refractionRatio: <float>,
	 *
	 *	wireframe: <boolean>,
	 *	wireframeLinewidth: <float>,
	 *
	 *	skinning: <bool>,
	 *	morphTargets: <bool>,
	 *	morphNormals: <bool>
	 * }
	 */

	function MeshLambertMaterial(parameters) {
		Material.call(this);
		this.type = 'MeshLambertMaterial';
		this.color = new Color(0xffffff); // diffuse

		this.map = null;
		this.lightMap = null;
		this.lightMapIntensity = 1.0;
		this.aoMap = null;
		this.aoMapIntensity = 1.0;
		this.emissive = new Color(0x000000);
		this.emissiveIntensity = 1.0;
		this.emissiveMap = null;
		this.specularMap = null;
		this.alphaMap = null;
		this.envMap = null;
		this.combine = MultiplyOperation;
		this.reflectivity = 1;
		this.refractionRatio = 0.98;
		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.wireframeLinecap = 'round';
		this.wireframeLinejoin = 'round';
		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;
		this.setValues(parameters);
	}

	MeshLambertMaterial.prototype = Object.create(Material.prototype);
	MeshLambertMaterial.prototype.constructor = MeshLambertMaterial;
	MeshLambertMaterial.prototype.isMeshLambertMaterial = true;

	MeshLambertMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.color.copy(source.color);
		this.map = source.map;
		this.lightMap = source.lightMap;
		this.lightMapIntensity = source.lightMapIntensity;
		this.aoMap = source.aoMap;
		this.aoMapIntensity = source.aoMapIntensity;
		this.emissive.copy(source.emissive);
		this.emissiveMap = source.emissiveMap;
		this.emissiveIntensity = source.emissiveIntensity;
		this.specularMap = source.specularMap;
		this.alphaMap = source.alphaMap;
		this.envMap = source.envMap;
		this.combine = source.combine;
		this.reflectivity = source.reflectivity;
		this.refractionRatio = source.refractionRatio;
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.wireframeLinecap = source.wireframeLinecap;
		this.wireframeLinejoin = source.wireframeLinejoin;
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;
		return this;
	};

	/**
	 * parameters = {
	 *	color: <hex>,
	 *	opacity: <float>,
	 *
	 *	matcap: new THREE.Texture( <Image> ),
	 *
	 *	map: new THREE.Texture( <Image> ),
	 *
	 *	bumpMap: new THREE.Texture( <Image> ),
	 *	bumpScale: <float>,
	 *
	 *	normalMap: new THREE.Texture( <Image> ),
	 *	normalMapType: THREE.TangentSpaceNormalMap,
	 *	normalScale: <Vector2>,
	 *
	 *	displacementMap: new THREE.Texture( <Image> ),
	 *	displacementScale: <float>,
	 *	displacementBias: <float>,
	 *
	 *	alphaMap: new THREE.Texture( <Image> ),
	 *
	 *	skinning: <bool>,
	 *	morphTargets: <bool>,
	 *	morphNormals: <bool>
	 * }
	 */

	function MeshMatcapMaterial(parameters) {
		Material.call(this);
		this.defines = {
			'MATCAP': ''
		};
		this.type = 'MeshMatcapMaterial';
		this.color = new Color(0xffffff); // diffuse

		this.matcap = null;
		this.map = null;
		this.bumpMap = null;
		this.bumpScale = 1;
		this.normalMap = null;
		this.normalMapType = TangentSpaceNormalMap;
		this.normalScale = new Vector2(1, 1);
		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;
		this.alphaMap = null;
		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;
		this.setValues(parameters);
	}

	MeshMatcapMaterial.prototype = Object.create(Material.prototype);
	MeshMatcapMaterial.prototype.constructor = MeshMatcapMaterial;
	MeshMatcapMaterial.prototype.isMeshMatcapMaterial = true;

	MeshMatcapMaterial.prototype.copy = function (source) {
		Material.prototype.copy.call(this, source);
		this.defines = {
			'MATCAP': ''
		};
		this.color.copy(source.color);
		this.matcap = source.matcap;
		this.map = source.map;
		this.bumpMap = source.bumpMap;
		this.bumpScale = source.bumpScale;
		this.normalMap = source.normalMap;
		this.normalMapType = source.normalMapType;
		this.normalScale.copy(source.normalScale);
		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;
		this.alphaMap = source.alphaMap;
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;
		return this;
	};

	/**
	 * parameters = {
	 *	color: <hex>,
	 *	opacity: <float>,
	 *
	 *	linewidth: <float>,
	 *
	 *	scale: <float>,
	 *	dashSize: <float>,
	 *	gapSize: <float>
	 * }
	 */

	function LineDashedMaterial(parameters) {
		LineBasicMaterial.call(this);
		this.type = 'LineDashedMaterial';
		this.scale = 1;
		this.dashSize = 3;
		this.gapSize = 1;
		this.setValues(parameters);
	}

	LineDashedMaterial.prototype = Object.create(LineBasicMaterial.prototype);
	LineDashedMaterial.prototype.constructor = LineDashedMaterial;
	LineDashedMaterial.prototype.isLineDashedMaterial = true;

	LineDashedMaterial.prototype.copy = function (source) {
		LineBasicMaterial.prototype.copy.call(this, source);
		this.scale = source.scale;
		this.dashSize = source.dashSize;
		this.gapSize = source.gapSize;
		return this;
	};

	var Materials = /*#__PURE__*/Object.freeze({
		__proto__: null,
		ShadowMaterial: ShadowMaterial,
		SpriteMaterial: SpriteMaterial,
		RawShaderMaterial: RawShaderMaterial,
		ShaderMaterial: ShaderMaterial,
		PointsMaterial: PointsMaterial,
		MeshPhysicalMaterial: MeshPhysicalMaterial,
		MeshStandardMaterial: MeshStandardMaterial,
		MeshPhongMaterial: MeshPhongMaterial,
		MeshToonMaterial: MeshToonMaterial,
		MeshNormalMaterial: MeshNormalMaterial,
		MeshLambertMaterial: MeshLambertMaterial,
		MeshDepthMaterial: MeshDepthMaterial,
		MeshDistanceMaterial: MeshDistanceMaterial,
		MeshBasicMaterial: MeshBasicMaterial,
		MeshMatcapMaterial: MeshMatcapMaterial,
		LineDashedMaterial: LineDashedMaterial,
		LineBasicMaterial: LineBasicMaterial,
		Material: Material
	});

	var AnimationUtils = {
		// same as Array.prototype.slice, but also works on typed arrays
		arraySlice: function arraySlice(array, from, to) {
			if (AnimationUtils.isTypedArray(array)) {
				// in ios9 array.subarray(from, undefined) will return empty array
				// but array.subarray(from) or array.subarray(from, len) is correct
				return new array.constructor(array.subarray(from, to !== undefined ? to : array.length));
			}

			return array.slice(from, to);
		},
		// converts an array to a specific type
		convertArray: function convertArray(array, type, forceClone) {
			if (!array || // let 'undefined' and 'null' pass
			!forceClone && array.constructor === type) return array;

			if (typeof type.BYTES_PER_ELEMENT === 'number') {
				return new type(array); // create typed array
			}

			return Array.prototype.slice.call(array); // create Array
		},
		isTypedArray: function isTypedArray(object) {
			return ArrayBuffer.isView(object) && !(object instanceof DataView);
		},
		// returns an array by which times and values can be sorted
		getKeyframeOrder: function getKeyframeOrder(times) {
			function compareTime(i, j) {
				return times[i] - times[j];
			}

			var n = times.length;
			var result = new Array(n);

			for (var i = 0; i !== n; ++i) {
				result[i] = i;
			}

			result.sort(compareTime);
			return result;
		},
		// uses the array previously returned by 'getKeyframeOrder' to sort data
		sortedArray: function sortedArray(values, stride, order) {
			var nValues = values.length;
			var result = new values.constructor(nValues);

			for (var i = 0, dstOffset = 0; dstOffset !== nValues; ++i) {
				var srcOffset = order[i] * stride;

				for (var j = 0; j !== stride; ++j) {
					result[dstOffset++] = values[srcOffset + j];
				}
			}

			return result;
		},
		// function for parsing AOS keyframe formats
		flattenJSON: function flattenJSON(jsonKeys, times, values, valuePropertyName) {
			var i = 1,
					key = jsonKeys[0];

			while (key !== undefined && key[valuePropertyName] === undefined) {
				key = jsonKeys[i++];
			}

			if (key === undefined) return; // no data

			var value = key[valuePropertyName];
			if (value === undefined) return; // no data

			if (Array.isArray(value)) {
				do {
					value = key[valuePropertyName];

					if (value !== undefined) {
						times.push(key.time);
						values.push.apply(values, value); // push all elements
					}

					key = jsonKeys[i++];
				} while (key !== undefined);
			} else if (value.toArray !== undefined) {
				// ...assume THREE.Math-ish
				do {
					value = key[valuePropertyName];

					if (value !== undefined) {
						times.push(key.time);
						value.toArray(values, values.length);
					}

					key = jsonKeys[i++];
				} while (key !== undefined);
			} else {
				// otherwise push as-is
				do {
					value = key[valuePropertyName];

					if (value !== undefined) {
						times.push(key.time);
						values.push(value);
					}

					key = jsonKeys[i++];
				} while (key !== undefined);
			}
		},
		subclip: function subclip(sourceClip, name, startFrame, endFrame, fps) {
			if (fps === void 0) {
				fps = 30;
			}

			var clip = sourceClip.clone();
			clip.name = name;
			var tracks = [];

			for (var i = 0; i < clip.tracks.length; ++i) {
				var track = clip.tracks[i];
				var valueSize = track.getValueSize();
				var times = [];
				var values = [];

				for (var j = 0; j < track.times.length; ++j) {
					var frame = track.times[j] * fps;
					if (frame < startFrame || frame >= endFrame) continue;
					times.push(track.times[j]);

					for (var k = 0; k < valueSize; ++k) {
						values.push(track.values[j * valueSize + k]);
					}
				}

				if (times.length === 0) continue;
				track.times = AnimationUtils.convertArray(times, track.times.constructor);
				track.values = AnimationUtils.convertArray(values, track.values.constructor);
				tracks.push(track);
			}

			clip.tracks = tracks; // find minimum .times value across all tracks in the trimmed clip

			var minStartTime = Infinity;

			for (var _i = 0; _i < clip.tracks.length; ++_i) {
				if (minStartTime > clip.tracks[_i].times[0]) {
					minStartTime = clip.tracks[_i].times[0];
				}
			} // shift all tracks such that clip begins at t=0


			for (var _i2 = 0; _i2 < clip.tracks.length; ++_i2) {
				clip.tracks[_i2].shift(-1 * minStartTime);
			}

			clip.resetDuration();
			return clip;
		},
		makeClipAdditive: function makeClipAdditive(targetClip, referenceFrame, referenceClip, fps) {
			if (referenceFrame === void 0) {
				referenceFrame = 0;
			}

			if (referenceClip === void 0) {
				referenceClip = targetClip;
			}

			if (fps === void 0) {
				fps = 30;
			}

			if (fps <= 0) fps = 30;
			var numTracks = referenceClip.tracks.length;
			var referenceTime = referenceFrame / fps; // Make each track's values relative to the values at the reference frame

			var _loop = function _loop(i) {
				var referenceTrack = referenceClip.tracks[i];
				var referenceTrackType = referenceTrack.ValueTypeName; // Skip this track if it's non-numeric

				if (referenceTrackType === 'bool' || referenceTrackType === 'string') return "continue"; // Find the track in the target clip whose name and type matches the reference track

				var targetTrack = targetClip.tracks.find(function (track) {
					return track.name === referenceTrack.name && track.ValueTypeName === referenceTrackType;
				});
				if (targetTrack === undefined) return "continue";
				var referenceOffset = 0;
				var referenceValueSize = referenceTrack.getValueSize();

				if (referenceTrack.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline) {
					referenceOffset = referenceValueSize / 3;
				}

				var targetOffset = 0;
				var targetValueSize = targetTrack.getValueSize();

				if (targetTrack.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline) {
					targetOffset = targetValueSize / 3;
				}

				var lastIndex = referenceTrack.times.length - 1;
				var referenceValue = void 0; // Find the value to subtract out of the track

				if (referenceTime <= referenceTrack.times[0]) {
					// Reference frame is earlier than the first keyframe, so just use the first keyframe
					var startIndex = referenceOffset;
					var endIndex = referenceValueSize - referenceOffset;
					referenceValue = AnimationUtils.arraySlice(referenceTrack.values, startIndex, endIndex);
				} else if (referenceTime >= referenceTrack.times[lastIndex]) {
					// Reference frame is after the last keyframe, so just use the last keyframe
					var _startIndex = lastIndex * referenceValueSize + referenceOffset;

					var _endIndex = _startIndex + referenceValueSize - referenceOffset;

					referenceValue = AnimationUtils.arraySlice(referenceTrack.values, _startIndex, _endIndex);
				} else {
					// Interpolate to the reference value
					var interpolant = referenceTrack.createInterpolant();
					var _startIndex2 = referenceOffset;

					var _endIndex2 = referenceValueSize - referenceOffset;

					interpolant.evaluate(referenceTime);
					referenceValue = AnimationUtils.arraySlice(interpolant.resultBuffer, _startIndex2, _endIndex2);
				} // Conjugate the quaternion


				if (referenceTrackType === 'quaternion') {
					var referenceQuat = new Quaternion().fromArray(referenceValue).normalize().conjugate();
					referenceQuat.toArray(referenceValue);
				} // Subtract the reference value from all of the track values


				var numTimes = targetTrack.times.length;

				for (var j = 0; j < numTimes; ++j) {
					var valueStart = j * targetValueSize + targetOffset;

					if (referenceTrackType === 'quaternion') {
						// Multiply the conjugate for quaternion track types
						Quaternion.multiplyQuaternionsFlat(targetTrack.values, valueStart, referenceValue, 0, targetTrack.values, valueStart);
					} else {
						var valueEnd = targetValueSize - targetOffset * 2; // Subtract each value for all other numeric track types

						for (var k = 0; k < valueEnd; ++k) {
							targetTrack.values[valueStart + k] -= referenceValue[k];
						}
					}
				}
			};

			for (var i = 0; i < numTracks; ++i) {
				var _ret = _loop(i);

				if (_ret === "continue") continue;
			}

			targetClip.blendMode = AdditiveAnimationBlendMode;
			return targetClip;
		}
	};

	/**
	 * Abstract base class of interpolants over parametric samples.
	 *
	 * The parameter domain is one dimensional, typically the time or a path
	 * along a curve defined by the data.
	 *
	 * The sample values can have any dimensionality and derived classes may
	 * apply special interpretations to the data.
	 *
	 * This class provides the interval seek in a Template Method, deferring
	 * the actual interpolation to derived classes.
	 *
	 * Time complexity is O(1) for linear access crossing at most two points
	 * and O(log N) for random access, where N is the number of positions.
	 *
	 * References:
	 *
	 * 		http://www.oodesign.com/template-method-pattern.html
	 *
	 */
	function Interpolant(parameterPositions, sampleValues, sampleSize, resultBuffer) {
		this.parameterPositions = parameterPositions;
		this._cachedIndex = 0;
		this.resultBuffer = resultBuffer !== undefined ? resultBuffer : new sampleValues.constructor(sampleSize);
		this.sampleValues = sampleValues;
		this.valueSize = sampleSize;
	}

	Object.assign(Interpolant.prototype, {
		evaluate: function evaluate(t) {
			var pp = this.parameterPositions;
			var i1 = this._cachedIndex,
					t1 = pp[i1],
					t0 = pp[i1 - 1];

			validate_interval: {
				seek: {
					var right;

					linear_scan: {
						//- See http://jsperf.com/comparison-to-undefined/3
						//- slower code:
						//-
						//- 				if ( t >= t1 || t1 === undefined ) {
						forward_scan: if (!(t < t1)) {
							for (var giveUpAt = i1 + 2;;) {
								if (t1 === undefined) {
									if (t < t0) break forward_scan; // after end

									i1 = pp.length;
									this._cachedIndex = i1;
									return this.afterEnd_(i1 - 1, t, t0);
								}

								if (i1 === giveUpAt) break; // this loop

								t0 = t1;
								t1 = pp[++i1];

								if (t < t1) {
									// we have arrived at the sought interval
									break seek;
								}
							} // prepare binary search on the right side of the index


							right = pp.length;
							break linear_scan;
						} //- slower code:
						//-					if ( t < t0 || t0 === undefined ) {


						if (!(t >= t0)) {
							// looping?
							var t1global = pp[1];

							if (t < t1global) {
								i1 = 2; // + 1, using the scan for the details

								t0 = t1global;
							} // linear reverse scan


							for (var _giveUpAt = i1 - 2;;) {
								if (t0 === undefined) {
									// before start
									this._cachedIndex = 0;
									return this.beforeStart_(0, t, t1);
								}

								if (i1 === _giveUpAt) break; // this loop

								t1 = t0;
								t0 = pp[--i1 - 1];

								if (t >= t0) {
									// we have arrived at the sought interval
									break seek;
								}
							} // prepare binary search on the left side of the index


							right = i1;
							i1 = 0;
							break linear_scan;
						} // the interval is valid


						break validate_interval;
					} // linear scan
					// binary search


					while (i1 < right) {
						var mid = i1 + right >>> 1;

						if (t < pp[mid]) {
							right = mid;
						} else {
							i1 = mid + 1;
						}
					}

					t1 = pp[i1];
					t0 = pp[i1 - 1]; // check boundary cases, again

					if (t0 === undefined) {
						this._cachedIndex = 0;
						return this.beforeStart_(0, t, t1);
					}

					if (t1 === undefined) {
						i1 = pp.length;
						this._cachedIndex = i1;
						return this.afterEnd_(i1 - 1, t0, t);
					}
				} // seek


				this._cachedIndex = i1;
				this.intervalChanged_(i1, t0, t1);
			} // validate_interval


			return this.interpolate_(i1, t0, t, t1);
		},
		settings: null,
		// optional, subclass-specific settings structure
		// Note: The indirection allows central control of many interpolants.
		// --- Protected interface
		DefaultSettings_: {},
		getSettings_: function getSettings_() {
			return this.settings || this.DefaultSettings_;
		},
		copySampleValue_: function copySampleValue_(index) {
			// copies a sample value to the result buffer
			var result = this.resultBuffer,
					values = this.sampleValues,
					stride = this.valueSize,
					offset = index * stride;

			for (var i = 0; i !== stride; ++i) {
				result[i] = values[offset + i];
			}

			return result;
		},
		// Template methods for derived classes:
		interpolate_: function interpolate_()
		/* i1, t0, t, t1 */
		{
			throw new Error('call to abstract method'); // implementations shall return this.resultBuffer
		},
		intervalChanged_: function intervalChanged_()
		/* i1, t0, t1 */
		{// empty
		}
	}); // DECLARE ALIAS AFTER assign prototype

	Object.assign(Interpolant.prototype, {
		//( 0, t, t0 ), returns this.resultBuffer
		beforeStart_: Interpolant.prototype.copySampleValue_,
		//( N-1, tN-1, t ), returns this.resultBuffer
		afterEnd_: Interpolant.prototype.copySampleValue_
	});

	/**
	 * Fast and simple cubic spline interpolant.
	 *
	 * It was derived from a Hermitian construction setting the first derivative
	 * at each sample position to the linear slope between neighboring positions
	 * over their parameter interval.
	 */

	function CubicInterpolant(parameterPositions, sampleValues, sampleSize, resultBuffer) {
		Interpolant.call(this, parameterPositions, sampleValues, sampleSize, resultBuffer);
		this._weightPrev = -0;
		this._offsetPrev = -0;
		this._weightNext = -0;
		this._offsetNext = -0;
	}

	CubicInterpolant.prototype = Object.assign(Object.create(Interpolant.prototype), {
		constructor: CubicInterpolant,
		DefaultSettings_: {
			endingStart: ZeroCurvatureEnding,
			endingEnd: ZeroCurvatureEnding
		},
		intervalChanged_: function intervalChanged_(i1, t0, t1) {
			var pp = this.parameterPositions;
			var iPrev = i1 - 2,
					iNext = i1 + 1,
					tPrev = pp[iPrev],
					tNext = pp[iNext];

			if (tPrev === undefined) {
				switch (this.getSettings_().endingStart) {
					case ZeroSlopeEnding:
						// f'(t0) = 0
						iPrev = i1;
						tPrev = 2 * t0 - t1;
						break;

					case WrapAroundEnding:
						// use the other end of the curve
						iPrev = pp.length - 2;
						tPrev = t0 + pp[iPrev] - pp[iPrev + 1];
						break;

					default:
						// ZeroCurvatureEnding
						// f''(t0) = 0 a.k.a. Natural Spline
						iPrev = i1;
						tPrev = t1;
				}
			}

			if (tNext === undefined) {
				switch (this.getSettings_().endingEnd) {
					case ZeroSlopeEnding:
						// f'(tN) = 0
						iNext = i1;
						tNext = 2 * t1 - t0;
						break;

					case WrapAroundEnding:
						// use the other end of the curve
						iNext = 1;
						tNext = t1 + pp[1] - pp[0];
						break;

					default:
						// ZeroCurvatureEnding
						// f''(tN) = 0, a.k.a. Natural Spline
						iNext = i1 - 1;
						tNext = t0;
				}
			}

			var halfDt = (t1 - t0) * 0.5,
					stride = this.valueSize;
			this._weightPrev = halfDt / (t0 - tPrev);
			this._weightNext = halfDt / (tNext - t1);
			this._offsetPrev = iPrev * stride;
			this._offsetNext = iNext * stride;
		},
		interpolate_: function interpolate_(i1, t0, t, t1) {
			var result = this.resultBuffer,
					values = this.sampleValues,
					stride = this.valueSize,
					o1 = i1 * stride,
					o0 = o1 - stride,
					oP = this._offsetPrev,
					oN = this._offsetNext,
					wP = this._weightPrev,
					wN = this._weightNext,
					p = (t - t0) / (t1 - t0),
					pp = p * p,
					ppp = pp * p; // evaluate polynomials

			var sP = -wP * ppp + 2 * wP * pp - wP * p;
			var s0 = (1 + wP) * ppp + (-1.5 - 2 * wP) * pp + (-0.5 + wP) * p + 1;
			var s1 = (-1 - wN) * ppp + (1.5 + wN) * pp + 0.5 * p;
			var sN = wN * ppp - wN * pp; // combine data linearly

			for (var i = 0; i !== stride; ++i) {
				result[i] = sP * values[oP + i] + s0 * values[o0 + i] + s1 * values[o1 + i] + sN * values[oN + i];
			}

			return result;
		}
	});

	function LinearInterpolant(parameterPositions, sampleValues, sampleSize, resultBuffer) {
		Interpolant.call(this, parameterPositions, sampleValues, sampleSize, resultBuffer);
	}

	LinearInterpolant.prototype = Object.assign(Object.create(Interpolant.prototype), {
		constructor: LinearInterpolant,
		interpolate_: function interpolate_(i1, t0, t, t1) {
			var result = this.resultBuffer,
					values = this.sampleValues,
					stride = this.valueSize,
					offset1 = i1 * stride,
					offset0 = offset1 - stride,
					weight1 = (t - t0) / (t1 - t0),
					weight0 = 1 - weight1;

			for (var i = 0; i !== stride; ++i) {
				result[i] = values[offset0 + i] * weight0 + values[offset1 + i] * weight1;
			}

			return result;
		}
	});

	/**
	 *
	 * Interpolant that evaluates to the sample value at the position preceeding
	 * the parameter.
	 */

	function DiscreteInterpolant(parameterPositions, sampleValues, sampleSize, resultBuffer) {
		Interpolant.call(this, parameterPositions, sampleValues, sampleSize, resultBuffer);
	}

	DiscreteInterpolant.prototype = Object.assign(Object.create(Interpolant.prototype), {
		constructor: DiscreteInterpolant,
		interpolate_: function interpolate_(i1
		/*, t0, t, t1 */
		) {
			return this.copySampleValue_(i1 - 1);
		}
	});

	function KeyframeTrack(name, times, values, interpolation) {
		if (name === undefined) throw new Error('THREE.KeyframeTrack: track name is undefined');
		if (times === undefined || times.length === 0) throw new Error('THREE.KeyframeTrack: no keyframes in track named ' + name);
		this.name = name;
		this.times = AnimationUtils.convertArray(times, this.TimeBufferType);
		this.values = AnimationUtils.convertArray(values, this.ValueBufferType);
		this.setInterpolation(interpolation || this.DefaultInterpolation);
	} // Static methods


	Object.assign(KeyframeTrack, {
		// Serialization (in static context, because of constructor invocation
		// and automatic invocation of .toJSON):
		toJSON: function toJSON(track) {
			var trackType = track.constructor;
			var json; // derived classes can define a static toJSON method

			if (trackType.toJSON !== undefined) {
				json = trackType.toJSON(track);
			} else {
				// by default, we assume the data can be serialized as-is
				json = {
					'name': track.name,
					'times': AnimationUtils.convertArray(track.times, Array),
					'values': AnimationUtils.convertArray(track.values, Array)
				};
				var interpolation = track.getInterpolation();

				if (interpolation !== track.DefaultInterpolation) {
					json.interpolation = interpolation;
				}
			}

			json.type = track.ValueTypeName; // mandatory

			return json;
		}
	});
	Object.assign(KeyframeTrack.prototype, {
		constructor: KeyframeTrack,
		TimeBufferType: Float32Array,
		ValueBufferType: Float32Array,
		DefaultInterpolation: InterpolateLinear,
		InterpolantFactoryMethodDiscrete: function InterpolantFactoryMethodDiscrete(result) {
			return new DiscreteInterpolant(this.times, this.values, this.getValueSize(), result);
		},
		InterpolantFactoryMethodLinear: function InterpolantFactoryMethodLinear(result) {
			return new LinearInterpolant(this.times, this.values, this.getValueSize(), result);
		},
		InterpolantFactoryMethodSmooth: function InterpolantFactoryMethodSmooth(result) {
			return new CubicInterpolant(this.times, this.values, this.getValueSize(), result);
		},
		setInterpolation: function setInterpolation(interpolation) {
			var factoryMethod;

			switch (interpolation) {
				case InterpolateDiscrete:
					factoryMethod = this.InterpolantFactoryMethodDiscrete;
					break;

				case InterpolateLinear:
					factoryMethod = this.InterpolantFactoryMethodLinear;
					break;

				case InterpolateSmooth:
					factoryMethod = this.InterpolantFactoryMethodSmooth;
					break;
			}

			if (factoryMethod === undefined) {
				var message = 'unsupported interpolation for ' + this.ValueTypeName + ' keyframe track named ' + this.name;

				if (this.createInterpolant === undefined) {
					// fall back to default, unless the default itself is messed up
					if (interpolation !== this.DefaultInterpolation) {
						this.setInterpolation(this.DefaultInterpolation);
					} else {
						throw new Error(message); // fatal, in this case
					}
				}

				console.warn('THREE.KeyframeTrack:', message);
				return this;
			}

			this.createInterpolant = factoryMethod;
			return this;
		},
		getInterpolation: function getInterpolation() {
			switch (this.createInterpolant) {
				case this.InterpolantFactoryMethodDiscrete:
					return InterpolateDiscrete;

				case this.InterpolantFactoryMethodLinear:
					return InterpolateLinear;

				case this.InterpolantFactoryMethodSmooth:
					return InterpolateSmooth;
			}
		},
		getValueSize: function getValueSize() {
			return this.values.length / this.times.length;
		},
		// move all keyframes either forwards or backwards in time
		shift: function shift(timeOffset) {
			if (timeOffset !== 0.0) {
				var times = this.times;

				for (var i = 0, n = times.length; i !== n; ++i) {
					times[i] += timeOffset;
				}
			}

			return this;
		},
		// scale all keyframe times by a factor (useful for frame <-> seconds conversions)
		scale: function scale(timeScale) {
			if (timeScale !== 1.0) {
				var times = this.times;

				for (var i = 0, n = times.length; i !== n; ++i) {
					times[i] *= timeScale;
				}
			}

			return this;
		},
		// removes keyframes before and after animation without changing any values within the range [startTime, endTime].
		// IMPORTANT: We do not shift around keys to the start of the track time, because for interpolated keys this will change their values
		trim: function trim(startTime, endTime) {
			var times = this.times,
					nKeys = times.length;
			var from = 0,
					to = nKeys - 1;

			while (from !== nKeys && times[from] < startTime) {
				++from;
			}

			while (to !== -1 && times[to] > endTime) {
				--to;
			}

			++to; // inclusive -> exclusive bound

			if (from !== 0 || to !== nKeys) {
				// empty tracks are forbidden, so keep at least one keyframe
				if (from >= to) {
					to = Math.max(to, 1);
					from = to - 1;
				}

				var stride = this.getValueSize();
				this.times = AnimationUtils.arraySlice(times, from, to);
				this.values = AnimationUtils.arraySlice(this.values, from * stride, to * stride);
			}

			return this;
		},
		// ensure we do not get a GarbageInGarbageOut situation, make sure tracks are at least minimally viable
		validate: function validate() {
			var valid = true;
			var valueSize = this.getValueSize();

			if (valueSize - Math.floor(valueSize) !== 0) {
				console.error('THREE.KeyframeTrack: Invalid value size in track.', this);
				valid = false;
			}

			var times = this.times,
					values = this.values,
					nKeys = times.length;

			if (nKeys === 0) {
				console.error('THREE.KeyframeTrack: Track is empty.', this);
				valid = false;
			}

			var prevTime = null;

			for (var i = 0; i !== nKeys; i++) {
				var currTime = times[i];

				if (typeof currTime === 'number' && isNaN(currTime)) {
					console.error('THREE.KeyframeTrack: Time is not a valid number.', this, i, currTime);
					valid = false;
					break;
				}

				if (prevTime !== null && prevTime > currTime) {
					console.error('THREE.KeyframeTrack: Out of order keys.', this, i, currTime, prevTime);
					valid = false;
					break;
				}

				prevTime = currTime;
			}

			if (values !== undefined) {
				if (AnimationUtils.isTypedArray(values)) {
					for (var _i = 0, n = values.length; _i !== n; ++_i) {
						var value = values[_i];

						if (isNaN(value)) {
							console.error('THREE.KeyframeTrack: Value is not a valid number.', this, _i, value);
							valid = false;
							break;
						}
					}
				}
			}

			return valid;
		},
		// removes equivalent sequential keys as common in morph target sequences
		// (0,0,0,0,1,1,1,0,0,0,0,0,0,0) --> (0,0,1,1,0,0)
		optimize: function optimize() {
			// times or values may be shared with other tracks, so overwriting is unsafe
			var times = AnimationUtils.arraySlice(this.times),
					values = AnimationUtils.arraySlice(this.values),
					stride = this.getValueSize(),
					smoothInterpolation = this.getInterpolation() === InterpolateSmooth,
					lastIndex = times.length - 1;
			var writeIndex = 1;

			for (var i = 1; i < lastIndex; ++i) {
				var keep = false;
				var time = times[i];
				var timeNext = times[i + 1]; // remove adjacent keyframes scheduled at the same time

				if (time !== timeNext && (i !== 1 || time !== times[0])) {
					if (!smoothInterpolation) {
						// remove unnecessary keyframes same as their neighbors
						var offset = i * stride,
								offsetP = offset - stride,
								offsetN = offset + stride;

						for (var j = 0; j !== stride; ++j) {
							var value = values[offset + j];

							if (value !== values[offsetP + j] || value !== values[offsetN + j]) {
								keep = true;
								break;
							}
						}
					} else {
						keep = true;
					}
				} // in-place compaction


				if (keep) {
					if (i !== writeIndex) {
						times[writeIndex] = times[i];
						var readOffset = i * stride,
								writeOffset = writeIndex * stride;

						for (var _j = 0; _j !== stride; ++_j) {
							values[writeOffset + _j] = values[readOffset + _j];
						}
					}

					++writeIndex;
				}
			} // flush last keyframe (compaction looks ahead)


			if (lastIndex > 0) {
				times[writeIndex] = times[lastIndex];

				for (var _readOffset = lastIndex * stride, _writeOffset = writeIndex * stride, _j2 = 0; _j2 !== stride; ++_j2) {
					values[_writeOffset + _j2] = values[_readOffset + _j2];
				}

				++writeIndex;
			}

			if (writeIndex !== times.length) {
				this.times = AnimationUtils.arraySlice(times, 0, writeIndex);
				this.values = AnimationUtils.arraySlice(values, 0, writeIndex * stride);
			} else {
				this.times = times;
				this.values = values;
			}

			return this;
		},
		clone: function clone() {
			var times = AnimationUtils.arraySlice(this.times, 0);
			var values = AnimationUtils.arraySlice(this.values, 0);
			var TypedKeyframeTrack = this.constructor;
			var track = new TypedKeyframeTrack(this.name, times, values); // Interpolant argument to constructor is not saved, so copy the factory method directly.

			track.createInterpolant = this.createInterpolant;
			return track;
		}
	});

	/**
	 * A Track of Boolean keyframe values.
	 */

	function BooleanKeyframeTrack(name, times, values) {
		KeyframeTrack.call(this, name, times, values);
	}

	BooleanKeyframeTrack.prototype = Object.assign(Object.create(KeyframeTrack.prototype), {
		constructor: BooleanKeyframeTrack,
		ValueTypeName: 'bool',
		ValueBufferType: Array,
		DefaultInterpolation: InterpolateDiscrete,
		InterpolantFactoryMethodLinear: undefined,
		InterpolantFactoryMethodSmooth: undefined // Note: Actually this track could have a optimized / compressed
		// representation of a single value and a custom interpolant that
		// computes "firstValue ^ isOdd( index )".

	});

	/**
	 * A Track of keyframe values that represent color.
	 */

	function ColorKeyframeTrack(name, times, values, interpolation) {
		KeyframeTrack.call(this, name, times, values, interpolation);
	}

	ColorKeyframeTrack.prototype = Object.assign(Object.create(KeyframeTrack.prototype), {
		constructor: ColorKeyframeTrack,
		ValueTypeName: 'color' // ValueBufferType is inherited
		// DefaultInterpolation is inherited
		// Note: Very basic implementation and nothing special yet.
		// However, this is the place for color space parameterization.

	});

	/**
	 * A Track of numeric keyframe values.
	 */

	function NumberKeyframeTrack(name, times, values, interpolation) {
		KeyframeTrack.call(this, name, times, values, interpolation);
	}

	NumberKeyframeTrack.prototype = Object.assign(Object.create(KeyframeTrack.prototype), {
		constructor: NumberKeyframeTrack,
		ValueTypeName: 'number' // ValueBufferType is inherited
		// DefaultInterpolation is inherited

	});

	/**
	 * Spherical linear unit quaternion interpolant.
	 */

	function QuaternionLinearInterpolant(parameterPositions, sampleValues, sampleSize, resultBuffer) {
		Interpolant.call(this, parameterPositions, sampleValues, sampleSize, resultBuffer);
	}

	QuaternionLinearInterpolant.prototype = Object.assign(Object.create(Interpolant.prototype), {
		constructor: QuaternionLinearInterpolant,
		interpolate_: function interpolate_(i1, t0, t, t1) {
			var result = this.resultBuffer,
					values = this.sampleValues,
					stride = this.valueSize,
					alpha = (t - t0) / (t1 - t0);
			var offset = i1 * stride;

			for (var end = offset + stride; offset !== end; offset += 4) {
				Quaternion.slerpFlat(result, 0, values, offset - stride, values, offset, alpha);
			}

			return result;
		}
	});

	/**
	 * A Track of quaternion keyframe values.
	 */

	function QuaternionKeyframeTrack(name, times, values, interpolation) {
		KeyframeTrack.call(this, name, times, values, interpolation);
	}

	QuaternionKeyframeTrack.prototype = Object.assign(Object.create(KeyframeTrack.prototype), {
		constructor: QuaternionKeyframeTrack,
		ValueTypeName: 'quaternion',
		// ValueBufferType is inherited
		DefaultInterpolation: InterpolateLinear,
		InterpolantFactoryMethodLinear: function InterpolantFactoryMethodLinear(result) {
			return new QuaternionLinearInterpolant(this.times, this.values, this.getValueSize(), result);
		},
		InterpolantFactoryMethodSmooth: undefined // not yet implemented

	});

	/**
	 * A Track that interpolates Strings
	 */

	function StringKeyframeTrack(name, times, values, interpolation) {
		KeyframeTrack.call(this, name, times, values, interpolation);
	}

	StringKeyframeTrack.prototype = Object.assign(Object.create(KeyframeTrack.prototype), {
		constructor: StringKeyframeTrack,
		ValueTypeName: 'string',
		ValueBufferType: Array,
		DefaultInterpolation: InterpolateDiscrete,
		InterpolantFactoryMethodLinear: undefined,
		InterpolantFactoryMethodSmooth: undefined
	});

	/**
	 * A Track of vectored keyframe values.
	 */

	function VectorKeyframeTrack(name, times, values, interpolation) {
		KeyframeTrack.call(this, name, times, values, interpolation);
	}

	VectorKeyframeTrack.prototype = Object.assign(Object.create(KeyframeTrack.prototype), {
		constructor: VectorKeyframeTrack,
		ValueTypeName: 'vector' // ValueBufferType is inherited
		// DefaultInterpolation is inherited

	});

	function AnimationClip(name, duration, tracks, blendMode) {
		if (duration === void 0) {
			duration = -1;
		}

		if (blendMode === void 0) {
			blendMode = NormalAnimationBlendMode;
		}

		this.name = name;
		this.tracks = tracks;
		this.duration = duration;
		this.blendMode = blendMode;
		this.uuid = MathUtils.generateUUID(); // this means it should figure out its duration by scanning the tracks

		if (this.duration < 0) {
			this.resetDuration();
		}
	}

	function getTrackTypeForValueTypeName(typeName) {
		switch (typeName.toLowerCase()) {
			case 'scalar':
			case 'double':
			case 'float':
			case 'number':
			case 'integer':
				return NumberKeyframeTrack;

			case 'vector':
			case 'vector2':
			case 'vector3':
			case 'vector4':
				return VectorKeyframeTrack;

			case 'color':
				return ColorKeyframeTrack;

			case 'quaternion':
				return QuaternionKeyframeTrack;

			case 'bool':
			case 'boolean':
				return BooleanKeyframeTrack;

			case 'string':
				return StringKeyframeTrack;
		}

		throw new Error('THREE.KeyframeTrack: Unsupported typeName: ' + typeName);
	}

	function parseKeyframeTrack(json) {
		if (json.type === undefined) {
			throw new Error('THREE.KeyframeTrack: track type undefined, can not parse');
		}

		var trackType = getTrackTypeForValueTypeName(json.type);

		if (json.times === undefined) {
			var times = [],
					values = [];
			AnimationUtils.flattenJSON(json.keys, times, values, 'value');
			json.times = times;
			json.values = values;
		} // derived classes can define a static parse method


		if (trackType.parse !== undefined) {
			return trackType.parse(json);
		} else {
			// by default, we assume a constructor compatible with the base
			return new trackType(json.name, json.times, json.values, json.interpolation);
		}
	}

	Object.assign(AnimationClip, {
		parse: function parse(json) {
			var tracks = [],
					jsonTracks = json.tracks,
					frameTime = 1.0 / (json.fps || 1.0);

			for (var i = 0, n = jsonTracks.length; i !== n; ++i) {
				tracks.push(parseKeyframeTrack(jsonTracks[i]).scale(frameTime));
			}

			var clip = new AnimationClip(json.name, json.duration, tracks, json.blendMode);
			clip.uuid = json.uuid;
			return clip;
		},
		toJSON: function toJSON(clip) {
			var tracks = [],
					clipTracks = clip.tracks;
			var json = {
				'name': clip.name,
				'duration': clip.duration,
				'tracks': tracks,
				'uuid': clip.uuid,
				'blendMode': clip.blendMode
			};

			for (var i = 0, n = clipTracks.length; i !== n; ++i) {
				tracks.push(KeyframeTrack.toJSON(clipTracks[i]));
			}

			return json;
		},
		CreateFromMorphTargetSequence: function CreateFromMorphTargetSequence(name, morphTargetSequence, fps, noLoop) {
			var numMorphTargets = morphTargetSequence.length;
			var tracks = [];

			for (var i = 0; i < numMorphTargets; i++) {
				var times = [];
				var values = [];
				times.push((i + numMorphTargets - 1) % numMorphTargets, i, (i + 1) % numMorphTargets);
				values.push(0, 1, 0);
				var order = AnimationUtils.getKeyframeOrder(times);
				times = AnimationUtils.sortedArray(times, 1, order);
				values = AnimationUtils.sortedArray(values, 1, order); // if there is a key at the first frame, duplicate it as the
				// last frame as well for perfect loop.

				if (!noLoop && times[0] === 0) {
					times.push(numMorphTargets);
					values.push(values[0]);
				}

				tracks.push(new NumberKeyframeTrack('.morphTargetInfluences[' + morphTargetSequence[i].name + ']', times, values).scale(1.0 / fps));
			}

			return new AnimationClip(name, -1, tracks);
		},
		findByName: function findByName(objectOrClipArray, name) {
			var clipArray = objectOrClipArray;

			if (!Array.isArray(objectOrClipArray)) {
				var o = objectOrClipArray;
				clipArray = o.geometry && o.geometry.animations || o.animations;
			}

			for (var i = 0; i < clipArray.length; i++) {
				if (clipArray[i].name === name) {
					return clipArray[i];
				}
			}

			return null;
		},
		CreateClipsFromMorphTargetSequences: function CreateClipsFromMorphTargetSequences(morphTargets, fps, noLoop) {
			var animationToMorphTargets = {}; // tested with https://regex101.com/ on trick sequences
			// such flamingo_flyA_003, flamingo_run1_003, crdeath0059

			var pattern = /^([\w-]*?)([\d]+)$/; // sort morph target names into animation groups based
			// patterns like Walk_001, Walk_002, Run_001, Run_002

			for (var i = 0, il = morphTargets.length; i < il; i++) {
				var morphTarget = morphTargets[i];
				var parts = morphTarget.name.match(pattern);

				if (parts && parts.length > 1) {
					var name = parts[1];
					var animationMorphTargets = animationToMorphTargets[name];

					if (!animationMorphTargets) {
						animationToMorphTargets[name] = animationMorphTargets = [];
					}

					animationMorphTargets.push(morphTarget);
				}
			}

			var clips = [];

			for (var _name in animationToMorphTargets) {
				clips.push(AnimationClip.CreateFromMorphTargetSequence(_name, animationToMorphTargets[_name], fps, noLoop));
			}

			return clips;
		},
		// parse the animation.hierarchy format
		parseAnimation: function parseAnimation(animation, bones) {
			if (!animation) {
				console.error('THREE.AnimationClip: No animation in JSONLoader data.');
				return null;
			}

			var addNonemptyTrack = function addNonemptyTrack(trackType, trackName, animationKeys, propertyName, destTracks) {
				// only return track if there are actually keys.
				if (animationKeys.length !== 0) {
					var times = [];
					var values = [];
					AnimationUtils.flattenJSON(animationKeys, times, values, propertyName); // empty keys are filtered out, so check again

					if (times.length !== 0) {
						destTracks.push(new trackType(trackName, times, values));
					}
				}
			};

			var tracks = [];
			var clipName = animation.name || 'default';
			var fps = animation.fps || 30;
			var blendMode = animation.blendMode; // automatic length determination in AnimationClip.

			var duration = animation.length || -1;
			var hierarchyTracks = animation.hierarchy || [];

			for (var h = 0; h < hierarchyTracks.length; h++) {
				var animationKeys = hierarchyTracks[h].keys; // skip empty tracks

				if (!animationKeys || animationKeys.length === 0) continue; // process morph targets

				if (animationKeys[0].morphTargets) {
					// figure out all morph targets used in this track
					var morphTargetNames = {};
					var k = void 0;

					for (k = 0; k < animationKeys.length; k++) {
						if (animationKeys[k].morphTargets) {
							for (var m = 0; m < animationKeys[k].morphTargets.length; m++) {
								morphTargetNames[animationKeys[k].morphTargets[m]] = -1;
							}
						}
					} // create a track for each morph target with all zero
					// morphTargetInfluences except for the keys in which
					// the morphTarget is named.


					for (var morphTargetName in morphTargetNames) {
						var times = [];
						var values = [];

						for (var _m = 0; _m !== animationKeys[k].morphTargets.length; ++_m) {
							var animationKey = animationKeys[k];
							times.push(animationKey.time);
							values.push(animationKey.morphTarget === morphTargetName ? 1 : 0);
						}

						tracks.push(new NumberKeyframeTrack('.morphTargetInfluence[' + morphTargetName + ']', times, values));
					}

					duration = morphTargetNames.length * (fps || 1.0);
				} else {
					// ...assume skeletal animation
					var boneName = '.bones[' + bones[h].name + ']';
					addNonemptyTrack(VectorKeyframeTrack, boneName + '.position', animationKeys, 'pos', tracks);
					addNonemptyTrack(QuaternionKeyframeTrack, boneName + '.quaternion', animationKeys, 'rot', tracks);
					addNonemptyTrack(VectorKeyframeTrack, boneName + '.scale', animationKeys, 'scl', tracks);
				}
			}

			if (tracks.length === 0) {
				return null;
			}

			var clip = new AnimationClip(clipName, duration, tracks, blendMode);
			return clip;
		}
	});
	Object.assign(AnimationClip.prototype, {
		resetDuration: function resetDuration() {
			var tracks = this.tracks;
			var duration = 0;

			for (var i = 0, n = tracks.length; i !== n; ++i) {
				var track = this.tracks[i];
				duration = Math.max(duration, track.times[track.times.length - 1]);
			}

			this.duration = duration;
			return this;
		},
		trim: function trim() {
			for (var i = 0; i < this.tracks.length; i++) {
				this.tracks[i].trim(0, this.duration);
			}

			return this;
		},
		validate: function validate() {
			var valid = true;

			for (var i = 0; i < this.tracks.length; i++) {
				valid = valid && this.tracks[i].validate();
			}

			return valid;
		},
		optimize: function optimize() {
			for (var i = 0; i < this.tracks.length; i++) {
				this.tracks[i].optimize();
			}

			return this;
		},
		clone: function clone() {
			var tracks = [];

			for (var i = 0; i < this.tracks.length; i++) {
				tracks.push(this.tracks[i].clone());
			}

			return new AnimationClip(this.name, this.duration, tracks, this.blendMode);
		},
		toJSON: function toJSON() {
			return AnimationClip.toJSON(this);
		}
	});

	var Cache = {
		enabled: false,
		files: {},
		add: function add(key, file) {
			if (this.enabled === false) return; // console.log( 'THREE.Cache', 'Adding key:', key );

			this.files[key] = file;
		},
		get: function get(key) {
			if (this.enabled === false) return; // console.log( 'THREE.Cache', 'Checking key:', key );

			return this.files[key];
		},
		remove: function remove(key) {
			delete this.files[key];
		},
		clear: function clear() {
			this.files = {};
		}
	};

	function LoadingManager(onLoad, onProgress, onError) {
		var scope = this;
		var isLoading = false;
		var itemsLoaded = 0;
		var itemsTotal = 0;
		var urlModifier = undefined;
		var handlers = []; // Refer to #5689 for the reason why we don't set .onStart
		// in the constructor

		this.onStart = undefined;
		this.onLoad = onLoad;
		this.onProgress = onProgress;
		this.onError = onError;

		this.itemStart = function (url) {
			itemsTotal++;

			if (isLoading === false) {
				if (scope.onStart !== undefined) {
					scope.onStart(url, itemsLoaded, itemsTotal);
				}
			}

			isLoading = true;
		};

		this.itemEnd = function (url) {
			itemsLoaded++;

			if (scope.onProgress !== undefined) {
				scope.onProgress(url, itemsLoaded, itemsTotal);
			}

			if (itemsLoaded === itemsTotal) {
				isLoading = false;

				if (scope.onLoad !== undefined) {
					scope.onLoad();
				}
			}
		};

		this.itemError = function (url) {
			if (scope.onError !== undefined) {
				scope.onError(url);
			}
		};

		this.resolveURL = function (url) {
			if (urlModifier) {
				return urlModifier(url);
			}

			return url;
		};

		this.setURLModifier = function (transform) {
			urlModifier = transform;
			return this;
		};

		this.addHandler = function (regex, loader) {
			handlers.push(regex, loader);
			return this;
		};

		this.removeHandler = function (regex) {
			var index = handlers.indexOf(regex);

			if (index !== -1) {
				handlers.splice(index, 2);
			}

			return this;
		};

		this.getHandler = function (file) {
			for (var i = 0, l = handlers.length; i < l; i += 2) {
				var regex = handlers[i];
				var loader = handlers[i + 1];
				if (regex.global) regex.lastIndex = 0; // see #17920

				if (regex.test(file)) {
					return loader;
				}
			}

			return null;
		};
	}

	var DefaultLoadingManager = new LoadingManager();

	function Loader(manager) {
		this.manager = manager !== undefined ? manager : DefaultLoadingManager;
		this.crossOrigin = 'anonymous';
		this.withCredentials = false;
		this.path = '';
		this.resourcePath = '';
		this.requestHeader = {};
	}

	Object.assign(Loader.prototype, {
		load: function load()
		/* url, onLoad, onProgress, onError */
		{},
		loadAsync: function loadAsync(url, onProgress) {
			var scope = this;
			return new Promise(function (resolve, reject) {
				scope.load(url, resolve, onProgress, reject);
			});
		},
		parse: function parse()
		/* data */
		{},
		setCrossOrigin: function setCrossOrigin(crossOrigin) {
			this.crossOrigin = crossOrigin;
			return this;
		},
		setWithCredentials: function setWithCredentials(value) {
			this.withCredentials = value;
			return this;
		},
		setPath: function setPath(path) {
			this.path = path;
			return this;
		},
		setResourcePath: function setResourcePath(resourcePath) {
			this.resourcePath = resourcePath;
			return this;
		},
		setRequestHeader: function setRequestHeader(requestHeader) {
			this.requestHeader = requestHeader;
			return this;
		}
	});

	var loading = {};

	function FileLoader(manager) {
		Loader.call(this, manager);
	}

	FileLoader.prototype = Object.assign(Object.create(Loader.prototype), {
		constructor: FileLoader,
		load: function load(url, onLoad, onProgress, onError) {
			if (url === undefined) url = '';
			if (this.path !== undefined) url = this.path + url;
			url = this.manager.resolveURL(url);
			var scope = this;
			var cached = Cache.get(url);

			if (cached !== undefined) {
				scope.manager.itemStart(url);
				setTimeout(function () {
					if (onLoad) onLoad(cached);
					scope.manager.itemEnd(url);
				}, 0);
				return cached;
			} // Check if request is duplicate


			if (loading[url] !== undefined) {
				loading[url].push({
					onLoad: onLoad,
					onProgress: onProgress,
					onError: onError
				});
				return;
			} // Check for data: URI


			var dataUriRegex = /^data:(.*?)(;base64)?,(.*)$/;
			var dataUriRegexResult = url.match(dataUriRegex);
			var request; // Safari can not handle Data URIs through XMLHttpRequest so process manually

			if (dataUriRegexResult) {
				var mimeType = dataUriRegexResult[1];
				var isBase64 = !!dataUriRegexResult[2];
				var data = dataUriRegexResult[3];
				data = decodeURIComponent(data);
				if (isBase64) data = atob(data);

				try {
					var response;
					var responseType = (this.responseType || '').toLowerCase();

					switch (responseType) {
						case 'arraybuffer':
						case 'blob':
							var view = new Uint8Array(data.length);

							for (var i = 0; i < data.length; i++) {
								view[i] = data.charCodeAt(i);
							}

							if (responseType === 'blob') {
								response = new Blob([view.buffer], {
									type: mimeType
								});
							} else {
								response = view.buffer;
							}

							break;

						case 'document':
							var parser = new DOMParser();
							response = parser.parseFromString(data, mimeType);
							break;

						case 'json':
							response = JSON.parse(data);
							break;

						default:
							// 'text' or other
							response = data;
							break;
					} // Wait for next browser tick like standard XMLHttpRequest event dispatching does


					setTimeout(function () {
						if (onLoad) onLoad(response);
						scope.manager.itemEnd(url);
					}, 0);
				} catch (error) {
					// Wait for next browser tick like standard XMLHttpRequest event dispatching does
					setTimeout(function () {
						if (onError) onError(error);
						scope.manager.itemError(url);
						scope.manager.itemEnd(url);
					}, 0);
				}
			} else {
				// Initialise array for duplicate requests
				loading[url] = [];
				loading[url].push({
					onLoad: onLoad,
					onProgress: onProgress,
					onError: onError
				});
				request = new XMLHttpRequest();
				request.open('GET', url, true);
				request.addEventListener('load', function (event) {
					var response = this.response;
					var callbacks = loading[url];
					delete loading[url];

					if (this.status === 200 || this.status === 0) {
						// Some browsers return HTTP Status 0 when using non-http protocol
						// e.g. 'file://' or 'data://'. Handle as success.
						if (this.status === 0) console.warn('THREE.FileLoader: HTTP Status 0 received.'); // Add to cache only on HTTP success, so that we do not cache
						// error response bodies as proper responses to requests.

						Cache.add(url, response);

						for (var _i = 0, il = callbacks.length; _i < il; _i++) {
							var callback = callbacks[_i];
							if (callback.onLoad) callback.onLoad(response);
						}

						scope.manager.itemEnd(url);
					} else {
						for (var _i2 = 0, _il = callbacks.length; _i2 < _il; _i2++) {
							var _callback = callbacks[_i2];
							if (_callback.onError) _callback.onError(event);
						}

						scope.manager.itemError(url);
						scope.manager.itemEnd(url);
					}
				}, false);
				request.addEventListener('progress', function (event) {
					var callbacks = loading[url];

					for (var _i3 = 0, il = callbacks.length; _i3 < il; _i3++) {
						var callback = callbacks[_i3];
						if (callback.onProgress) callback.onProgress(event);
					}
				}, false);
				request.addEventListener('error', function (event) {
					var callbacks = loading[url];
					delete loading[url];

					for (var _i4 = 0, il = callbacks.length; _i4 < il; _i4++) {
						var callback = callbacks[_i4];
						if (callback.onError) callback.onError(event);
					}

					scope.manager.itemError(url);
					scope.manager.itemEnd(url);
				}, false);
				request.addEventListener('abort', function (event) {
					var callbacks = loading[url];
					delete loading[url];

					for (var _i5 = 0, il = callbacks.length; _i5 < il; _i5++) {
						var callback = callbacks[_i5];
						if (callback.onError) callback.onError(event);
					}

					scope.manager.itemError(url);
					scope.manager.itemEnd(url);
				}, false);
				if (this.responseType !== undefined) request.responseType = this.responseType;
				if (this.withCredentials !== undefined) request.withCredentials = this.withCredentials;
				if (request.overrideMimeType) request.overrideMimeType(this.mimeType !== undefined ? this.mimeType : 'text/plain');

				for (var header in this.requestHeader) {
					request.setRequestHeader(header, this.requestHeader[header]);
				}

				request.send(null);
			}

			scope.manager.itemStart(url);
			return request;
		},
		setResponseType: function setResponseType(value) {
			this.responseType = value;
			return this;
		},
		setMimeType: function setMimeType(value) {
			this.mimeType = value;
			return this;
		}
	});

	function AnimationLoader(manager) {
		Loader.call(this, manager);
	}

	AnimationLoader.prototype = Object.assign(Object.create(Loader.prototype), {
		constructor: AnimationLoader,
		load: function load(url, onLoad, onProgress, onError) {
			var scope = this;
			var loader = new FileLoader(scope.manager);
			loader.setPath(scope.path);
			loader.setRequestHeader(scope.requestHeader);
			loader.setWithCredentials(scope.withCredentials);
			loader.load(url, function (text) {
				try {
					onLoad(scope.parse(JSON.parse(text)));
				} catch (e) {
					if (onError) {
						onError(e);
					} else {
						console.error(e);
					}

					scope.manager.itemError(url);
				}
			}, onProgress, onError);
		},
		parse: function parse(json) {
			var animations = [];

			for (var i = 0; i < json.length; i++) {
				var clip = AnimationClip.parse(json[i]);
				animations.push(clip);
			}

			return animations;
		}
	});

	/**
	 * Abstract Base class to block based textures loader (dds, pvr, ...)
	 *
	 * Sub classes have to implement the parse() method which will be used in load().
	 */

	function CompressedTextureLoader(manager) {
		Loader.call(this, manager);
	}

	CompressedTextureLoader.prototype = Object.assign(Object.create(Loader.prototype), {
		constructor: CompressedTextureLoader,
		load: function load(url, onLoad, onProgress, onError) {
			var scope = this;
			var images = [];
			var texture = new CompressedTexture();
			var loader = new FileLoader(this.manager);
			loader.setPath(this.path);
			loader.setResponseType('arraybuffer');
			loader.setRequestHeader(this.requestHeader);
			loader.setWithCredentials(scope.withCredentials);
			var loaded = 0;

			function loadTexture(i) {
				loader.load(url[i], function (buffer) {
					var texDatas = scope.parse(buffer, true);
					images[i] = {
						width: texDatas.width,
						height: texDatas.height,
						format: texDatas.format,
						mipmaps: texDatas.mipmaps
					};
					loaded += 1;

					if (loaded === 6) {
						if (texDatas.mipmapCount === 1) texture.minFilter = LinearFilter;
						texture.image = images;
						texture.format = texDatas.format;
						texture.needsUpdate = true;
						if (onLoad) onLoad(texture);
					}
				}, onProgress, onError);
			}

			if (Array.isArray(url)) {
				for (var i = 0, il = url.length; i < il; ++i) {
					loadTexture(i);
				}
			} else {
				// compressed cubemap texture stored in a single DDS file
				loader.load(url, function (buffer) {
					var texDatas = scope.parse(buffer, true);

					if (texDatas.isCubemap) {
						var faces = texDatas.mipmaps.length / texDatas.mipmapCount;

						for (var f = 0; f < faces; f++) {
							images[f] = {
								mipmaps: []
							};

							for (var _i = 0; _i < texDatas.mipmapCount; _i++) {
								images[f].mipmaps.push(texDatas.mipmaps[f * texDatas.mipmapCount + _i]);
								images[f].format = texDatas.format;
								images[f].width = texDatas.width;
								images[f].height = texDatas.height;
							}
						}

						texture.image = images;
					} else {
						texture.image.width = texDatas.width;
						texture.image.height = texDatas.height;
						texture.mipmaps = texDatas.mipmaps;
					}

					if (texDatas.mipmapCount === 1) {
						texture.minFilter = LinearFilter;
					}

					texture.format = texDatas.format;
					texture.needsUpdate = true;
					if (onLoad) onLoad(texture);
				}, onProgress, onError);
			}

			return texture;
		}
	});

	function ImageLoader(manager) {
		Loader.call(this, manager);
	}

	ImageLoader.prototype = Object.assign(Object.create(Loader.prototype), {
		constructor: ImageLoader,
		load: function load(url, onLoad, onProgress, onError) {
			if (this.path !== undefined) url = this.path + url;
			url = this.manager.resolveURL(url);
			var scope = this;
			var cached = Cache.get(url);

			if (cached !== undefined) {
				scope.manager.itemStart(url);
				setTimeout(function () {
					if (onLoad) onLoad(cached);
					scope.manager.itemEnd(url);
				}, 0);
				return cached;
			}

			var image = document.createElementNS('http://www.w3.org/1999/xhtml', 'img');

			function onImageLoad() {
				image.removeEventListener('load', onImageLoad, false);
				image.removeEventListener('error', onImageError, false);
				Cache.add(url, this);
				if (onLoad) onLoad(this);
				scope.manager.itemEnd(url);
			}

			function onImageError(event) {
				image.removeEventListener('load', onImageLoad, false);
				image.removeEventListener('error', onImageError, false);
				if (onError) onError(event);
				scope.manager.itemError(url);
				scope.manager.itemEnd(url);
			}

			image.addEventListener('load', onImageLoad, false);
			image.addEventListener('error', onImageError, false);

			if (url.substr(0, 5) !== 'data:') {
				if (this.crossOrigin !== undefined) image.crossOrigin = this.crossOrigin;
			}

			scope.manager.itemStart(url);
			image.src = url;
			return image;
		}
	});

	function CubeTextureLoader(manager) {
		Loader.call(this, manager);
	}

	CubeTextureLoader.prototype = Object.assign(Object.create(Loader.prototype), {
		constructor: CubeTextureLoader,
		load: function load(urls, onLoad, onProgress, onError) {
			var texture = new CubeTexture();
			var loader = new ImageLoader(this.manager);
			loader.setCrossOrigin(this.crossOrigin);
			loader.setPath(this.path);
			var loaded = 0;

			function loadTexture(i) {
				loader.load(urls[i], function (image) {
					texture.images[i] = image;
					loaded++;

					if (loaded === 6) {
						texture.needsUpdate = true;
						if (onLoad) onLoad(texture);
					}
				}, undefined, onError);
			}

			for (var i = 0; i < urls.length; ++i) {
				loadTexture(i);
			}

			return texture;
		}
	});

	/**
	 * Abstract Base class to load generic binary textures formats (rgbe, hdr, ...)
	 *
	 * Sub classes have to implement the parse() method which will be used in load().
	 */

	function DataTextureLoader(manager) {
		Loader.call(this, manager);
	}

	DataTextureLoader.prototype = Object.assign(Object.create(Loader.prototype), {
		constructor: DataTextureLoader,
		load: function load(url, onLoad, onProgress, onError) {
			var scope = this;
			var texture = new DataTexture();
			var loader = new FileLoader(this.manager);
			loader.setResponseType('arraybuffer');
			loader.setRequestHeader(this.requestHeader);
			loader.setPath(this.path);
			loader.setWithCredentials(scope.withCredentials);
			loader.load(url, function (buffer) {
				var texData = scope.parse(buffer);
				if (!texData) return;

				if (texData.image !== undefined) {
					texture.image = texData.image;
				} else if (texData.data !== undefined) {
					texture.image.width = texData.width;
					texture.image.height = texData.height;
					texture.image.data = texData.data;
				}

				texture.wrapS = texData.wrapS !== undefined ? texData.wrapS : ClampToEdgeWrapping;
				texture.wrapT = texData.wrapT !== undefined ? texData.wrapT : ClampToEdgeWrapping;
				texture.magFilter = texData.magFilter !== undefined ? texData.magFilter : LinearFilter;
				texture.minFilter = texData.minFilter !== undefined ? texData.minFilter : LinearFilter;
				texture.anisotropy = texData.anisotropy !== undefined ? texData.anisotropy : 1;

				if (texData.encoding !== undefined) {
					texture.encoding = texData.encoding;
				}

				if (texData.flipY !== undefined) {
					texture.flipY = texData.flipY;
				}

				if (texData.format !== undefined) {
					texture.format = texData.format;
				}

				if (texData.type !== undefined) {
					texture.type = texData.type;
				}

				if (texData.mipmaps !== undefined) {
					texture.mipmaps = texData.mipmaps;
					texture.minFilter = LinearMipmapLinearFilter; // presumably...
				}

				if (texData.mipmapCount === 1) {
					texture.minFilter = LinearFilter;
				}

				texture.needsUpdate = true;
				if (onLoad) onLoad(texture, texData);
			}, onProgress, onError);
			return texture;
		}
	});

	function TextureLoader(manager) {
		Loader.call(this, manager);
	}

	TextureLoader.prototype = Object.assign(Object.create(Loader.prototype), {
		constructor: TextureLoader,
		load: function load(url, onLoad, onProgress, onError) {
			var texture = new Texture();
			var loader = new ImageLoader(this.manager);
			loader.setCrossOrigin(this.crossOrigin);
			loader.setPath(this.path);
			loader.load(url, function (image) {
				texture.image = image; // JPEGs can't have an alpha channel, so memory can be saved by storing them as RGB.

				var isJPEG = url.search(/\.jpe?g($|\?)/i) > 0 || url.search(/^data\:image\/jpeg/) === 0;
				texture.format = isJPEG ? RGBFormat : RGBAFormat;
				texture.needsUpdate = true;

				if (onLoad !== undefined) {
					onLoad(texture);
				}
			}, onProgress, onError);
			return texture;
		}
	});

	/**
	 * Extensible curve object.
	 *
	 * Some common of curve methods:
	 * .getPoint( t, optionalTarget ), .getTangent( t, optionalTarget )
	 * .getPointAt( u, optionalTarget ), .getTangentAt( u, optionalTarget )
	 * .getPoints(), .getSpacedPoints()
	 * .getLength()
	 * .updateArcLengths()
	 *
	 * This following curves inherit from THREE.Curve:
	 *
	 * -- 2D curves --
	 * THREE.ArcCurve
	 * THREE.CubicBezierCurve
	 * THREE.EllipseCurve
	 * THREE.LineCurve
	 * THREE.QuadraticBezierCurve
	 * THREE.SplineCurve
	 *
	 * -- 3D curves --
	 * THREE.CatmullRomCurve3
	 * THREE.CubicBezierCurve3
	 * THREE.LineCurve3
	 * THREE.QuadraticBezierCurve3
	 *
	 * A series of curves can be represented as a THREE.CurvePath.
	 *
	 **/

	function Curve() {
		this.type = 'Curve';
		this.arcLengthDivisions = 200;
	}

	Object.assign(Curve.prototype, {
		// Virtual base class method to overwrite and implement in subclasses
		//	- t [0 .. 1]
		getPoint: function getPoint()
		/* t, optionalTarget */
		{
			console.warn('THREE.Curve: .getPoint() not implemented.');
			return null;
		},
		// Get point at relative position in curve according to arc length
		// - u [0 .. 1]
		getPointAt: function getPointAt(u, optionalTarget) {
			var t = this.getUtoTmapping(u);
			return this.getPoint(t, optionalTarget);
		},
		// Get sequence of points using getPoint( t )
		getPoints: function getPoints(divisions) {
			if (divisions === void 0) {
				divisions = 5;
			}

			var points = [];

			for (var d = 0; d <= divisions; d++) {
				points.push(this.getPoint(d / divisions));
			}

			return points;
		},
		// Get sequence of points using getPointAt( u )
		getSpacedPoints: function getSpacedPoints(divisions) {
			if (divisions === void 0) {
				divisions = 5;
			}

			var points = [];

			for (var d = 0; d <= divisions; d++) {
				points.push(this.getPointAt(d / divisions));
			}

			return points;
		},
		// Get total curve arc length
		getLength: function getLength() {
			var lengths = this.getLengths();
			return lengths[lengths.length - 1];
		},
		// Get list of cumulative segment lengths
		getLengths: function getLengths(divisions) {
			if (divisions === undefined) divisions = this.arcLengthDivisions;

			if (this.cacheArcLengths && this.cacheArcLengths.length === divisions + 1 && !this.needsUpdate) {
				return this.cacheArcLengths;
			}

			this.needsUpdate = false;
			var cache = [];
			var current,
					last = this.getPoint(0);
			var sum = 0;
			cache.push(0);

			for (var p = 1; p <= divisions; p++) {
				current = this.getPoint(p / divisions);
				sum += current.distanceTo(last);
				cache.push(sum);
				last = current;
			}

			this.cacheArcLengths = cache;
			return cache; // { sums: cache, sum: sum }; Sum is in the last element.
		},
		updateArcLengths: function updateArcLengths() {
			this.needsUpdate = true;
			this.getLengths();
		},
		// Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equidistant
		getUtoTmapping: function getUtoTmapping(u, distance) {
			var arcLengths = this.getLengths();
			var i = 0;
			var il = arcLengths.length;
			var targetArcLength; // The targeted u distance value to get

			if (distance) {
				targetArcLength = distance;
			} else {
				targetArcLength = u * arcLengths[il - 1];
			} // binary search for the index with largest value smaller than target u distance


			var low = 0,
					high = il - 1,
					comparison;

			while (low <= high) {
				i = Math.floor(low + (high - low) / 2); // less likely to overflow, though probably not issue here, JS doesn't really have integers, all numbers are floats

				comparison = arcLengths[i] - targetArcLength;

				if (comparison < 0) {
					low = i + 1;
				} else if (comparison > 0) {
					high = i - 1;
				} else {
					high = i;
					break; // DONE
				}
			}

			i = high;

			if (arcLengths[i] === targetArcLength) {
				return i / (il - 1);
			} // we could get finer grain at lengths, or use simple interpolation between two points


			var lengthBefore = arcLengths[i];
			var lengthAfter = arcLengths[i + 1];
			var segmentLength = lengthAfter - lengthBefore; // determine where we are between the 'before' and 'after' points

			var segmentFraction = (targetArcLength - lengthBefore) / segmentLength; // add that fractional amount to t

			var t = (i + segmentFraction) / (il - 1);
			return t;
		},
		// Returns a unit vector tangent at t
		// In case any sub curve does not implement its tangent derivation,
		// 2 points a small delta apart will be used to find its gradient
		// which seems to give a reasonable approximation
		getTangent: function getTangent(t, optionalTarget) {
			var delta = 0.0001;
			var t1 = t - delta;
			var t2 = t + delta; // Capping in case of danger

			if (t1 < 0) t1 = 0;
			if (t2 > 1) t2 = 1;
			var pt1 = this.getPoint(t1);
			var pt2 = this.getPoint(t2);
			var tangent = optionalTarget || (pt1.isVector2 ? new Vector2() : new Vector3());
			tangent.copy(pt2).sub(pt1).normalize();
			return tangent;
		},
		getTangentAt: function getTangentAt(u, optionalTarget) {
			var t = this.getUtoTmapping(u);
			return this.getTangent(t, optionalTarget);
		},
		computeFrenetFrames: function computeFrenetFrames(segments, closed) {
			// see http://www.cs.indiana.edu/pub/techreports/TR425.pdf
			var normal = new Vector3();
			var tangents = [];
			var normals = [];
			var binormals = [];
			var vec = new Vector3();
			var mat = new Matrix4(); // compute the tangent vectors for each segment on the curve

			for (var i = 0; i <= segments; i++) {
				var u = i / segments;
				tangents[i] = this.getTangentAt(u, new Vector3());
				tangents[i].normalize();
			} // select an initial normal vector perpendicular to the first tangent vector,
			// and in the direction of the minimum tangent xyz component


			normals[0] = new Vector3();
			binormals[0] = new Vector3();
			var min = Number.MAX_VALUE;
			var tx = Math.abs(tangents[0].x);
			var ty = Math.abs(tangents[0].y);
			var tz = Math.abs(tangents[0].z);

			if (tx <= min) {
				min = tx;
				normal.set(1, 0, 0);
			}

			if (ty <= min) {
				min = ty;
				normal.set(0, 1, 0);
			}

			if (tz <= min) {
				normal.set(0, 0, 1);
			}

			vec.crossVectors(tangents[0], normal).normalize();
			normals[0].crossVectors(tangents[0], vec);
			binormals[0].crossVectors(tangents[0], normals[0]); // compute the slowly-varying normal and binormal vectors for each segment on the curve

			for (var _i = 1; _i <= segments; _i++) {
				normals[_i] = normals[_i - 1].clone();
				binormals[_i] = binormals[_i - 1].clone();
				vec.crossVectors(tangents[_i - 1], tangents[_i]);

				if (vec.length() > Number.EPSILON) {
					vec.normalize();
					var theta = Math.acos(MathUtils.clamp(tangents[_i - 1].dot(tangents[_i]), -1, 1)); // clamp for floating pt errors

					normals[_i].applyMatrix4(mat.makeRotationAxis(vec, theta));
				}

				binormals[_i].crossVectors(tangents[_i], normals[_i]);
			} // if the curve is closed, postprocess the vectors so the first and last normal vectors are the same


			if (closed === true) {
				var _theta = Math.acos(MathUtils.clamp(normals[0].dot(normals[segments]), -1, 1));

				_theta /= segments;

				if (tangents[0].dot(vec.crossVectors(normals[0], normals[segments])) > 0) {
					_theta = -_theta;
				}

				for (var _i2 = 1; _i2 <= segments; _i2++) {
					// twist a little...
					normals[_i2].applyMatrix4(mat.makeRotationAxis(tangents[_i2], _theta * _i2));

					binormals[_i2].crossVectors(tangents[_i2], normals[_i2]);
				}
			}

			return {
				tangents: tangents,
				normals: normals,
				binormals: binormals
			};
		},
		clone: function clone() {
			return new this.constructor().copy(this);
		},
		copy: function copy(source) {
			this.arcLengthDivisions = source.arcLengthDivisions;
			return this;
		},
		toJSON: function toJSON() {
			var data = {
				metadata: {
					version: 4.5,
					type: 'Curve',
					generator: 'Curve.toJSON'
				}
			};
			data.arcLengthDivisions = this.arcLengthDivisions;
			data.type = this.type;
			return data;
		},
		fromJSON: function fromJSON(json) {
			this.arcLengthDivisions = json.arcLengthDivisions;
			return this;
		}
	});

	function EllipseCurve(aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation) {
		Curve.call(this);
		this.type = 'EllipseCurve';
		this.aX = aX || 0;
		this.aY = aY || 0;
		this.xRadius = xRadius || 1;
		this.yRadius = yRadius || 1;
		this.aStartAngle = aStartAngle || 0;
		this.aEndAngle = aEndAngle || 2 * Math.PI;
		this.aClockwise = aClockwise || false;
		this.aRotation = aRotation || 0;
	}

	EllipseCurve.prototype = Object.create(Curve.prototype);
	EllipseCurve.prototype.constructor = EllipseCurve;
	EllipseCurve.prototype.isEllipseCurve = true;

	EllipseCurve.prototype.getPoint = function (t, optionalTarget) {
		var point = optionalTarget || new Vector2();
		var twoPi = Math.PI * 2;
		var deltaAngle = this.aEndAngle - this.aStartAngle;
		var samePoints = Math.abs(deltaAngle) < Number.EPSILON; // ensures that deltaAngle is 0 .. 2 PI

		while (deltaAngle < 0) {
			deltaAngle += twoPi;
		}

		while (deltaAngle > twoPi) {
			deltaAngle -= twoPi;
		}

		if (deltaAngle < Number.EPSILON) {
			if (samePoints) {
				deltaAngle = 0;
			} else {
				deltaAngle = twoPi;
			}
		}

		if (this.aClockwise === true && !samePoints) {
			if (deltaAngle === twoPi) {
				deltaAngle = -twoPi;
			} else {
				deltaAngle = deltaAngle - twoPi;
			}
		}

		var angle = this.aStartAngle + t * deltaAngle;
		var x = this.aX + this.xRadius * Math.cos(angle);
		var y = this.aY + this.yRadius * Math.sin(angle);

		if (this.aRotation !== 0) {
			var cos = Math.cos(this.aRotation);
			var sin = Math.sin(this.aRotation);
			var tx = x - this.aX;
			var ty = y - this.aY; // Rotate the point about the center of the ellipse.

			x = tx * cos - ty * sin + this.aX;
			y = tx * sin + ty * cos + this.aY;
		}

		return point.set(x, y);
	};

	EllipseCurve.prototype.copy = function (source) {
		Curve.prototype.copy.call(this, source);
		this.aX = source.aX;
		this.aY = source.aY;
		this.xRadius = source.xRadius;
		this.yRadius = source.yRadius;
		this.aStartAngle = source.aStartAngle;
		this.aEndAngle = source.aEndAngle;
		this.aClockwise = source.aClockwise;
		this.aRotation = source.aRotation;
		return this;
	};

	EllipseCurve.prototype.toJSON = function () {
		var data = Curve.prototype.toJSON.call(this);
		data.aX = this.aX;
		data.aY = this.aY;
		data.xRadius = this.xRadius;
		data.yRadius = this.yRadius;
		data.aStartAngle = this.aStartAngle;
		data.aEndAngle = this.aEndAngle;
		data.aClockwise = this.aClockwise;
		data.aRotation = this.aRotation;
		return data;
	};

	EllipseCurve.prototype.fromJSON = function (json) {
		Curve.prototype.fromJSON.call(this, json);
		this.aX = json.aX;
		this.aY = json.aY;
		this.xRadius = json.xRadius;
		this.yRadius = json.yRadius;
		this.aStartAngle = json.aStartAngle;
		this.aEndAngle = json.aEndAngle;
		this.aClockwise = json.aClockwise;
		this.aRotation = json.aRotation;
		return this;
	};

	function ArcCurve(aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise) {
		EllipseCurve.call(this, aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise);
		this.type = 'ArcCurve';
	}

	ArcCurve.prototype = Object.create(EllipseCurve.prototype);
	ArcCurve.prototype.constructor = ArcCurve;
	ArcCurve.prototype.isArcCurve = true;

	/**
	 * Centripetal CatmullRom Curve - which is useful for avoiding
	 * cusps and self-intersections in non-uniform catmull rom curves.
	 * http://www.cemyuksel.com/research/catmullrom_param/catmullrom.pdf
	 *
	 * curve.type accepts centripetal(default), chordal and catmullrom
	 * curve.tension is used for catmullrom which defaults to 0.5
	 */

	/*
	Based on an optimized c++ solution in
	 - http://stackoverflow.com/questions/9489736/catmull-rom-curve-with-no-cusps-and-no-self-intersections/
	 - http://ideone.com/NoEbVM

	This CubicPoly class could be used for reusing some variables and calculations,
	but for three.js curve use, it could be possible inlined and flatten into a single function call
	which can be placed in CurveUtils.
	*/

	function CubicPoly() {
		var c0 = 0,
				c1 = 0,
				c2 = 0,
				c3 = 0;
		/*
		 * Compute coefficients for a cubic polynomial
		 *	 p(s) = c0 + c1*s + c2*s^2 + c3*s^3
		 * such that
		 *	 p(0) = x0, p(1) = x1
		 *	and
		 *	 p'(0) = t0, p'(1) = t1.
		 */

		function init(x0, x1, t0, t1) {
			c0 = x0;
			c1 = t0;
			c2 = -3 * x0 + 3 * x1 - 2 * t0 - t1;
			c3 = 2 * x0 - 2 * x1 + t0 + t1;
		}

		return {
			initCatmullRom: function initCatmullRom(x0, x1, x2, x3, tension) {
				init(x1, x2, tension * (x2 - x0), tension * (x3 - x1));
			},
			initNonuniformCatmullRom: function initNonuniformCatmullRom(x0, x1, x2, x3, dt0, dt1, dt2) {
				// compute tangents when parameterized in [t1,t2]
				var t1 = (x1 - x0) / dt0 - (x2 - x0) / (dt0 + dt1) + (x2 - x1) / dt1;
				var t2 = (x2 - x1) / dt1 - (x3 - x1) / (dt1 + dt2) + (x3 - x2) / dt2; // rescale tangents for parametrization in [0,1]

				t1 *= dt1;
				t2 *= dt1;
				init(x1, x2, t1, t2);
			},
			calc: function calc(t) {
				var t2 = t * t;
				var t3 = t2 * t;
				return c0 + c1 * t + c2 * t2 + c3 * t3;
			}
		};
	} //


	var tmp = new Vector3();
	var px = new CubicPoly(),
			py = new CubicPoly(),
			pz = new CubicPoly();

	function CatmullRomCurve3(points, closed, curveType, tension) {
		if (points === void 0) {
			points = [];
		}

		if (closed === void 0) {
			closed = false;
		}

		if (curveType === void 0) {
			curveType = 'centripetal';
		}

		if (tension === void 0) {
			tension = 0.5;
		}

		Curve.call(this);
		this.type = 'CatmullRomCurve3';
		this.points = points;
		this.closed = closed;
		this.curveType = curveType;
		this.tension = tension;
	}

	CatmullRomCurve3.prototype = Object.create(Curve.prototype);
	CatmullRomCurve3.prototype.constructor = CatmullRomCurve3;
	CatmullRomCurve3.prototype.isCatmullRomCurve3 = true;

	CatmullRomCurve3.prototype.getPoint = function (t, optionalTarget) {
		if (optionalTarget === void 0) {
			optionalTarget = new Vector3();
		}

		var point = optionalTarget;
		var points = this.points;
		var l = points.length;
		var p = (l - (this.closed ? 0 : 1)) * t;
		var intPoint = Math.floor(p);
		var weight = p - intPoint;

		if (this.closed) {
			intPoint += intPoint > 0 ? 0 : (Math.floor(Math.abs(intPoint) / l) + 1) * l;
		} else if (weight === 0 && intPoint === l - 1) {
			intPoint = l - 2;
			weight = 1;
		}

		var p0, p3; // 4 points (p1 & p2 defined below)

		if (this.closed || intPoint > 0) {
			p0 = points[(intPoint - 1) % l];
		} else {
			// extrapolate first point
			tmp.subVectors(points[0], points[1]).add(points[0]);
			p0 = tmp;
		}

		var p1 = points[intPoint % l];
		var p2 = points[(intPoint + 1) % l];

		if (this.closed || intPoint + 2 < l) {
			p3 = points[(intPoint + 2) % l];
		} else {
			// extrapolate last point
			tmp.subVectors(points[l - 1], points[l - 2]).add(points[l - 1]);
			p3 = tmp;
		}

		if (this.curveType === 'centripetal' || this.curveType === 'chordal') {
			// init Centripetal / Chordal Catmull-Rom
			var pow = this.curveType === 'chordal' ? 0.5 : 0.25;
			var dt0 = Math.pow(p0.distanceToSquared(p1), pow);
			var dt1 = Math.pow(p1.distanceToSquared(p2), pow);
			var dt2 = Math.pow(p2.distanceToSquared(p3), pow); // safety check for repeated points

			if (dt1 < 1e-4) dt1 = 1.0;
			if (dt0 < 1e-4) dt0 = dt1;
			if (dt2 < 1e-4) dt2 = dt1;
			px.initNonuniformCatmullRom(p0.x, p1.x, p2.x, p3.x, dt0, dt1, dt2);
			py.initNonuniformCatmullRom(p0.y, p1.y, p2.y, p3.y, dt0, dt1, dt2);
			pz.initNonuniformCatmullRom(p0.z, p1.z, p2.z, p3.z, dt0, dt1, dt2);
		} else if (this.curveType === 'catmullrom') {
			px.initCatmullRom(p0.x, p1.x, p2.x, p3.x, this.tension);
			py.initCatmullRom(p0.y, p1.y, p2.y, p3.y, this.tension);
			pz.initCatmullRom(p0.z, p1.z, p2.z, p3.z, this.tension);
		}

		point.set(px.calc(weight), py.calc(weight), pz.calc(weight));
		return point;
	};

	CatmullRomCurve3.prototype.copy = function (source) {
		Curve.prototype.copy.call(this, source);
		this.points = [];

		for (var i = 0, l = source.points.length; i < l; i++) {
			var point = source.points[i];
			this.points.push(point.clone());
		}

		this.closed = source.closed;
		this.curveType = source.curveType;
		this.tension = source.tension;
		return this;
	};

	CatmullRomCurve3.prototype.toJSON = function () {
		var data = Curve.prototype.toJSON.call(this);
		data.points = [];

		for (var i = 0, l = this.points.length; i < l; i++) {
			var point = this.points[i];
			data.points.push(point.toArray());
		}

		data.closed = this.closed;
		data.curveType = this.curveType;
		data.tension = this.tension;
		return data;
	};

	CatmullRomCurve3.prototype.fromJSON = function (json) {
		Curve.prototype.fromJSON.call(this, json);
		this.points = [];

		for (var i = 0, l = json.points.length; i < l; i++) {
			var point = json.points[i];
			this.points.push(new Vector3().fromArray(point));
		}

		this.closed = json.closed;
		this.curveType = json.curveType;
		this.tension = json.tension;
		return this;
	};

	/**
	 * Bezier Curves formulas obtained from
	 * http://en.wikipedia.org/wiki/Bézier_curve
	 */
	function CatmullRom(t, p0, p1, p2, p3) {
		var v0 = (p2 - p0) * 0.5;
		var v1 = (p3 - p1) * 0.5;
		var t2 = t * t;
		var t3 = t * t2;
		return (2 * p1 - 2 * p2 + v0 + v1) * t3 + (-3 * p1 + 3 * p2 - 2 * v0 - v1) * t2 + v0 * t + p1;
	} //


	function QuadraticBezierP0(t, p) {
		var k = 1 - t;
		return k * k * p;
	}

	function QuadraticBezierP1(t, p) {
		return 2 * (1 - t) * t * p;
	}

	function QuadraticBezierP2(t, p) {
		return t * t * p;
	}

	function QuadraticBezier(t, p0, p1, p2) {
		return QuadraticBezierP0(t, p0) + QuadraticBezierP1(t, p1) + QuadraticBezierP2(t, p2);
	} //


	function CubicBezierP0(t, p) {
		var k = 1 - t;
		return k * k * k * p;
	}

	function CubicBezierP1(t, p) {
		var k = 1 - t;
		return 3 * k * k * t * p;
	}

	function CubicBezierP2(t, p) {
		return 3 * (1 - t) * t * t * p;
	}

	function CubicBezierP3(t, p) {
		return t * t * t * p;
	}

	function CubicBezier(t, p0, p1, p2, p3) {
		return CubicBezierP0(t, p0) + CubicBezierP1(t, p1) + CubicBezierP2(t, p2) + CubicBezierP3(t, p3);
	}

	function CubicBezierCurve(v0, v1, v2, v3) {
		if (v0 === void 0) {
			v0 = new Vector2();
		}

		if (v1 === void 0) {
			v1 = new Vector2();
		}

		if (v2 === void 0) {
			v2 = new Vector2();
		}

		if (v3 === void 0) {
			v3 = new Vector2();
		}

		Curve.call(this);
		this.type = 'CubicBezierCurve';
		this.v0 = v0;
		this.v1 = v1;
		this.v2 = v2;
		this.v3 = v3;
	}

	CubicBezierCurve.prototype = Object.create(Curve.prototype);
	CubicBezierCurve.prototype.constructor = CubicBezierCurve;
	CubicBezierCurve.prototype.isCubicBezierCurve = true;

	CubicBezierCurve.prototype.getPoint = function (t, optionalTarget) {
		if (optionalTarget === void 0) {
			optionalTarget = new Vector2();
		}

		var point = optionalTarget;
		var v0 = this.v0,
				v1 = this.v1,
				v2 = this.v2,
				v3 = this.v3;
		point.set(CubicBezier(t, v0.x, v1.x, v2.x, v3.x), CubicBezier(t, v0.y, v1.y, v2.y, v3.y));
		return point;
	};

	CubicBezierCurve.prototype.copy = function (source) {
		Curve.prototype.copy.call(this, source);
		this.v0.copy(source.v0);
		this.v1.copy(source.v1);
		this.v2.copy(source.v2);
		this.v3.copy(source.v3);
		return this;
	};

	CubicBezierCurve.prototype.toJSON = function () {
		var data = Curve.prototype.toJSON.call(this);
		data.v0 = this.v0.toArray();
		data.v1 = this.v1.toArray();
		data.v2 = this.v2.toArray();
		data.v3 = this.v3.toArray();
		return data;
	};

	CubicBezierCurve.prototype.fromJSON = function (json) {
		Curve.prototype.fromJSON.call(this, json);
		this.v0.fromArray(json.v0);
		this.v1.fromArray(json.v1);
		this.v2.fromArray(json.v2);
		this.v3.fromArray(json.v3);
		return this;
	};

	function CubicBezierCurve3(v0, v1, v2, v3) {
		if (v0 === void 0) {
			v0 = new Vector3();
		}

		if (v1 === void 0) {
			v1 = new Vector3();
		}

		if (v2 === void 0) {
			v2 = new Vector3();
		}

		if (v3 === void 0) {
			v3 = new Vector3();
		}

		Curve.call(this);
		this.type = 'CubicBezierCurve3';
		this.v0 = v0;
		this.v1 = v1;
		this.v2 = v2;
		this.v3 = v3;
	}

	CubicBezierCurve3.prototype = Object.create(Curve.prototype);
	CubicBezierCurve3.prototype.constructor = CubicBezierCurve3;
	CubicBezierCurve3.prototype.isCubicBezierCurve3 = true;

	CubicBezierCurve3.prototype.getPoint = function (t, optionalTarget) {
		if (optionalTarget === void 0) {
			optionalTarget = new Vector3();
		}

		var point = optionalTarget;
		var v0 = this.v0,
				v1 = this.v1,
				v2 = this.v2,
				v3 = this.v3;
		point.set(CubicBezier(t, v0.x, v1.x, v2.x, v3.x), CubicBezier(t, v0.y, v1.y, v2.y, v3.y), CubicBezier(t, v0.z, v1.z, v2.z, v3.z));
		return point;
	};

	CubicBezierCurve3.prototype.copy = function (source) {
		Curve.prototype.copy.call(this, source);
		this.v0.copy(source.v0);
		this.v1.copy(source.v1);
		this.v2.copy(source.v2);
		this.v3.copy(source.v3);
		return this;
	};

	CubicBezierCurve3.prototype.toJSON = function () {
		var data = Curve.prototype.toJSON.call(this);
		data.v0 = this.v0.toArray();
		data.v1 = this.v1.toArray();
		data.v2 = this.v2.toArray();
		data.v3 = this.v3.toArray();
		return data;
	};

	CubicBezierCurve3.prototype.fromJSON = function (json) {
		Curve.prototype.fromJSON.call(this, json);
		this.v0.fromArray(json.v0);
		this.v1.fromArray(json.v1);
		this.v2.fromArray(json.v2);
		this.v3.fromArray(json.v3);
		return this;
	};

	function LineCurve(v1, v2) {
		if (v1 === void 0) {
			v1 = new Vector2();
		}

		if (v2 === void 0) {
			v2 = new Vector2();
		}

		Curve.call(this);
		this.type = 'LineCurve';
		this.v1 = v1;
		this.v2 = v2;
	}

	LineCurve.prototype = Object.create(Curve.prototype);
	LineCurve.prototype.constructor = LineCurve;
	LineCurve.prototype.isLineCurve = true;

	LineCurve.prototype.getPoint = function (t, optionalTarget) {
		if (optionalTarget === void 0) {
			optionalTarget = new Vector2();
		}

		var point = optionalTarget;

		if (t === 1) {
			point.copy(this.v2);
		} else {
			point.copy(this.v2).sub(this.v1);
			point.multiplyScalar(t).add(this.v1);
		}

		return point;
	}; // Line curve is linear, so we can overwrite default getPointAt


	LineCurve.prototype.getPointAt = function (u, optionalTarget) {
		return this.getPoint(u, optionalTarget);
	};

	LineCurve.prototype.getTangent = function (t, optionalTarget) {
		var tangent = optionalTarget || new Vector2();
		tangent.copy(this.v2).sub(this.v1).normalize();
		return tangent;
	};

	LineCurve.prototype.copy = function (source) {
		Curve.prototype.copy.call(this, source);
		this.v1.copy(source.v1);
		this.v2.copy(source.v2);
		return this;
	};

	LineCurve.prototype.toJSON = function () {
		var data = Curve.prototype.toJSON.call(this);
		data.v1 = this.v1.toArray();
		data.v2 = this.v2.toArray();
		return data;
	};

	LineCurve.prototype.fromJSON = function (json) {
		Curve.prototype.fromJSON.call(this, json);
		this.v1.fromArray(json.v1);
		this.v2.fromArray(json.v2);
		return this;
	};

	function LineCurve3(v1, v2) {
		if (v1 === void 0) {
			v1 = new Vector3();
		}

		if (v2 === void 0) {
			v2 = new Vector3();
		}

		Curve.call(this);
		this.type = 'LineCurve3';
		this.v1 = v1;
		this.v2 = v2;
	}

	LineCurve3.prototype = Object.create(Curve.prototype);
	LineCurve3.prototype.constructor = LineCurve3;
	LineCurve3.prototype.isLineCurve3 = true;

	LineCurve3.prototype.getPoint = function (t, optionalTarget) {
		if (optionalTarget === void 0) {
			optionalTarget = new Vector3();
		}

		var point = optionalTarget;

		if (t === 1) {
			point.copy(this.v2);
		} else {
			point.copy(this.v2).sub(this.v1);
			point.multiplyScalar(t).add(this.v1);
		}

		return point;
	}; // Line curve is linear, so we can overwrite default getPointAt


	LineCurve3.prototype.getPointAt = function (u, optionalTarget) {
		return this.getPoint(u, optionalTarget);
	};

	LineCurve3.prototype.copy = function (source) {
		Curve.prototype.copy.call(this, source);
		this.v1.copy(source.v1);
		this.v2.copy(source.v2);
		return this;
	};

	LineCurve3.prototype.toJSON = function () {
		var data = Curve.prototype.toJSON.call(this);
		data.v1 = this.v1.toArray();
		data.v2 = this.v2.toArray();
		return data;
	};

	LineCurve3.prototype.fromJSON = function (json) {
		Curve.prototype.fromJSON.call(this, json);
		this.v1.fromArray(json.v1);
		this.v2.fromArray(json.v2);
		return this;
	};

	function QuadraticBezierCurve(v0, v1, v2) {
		if (v0 === void 0) {
			v0 = new Vector2();
		}

		if (v1 === void 0) {
			v1 = new Vector2();
		}

		if (v2 === void 0) {
			v2 = new Vector2();
		}

		Curve.call(this);
		this.type = 'QuadraticBezierCurve';
		this.v0 = v0;
		this.v1 = v1;
		this.v2 = v2;
	}

	QuadraticBezierCurve.prototype = Object.create(Curve.prototype);
	QuadraticBezierCurve.prototype.constructor = QuadraticBezierCurve;
	QuadraticBezierCurve.prototype.isQuadraticBezierCurve = true;

	QuadraticBezierCurve.prototype.getPoint = function (t, optionalTarget) {
		if (optionalTarget === void 0) {
			optionalTarget = new Vector2();
		}

		var point = optionalTarget;
		var v0 = this.v0,
				v1 = this.v1,
				v2 = this.v2;
		point.set(QuadraticBezier(t, v0.x, v1.x, v2.x), QuadraticBezier(t, v0.y, v1.y, v2.y));
		return point;
	};

	QuadraticBezierCurve.prototype.copy = function (source) {
		Curve.prototype.copy.call(this, source);
		this.v0.copy(source.v0);
		this.v1.copy(source.v1);
		this.v2.copy(source.v2);
		return this;
	};

	QuadraticBezierCurve.prototype.toJSON = function () {
		var data = Curve.prototype.toJSON.call(this);
		data.v0 = this.v0.toArray();
		data.v1 = this.v1.toArray();
		data.v2 = this.v2.toArray();
		return data;
	};

	QuadraticBezierCurve.prototype.fromJSON = function (json) {
		Curve.prototype.fromJSON.call(this, json);
		this.v0.fromArray(json.v0);
		this.v1.fromArray(json.v1);
		this.v2.fromArray(json.v2);
		return this;
	};

	function QuadraticBezierCurve3(v0, v1, v2) {
		if (v0 === void 0) {
			v0 = new Vector3();
		}

		if (v1 === void 0) {
			v1 = new Vector3();
		}

		if (v2 === void 0) {
			v2 = new Vector3();
		}

		Curve.call(this);
		this.type = 'QuadraticBezierCurve3';
		this.v0 = v0;
		this.v1 = v1;
		this.v2 = v2;
	}

	QuadraticBezierCurve3.prototype = Object.create(Curve.prototype);
	QuadraticBezierCurve3.prototype.constructor = QuadraticBezierCurve3;
	QuadraticBezierCurve3.prototype.isQuadraticBezierCurve3 = true;

	QuadraticBezierCurve3.prototype.getPoint = function (t, optionalTarget) {
		if (optionalTarget === void 0) {
			optionalTarget = new Vector3();
		}

		var point = optionalTarget;
		var v0 = this.v0,
				v1 = this.v1,
				v2 = this.v2;
		point.set(QuadraticBezier(t, v0.x, v1.x, v2.x), QuadraticBezier(t, v0.y, v1.y, v2.y), QuadraticBezier(t, v0.z, v1.z, v2.z));
		return point;
	};

	QuadraticBezierCurve3.prototype.copy = function (source) {
		Curve.prototype.copy.call(this, source);
		this.v0.copy(source.v0);
		this.v1.copy(source.v1);
		this.v2.copy(source.v2);
		return this;
	};

	QuadraticBezierCurve3.prototype.toJSON = function () {
		var data = Curve.prototype.toJSON.call(this);
		data.v0 = this.v0.toArray();
		data.v1 = this.v1.toArray();
		data.v2 = this.v2.toArray();
		return data;
	};

	QuadraticBezierCurve3.prototype.fromJSON = function (json) {
		Curve.prototype.fromJSON.call(this, json);
		this.v0.fromArray(json.v0);
		this.v1.fromArray(json.v1);
		this.v2.fromArray(json.v2);
		return this;
	};

	function SplineCurve(points) {
		if (points === void 0) {
			points = [];
		}

		Curve.call(this);
		this.type = 'SplineCurve';
		this.points = points;
	}

	SplineCurve.prototype = Object.create(Curve.prototype);
	SplineCurve.prototype.constructor = SplineCurve;
	SplineCurve.prototype.isSplineCurve = true;

	SplineCurve.prototype.getPoint = function (t, optionalTarget) {
		if (optionalTarget === void 0) {
			optionalTarget = new Vector2();
		}

		var point = optionalTarget;
		var points = this.points;
		var p = (points.length - 1) * t;
		var intPoint = Math.floor(p);
		var weight = p - intPoint;
		var p0 = points[intPoint === 0 ? intPoint : intPoint - 1];
		var p1 = points[intPoint];
		var p2 = points[intPoint > points.length - 2 ? points.length - 1 : intPoint + 1];
		var p3 = points[intPoint > points.length - 3 ? points.length - 1 : intPoint + 2];
		point.set(CatmullRom(weight, p0.x, p1.x, p2.x, p3.x), CatmullRom(weight, p0.y, p1.y, p2.y, p3.y));
		return point;
	};

	SplineCurve.prototype.copy = function (source) {
		Curve.prototype.copy.call(this, source);
		this.points = [];

		for (var i = 0, l = source.points.length; i < l; i++) {
			var point = source.points[i];
			this.points.push(point.clone());
		}

		return this;
	};

	SplineCurve.prototype.toJSON = function () {
		var data = Curve.prototype.toJSON.call(this);
		data.points = [];

		for (var i = 0, l = this.points.length; i < l; i++) {
			var point = this.points[i];
			data.points.push(point.toArray());
		}

		return data;
	};

	SplineCurve.prototype.fromJSON = function (json) {
		Curve.prototype.fromJSON.call(this, json);
		this.points = [];

		for (var i = 0, l = json.points.length; i < l; i++) {
			var point = json.points[i];
			this.points.push(new Vector2().fromArray(point));
		}

		return this;
	};

	var Curves = /*#__PURE__*/Object.freeze({
		__proto__: null,
		ArcCurve: ArcCurve,
		CatmullRomCurve3: CatmullRomCurve3,
		CubicBezierCurve: CubicBezierCurve,
		CubicBezierCurve3: CubicBezierCurve3,
		EllipseCurve: EllipseCurve,
		LineCurve: LineCurve,
		LineCurve3: LineCurve3,
		QuadraticBezierCurve: QuadraticBezierCurve,
		QuadraticBezierCurve3: QuadraticBezierCurve3,
		SplineCurve: SplineCurve
	});

	/**************************************************************
	 *	Curved Path - a curve path is simply a array of connected
	 *	curves, but retains the api of a curve
	 **************************************************************/

	function CurvePath() {
		Curve.call(this);
		this.type = 'CurvePath';
		this.curves = [];
		this.autoClose = false; // Automatically closes the path
	}

	CurvePath.prototype = Object.assign(Object.create(Curve.prototype), {
		constructor: CurvePath,
		add: function add(curve) {
			this.curves.push(curve);
		},
		closePath: function closePath() {
			// Add a line curve if start and end of lines are not connected
			var startPoint = this.curves[0].getPoint(0);
			var endPoint = this.curves[this.curves.length - 1].getPoint(1);

			if (!startPoint.equals(endPoint)) {
				this.curves.push(new LineCurve(endPoint, startPoint));
			}
		},
		// To get accurate point with reference to
		// entire path distance at time t,
		// following has to be done:
		// 1. Length of each sub path have to be known
		// 2. Locate and identify type of curve
		// 3. Get t for the curve
		// 4. Return curve.getPointAt(t')
		getPoint: function getPoint(t) {
			var d = t * this.getLength();
			var curveLengths = this.getCurveLengths();
			var i = 0; // To think about boundaries points.

			while (i < curveLengths.length) {
				if (curveLengths[i] >= d) {
					var diff = curveLengths[i] - d;
					var curve = this.curves[i];
					var segmentLength = curve.getLength();
					var u = segmentLength === 0 ? 0 : 1 - diff / segmentLength;
					return curve.getPointAt(u);
				}

				i++;
			}

			return null; // loop where sum != 0, sum > d , sum+1 <d
		},
		// We cannot use the default THREE.Curve getPoint() with getLength() because in
		// THREE.Curve, getLength() depends on getPoint() but in THREE.CurvePath
		// getPoint() depends on getLength
		getLength: function getLength() {
			var lens = this.getCurveLengths();
			return lens[lens.length - 1];
		},
		// cacheLengths must be recalculated.
		updateArcLengths: function updateArcLengths() {
			this.needsUpdate = true;
			this.cacheLengths = null;
			this.getCurveLengths();
		},
		// Compute lengths and cache them
		// We cannot overwrite getLengths() because UtoT mapping uses it.
		getCurveLengths: function getCurveLengths() {
			// We use cache values if curves and cache array are same length
			if (this.cacheLengths && this.cacheLengths.length === this.curves.length) {
				return this.cacheLengths;
			} // Get length of sub-curve
			// Push sums into cached array


			var lengths = [];
			var sums = 0;

			for (var i = 0, l = this.curves.length; i < l; i++) {
				sums += this.curves[i].getLength();
				lengths.push(sums);
			}

			this.cacheLengths = lengths;
			return lengths;
		},
		getSpacedPoints: function getSpacedPoints(divisions) {
			if (divisions === void 0) {
				divisions = 40;
			}

			var points = [];

			for (var i = 0; i <= divisions; i++) {
				points.push(this.getPoint(i / divisions));
			}

			if (this.autoClose) {
				points.push(points[0]);
			}

			return points;
		},
		getPoints: function getPoints(divisions) {
			if (divisions === void 0) {
				divisions = 12;
			}

			var points = [];
			var last;

			for (var i = 0, curves = this.curves; i < curves.length; i++) {
				var curve = curves[i];
				var resolution = curve && curve.isEllipseCurve ? divisions * 2 : curve && (curve.isLineCurve || curve.isLineCurve3) ? 1 : curve && curve.isSplineCurve ? divisions * curve.points.length : divisions;
				var pts = curve.getPoints(resolution);

				for (var j = 0; j < pts.length; j++) {
					var point = pts[j];
					if (last && last.equals(point)) continue; // ensures no consecutive points are duplicates

					points.push(point);
					last = point;
				}
			}

			if (this.autoClose && points.length > 1 && !points[points.length - 1].equals(points[0])) {
				points.push(points[0]);
			}

			return points;
		},
		copy: function copy(source) {
			Curve.prototype.copy.call(this, source);
			this.curves = [];

			for (var i = 0, l = source.curves.length; i < l; i++) {
				var curve = source.curves[i];
				this.curves.push(curve.clone());
			}

			this.autoClose = source.autoClose;
			return this;
		},
		toJSON: function toJSON() {
			var data = Curve.prototype.toJSON.call(this);
			data.autoClose = this.autoClose;
			data.curves = [];

			for (var i = 0, l = this.curves.length; i < l; i++) {
				var curve = this.curves[i];
				data.curves.push(curve.toJSON());
			}

			return data;
		},
		fromJSON: function fromJSON(json) {
			Curve.prototype.fromJSON.call(this, json);
			this.autoClose = json.autoClose;
			this.curves = [];

			for (var i = 0, l = json.curves.length; i < l; i++) {
				var curve = json.curves[i];
				this.curves.push(new Curves[curve.type]().fromJSON(curve));
			}

			return this;
		}
	});

	function Path(points) {
		CurvePath.call(this);
		this.type = 'Path';
		this.currentPoint = new Vector2();

		if (points) {
			this.setFromPoints(points);
		}
	}

	Path.prototype = Object.assign(Object.create(CurvePath.prototype), {
		constructor: Path,
		setFromPoints: function setFromPoints(points) {
			this.moveTo(points[0].x, points[0].y);

			for (var i = 1, l = points.length; i < l; i++) {
				this.lineTo(points[i].x, points[i].y);
			}

			return this;
		},
		moveTo: function moveTo(x, y) {
			this.currentPoint.set(x, y); // TODO consider referencing vectors instead of copying?

			return this;
		},
		lineTo: function lineTo(x, y) {
			var curve = new LineCurve(this.currentPoint.clone(), new Vector2(x, y));
			this.curves.push(curve);
			this.currentPoint.set(x, y);
			return this;
		},
		quadraticCurveTo: function quadraticCurveTo(aCPx, aCPy, aX, aY) {
			var curve = new QuadraticBezierCurve(this.currentPoint.clone(), new Vector2(aCPx, aCPy), new Vector2(aX, aY));
			this.curves.push(curve);
			this.currentPoint.set(aX, aY);
			return this;
		},
		bezierCurveTo: function bezierCurveTo(aCP1x, aCP1y, aCP2x, aCP2y, aX, aY) {
			var curve = new CubicBezierCurve(this.currentPoint.clone(), new Vector2(aCP1x, aCP1y), new Vector2(aCP2x, aCP2y), new Vector2(aX, aY));
			this.curves.push(curve);
			this.currentPoint.set(aX, aY);
			return this;
		},
		splineThru: function splineThru(pts
		/*Array of Vector*/
		) {
			var npts = [this.currentPoint.clone()].concat(pts);
			var curve = new SplineCurve(npts);
			this.curves.push(curve);
			this.currentPoint.copy(pts[pts.length - 1]);
			return this;
		},
		arc: function arc(aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise) {
			var x0 = this.currentPoint.x;
			var y0 = this.currentPoint.y;
			this.absarc(aX + x0, aY + y0, aRadius, aStartAngle, aEndAngle, aClockwise);
			return this;
		},
		absarc: function absarc(aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise) {
			this.absellipse(aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise);
			return this;
		},
		ellipse: function ellipse(aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation) {
			var x0 = this.currentPoint.x;
			var y0 = this.currentPoint.y;
			this.absellipse(aX + x0, aY + y0, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation);
			return this;
		},
		absellipse: function absellipse(aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation) {
			var curve = new EllipseCurve(aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation);

			if (this.curves.length > 0) {
				// if a previous curve is present, attempt to join
				var firstPoint = curve.getPoint(0);

				if (!firstPoint.equals(this.currentPoint)) {
					this.lineTo(firstPoint.x, firstPoint.y);
				}
			}

			this.curves.push(curve);
			var lastPoint = curve.getPoint(1);
			this.currentPoint.copy(lastPoint);
			return this;
		},
		copy: function copy(source) {
			CurvePath.prototype.copy.call(this, source);
			this.currentPoint.copy(source.currentPoint);
			return this;
		},
		toJSON: function toJSON() {
			var data = CurvePath.prototype.toJSON.call(this);
			data.currentPoint = this.currentPoint.toArray();
			return data;
		},
		fromJSON: function fromJSON(json) {
			CurvePath.prototype.fromJSON.call(this, json);
			this.currentPoint.fromArray(json.currentPoint);
			return this;
		}
	});

	function Shape(points) {
		Path.call(this, points);
		this.uuid = MathUtils.generateUUID();
		this.type = 'Shape';
		this.holes = [];
	}

	Shape.prototype = Object.assign(Object.create(Path.prototype), {
		constructor: Shape,
		getPointsHoles: function getPointsHoles(divisions) {
			var holesPts = [];

			for (var i = 0, l = this.holes.length; i < l; i++) {
				holesPts[i] = this.holes[i].getPoints(divisions);
			}

			return holesPts;
		},
		// get points of shape and holes (keypoints based on segments parameter)
		extractPoints: function extractPoints(divisions) {
			return {
				shape: this.getPoints(divisions),
				holes: this.getPointsHoles(divisions)
			};
		},
		copy: function copy(source) {
			Path.prototype.copy.call(this, source);
			this.holes = [];

			for (var i = 0, l = source.holes.length; i < l; i++) {
				var hole = source.holes[i];
				this.holes.push(hole.clone());
			}

			return this;
		},
		toJSON: function toJSON() {
			var data = Path.prototype.toJSON.call(this);
			data.uuid = this.uuid;
			data.holes = [];

			for (var i = 0, l = this.holes.length; i < l; i++) {
				var hole = this.holes[i];
				data.holes.push(hole.toJSON());
			}

			return data;
		},
		fromJSON: function fromJSON(json) {
			Path.prototype.fromJSON.call(this, json);
			this.uuid = json.uuid;
			this.holes = [];

			for (var i = 0, l = json.holes.length; i < l; i++) {
				var hole = json.holes[i];
				this.holes.push(new Path().fromJSON(hole));
			}

			return this;
		}
	});

	function Light(color, intensity) {
		if (intensity === void 0) {
			intensity = 1;
		}

		Object3D.call(this);
		this.type = 'Light';
		this.color = new Color(color);
		this.intensity = intensity;
	}

	Light.prototype = Object.assign(Object.create(Object3D.prototype), {
		constructor: Light,
		isLight: true,
		copy: function copy(source) {
			Object3D.prototype.copy.call(this, source);
			this.color.copy(source.color);
			this.intensity = source.intensity;
			return this;
		},
		toJSON: function toJSON(meta) {
			var data = Object3D.prototype.toJSON.call(this, meta);
			data.object.color = this.color.getHex();
			data.object.intensity = this.intensity;
			if (this.groundColor !== undefined) data.object.groundColor = this.groundColor.getHex();
			if (this.distance !== undefined) data.object.distance = this.distance;
			if (this.angle !== undefined) data.object.angle = this.angle;
			if (this.decay !== undefined) data.object.decay = this.decay;
			if (this.penumbra !== undefined) data.object.penumbra = this.penumbra;
			if (this.shadow !== undefined) data.object.shadow = this.shadow.toJSON();
			return data;
		}
	});

	function HemisphereLight(skyColor, groundColor, intensity) {
		Light.call(this, skyColor, intensity);
		this.type = 'HemisphereLight';
		this.position.copy(Object3D.DefaultUp);
		this.updateMatrix();
		this.groundColor = new Color(groundColor);
	}

	HemisphereLight.prototype = Object.assign(Object.create(Light.prototype), {
		constructor: HemisphereLight,
		isHemisphereLight: true,
		copy: function copy(source) {
			Light.prototype.copy.call(this, source);
			this.groundColor.copy(source.groundColor);
			return this;
		}
	});

	function LightShadow(camera) {
		this.camera = camera;
		this.bias = 0;
		this.normalBias = 0;
		this.radius = 1;
		this.mapSize = new Vector2(512, 512);
		this.map = null;
		this.mapPass = null;
		this.matrix = new Matrix4();
		this.autoUpdate = true;
		this.needsUpdate = false;
		this._frustum = new Frustum();
		this._frameExtents = new Vector2(1, 1);
		this._viewportCount = 1;
		this._viewports = [new Vector4(0, 0, 1, 1)];
	}

	Object.assign(LightShadow.prototype, {
		_projScreenMatrix: new Matrix4(),
		_lightPositionWorld: new Vector3(),
		_lookTarget: new Vector3(),
		getViewportCount: function getViewportCount() {
			return this._viewportCount;
		},
		getFrustum: function getFrustum() {
			return this._frustum;
		},
		updateMatrices: function updateMatrices(light) {
			var shadowCamera = this.camera,
					shadowMatrix = this.matrix,
					projScreenMatrix = this._projScreenMatrix,
					lookTarget = this._lookTarget,
					lightPositionWorld = this._lightPositionWorld;
			lightPositionWorld.setFromMatrixPosition(light.matrixWorld);
			shadowCamera.position.copy(lightPositionWorld);
			lookTarget.setFromMatrixPosition(light.target.matrixWorld);
			shadowCamera.lookAt(lookTarget);
			shadowCamera.updateMatrixWorld();
			projScreenMatrix.multiplyMatrices(shadowCamera.projectionMatrix, shadowCamera.matrixWorldInverse);

			this._frustum.setFromProjectionMatrix(projScreenMatrix);

			shadowMatrix.set(0.5, 0.0, 0.0, 0.5, 0.0, 0.5, 0.0, 0.5, 0.0, 0.0, 0.5, 0.5, 0.0, 0.0, 0.0, 1.0);
			shadowMatrix.multiply(shadowCamera.projectionMatrix);
			shadowMatrix.multiply(shadowCamera.matrixWorldInverse);
		},
		getViewport: function getViewport(viewportIndex) {
			return this._viewports[viewportIndex];
		},
		getFrameExtents: function getFrameExtents() {
			return this._frameExtents;
		},
		copy: function copy(source) {
			this.camera = source.camera.clone();
			this.bias = source.bias;
			this.radius = source.radius;
			this.mapSize.copy(source.mapSize);
			return this;
		},
		clone: function clone() {
			return new this.constructor().copy(this);
		},
		toJSON: function toJSON() {
			var object = {};
			if (this.bias !== 0) object.bias = this.bias;
			if (this.normalBias !== 0) object.normalBias = this.normalBias;
			if (this.radius !== 1) object.radius = this.radius;
			if (this.mapSize.x !== 512 || this.mapSize.y !== 512) object.mapSize = this.mapSize.toArray();
			object.camera = this.camera.toJSON(false).object;
			delete object.camera.matrix;
			return object;
		}
	});

	function SpotLightShadow() {
		LightShadow.call(this, new PerspectiveCamera(50, 1, 0.5, 500));
		this.focus = 1;
	}

	SpotLightShadow.prototype = Object.assign(Object.create(LightShadow.prototype), {
		constructor: SpotLightShadow,
		isSpotLightShadow: true,
		updateMatrices: function updateMatrices(light) {
			var camera = this.camera;
			var fov = MathUtils.RAD2DEG * 2 * light.angle * this.focus;
			var aspect = this.mapSize.width / this.mapSize.height;
			var far = light.distance || camera.far;

			if (fov !== camera.fov || aspect !== camera.aspect || far !== camera.far) {
				camera.fov = fov;
				camera.aspect = aspect;
				camera.far = far;
				camera.updateProjectionMatrix();
			}

			LightShadow.prototype.updateMatrices.call(this, light);
		}
	});

	function SpotLight(color, intensity, distance, angle, penumbra, decay) {
		Light.call(this, color, intensity);
		this.type = 'SpotLight';
		this.position.copy(Object3D.DefaultUp);
		this.updateMatrix();
		this.target = new Object3D();
		Object.defineProperty(this, 'power', {
			get: function get() {
				// intensity = power per solid angle.
				// ref: equation (17) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf
				return this.intensity * Math.PI;
			},
			set: function set(power) {
				// intensity = power per solid angle.
				// ref: equation (17) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf
				this.intensity = power / Math.PI;
			}
		});
		this.distance = distance !== undefined ? distance : 0;
		this.angle = angle !== undefined ? angle : Math.PI / 3;
		this.penumbra = penumbra !== undefined ? penumbra : 0;
		this.decay = decay !== undefined ? decay : 1; // for physically correct lights, should be 2.

		this.shadow = new SpotLightShadow();
	}

	SpotLight.prototype = Object.assign(Object.create(Light.prototype), {
		constructor: SpotLight,
		isSpotLight: true,
		copy: function copy(source) {
			Light.prototype.copy.call(this, source);
			this.distance = source.distance;
			this.angle = source.angle;
			this.penumbra = source.penumbra;
			this.decay = source.decay;
			this.target = source.target.clone();
			this.shadow = source.shadow.clone();
			return this;
		}
	});

	function PointLightShadow() {
		LightShadow.call(this, new PerspectiveCamera(90, 1, 0.5, 500));
		this._frameExtents = new Vector2(4, 2);
		this._viewportCount = 6;
		this._viewports = [// These viewports map a cube-map onto a 2D texture with the
		// following orientation:
		//
		//	xzXZ
		//	 y Y
		//
		// X - Positive x direction
		// x - Negative x direction
		// Y - Positive y direction
		// y - Negative y direction
		// Z - Positive z direction
		// z - Negative z direction
		// positive X
		new Vector4(2, 1, 1, 1), // negative X
		new Vector4(0, 1, 1, 1), // positive Z
		new Vector4(3, 1, 1, 1), // negative Z
		new Vector4(1, 1, 1, 1), // positive Y
		new Vector4(3, 0, 1, 1), // negative Y
		new Vector4(1, 0, 1, 1)];
		this._cubeDirections = [new Vector3(1, 0, 0), new Vector3(-1, 0, 0), new Vector3(0, 0, 1), new Vector3(0, 0, -1), new Vector3(0, 1, 0), new Vector3(0, -1, 0)];
		this._cubeUps = [new Vector3(0, 1, 0), new Vector3(0, 1, 0), new Vector3(0, 1, 0), new Vector3(0, 1, 0), new Vector3(0, 0, 1), new Vector3(0, 0, -1)];
	}

	PointLightShadow.prototype = Object.assign(Object.create(LightShadow.prototype), {
		constructor: PointLightShadow,
		isPointLightShadow: true,
		updateMatrices: function updateMatrices(light, viewportIndex) {
			if (viewportIndex === void 0) {
				viewportIndex = 0;
			}

			var camera = this.camera,
					shadowMatrix = this.matrix,
					lightPositionWorld = this._lightPositionWorld,
					lookTarget = this._lookTarget,
					projScreenMatrix = this._projScreenMatrix;
			lightPositionWorld.setFromMatrixPosition(light.matrixWorld);
			camera.position.copy(lightPositionWorld);
			lookTarget.copy(camera.position);
			lookTarget.add(this._cubeDirections[viewportIndex]);
			camera.up.copy(this._cubeUps[viewportIndex]);
			camera.lookAt(lookTarget);
			camera.updateMatrixWorld();
			shadowMatrix.makeTranslation(-lightPositionWorld.x, -lightPositionWorld.y, -lightPositionWorld.z);
			projScreenMatrix.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);

			this._frustum.setFromProjectionMatrix(projScreenMatrix);
		}
	});

	function PointLight(color, intensity, distance, decay) {
		Light.call(this, color, intensity);
		this.type = 'PointLight';
		Object.defineProperty(this, 'power', {
			get: function get() {
				// intensity = power per solid angle.
				// ref: equation (15) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf
				return this.intensity * 4 * Math.PI;
			},
			set: function set(power) {
				// intensity = power per solid angle.
				// ref: equation (15) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf
				this.intensity = power / (4 * Math.PI);
			}
		});
		this.distance = distance !== undefined ? distance : 0;
		this.decay = decay !== undefined ? decay : 1; // for physically correct lights, should be 2.

		this.shadow = new PointLightShadow();
	}

	PointLight.prototype = Object.assign(Object.create(Light.prototype), {
		constructor: PointLight,
		isPointLight: true,
		copy: function copy(source) {
			Light.prototype.copy.call(this, source);
			this.distance = source.distance;
			this.decay = source.decay;
			this.shadow = source.shadow.clone();
			return this;
		}
	});

	function OrthographicCamera(left, right, top, bottom, near, far) {
		if (left === void 0) {
			left = -1;
		}

		if (right === void 0) {
			right = 1;
		}

		if (top === void 0) {
			top = 1;
		}

		if (bottom === void 0) {
			bottom = -1;
		}

		if (near === void 0) {
			near = 0.1;
		}

		if (far === void 0) {
			far = 2000;
		}

		Camera.call(this);
		this.type = 'OrthographicCamera';
		this.zoom = 1;
		this.view = null;
		this.left = left;
		this.right = right;
		this.top = top;
		this.bottom = bottom;
		this.near = near;
		this.far = far;
		this.updateProjectionMatrix();
	}

	OrthographicCamera.prototype = Object.assign(Object.create(Camera.prototype), {
		constructor: OrthographicCamera,
		isOrthographicCamera: true,
		copy: function copy(source, recursive) {
			Camera.prototype.copy.call(this, source, recursive);
			this.left = source.left;
			this.right = source.right;
			this.top = source.top;
			this.bottom = source.bottom;
			this.near = source.near;
			this.far = source.far;
			this.zoom = source.zoom;
			this.view = source.view === null ? null : Object.assign({}, source.view);
			return this;
		},
		setViewOffset: function setViewOffset(fullWidth, fullHeight, x, y, width, height) {
			if (this.view === null) {
				this.view = {
					enabled: true,
					fullWidth: 1,
					fullHeight: 1,
					offsetX: 0,
					offsetY: 0,
					width: 1,
					height: 1
				};
			}

			this.view.enabled = true;
			this.view.fullWidth = fullWidth;
			this.view.fullHeight = fullHeight;
			this.view.offsetX = x;
			this.view.offsetY = y;
			this.view.width = width;
			this.view.height = height;
			this.updateProjectionMatrix();
		},
		clearViewOffset: function clearViewOffset() {
			if (this.view !== null) {
				this.view.enabled = false;
			}

			this.updateProjectionMatrix();
		},
		updateProjectionMatrix: function updateProjectionMatrix() {
			var dx = (this.right - this.left) / (2 * this.zoom);
			var dy = (this.top - this.bottom) / (2 * this.zoom);
			var cx = (this.right + this.left) / 2;
			var cy = (this.top + this.bottom) / 2;
			var left = cx - dx;
			var right = cx + dx;
			var top = cy + dy;
			var bottom = cy - dy;

			if (this.view !== null && this.view.enabled) {
				var scaleW = (this.right - this.left) / this.view.fullWidth / this.zoom;
				var scaleH = (this.top - this.bottom) / this.view.fullHeight / this.zoom;
				left += scaleW * this.view.offsetX;
				right = left + scaleW * this.view.width;
				top -= scaleH * this.view.offsetY;
				bottom = top - scaleH * this.view.height;
			}

			this.projectionMatrix.makeOrthographic(left, right, top, bottom, this.near, this.far);
			this.projectionMatrixInverse.copy(this.projectionMatrix).invert();
		},
		toJSON: function toJSON(meta) {
			var data = Object3D.prototype.toJSON.call(this, meta);
			data.object.zoom = this.zoom;
			data.object.left = this.left;
			data.object.right = this.right;
			data.object.top = this.top;
			data.object.bottom = this.bottom;
			data.object.near = this.near;
			data.object.far = this.far;
			if (this.view !== null) data.object.view = Object.assign({}, this.view);
			return data;
		}
	});

	function DirectionalLightShadow() {
		LightShadow.call(this, new OrthographicCamera(-5, 5, 5, -5, 0.5, 500));
	}

	DirectionalLightShadow.prototype = Object.assign(Object.create(LightShadow.prototype), {
		constructor: DirectionalLightShadow,
		isDirectionalLightShadow: true,
		updateMatrices: function updateMatrices(light) {
			LightShadow.prototype.updateMatrices.call(this, light);
		}
	});

	function DirectionalLight(color, intensity) {
		Light.call(this, color, intensity);
		this.type = 'DirectionalLight';
		this.position.copy(Object3D.DefaultUp);
		this.updateMatrix();
		this.target = new Object3D();
		this.shadow = new DirectionalLightShadow();
	}

	DirectionalLight.prototype = Object.assign(Object.create(Light.prototype), {
		constructor: DirectionalLight,
		isDirectionalLight: true,
		copy: function copy(source) {
			Light.prototype.copy.call(this, source);
			this.target = source.target.clone();
			this.shadow = source.shadow.clone();
			return this;
		}
	});

	function AmbientLight(color, intensity) {
		Light.call(this, color, intensity);
		this.type = 'AmbientLight';
	}

	AmbientLight.prototype = Object.assign(Object.create(Light.prototype), {
		constructor: AmbientLight,
		isAmbientLight: true
	});

	function RectAreaLight(color, intensity, width, height) {
		Light.call(this, color, intensity);
		this.type = 'RectAreaLight';
		this.width = width !== undefined ? width : 10;
		this.height = height !== undefined ? height : 10;
	}

	RectAreaLight.prototype = Object.assign(Object.create(Light.prototype), {
		constructor: RectAreaLight,
		isRectAreaLight: true,
		copy: function copy(source) {
			Light.prototype.copy.call(this, source);
			this.width = source.width;
			this.height = source.height;
			return this;
		},
		toJSON: function toJSON(meta) {
			var data = Light.prototype.toJSON.call(this, meta);
			data.object.width = this.width;
			data.object.height = this.height;
			return data;
		}
	});

	/**
	 * Primary reference:
	 *	 https://graphics.stanford.edu/papers/envmap/envmap.pdf
	 *
	 * Secondary reference:
	 *	 https://www.ppsloan.org/publications/StupidSH36.pdf
	 */
	// 3-band SH defined by 9 coefficients

	var SphericalHarmonics3 = /*#__PURE__*/function () {
		function SphericalHarmonics3() {
			Object.defineProperty(this, 'isSphericalHarmonics3', {
				value: true
			});
			this.coefficients = [];

			for (var i = 0; i < 9; i++) {
				this.coefficients.push(new Vector3());
			}
		}

		var _proto = SphericalHarmonics3.prototype;

		_proto.set = function set(coefficients) {
			for (var i = 0; i < 9; i++) {
				this.coefficients[i].copy(coefficients[i]);
			}

			return this;
		};

		_proto.zero = function zero() {
			for (var i = 0; i < 9; i++) {
				this.coefficients[i].set(0, 0, 0);
			}

			return this;
		} // get the radiance in the direction of the normal
		// target is a Vector3
		;

		_proto.getAt = function getAt(normal, target) {
			// normal is assumed to be unit length
			var x = normal.x,
					y = normal.y,
					z = normal.z;
			var coeff = this.coefficients; // band 0

			target.copy(coeff[0]).multiplyScalar(0.282095); // band 1

			target.addScaledVector(coeff[1], 0.488603 * y);
			target.addScaledVector(coeff[2], 0.488603 * z);
			target.addScaledVector(coeff[3], 0.488603 * x); // band 2

			target.addScaledVector(coeff[4], 1.092548 * (x * y));
			target.addScaledVector(coeff[5], 1.092548 * (y * z));
			target.addScaledVector(coeff[6], 0.315392 * (3.0 * z * z - 1.0));
			target.addScaledVector(coeff[7], 1.092548 * (x * z));
			target.addScaledVector(coeff[8], 0.546274 * (x * x - y * y));
			return target;
		} // get the irradiance (radiance convolved with cosine lobe) in the direction of the normal
		// target is a Vector3
		// https://graphics.stanford.edu/papers/envmap/envmap.pdf
		;

		_proto.getIrradianceAt = function getIrradianceAt(normal, target) {
			// normal is assumed to be unit length
			var x = normal.x,
					y = normal.y,
					z = normal.z;
			var coeff = this.coefficients; // band 0

			target.copy(coeff[0]).multiplyScalar(0.886227); // π * 0.282095
			// band 1

			target.addScaledVector(coeff[1], 2.0 * 0.511664 * y); // ( 2 * π / 3 ) * 0.488603

			target.addScaledVector(coeff[2], 2.0 * 0.511664 * z);
			target.addScaledVector(coeff[3], 2.0 * 0.511664 * x); // band 2

			target.addScaledVector(coeff[4], 2.0 * 0.429043 * x * y); // ( π / 4 ) * 1.092548

			target.addScaledVector(coeff[5], 2.0 * 0.429043 * y * z);
			target.addScaledVector(coeff[6], 0.743125 * z * z - 0.247708); // ( π / 4 ) * 0.315392 * 3

			target.addScaledVector(coeff[7], 2.0 * 0.429043 * x * z);
			target.addScaledVector(coeff[8], 0.429043 * (x * x - y * y)); // ( π / 4 ) * 0.546274

			return target;
		};

		_proto.add = function add(sh) {
			for (var i = 0; i < 9; i++) {
				this.coefficients[i].add(sh.coefficients[i]);
			}

			return this;
		};

		_proto.addScaledSH = function addScaledSH(sh, s) {
			for (var i = 0; i < 9; i++) {
				this.coefficients[i].addScaledVector(sh.coefficients[i], s);
			}

			return this;
		};

		_proto.scale = function scale(s) {
			for (var i = 0; i < 9; i++) {
				this.coefficients[i].multiplyScalar(s);
			}

			return this;
		};

		_proto.lerp = function lerp(sh, alpha) {
			for (var i = 0; i < 9; i++) {
				this.coefficients[i].lerp(sh.coefficients[i], alpha);
			}

			return this;
		};

		_proto.equals = function equals(sh) {
			for (var i = 0; i < 9; i++) {
				if (!this.coefficients[i].equals(sh.coefficients[i])) {
					return false;
				}
			}

			return true;
		};

		_proto.copy = function copy(sh) {
			return this.set(sh.coefficients);
		};

		_proto.clone = function clone() {
			return new this.constructor().copy(this);
		};

		_proto.fromArray = function fromArray(array, offset) {
			if (offset === void 0) {
				offset = 0;
			}

			var coefficients = this.coefficients;

			for (var i = 0; i < 9; i++) {
				coefficients[i].fromArray(array, offset + i * 3);
			}

			return this;
		};

		_proto.toArray = function toArray(array, offset) {
			if (array === void 0) {
				array = [];
			}

			if (offset === void 0) {
				offset = 0;
			}

			var coefficients = this.coefficients;

			for (var i = 0; i < 9; i++) {
				coefficients[i].toArray(array, offset + i * 3);
			}

			return array;
		} // evaluate the basis functions
		// shBasis is an Array[ 9 ]
		;

		SphericalHarmonics3.getBasisAt = function getBasisAt(normal, shBasis) {
			// normal is assumed to be unit length
			var x = normal.x,
					y = normal.y,
					z = normal.z; // band 0

			shBasis[0] = 0.282095; // band 1

			shBasis[1] = 0.488603 * y;
			shBasis[2] = 0.488603 * z;
			shBasis[3] = 0.488603 * x; // band 2

			shBasis[4] = 1.092548 * x * y;
			shBasis[5] = 1.092548 * y * z;
			shBasis[6] = 0.315392 * (3 * z * z - 1);
			shBasis[7] = 1.092548 * x * z;
			shBasis[8] = 0.546274 * (x * x - y * y);
		};

		return SphericalHarmonics3;
	}();

	function LightProbe(sh, intensity) {
		Light.call(this, undefined, intensity);
		this.type = 'LightProbe';
		this.sh = sh !== undefined ? sh : new SphericalHarmonics3();
	}

	LightProbe.prototype = Object.assign(Object.create(Light.prototype), {
		constructor: LightProbe,
		isLightProbe: true,
		copy: function copy(source) {
			Light.prototype.copy.call(this, source);
			this.sh.copy(source.sh);
			return this;
		},
		fromJSON: function fromJSON(json) {
			this.intensity = json.intensity; // TODO: Move this bit to Light.fromJSON();

			this.sh.fromArray(json.sh);
			return this;
		},
		toJSON: function toJSON(meta) {
			var data = Light.prototype.toJSON.call(this, meta);
			data.object.sh = this.sh.toArray();
			return data;
		}
	});

	function MaterialLoader(manager) {
		Loader.call(this, manager);
		this.textures = {};
	}

	MaterialLoader.prototype = Object.assign(Object.create(Loader.prototype), {
		constructor: MaterialLoader,
		load: function load(url, onLoad, onProgress, onError) {
			var scope = this;
			var loader = new FileLoader(scope.manager);
			loader.setPath(scope.path);
			loader.setRequestHeader(scope.requestHeader);
			loader.setWithCredentials(scope.withCredentials);
			loader.load(url, function (text) {
				try {
					onLoad(scope.parse(JSON.parse(text)));
				} catch (e) {
					if (onError) {
						onError(e);
					} else {
						console.error(e);
					}

					scope.manager.itemError(url);
				}
			}, onProgress, onError);
		},
		parse: function parse(json) {
			var textures = this.textures;

			function getTexture(name) {
				if (textures[name] === undefined) {
					console.warn('THREE.MaterialLoader: Undefined texture', name);
				}

				return textures[name];
			}

			var material = new Materials[json.type]();
			if (json.uuid !== undefined) material.uuid = json.uuid;
			if (json.name !== undefined) material.name = json.name;
			if (json.color !== undefined && material.color !== undefined) material.color.setHex(json.color);
			if (json.roughness !== undefined) material.roughness = json.roughness;
			if (json.metalness !== undefined) material.metalness = json.metalness;
			if (json.sheen !== undefined) material.sheen = new Color().setHex(json.sheen);
			if (json.emissive !== undefined && material.emissive !== undefined) material.emissive.setHex(json.emissive);
			if (json.specular !== undefined && material.specular !== undefined) material.specular.setHex(json.specular);
			if (json.shininess !== undefined) material.shininess = json.shininess;
			if (json.clearcoat !== undefined) material.clearcoat = json.clearcoat;
			if (json.clearcoatRoughness !== undefined) material.clearcoatRoughness = json.clearcoatRoughness;
			if (json.fog !== undefined) material.fog = json.fog;
			if (json.flatShading !== undefined) material.flatShading = json.flatShading;
			if (json.blending !== undefined) material.blending = json.blending;
			if (json.combine !== undefined) material.combine = json.combine;
			if (json.side !== undefined) material.side = json.side;
			if (json.opacity !== undefined) material.opacity = json.opacity;
			if (json.transparent !== undefined) material.transparent = json.transparent;
			if (json.alphaTest !== undefined) material.alphaTest = json.alphaTest;
			if (json.depthTest !== undefined) material.depthTest = json.depthTest;
			if (json.depthWrite !== undefined) material.depthWrite = json.depthWrite;
			if (json.colorWrite !== undefined) material.colorWrite = json.colorWrite;
			if (json.stencilWrite !== undefined) material.stencilWrite = json.stencilWrite;
			if (json.stencilWriteMask !== undefined) material.stencilWriteMask = json.stencilWriteMask;
			if (json.stencilFunc !== undefined) material.stencilFunc = json.stencilFunc;
			if (json.stencilRef !== undefined) material.stencilRef = json.stencilRef;
			if (json.stencilFuncMask !== undefined) material.stencilFuncMask = json.stencilFuncMask;
			if (json.stencilFail !== undefined) material.stencilFail = json.stencilFail;
			if (json.stencilZFail !== undefined) material.stencilZFail = json.stencilZFail;
			if (json.stencilZPass !== undefined) material.stencilZPass = json.stencilZPass;
			if (json.wireframe !== undefined) material.wireframe = json.wireframe;
			if (json.wireframeLinewidth !== undefined) material.wireframeLinewidth = json.wireframeLinewidth;
			if (json.wireframeLinecap !== undefined) material.wireframeLinecap = json.wireframeLinecap;
			if (json.wireframeLinejoin !== undefined) material.wireframeLinejoin = json.wireframeLinejoin;
			if (json.rotation !== undefined) material.rotation = json.rotation;
			if (json.linewidth !== 1) material.linewidth = json.linewidth;
			if (json.dashSize !== undefined) material.dashSize = json.dashSize;
			if (json.gapSize !== undefined) material.gapSize = json.gapSize;
			if (json.scale !== undefined) material.scale = json.scale;
			if (json.polygonOffset !== undefined) material.polygonOffset = json.polygonOffset;
			if (json.polygonOffsetFactor !== undefined) material.polygonOffsetFactor = json.polygonOffsetFactor;
			if (json.polygonOffsetUnits !== undefined) material.polygonOffsetUnits = json.polygonOffsetUnits;
			if (json.skinning !== undefined) material.skinning = json.skinning;
			if (json.morphTargets !== undefined) material.morphTargets = json.morphTargets;
			if (json.morphNormals !== undefined) material.morphNormals = json.morphNormals;
			if (json.dithering !== undefined) material.dithering = json.dithering;
			if (json.vertexTangents !== undefined) material.vertexTangents = json.vertexTangents;
			if (json.visible !== undefined) material.visible = json.visible;
			if (json.toneMapped !== undefined) material.toneMapped = json.toneMapped;
			if (json.userData !== undefined) material.userData = json.userData;

			if (json.vertexColors !== undefined) {
				if (typeof json.vertexColors === 'number') {
					material.vertexColors = json.vertexColors > 0 ? true : false;
				} else {
					material.vertexColors = json.vertexColors;
				}
			} // Shader Material


			if (json.uniforms !== undefined) {
				for (var name in json.uniforms) {
					var uniform = json.uniforms[name];
					material.uniforms[name] = {};

					switch (uniform.type) {
						case 't':
							material.uniforms[name].value = getTexture(uniform.value);
							break;

						case 'c':
							material.uniforms[name].value = new Color().setHex(uniform.value);
							break;

						case 'v2':
							material.uniforms[name].value = new Vector2().fromArray(uniform.value);
							break;

						case 'v3':
							material.uniforms[name].value = new Vector3().fromArray(uniform.value);
							break;

						case 'v4':
							material.uniforms[name].value = new Vector4().fromArray(uniform.value);
							break;

						case 'm3':
							material.uniforms[name].value = new Matrix3().fromArray(uniform.value);
							break;

						case 'm4':
							material.uniforms[name].value = new Matrix4().fromArray(uniform.value);
							break;

						default:
							material.uniforms[name].value = uniform.value;
					}
				}
			}

			if (json.defines !== undefined) material.defines = json.defines;
			if (json.vertexShader !== undefined) material.vertexShader = json.vertexShader;
			if (json.fragmentShader !== undefined) material.fragmentShader = json.fragmentShader;

			if (json.extensions !== undefined) {
				for (var key in json.extensions) {
					material.extensions[key] = json.extensions[key];
				}
			} // Deprecated


			if (json.shading !== undefined) material.flatShading = json.shading === 1; // THREE.FlatShading
			// for PointsMaterial

			if (json.size !== undefined) material.size = json.size;
			if (json.sizeAttenuation !== undefined) material.sizeAttenuation = json.sizeAttenuation; // maps

			if (json.map !== undefined) material.map = getTexture(json.map);
			if (json.matcap !== undefined) material.matcap = getTexture(json.matcap);
			if (json.alphaMap !== undefined) material.alphaMap = getTexture(json.alphaMap);
			if (json.bumpMap !== undefined) material.bumpMap = getTexture(json.bumpMap);
			if (json.bumpScale !== undefined) material.bumpScale = json.bumpScale;
			if (json.normalMap !== undefined) material.normalMap = getTexture(json.normalMap);
			if (json.normalMapType !== undefined) material.normalMapType = json.normalMapType;

			if (json.normalScale !== undefined) {
				var normalScale = json.normalScale;

				if (Array.isArray(normalScale) === false) {
					// Blender exporter used to export a scalar. See #7459
					normalScale = [normalScale, normalScale];
				}

				material.normalScale = new Vector2().fromArray(normalScale);
			}

			if (json.displacementMap !== undefined) material.displacementMap = getTexture(json.displacementMap);
			if (json.displacementScale !== undefined) material.displacementScale = json.displacementScale;
			if (json.displacementBias !== undefined) material.displacementBias = json.displacementBias;
			if (json.roughnessMap !== undefined) material.roughnessMap = getTexture(json.roughnessMap);
			if (json.metalnessMap !== undefined) material.metalnessMap = getTexture(json.metalnessMap);
			if (json.emissiveMap !== undefined) material.emissiveMap = getTexture(json.emissiveMap);
			if (json.emissiveIntensity !== undefined) material.emissiveIntensity = json.emissiveIntensity;
			if (json.specularMap !== undefined) material.specularMap = getTexture(json.specularMap);
			if (json.envMap !== undefined) material.envMap = getTexture(json.envMap);
			if (json.envMapIntensity !== undefined) material.envMapIntensity = json.envMapIntensity;
			if (json.reflectivity !== undefined) material.reflectivity = json.reflectivity;
			if (json.refractionRatio !== undefined) material.refractionRatio = json.refractionRatio;
			if (json.lightMap !== undefined) material.lightMap = getTexture(json.lightMap);
			if (json.lightMapIntensity !== undefined) material.lightMapIntensity = json.lightMapIntensity;
			if (json.aoMap !== undefined) material.aoMap = getTexture(json.aoMap);
			if (json.aoMapIntensity !== undefined) material.aoMapIntensity = json.aoMapIntensity;
			if (json.gradientMap !== undefined) material.gradientMap = getTexture(json.gradientMap);
			if (json.clearcoatMap !== undefined) material.clearcoatMap = getTexture(json.clearcoatMap);
			if (json.clearcoatRoughnessMap !== undefined) material.clearcoatRoughnessMap = getTexture(json.clearcoatRoughnessMap);
			if (json.clearcoatNormalMap !== undefined) material.clearcoatNormalMap = getTexture(json.clearcoatNormalMap);
			if (json.clearcoatNormalScale !== undefined) material.clearcoatNormalScale = new Vector2().fromArray(json.clearcoatNormalScale);
			if (json.transmission !== undefined) material.transmission = json.transmission;
			if (json.transmissionMap !== undefined) material.transmissionMap = getTexture(json.transmissionMap);
			return material;
		},
		setTextures: function setTextures(value) {
			this.textures = value;
			return this;
		}
	});

	var LoaderUtils = {
		decodeText: function decodeText(array) {
			if (typeof TextDecoder !== 'undefined') {
				return new TextDecoder().decode(array);
			} // Avoid the String.fromCharCode.apply(null, array) shortcut, which
			// throws a "maximum call stack size exceeded" error for large arrays.


			var s = '';

			for (var i = 0, il = array.length; i < il; i++) {
				// Implicitly assumes little-endian.
				s += String.fromCharCode(array[i]);
			}

			try {
				// merges multi-byte utf-8 characters.
				return decodeURIComponent(escape(s));
			} catch (e) {
				// see #16358
				return s;
			}
		},
		extractUrlBase: function extractUrlBase(url) {
			var index = url.lastIndexOf('/');
			if (index === -1) return './';
			return url.substr(0, index + 1);
		}
	};

	function InstancedBufferGeometry() {
		BufferGeometry.call(this);
		this.type = 'InstancedBufferGeometry';
		this.instanceCount = Infinity;
	}

	InstancedBufferGeometry.prototype = Object.assign(Object.create(BufferGeometry.prototype), {
		constructor: InstancedBufferGeometry,
		isInstancedBufferGeometry: true,
		copy: function copy(source) {
			BufferGeometry.prototype.copy.call(this, source);
			this.instanceCount = source.instanceCount;
			return this;
		},
		clone: function clone() {
			return new this.constructor().copy(this);
		},
		toJSON: function toJSON() {
			var data = BufferGeometry.prototype.toJSON.call(this);
			data.instanceCount = this.instanceCount;
			data.isInstancedBufferGeometry = true;
			return data;
		}
	});

	function InstancedBufferAttribute(array, itemSize, normalized, meshPerAttribute) {
		if (typeof normalized === 'number') {
			meshPerAttribute = normalized;
			normalized = false;
			console.error('THREE.InstancedBufferAttribute: The constructor now expects normalized as the third argument.');
		}

		BufferAttribute.call(this, array, itemSize, normalized);
		this.meshPerAttribute = meshPerAttribute || 1;
	}

	InstancedBufferAttribute.prototype = Object.assign(Object.create(BufferAttribute.prototype), {
		constructor: InstancedBufferAttribute,
		isInstancedBufferAttribute: true,
		copy: function copy(source) {
			BufferAttribute.prototype.copy.call(this, source);
			this.meshPerAttribute = source.meshPerAttribute;
			return this;
		},
		toJSON: function toJSON() {
			var data = BufferAttribute.prototype.toJSON.call(this);
			data.meshPerAttribute = this.meshPerAttribute;
			data.isInstancedBufferAttribute = true;
			return data;
		}
	});

	function BufferGeometryLoader(manager) {
		Loader.call(this, manager);
	}

	BufferGeometryLoader.prototype = Object.assign(Object.create(Loader.prototype), {
		constructor: BufferGeometryLoader,
		load: function load(url, onLoad, onProgress, onError) {
			var scope = this;
			var loader = new FileLoader(scope.manager);
			loader.setPath(scope.path);
			loader.setRequestHeader(scope.requestHeader);
			loader.setWithCredentials(scope.withCredentials);
			loader.load(url, function (text) {
				try {
					onLoad(scope.parse(JSON.parse(text)));
				} catch (e) {
					if (onError) {
						onError(e);
					} else {
						console.error(e);
					}

					scope.manager.itemError(url);
				}
			}, onProgress, onError);
		},
		parse: function parse(json) {
			var interleavedBufferMap = {};
			var arrayBufferMap = {};

			function getInterleavedBuffer(json, uuid) {
				if (interleavedBufferMap[uuid] !== undefined) return interleavedBufferMap[uuid];
				var interleavedBuffers = json.interleavedBuffers;
				var interleavedBuffer = interleavedBuffers[uuid];
				var buffer = getArrayBuffer(json, interleavedBuffer.buffer);
				var array = getTypedArray(interleavedBuffer.type, buffer);
				var ib = new InterleavedBuffer(array, interleavedBuffer.stride);
				ib.uuid = interleavedBuffer.uuid;
				interleavedBufferMap[uuid] = ib;
				return ib;
			}

			function getArrayBuffer(json, uuid) {
				if (arrayBufferMap[uuid] !== undefined) return arrayBufferMap[uuid];
				var arrayBuffers = json.arrayBuffers;
				var arrayBuffer = arrayBuffers[uuid];
				var ab = new Uint32Array(arrayBuffer).buffer;
				arrayBufferMap[uuid] = ab;
				return ab;
			}

			var geometry = json.isInstancedBufferGeometry ? new InstancedBufferGeometry() : new BufferGeometry();
			var index = json.data.index;

			if (index !== undefined) {
				var typedArray = getTypedArray(index.type, index.array);
				geometry.setIndex(new BufferAttribute(typedArray, 1));
			}

			var attributes = json.data.attributes;

			for (var key in attributes) {
				var attribute = attributes[key];
				var bufferAttribute = void 0;

				if (attribute.isInterleavedBufferAttribute) {
					var interleavedBuffer = getInterleavedBuffer(json.data, attribute.data);
					bufferAttribute = new InterleavedBufferAttribute(interleavedBuffer, attribute.itemSize, attribute.offset, attribute.normalized);
				} else {
					var _typedArray = getTypedArray(attribute.type, attribute.array);

					var bufferAttributeConstr = attribute.isInstancedBufferAttribute ? InstancedBufferAttribute : BufferAttribute;
					bufferAttribute = new bufferAttributeConstr(_typedArray, attribute.itemSize, attribute.normalized);
				}

				if (attribute.name !== undefined) bufferAttribute.name = attribute.name;
				geometry.setAttribute(key, bufferAttribute);
			}

			var morphAttributes = json.data.morphAttributes;

			if (morphAttributes) {
				for (var _key in morphAttributes) {
					var attributeArray = morphAttributes[_key];
					var array = [];

					for (var i = 0, il = attributeArray.length; i < il; i++) {
						var _attribute = attributeArray[i];

						var _bufferAttribute = void 0;

						if (_attribute.isInterleavedBufferAttribute) {
							var _interleavedBuffer = getInterleavedBuffer(json.data, _attribute.data);

							_bufferAttribute = new InterleavedBufferAttribute(_interleavedBuffer, _attribute.itemSize, _attribute.offset, _attribute.normalized);
						} else {
							var _typedArray2 = getTypedArray(_attribute.type, _attribute.array);

							_bufferAttribute = new BufferAttribute(_typedArray2, _attribute.itemSize, _attribute.normalized);
						}

						if (_attribute.name !== undefined) _bufferAttribute.name = _attribute.name;
						array.push(_bufferAttribute);
					}

					geometry.morphAttributes[_key] = array;
				}
			}

			var morphTargetsRelative = json.data.morphTargetsRelative;

			if (morphTargetsRelative) {
				geometry.morphTargetsRelative = true;
			}

			var groups = json.data.groups || json.data.drawcalls || json.data.offsets;

			if (groups !== undefined) {
				for (var _i = 0, n = groups.length; _i !== n; ++_i) {
					var group = groups[_i];
					geometry.addGroup(group.start, group.count, group.materialIndex);
				}
			}

			var boundingSphere = json.data.boundingSphere;

			if (boundingSphere !== undefined) {
				var center = new Vector3();

				if (boundingSphere.center !== undefined) {
					center.fromArray(boundingSphere.center);
				}

				geometry.boundingSphere = new Sphere(center, boundingSphere.radius);
			}

			if (json.name) geometry.name = json.name;
			if (json.userData) geometry.userData = json.userData;
			return geometry;
		}
	});

	var ObjectLoader = /*#__PURE__*/function (_Loader) {
		_inheritsLoose(ObjectLoader, _Loader);

		function ObjectLoader(manager) {
			return _Loader.call(this, manager) || this;
		}

		var _proto = ObjectLoader.prototype;

		_proto.load = function load(url, onLoad, onProgress, onError) {
			var scope = this;
			var path = this.path === '' ? LoaderUtils.extractUrlBase(url) : this.path;
			this.resourcePath = this.resourcePath || path;
			var loader = new FileLoader(this.manager);
			loader.setPath(this.path);
			loader.setRequestHeader(this.requestHeader);
			loader.setWithCredentials(this.withCredentials);
			loader.load(url, function (text) {
				var json = null;

				try {
					json = JSON.parse(text);
				} catch (error) {
					if (onError !== undefined) onError(error);
					console.error('THREE:ObjectLoader: Can\'t parse ' + url + '.', error.message);
					return;
				}

				var metadata = json.metadata;

				if (metadata === undefined || metadata.type === undefined || metadata.type.toLowerCase() === 'geometry') {
					console.error('THREE.ObjectLoader: Can\'t load ' + url);
					return;
				}

				scope.parse(json, onLoad);
			}, onProgress, onError);
		};

		_proto.parse = function parse(json, onLoad) {
			var animations = this.parseAnimations(json.animations);
			var shapes = this.parseShapes(json.shapes);
			var geometries = this.parseGeometries(json.geometries, shapes);
			var images = this.parseImages(json.images, function () {
				if (onLoad !== undefined) onLoad(object);
			});
			var textures = this.parseTextures(json.textures, images);
			var materials = this.parseMaterials(json.materials, textures);
			var object = this.parseObject(json.object, geometries, materials, animations);
			var skeletons = this.parseSkeletons(json.skeletons, object);
			this.bindSkeletons(object, skeletons); //

			if (onLoad !== undefined) {
				var hasImages = false;

				for (var uuid in images) {
					if (images[uuid] instanceof HTMLImageElement) {
						hasImages = true;
						break;
					}
				}

				if (hasImages === false) onLoad(object);
			}

			return object;
		};

		_proto.parseShapes = function parseShapes(json) {
			var shapes = {};

			if (json !== undefined) {
				for (var i = 0, l = json.length; i < l; i++) {
					var shape = new Shape().fromJSON(json[i]);
					shapes[shape.uuid] = shape;
				}
			}

			return shapes;
		};

		_proto.parseSkeletons = function parseSkeletons(json, object) {
			var skeletons = {};
			var bones = {}; // generate bone lookup table

			object.traverse(function (child) {
				if (child.isBone) bones[child.uuid] = child;
			}); // create skeletons

			if (json !== undefined) {
				for (var i = 0, l = json.length; i < l; i++) {
					var skeleton = new Skeleton().fromJSON(json[i], bones);
					skeletons[skeleton.uuid] = skeleton;
				}
			}

			return skeletons;
		};

		_proto.parseGeometries = function parseGeometries(json, shapes) {
			var geometries = {};
			var geometryShapes;

			if (json !== undefined) {
				var bufferGeometryLoader = new BufferGeometryLoader();

				for (var i = 0, l = json.length; i < l; i++) {
					var geometry = void 0;
					var data = json[i];

					switch (data.type) {
						case 'PlaneGeometry':
						case 'PlaneBufferGeometry':
							geometry = new Geometries[data.type](data.width, data.height, data.widthSegments, data.heightSegments);
							break;

						case 'BoxGeometry':
						case 'BoxBufferGeometry':
							geometry = new Geometries[data.type](data.width, data.height, data.depth, data.widthSegments, data.heightSegments, data.depthSegments);
							break;

						case 'CircleGeometry':
						case 'CircleBufferGeometry':
							geometry = new Geometries[data.type](data.radius, data.segments, data.thetaStart, data.thetaLength);
							break;

						case 'CylinderGeometry':
						case 'CylinderBufferGeometry':
							geometry = new Geometries[data.type](data.radiusTop, data.radiusBottom, data.height, data.radialSegments, data.heightSegments, data.openEnded, data.thetaStart, data.thetaLength);
							break;

						case 'ConeGeometry':
						case 'ConeBufferGeometry':
							geometry = new Geometries[data.type](data.radius, data.height, data.radialSegments, data.heightSegments, data.openEnded, data.thetaStart, data.thetaLength);
							break;

						case 'SphereGeometry':
						case 'SphereBufferGeometry':
							geometry = new Geometries[data.type](data.radius, data.widthSegments, data.heightSegments, data.phiStart, data.phiLength, data.thetaStart, data.thetaLength);
							break;

						case 'DodecahedronGeometry':
						case 'DodecahedronBufferGeometry':
						case 'IcosahedronGeometry':
						case 'IcosahedronBufferGeometry':
						case 'OctahedronGeometry':
						case 'OctahedronBufferGeometry':
						case 'TetrahedronGeometry':
						case 'TetrahedronBufferGeometry':
							geometry = new Geometries[data.type](data.radius, data.detail);
							break;

						case 'RingGeometry':
						case 'RingBufferGeometry':
							geometry = new Geometries[data.type](data.innerRadius, data.outerRadius, data.thetaSegments, data.phiSegments, data.thetaStart, data.thetaLength);
							break;

						case 'TorusGeometry':
						case 'TorusBufferGeometry':
							geometry = new Geometries[data.type](data.radius, data.tube, data.radialSegments, data.tubularSegments, data.arc);
							break;

						case 'TorusKnotGeometry':
						case 'TorusKnotBufferGeometry':
							geometry = new Geometries[data.type](data.radius, data.tube, data.tubularSegments, data.radialSegments, data.p, data.q);
							break;

						case 'TubeGeometry':
						case 'TubeBufferGeometry':
							// This only works for built-in curves (e.g. CatmullRomCurve3).
							// User defined curves or instances of CurvePath will not be deserialized.
							geometry = new Geometries[data.type](new Curves[data.path.type]().fromJSON(data.path), data.tubularSegments, data.radius, data.radialSegments, data.closed);
							break;

						case 'LatheGeometry':
						case 'LatheBufferGeometry':
							geometry = new Geometries[data.type](data.points, data.segments, data.phiStart, data.phiLength);
							break;

						case 'PolyhedronGeometry':
						case 'PolyhedronBufferGeometry':
							geometry = new Geometries[data.type](data.vertices, data.indices, data.radius, data.details);
							break;

						case 'ShapeGeometry':
						case 'ShapeBufferGeometry':
							geometryShapes = [];

							for (var j = 0, jl = data.shapes.length; j < jl; j++) {
								var shape = shapes[data.shapes[j]];
								geometryShapes.push(shape);
							}

							geometry = new Geometries[data.type](geometryShapes, data.curveSegments);
							break;

						case 'ExtrudeGeometry':
						case 'ExtrudeBufferGeometry':
							geometryShapes = [];

							for (var _j = 0, _jl = data.shapes.length; _j < _jl; _j++) {
								var _shape = shapes[data.shapes[_j]];
								geometryShapes.push(_shape);
							}

							var extrudePath = data.options.extrudePath;

							if (extrudePath !== undefined) {
								data.options.extrudePath = new Curves[extrudePath.type]().fromJSON(extrudePath);
							}

							geometry = new Geometries[data.type](geometryShapes, data.options);
							break;

						case 'BufferGeometry':
						case 'InstancedBufferGeometry':
							geometry = bufferGeometryLoader.parse(data);
							break;

						case 'Geometry':
							if ('THREE' in window && 'LegacyJSONLoader' in THREE) {
								var geometryLoader = new THREE.LegacyJSONLoader();
								geometry = geometryLoader.parse(data, this.resourcePath).geometry;
							} else {
								console.error('THREE.ObjectLoader: You have to import LegacyJSONLoader in order load geometry data of type "Geometry".');
							}

							break;

						default:
							console.warn('THREE.ObjectLoader: Unsupported geometry type "' + data.type + '"');
							continue;
					}

					geometry.uuid = data.uuid;
					if (data.name !== undefined) geometry.name = data.name;
					if (geometry.isBufferGeometry === true && data.userData !== undefined) geometry.userData = data.userData;
					geometries[data.uuid] = geometry;
				}
			}

			return geometries;
		};

		_proto.parseMaterials = function parseMaterials(json, textures) {
			var cache = {}; // MultiMaterial

			var materials = {};

			if (json !== undefined) {
				var loader = new MaterialLoader();
				loader.setTextures(textures);

				for (var i = 0, l = json.length; i < l; i++) {
					var data = json[i];

					if (data.type === 'MultiMaterial') {
						// Deprecated
						var array = [];

						for (var j = 0; j < data.materials.length; j++) {
							var material = data.materials[j];

							if (cache[material.uuid] === undefined) {
								cache[material.uuid] = loader.parse(material);
							}

							array.push(cache[material.uuid]);
						}

						materials[data.uuid] = array;
					} else {
						if (cache[data.uuid] === undefined) {
							cache[data.uuid] = loader.parse(data);
						}

						materials[data.uuid] = cache[data.uuid];
					}
				}
			}

			return materials;
		};

		_proto.parseAnimations = function parseAnimations(json) {
			var animations = {};

			if (json !== undefined) {
				for (var i = 0; i < json.length; i++) {
					var data = json[i];
					var clip = AnimationClip.parse(data);
					animations[clip.uuid] = clip;
				}
			}

			return animations;
		};

		_proto.parseImages = function parseImages(json, onLoad) {
			var scope = this;
			var images = {};
			var loader;

			function loadImage(url) {
				scope.manager.itemStart(url);
				return loader.load(url, function () {
					scope.manager.itemEnd(url);
				}, undefined, function () {
					scope.manager.itemError(url);
					scope.manager.itemEnd(url);
				});
			}

			function deserializeImage(image) {
				if (typeof image === 'string') {
					var url = image;
					var path = /^(\/\/)|([a-z]+:(\/\/)?)/i.test(url) ? url : scope.resourcePath + url;
					return loadImage(path);
				} else {
					if (image.data) {
						return {
							data: getTypedArray(image.type, image.data),
							width: image.width,
							height: image.height
						};
					} else {
						return null;
					}
				}
			}

			if (json !== undefined && json.length > 0) {
				var manager = new LoadingManager(onLoad);
				loader = new ImageLoader(manager);
				loader.setCrossOrigin(this.crossOrigin);

				for (var i = 0, il = json.length; i < il; i++) {
					var image = json[i];
					var url = image.url;

					if (Array.isArray(url)) {
						// load array of images e.g CubeTexture
						images[image.uuid] = [];

						for (var j = 0, jl = url.length; j < jl; j++) {
							var currentUrl = url[j];
							var deserializedImage = deserializeImage(currentUrl);

							if (deserializedImage !== null) {
								if (deserializedImage instanceof HTMLImageElement) {
									images[image.uuid].push(deserializedImage);
								} else {
									// special case: handle array of data textures for cube textures
									images[image.uuid].push(new DataTexture(deserializedImage.data, deserializedImage.width, deserializedImage.height));
								}
							}
						}
					} else {
						// load single image
						var _deserializedImage = deserializeImage(image.url);

						if (_deserializedImage !== null) {
							images[image.uuid] = _deserializedImage;
						}
					}
				}
			}

			return images;
		};

		_proto.parseTextures = function parseTextures(json, images) {
			function parseConstant(value, type) {
				if (typeof value === 'number') return value;
				console.warn('THREE.ObjectLoader.parseTexture: Constant should be in numeric form.', value);
				return type[value];
			}

			var textures = {};

			if (json !== undefined) {
				for (var i = 0, l = json.length; i < l; i++) {
					var data = json[i];

					if (data.image === undefined) {
						console.warn('THREE.ObjectLoader: No "image" specified for', data.uuid);
					}

					if (images[data.image] === undefined) {
						console.warn('THREE.ObjectLoader: Undefined image', data.image);
					}

					var texture = void 0;
					var image = images[data.image];

					if (Array.isArray(image)) {
						texture = new CubeTexture(image);
						if (image.length === 6) texture.needsUpdate = true;
					} else {
						if (image && image.data) {
							texture = new DataTexture(image.data, image.width, image.height);
						} else {
							texture = new Texture(image);
						}

						if (image) texture.needsUpdate = true; // textures can have undefined image data
					}

					texture.uuid = data.uuid;
					if (data.name !== undefined) texture.name = data.name;
					if (data.mapping !== undefined) texture.mapping = parseConstant(data.mapping, TEXTURE_MAPPING);
					if (data.offset !== undefined) texture.offset.fromArray(data.offset);
					if (data.repeat !== undefined) texture.repeat.fromArray(data.repeat);
					if (data.center !== undefined) texture.center.fromArray(data.center);
					if (data.rotation !== undefined) texture.rotation = data.rotation;

					if (data.wrap !== undefined) {
						texture.wrapS = parseConstant(data.wrap[0], TEXTURE_WRAPPING);
						texture.wrapT = parseConstant(data.wrap[1], TEXTURE_WRAPPING);
					}

					if (data.format !== undefined) texture.format = data.format;
					if (data.type !== undefined) texture.type = data.type;
					if (data.encoding !== undefined) texture.encoding = data.encoding;
					if (data.minFilter !== undefined) texture.minFilter = parseConstant(data.minFilter, TEXTURE_FILTER);
					if (data.magFilter !== undefined) texture.magFilter = parseConstant(data.magFilter, TEXTURE_FILTER);
					if (data.anisotropy !== undefined) texture.anisotropy = data.anisotropy;
					if (data.flipY !== undefined) texture.flipY = data.flipY;
					if (data.premultiplyAlpha !== undefined) texture.premultiplyAlpha = data.premultiplyAlpha;
					if (data.unpackAlignment !== undefined) texture.unpackAlignment = data.unpackAlignment;
					textures[data.uuid] = texture;
				}
			}

			return textures;
		};

		_proto.parseObject = function parseObject(data, geometries, materials, animations) {
			var object;

			function getGeometry(name) {
				if (geometries[name] === undefined) {
					console.warn('THREE.ObjectLoader: Undefined geometry', name);
				}

				return geometries[name];
			}

			function getMaterial(name) {
				if (name === undefined) return undefined;

				if (Array.isArray(name)) {
					var array = [];

					for (var i = 0, l = name.length; i < l; i++) {
						var uuid = name[i];

						if (materials[uuid] === undefined) {
							console.warn('THREE.ObjectLoader: Undefined material', uuid);
						}

						array.push(materials[uuid]);
					}

					return array;
				}

				if (materials[name] === undefined) {
					console.warn('THREE.ObjectLoader: Undefined material', name);
				}

				return materials[name];
			}

			var geometry, material;

			switch (data.type) {
				case 'Scene':
					object = new Scene();

					if (data.background !== undefined) {
						if (Number.isInteger(data.background)) {
							object.background = new Color(data.background);
						}
					}

					if (data.fog !== undefined) {
						if (data.fog.type === 'Fog') {
							object.fog = new Fog(data.fog.color, data.fog.near, data.fog.far);
						} else if (data.fog.type === 'FogExp2') {
							object.fog = new FogExp2(data.fog.color, data.fog.density);
						}
					}

					break;

				case 'PerspectiveCamera':
					object = new PerspectiveCamera(data.fov, data.aspect, data.near, data.far);
					if (data.focus !== undefined) object.focus = data.focus;
					if (data.zoom !== undefined) object.zoom = data.zoom;
					if (data.filmGauge !== undefined) object.filmGauge = data.filmGauge;
					if (data.filmOffset !== undefined) object.filmOffset = data.filmOffset;
					if (data.view !== undefined) object.view = Object.assign({}, data.view);
					break;

				case 'OrthographicCamera':
					object = new OrthographicCamera(data.left, data.right, data.top, data.bottom, data.near, data.far);
					if (data.zoom !== undefined) object.zoom = data.zoom;
					if (data.view !== undefined) object.view = Object.assign({}, data.view);
					break;

				case 'AmbientLight':
					object = new AmbientLight(data.color, data.intensity);
					break;

				case 'DirectionalLight':
					object = new DirectionalLight(data.color, data.intensity);
					break;

				case 'PointLight':
					object = new PointLight(data.color, data.intensity, data.distance, data.decay);
					break;

				case 'RectAreaLight':
					object = new RectAreaLight(data.color, data.intensity, data.width, data.height);
					break;

				case 'SpotLight':
					object = new SpotLight(data.color, data.intensity, data.distance, data.angle, data.penumbra, data.decay);
					break;

				case 'HemisphereLight':
					object = new HemisphereLight(data.color, data.groundColor, data.intensity);
					break;

				case 'LightProbe':
					object = new LightProbe().fromJSON(data);
					break;

				case 'SkinnedMesh':
					geometry = getGeometry(data.geometry);
					material = getMaterial(data.material);
					object = new SkinnedMesh(geometry, material);
					if (data.bindMode !== undefined) object.bindMode = data.bindMode;
					if (data.bindMatrix !== undefined) object.bindMatrix.fromArray(data.bindMatrix);
					if (data.skeleton !== undefined) object.skeleton = data.skeleton;
					break;

				case 'Mesh':
					geometry = getGeometry(data.geometry);
					material = getMaterial(data.material);
					object = new Mesh(geometry, material);
					break;

				case 'InstancedMesh':
					geometry = getGeometry(data.geometry);
					material = getMaterial(data.material);
					var count = data.count;
					var instanceMatrix = data.instanceMatrix;
					object = new InstancedMesh(geometry, material, count);
					object.instanceMatrix = new BufferAttribute(new Float32Array(instanceMatrix.array), 16);
					break;

				case 'LOD':
					object = new LOD();
					break;

				case 'Line':
					object = new Line(getGeometry(data.geometry), getMaterial(data.material));
					break;

				case 'LineLoop':
					object = new LineLoop(getGeometry(data.geometry), getMaterial(data.material));
					break;

				case 'LineSegments':
					object = new LineSegments(getGeometry(data.geometry), getMaterial(data.material));
					break;

				case 'PointCloud':
				case 'Points':
					object = new Points(getGeometry(data.geometry), getMaterial(data.material));
					break;

				case 'Sprite':
					object = new Sprite(getMaterial(data.material));
					break;

				case 'Group':
					object = new Group();
					break;

				case 'Bone':
					object = new Bone();
					break;

				default:
					object = new Object3D();
			}

			object.uuid = data.uuid;
			if (data.name !== undefined) object.name = data.name;

			if (data.matrix !== undefined) {
				object.matrix.fromArray(data.matrix);
				if (data.matrixAutoUpdate !== undefined) object.matrixAutoUpdate = data.matrixAutoUpdate;
				if (object.matrixAutoUpdate) object.matrix.decompose(object.position, object.quaternion, object.scale);
			} else {
				if (data.position !== undefined) object.position.fromArray(data.position);
				if (data.rotation !== undefined) object.rotation.fromArray(data.rotation);
				if (data.quaternion !== undefined) object.quaternion.fromArray(data.quaternion);
				if (data.scale !== undefined) object.scale.fromArray(data.scale);
			}

			if (data.castShadow !== undefined) object.castShadow = data.castShadow;
			if (data.receiveShadow !== undefined) object.receiveShadow = data.receiveShadow;

			if (data.shadow) {
				if (data.shadow.bias !== undefined) object.shadow.bias = data.shadow.bias;
				if (data.shadow.normalBias !== undefined) object.shadow.normalBias = data.shadow.normalBias;
				if (data.shadow.radius !== undefined) object.shadow.radius = data.shadow.radius;
				if (data.shadow.mapSize !== undefined) object.shadow.mapSize.fromArray(data.shadow.mapSize);
				if (data.shadow.camera !== undefined) object.shadow.camera = this.parseObject(data.shadow.camera);
			}

			if (data.visible !== undefined) object.visible = data.visible;
			if (data.frustumCulled !== undefined) object.frustumCulled = data.frustumCulled;
			if (data.renderOrder !== undefined) object.renderOrder = data.renderOrder;
			if (data.userData !== undefined) object.userData = data.userData;
			if (data.layers !== undefined) object.layers.mask = data.layers;

			if (data.children !== undefined) {
				var children = data.children;

				for (var i = 0; i < children.length; i++) {
					object.add(this.parseObject(children[i], geometries, materials, animations));
				}
			}

			if (data.animations !== undefined) {
				var objectAnimations = data.animations;

				for (var _i = 0; _i < objectAnimations.length; _i++) {
					var uuid = objectAnimations[_i];
					object.animations.push(animations[uuid]);
				}
			}

			if (data.type === 'LOD') {
				if (data.autoUpdate !== undefined) object.autoUpdate = data.autoUpdate;
				var levels = data.levels;

				for (var l = 0; l < levels.length; l++) {
					var level = levels[l];
					var child = object.getObjectByProperty('uuid', level.object);

					if (child !== undefined) {
						object.addLevel(child, level.distance);
					}
				}
			}

			return object;
		};

		_proto.bindSkeletons = function bindSkeletons(object, skeletons) {
			if (Object.keys(skeletons).length === 0) return;
			object.traverse(function (child) {
				if (child.isSkinnedMesh === true && child.skeleton !== undefined) {
					var skeleton = skeletons[child.skeleton];

					if (skeleton === undefined) {
						console.warn('THREE.ObjectLoader: No skeleton found with UUID:', child.skeleton);
					} else {
						child.bind(skeleton, child.bindMatrix);
					}
				}
			});
		}
		/* DEPRECATED */
		;

		_proto.setTexturePath = function setTexturePath(value) {
			console.warn('THREE.ObjectLoader: .setTexturePath() has been renamed to .setResourcePath().');
			return this.setResourcePath(value);
		};

		return ObjectLoader;
	}(Loader);

	var TEXTURE_MAPPING = {
		UVMapping: UVMapping,
		CubeReflectionMapping: CubeReflectionMapping,
		CubeRefractionMapping: CubeRefractionMapping,
		EquirectangularReflectionMapping: EquirectangularReflectionMapping,
		EquirectangularRefractionMapping: EquirectangularRefractionMapping,
		CubeUVReflectionMapping: CubeUVReflectionMapping,
		CubeUVRefractionMapping: CubeUVRefractionMapping
	};
	var TEXTURE_WRAPPING = {
		RepeatWrapping: RepeatWrapping,
		ClampToEdgeWrapping: ClampToEdgeWrapping,
		MirroredRepeatWrapping: MirroredRepeatWrapping
	};
	var TEXTURE_FILTER = {
		NearestFilter: NearestFilter,
		NearestMipmapNearestFilter: NearestMipmapNearestFilter,
		NearestMipmapLinearFilter: NearestMipmapLinearFilter,
		LinearFilter: LinearFilter,
		LinearMipmapNearestFilter: LinearMipmapNearestFilter,
		LinearMipmapLinearFilter: LinearMipmapLinearFilter
	};

	function ImageBitmapLoader(manager) {
		if (typeof createImageBitmap === 'undefined') {
			console.warn('THREE.ImageBitmapLoader: createImageBitmap() not supported.');
		}

		if (typeof fetch === 'undefined') {
			console.warn('THREE.ImageBitmapLoader: fetch() not supported.');
		}

		Loader.call(this, manager);
		this.options = {
			premultiplyAlpha: 'none'
		};
	}

	ImageBitmapLoader.prototype = Object.assign(Object.create(Loader.prototype), {
		constructor: ImageBitmapLoader,
		isImageBitmapLoader: true,
		setOptions: function setOptions(options) {
			this.options = options;
			return this;
		},
		load: function load(url, onLoad, onProgress, onError) {
			if (url === undefined) url = '';
			if (this.path !== undefined) url = this.path + url;
			url = this.manager.resolveURL(url);
			var scope = this;
			var cached = Cache.get(url);

			if (cached !== undefined) {
				scope.manager.itemStart(url);
				setTimeout(function () {
					if (onLoad) onLoad(cached);
					scope.manager.itemEnd(url);
				}, 0);
				return cached;
			}

			var fetchOptions = {};
			fetchOptions.credentials = this.crossOrigin === 'anonymous' ? 'same-origin' : 'include';
			fetch(url, fetchOptions).then(function (res) {
				return res.blob();
			}).then(function (blob) {
				return createImageBitmap(blob, scope.options);
			}).then(function (imageBitmap) {
				Cache.add(url, imageBitmap);
				if (onLoad) onLoad(imageBitmap);
				scope.manager.itemEnd(url);
			}).catch(function (e) {
				if (onError) onError(e);
				scope.manager.itemError(url);
				scope.manager.itemEnd(url);
			});
			scope.manager.itemStart(url);
		}
	});

	function ShapePath() {
		this.type = 'ShapePath';
		this.color = new Color();
		this.subPaths = [];
		this.currentPath = null;
	}

	Object.assign(ShapePath.prototype, {
		moveTo: function moveTo(x, y) {
			this.currentPath = new Path();
			this.subPaths.push(this.currentPath);
			this.currentPath.moveTo(x, y);
			return this;
		},
		lineTo: function lineTo(x, y) {
			this.currentPath.lineTo(x, y);
			return this;
		},
		quadraticCurveTo: function quadraticCurveTo(aCPx, aCPy, aX, aY) {
			this.currentPath.quadraticCurveTo(aCPx, aCPy, aX, aY);
			return this;
		},
		bezierCurveTo: function bezierCurveTo(aCP1x, aCP1y, aCP2x, aCP2y, aX, aY) {
			this.currentPath.bezierCurveTo(aCP1x, aCP1y, aCP2x, aCP2y, aX, aY);
			return this;
		},
		splineThru: function splineThru(pts) {
			this.currentPath.splineThru(pts);
			return this;
		},
		toShapes: function toShapes(isCCW, noHoles) {
			function toShapesNoHoles(inSubpaths) {
				var shapes = [];

				for (var i = 0, l = inSubpaths.length; i < l; i++) {
					var _tmpPath = inSubpaths[i];

					var _tmpShape = new Shape();

					_tmpShape.curves = _tmpPath.curves;
					shapes.push(_tmpShape);
				}

				return shapes;
			}

			function isPointInsidePolygon(inPt, inPolygon) {
				var polyLen = inPolygon.length; // inPt on polygon contour => immediate success		or
				// toggling of inside/outside at every single! intersection point of an edge
				//	with the horizontal line through inPt, left of inPt
				//	not counting lowerY endpoints of edges and whole edges on that line

				var inside = false;

				for (var p = polyLen - 1, q = 0; q < polyLen; p = q++) {
					var edgeLowPt = inPolygon[p];
					var edgeHighPt = inPolygon[q];
					var edgeDx = edgeHighPt.x - edgeLowPt.x;
					var edgeDy = edgeHighPt.y - edgeLowPt.y;

					if (Math.abs(edgeDy) > Number.EPSILON) {
						// not parallel
						if (edgeDy < 0) {
							edgeLowPt = inPolygon[q];
							edgeDx = -edgeDx;
							edgeHighPt = inPolygon[p];
							edgeDy = -edgeDy;
						}

						if (inPt.y < edgeLowPt.y || inPt.y > edgeHighPt.y) continue;

						if (inPt.y === edgeLowPt.y) {
							if (inPt.x === edgeLowPt.x) return true; // inPt is on contour ?
							// continue;				// no intersection or edgeLowPt => doesn't count !!!
						} else {
							var perpEdge = edgeDy * (inPt.x - edgeLowPt.x) - edgeDx * (inPt.y - edgeLowPt.y);
							if (perpEdge === 0) return true; // inPt is on contour ?

							if (perpEdge < 0) continue;
							inside = !inside; // true intersection left of inPt
						}
					} else {
						// parallel or collinear
						if (inPt.y !== edgeLowPt.y) continue; // parallel
						// edge lies on the same horizontal line as inPt

						if (edgeHighPt.x <= inPt.x && inPt.x <= edgeLowPt.x || edgeLowPt.x <= inPt.x && inPt.x <= edgeHighPt.x) return true; // inPt: Point on contour !
						// continue;
					}
				}

				return inside;
			}

			var isClockWise = ShapeUtils.isClockWise;
			var subPaths = this.subPaths;
			if (subPaths.length === 0) return [];
			if (noHoles === true) return toShapesNoHoles(subPaths);
			var solid, tmpPath, tmpShape;
			var shapes = [];

			if (subPaths.length === 1) {
				tmpPath = subPaths[0];
				tmpShape = new Shape();
				tmpShape.curves = tmpPath.curves;
				shapes.push(tmpShape);
				return shapes;
			}

			var holesFirst = !isClockWise(subPaths[0].getPoints());
			holesFirst = isCCW ? !holesFirst : holesFirst; // console.log("Holes first", holesFirst);

			var betterShapeHoles = [];
			var newShapes = [];
			var newShapeHoles = [];
			var mainIdx = 0;
			var tmpPoints;
			newShapes[mainIdx] = undefined;
			newShapeHoles[mainIdx] = [];

			for (var i = 0, l = subPaths.length; i < l; i++) {
				tmpPath = subPaths[i];
				tmpPoints = tmpPath.getPoints();
				solid = isClockWise(tmpPoints);
				solid = isCCW ? !solid : solid;

				if (solid) {
					if (!holesFirst && newShapes[mainIdx]) mainIdx++;
					newShapes[mainIdx] = {
						s: new Shape(),
						p: tmpPoints
					};
					newShapes[mainIdx].s.curves = tmpPath.curves;
					if (holesFirst) mainIdx++;
					newShapeHoles[mainIdx] = []; //console.log('cw', i);
				} else {
					newShapeHoles[mainIdx].push({
						h: tmpPath,
						p: tmpPoints[0]
					}); //console.log('ccw', i);
				}
			} // only Holes? -> probably all Shapes with wrong orientation


			if (!newShapes[0]) return toShapesNoHoles(subPaths);

			if (newShapes.length > 1) {
				var ambiguous = false;
				var toChange = [];

				for (var sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx++) {
					betterShapeHoles[sIdx] = [];
				}

				for (var _sIdx = 0, _sLen = newShapes.length; _sIdx < _sLen; _sIdx++) {
					var sho = newShapeHoles[_sIdx];

					for (var hIdx = 0; hIdx < sho.length; hIdx++) {
						var ho = sho[hIdx];
						var hole_unassigned = true;

						for (var s2Idx = 0; s2Idx < newShapes.length; s2Idx++) {
							if (isPointInsidePolygon(ho.p, newShapes[s2Idx].p)) {
								if (_sIdx !== s2Idx) toChange.push({
									froms: _sIdx,
									tos: s2Idx,
									hole: hIdx
								});

								if (hole_unassigned) {
									hole_unassigned = false;
									betterShapeHoles[s2Idx].push(ho);
								} else {
									ambiguous = true;
								}
							}
						}

						if (hole_unassigned) {
							betterShapeHoles[_sIdx].push(ho);
						}
					}
				} // console.log("ambiguous: ", ambiguous);


				if (toChange.length > 0) {
					// console.log("to change: ", toChange);
					if (!ambiguous) newShapeHoles = betterShapeHoles;
				}
			}

			var tmpHoles;

			for (var _i = 0, il = newShapes.length; _i < il; _i++) {
				tmpShape = newShapes[_i].s;
				shapes.push(tmpShape);
				tmpHoles = newShapeHoles[_i];

				for (var j = 0, jl = tmpHoles.length; j < jl; j++) {
					tmpShape.holes.push(tmpHoles[j].h);
				}
			} //console.log("shape", shapes);


			return shapes;
		}
	});

	var Font = /*#__PURE__*/function () {
		function Font(data) {
			Object.defineProperty(this, 'isFont', {
				value: true
			});
			this.type = 'Font';
			this.data = data;
		}

		var _proto = Font.prototype;

		_proto.generateShapes = function generateShapes(text, size) {
			if (size === void 0) {
				size = 100;
			}

			var shapes = [];
			var paths = createPaths(text, size, this.data);

			for (var p = 0, pl = paths.length; p < pl; p++) {
				Array.prototype.push.apply(shapes, paths[p].toShapes());
			}

			return shapes;
		};

		return Font;
	}();

	function createPaths(text, size, data) {
		var chars = Array.from ? Array.from(text) : String(text).split(''); // workaround for IE11, see #13988

		var scale = size / data.resolution;
		var line_height = (data.boundingBox.yMax - data.boundingBox.yMin + data.underlineThickness) * scale;
		var paths = [];
		var offsetX = 0,
				offsetY = 0;

		for (var i = 0; i < chars.length; i++) {
			var char = chars[i];

			if (char === '\n') {
				offsetX = 0;
				offsetY -= line_height;
			} else {
				var ret = createPath(char, scale, offsetX, offsetY, data);
				offsetX += ret.offsetX;
				paths.push(ret.path);
			}
		}

		return paths;
	}

	function createPath(char, scale, offsetX, offsetY, data) {
		var glyph = data.glyphs[char] || data.glyphs['?'];

		if (!glyph) {
			console.error('THREE.Font: character "' + char + '" does not exists in font family ' + data.familyName + '.');
			return;
		}

		var path = new ShapePath();
		var x, y, cpx, cpy, cpx1, cpy1, cpx2, cpy2;

		if (glyph.o) {
			var outline = glyph._cachedOutline || (glyph._cachedOutline = glyph.o.split(' '));

			for (var i = 0, l = outline.length; i < l;) {
				var action = outline[i++];

				switch (action) {
					case 'm':
						// moveTo
						x = outline[i++] * scale + offsetX;
						y = outline[i++] * scale + offsetY;
						path.moveTo(x, y);
						break;

					case 'l':
						// lineTo
						x = outline[i++] * scale + offsetX;
						y = outline[i++] * scale + offsetY;
						path.lineTo(x, y);
						break;

					case 'q':
						// quadraticCurveTo
						cpx = outline[i++] * scale + offsetX;
						cpy = outline[i++] * scale + offsetY;
						cpx1 = outline[i++] * scale + offsetX;
						cpy1 = outline[i++] * scale + offsetY;
						path.quadraticCurveTo(cpx1, cpy1, cpx, cpy);
						break;

					case 'b':
						// bezierCurveTo
						cpx = outline[i++] * scale + offsetX;
						cpy = outline[i++] * scale + offsetY;
						cpx1 = outline[i++] * scale + offsetX;
						cpy1 = outline[i++] * scale + offsetY;
						cpx2 = outline[i++] * scale + offsetX;
						cpy2 = outline[i++] * scale + offsetY;
						path.bezierCurveTo(cpx1, cpy1, cpx2, cpy2, cpx, cpy);
						break;
				}
			}
		}

		return {
			offsetX: glyph.ha * scale,
			path: path
		};
	}

	function FontLoader(manager) {
		Loader.call(this, manager);
	}

	FontLoader.prototype = Object.assign(Object.create(Loader.prototype), {
		constructor: FontLoader,
		load: function load(url, onLoad, onProgress, onError) {
			var scope = this;
			var loader = new FileLoader(this.manager);
			loader.setPath(this.path);
			loader.setRequestHeader(this.requestHeader);
			loader.setWithCredentials(scope.withCredentials);
			loader.load(url, function (text) {
				var json;

				try {
					json = JSON.parse(text);
				} catch (e) {
					console.warn('THREE.FontLoader: typeface.js support is being deprecated. Use typeface.json instead.');
					json = JSON.parse(text.substring(65, text.length - 2));
				}

				var font = scope.parse(json);
				if (onLoad) onLoad(font);
			}, onProgress, onError);
		},
		parse: function parse(json) {
			return new Font(json);
		}
	});

	var _context;

	var AudioContext = {
		getContext: function getContext() {
			if (_context === undefined) {
				_context = new (window.AudioContext || window.webkitAudioContext)();
			}

			return _context;
		},
		setContext: function setContext(value) {
			_context = value;
		}
	};

	function AudioLoader(manager) {
		Loader.call(this, manager);
	}

	AudioLoader.prototype = Object.assign(Object.create(Loader.prototype), {
		constructor: AudioLoader,
		load: function load(url, onLoad, onProgress, onError) {
			var scope = this;
			var loader = new FileLoader(scope.manager);
			loader.setResponseType('arraybuffer');
			loader.setPath(scope.path);
			loader.setRequestHeader(scope.requestHeader);
			loader.setWithCredentials(scope.withCredentials);
			loader.load(url, function (buffer) {
				try {
					// Create a copy of the buffer. The `decodeAudioData` method
					// detaches the buffer when complete, preventing reuse.
					var bufferCopy = buffer.slice(0);
					var context = AudioContext.getContext();
					context.decodeAudioData(bufferCopy, function (audioBuffer) {
						onLoad(audioBuffer);
					});
				} catch (e) {
					if (onError) {
						onError(e);
					} else {
						console.error(e);
					}

					scope.manager.itemError(url);
				}
			}, onProgress, onError);
		}
	});

	function HemisphereLightProbe(skyColor, groundColor, intensity) {
		LightProbe.call(this, undefined, intensity);
		var color1 = new Color().set(skyColor);
		var color2 = new Color().set(groundColor);
		var sky = new Vector3(color1.r, color1.g, color1.b);
		var ground = new Vector3(color2.r, color2.g, color2.b); // without extra factor of PI in the shader, should = 1 / Math.sqrt( Math.PI );

		var c0 = Math.sqrt(Math.PI);
		var c1 = c0 * Math.sqrt(0.75);
		this.sh.coefficients[0].copy(sky).add(ground).multiplyScalar(c0);
		this.sh.coefficients[1].copy(sky).sub(ground).multiplyScalar(c1);
	}

	HemisphereLightProbe.prototype = Object.assign(Object.create(LightProbe.prototype), {
		constructor: HemisphereLightProbe,
		isHemisphereLightProbe: true,
		copy: function copy(source) {
			// modifying colors not currently supported
			LightProbe.prototype.copy.call(this, source);
			return this;
		},
		toJSON: function toJSON(meta) {
			var data = LightProbe.prototype.toJSON.call(this, meta); // data.sh = this.sh.toArray(); // todo

			return data;
		}
	});

	function AmbientLightProbe(color, intensity) {
		LightProbe.call(this, undefined, intensity);
		var color1 = new Color().set(color); // without extra factor of PI in the shader, would be 2 / Math.sqrt( Math.PI );

		this.sh.coefficients[0].set(color1.r, color1.g, color1.b).multiplyScalar(2 * Math.sqrt(Math.PI));
	}

	AmbientLightProbe.prototype = Object.assign(Object.create(LightProbe.prototype), {
		constructor: AmbientLightProbe,
		isAmbientLightProbe: true,
		copy: function copy(source) {
			// modifying color not currently supported
			LightProbe.prototype.copy.call(this, source);
			return this;
		},
		toJSON: function toJSON(meta) {
			var data = LightProbe.prototype.toJSON.call(this, meta); // data.sh = this.sh.toArray(); // todo

			return data;
		}
	});

	var _eyeRight = new Matrix4();

	var _eyeLeft = new Matrix4();

	function StereoCamera() {
		this.type = 'StereoCamera';
		this.aspect = 1;
		this.eyeSep = 0.064;
		this.cameraL = new PerspectiveCamera();
		this.cameraL.layers.enable(1);
		this.cameraL.matrixAutoUpdate = false;
		this.cameraR = new PerspectiveCamera();
		this.cameraR.layers.enable(2);
		this.cameraR.matrixAutoUpdate = false;
		this._cache = {
			focus: null,
			fov: null,
			aspect: null,
			near: null,
			far: null,
			zoom: null,
			eyeSep: null
		};
	}

	Object.assign(StereoCamera.prototype, {
		update: function update(camera) {
			var cache = this._cache;
			var needsUpdate = cache.focus !== camera.focus || cache.fov !== camera.fov || cache.aspect !== camera.aspect * this.aspect || cache.near !== camera.near || cache.far !== camera.far || cache.zoom !== camera.zoom || cache.eyeSep !== this.eyeSep;

			if (needsUpdate) {
				cache.focus = camera.focus;
				cache.fov = camera.fov;
				cache.aspect = camera.aspect * this.aspect;
				cache.near = camera.near;
				cache.far = camera.far;
				cache.zoom = camera.zoom;
				cache.eyeSep = this.eyeSep; // Off-axis stereoscopic effect based on
				// http://paulbourke.net/stereographics/stereorender/

				var projectionMatrix = camera.projectionMatrix.clone();
				var eyeSepHalf = cache.eyeSep / 2;
				var eyeSepOnProjection = eyeSepHalf * cache.near / cache.focus;
				var ymax = cache.near * Math.tan(MathUtils.DEG2RAD * cache.fov * 0.5) / cache.zoom;
				var xmin, xmax; // translate xOffset

				_eyeLeft.elements[12] = -eyeSepHalf;
				_eyeRight.elements[12] = eyeSepHalf; // for left eye

				xmin = -ymax * cache.aspect + eyeSepOnProjection;
				xmax = ymax * cache.aspect + eyeSepOnProjection;
				projectionMatrix.elements[0] = 2 * cache.near / (xmax - xmin);
				projectionMatrix.elements[8] = (xmax + xmin) / (xmax - xmin);
				this.cameraL.projectionMatrix.copy(projectionMatrix); // for right eye

				xmin = -ymax * cache.aspect - eyeSepOnProjection;
				xmax = ymax * cache.aspect - eyeSepOnProjection;
				projectionMatrix.elements[0] = 2 * cache.near / (xmax - xmin);
				projectionMatrix.elements[8] = (xmax + xmin) / (xmax - xmin);
				this.cameraR.projectionMatrix.copy(projectionMatrix);
			}

			this.cameraL.matrixWorld.copy(camera.matrixWorld).multiply(_eyeLeft);
			this.cameraR.matrixWorld.copy(camera.matrixWorld).multiply(_eyeRight);
		}
	});

	var Clock = /*#__PURE__*/function () {
		function Clock(autoStart) {
			this.autoStart = autoStart !== undefined ? autoStart : true;
			this.startTime = 0;
			this.oldTime = 0;
			this.elapsedTime = 0;
			this.running = false;
		}

		var _proto = Clock.prototype;

		_proto.start = function start() {
			this.startTime = now();
			this.oldTime = this.startTime;
			this.elapsedTime = 0;
			this.running = true;
		};

		_proto.stop = function stop() {
			this.getElapsedTime();
			this.running = false;
			this.autoStart = false;
		};

		_proto.getElapsedTime = function getElapsedTime() {
			this.getDelta();
			return this.elapsedTime;
		};

		_proto.getDelta = function getDelta() {
			var diff = 0;

			if (this.autoStart && !this.running) {
				this.start();
				return 0;
			}

			if (this.running) {
				var newTime = now();
				diff = (newTime - this.oldTime) / 1000;
				this.oldTime = newTime;
				this.elapsedTime += diff;
			}

			return diff;
		};

		return Clock;
	}();

	function now() {
		return (typeof performance === 'undefined' ? Date : performance).now(); // see #10732
	}

	var _position$2 = /*@__PURE__*/new Vector3();

	var _quaternion$3 = /*@__PURE__*/new Quaternion();

	var _scale$1 = /*@__PURE__*/new Vector3();

	var _orientation = /*@__PURE__*/new Vector3();

	var AudioListener = /*#__PURE__*/function (_Object3D) {
		_inheritsLoose(AudioListener, _Object3D);

		function AudioListener() {
			var _this;

			_this = _Object3D.call(this) || this;
			_this.type = 'AudioListener';
			_this.context = AudioContext.getContext();
			_this.gain = _this.context.createGain();

			_this.gain.connect(_this.context.destination);

			_this.filter = null;
			_this.timeDelta = 0; // private

			_this._clock = new Clock();
			return _this;
		}

		var _proto = AudioListener.prototype;

		_proto.getInput = function getInput() {
			return this.gain;
		};

		_proto.removeFilter = function removeFilter() {
			if (this.filter !== null) {
				this.gain.disconnect(this.filter);
				this.filter.disconnect(this.context.destination);
				this.gain.connect(this.context.destination);
				this.filter = null;
			}

			return this;
		};

		_proto.getFilter = function getFilter() {
			return this.filter;
		};

		_proto.setFilter = function setFilter(value) {
			if (this.filter !== null) {
				this.gain.disconnect(this.filter);
				this.filter.disconnect(this.context.destination);
			} else {
				this.gain.disconnect(this.context.destination);
			}

			this.filter = value;
			this.gain.connect(this.filter);
			this.filter.connect(this.context.destination);
			return this;
		};

		_proto.getMasterVolume = function getMasterVolume() {
			return this.gain.gain.value;
		};

		_proto.setMasterVolume = function setMasterVolume(value) {
			this.gain.gain.setTargetAtTime(value, this.context.currentTime, 0.01);
			return this;
		};

		_proto.updateMatrixWorld = function updateMatrixWorld(force) {
			_Object3D.prototype.updateMatrixWorld.call(this, force);

			var listener = this.context.listener;
			var up = this.up;
			this.timeDelta = this._clock.getDelta();
			this.matrixWorld.decompose(_position$2, _quaternion$3, _scale$1);

			_orientation.set(0, 0, -1).applyQuaternion(_quaternion$3);

			if (listener.positionX) {
				// code path for Chrome (see #14393)
				var endTime = this.context.currentTime + this.timeDelta;
				listener.positionX.linearRampToValueAtTime(_position$2.x, endTime);
				listener.positionY.linearRampToValueAtTime(_position$2.y, endTime);
				listener.positionZ.linearRampToValueAtTime(_position$2.z, endTime);
				listener.forwardX.linearRampToValueAtTime(_orientation.x, endTime);
				listener.forwardY.linearRampToValueAtTime(_orientation.y, endTime);
				listener.forwardZ.linearRampToValueAtTime(_orientation.z, endTime);
				listener.upX.linearRampToValueAtTime(up.x, endTime);
				listener.upY.linearRampToValueAtTime(up.y, endTime);
				listener.upZ.linearRampToValueAtTime(up.z, endTime);
			} else {
				listener.setPosition(_position$2.x, _position$2.y, _position$2.z);
				listener.setOrientation(_orientation.x, _orientation.y, _orientation.z, up.x, up.y, up.z);
			}
		};

		return AudioListener;
	}(Object3D);

	var Audio = /*#__PURE__*/function (_Object3D) {
		_inheritsLoose(Audio, _Object3D);

		function Audio(listener) {
			var _this;

			_this = _Object3D.call(this) || this;
			_this.type = 'Audio';
			_this.listener = listener;
			_this.context = listener.context;
			_this.gain = _this.context.createGain();

			_this.gain.connect(listener.getInput());

			_this.autoplay = false;
			_this.buffer = null;
			_this.detune = 0;
			_this.loop = false;
			_this.loopStart = 0;
			_this.loopEnd = 0;
			_this.offset = 0;
			_this.duration = undefined;
			_this.playbackRate = 1;
			_this.isPlaying = false;
			_this.hasPlaybackControl = true;
			_this.source = null;
			_this.sourceType = 'empty';
			_this._startedAt = 0;
			_this._progress = 0;
			_this._connected = false;
			_this.filters = [];
			return _this;
		}

		var _proto = Audio.prototype;

		_proto.getOutput = function getOutput() {
			return this.gain;
		};

		_proto.setNodeSource = function setNodeSource(audioNode) {
			this.hasPlaybackControl = false;
			this.sourceType = 'audioNode';
			this.source = audioNode;
			this.connect();
			return this;
		};

		_proto.setMediaElementSource = function setMediaElementSource(mediaElement) {
			this.hasPlaybackControl = false;
			this.sourceType = 'mediaNode';
			this.source = this.context.createMediaElementSource(mediaElement);
			this.connect();
			return this;
		};

		_proto.setMediaStreamSource = function setMediaStreamSource(mediaStream) {
			this.hasPlaybackControl = false;
			this.sourceType = 'mediaStreamNode';
			this.source = this.context.createMediaStreamSource(mediaStream);
			this.connect();
			return this;
		};

		_proto.setBuffer = function setBuffer(audioBuffer) {
			this.buffer = audioBuffer;
			this.sourceType = 'buffer';
			if (this.autoplay) this.play();
			return this;
		};

		_proto.play = function play(delay) {
			if (delay === void 0) {
				delay = 0;
			}

			if (this.isPlaying === true) {
				console.warn('THREE.Audio: Audio is already playing.');
				return;
			}

			if (this.hasPlaybackControl === false) {
				console.warn('THREE.Audio: this Audio has no playback control.');
				return;
			}

			this._startedAt = this.context.currentTime + delay;
			var source = this.context.createBufferSource();
			source.buffer = this.buffer;
			source.loop = this.loop;
			source.loopStart = this.loopStart;
			source.loopEnd = this.loopEnd;
			source.onended = this.onEnded.bind(this);
			source.start(this._startedAt, this._progress + this.offset, this.duration);
			this.isPlaying = true;
			this.source = source;
			this.setDetune(this.detune);
			this.setPlaybackRate(this.playbackRate);
			return this.connect();
		};

		_proto.pause = function pause() {
			if (this.hasPlaybackControl === false) {
				console.warn('THREE.Audio: this Audio has no playback control.');
				return;
			}

			if (this.isPlaying === true) {
				// update current progress
				this._progress += Math.max(this.context.currentTime - this._startedAt, 0) * this.playbackRate;

				if (this.loop === true) {
					// ensure _progress does not exceed duration with looped audios
					this._progress = this._progress % (this.duration || this.buffer.duration);
				}

				this.source.stop();
				this.source.onended = null;
				this.isPlaying = false;
			}

			return this;
		};

		_proto.stop = function stop() {
			if (this.hasPlaybackControl === false) {
				console.warn('THREE.Audio: this Audio has no playback control.');
				return;
			}

			this._progress = 0;
			this.source.stop();
			this.source.onended = null;
			this.isPlaying = false;
			return this;
		};

		_proto.connect = function connect() {
			if (this.filters.length > 0) {
				this.source.connect(this.filters[0]);

				for (var i = 1, l = this.filters.length; i < l; i++) {
					this.filters[i - 1].connect(this.filters[i]);
				}

				this.filters[this.filters.length - 1].connect(this.getOutput());
			} else {
				this.source.connect(this.getOutput());
			}

			this._connected = true;
			return this;
		};

		_proto.disconnect = function disconnect() {
			if (this.filters.length > 0) {
				this.source.disconnect(this.filters[0]);

				for (var i = 1, l = this.filters.length; i < l; i++) {
					this.filters[i - 1].disconnect(this.filters[i]);
				}

				this.filters[this.filters.length - 1].disconnect(this.getOutput());
			} else {
				this.source.disconnect(this.getOutput());
			}

			this._connected = false;
			return this;
		};

		_proto.getFilters = function getFilters() {
			return this.filters;
		};

		_proto.setFilters = function setFilters(value) {
			if (!value) value = [];

			if (this._connected === true) {
				this.disconnect();
				this.filters = value.slice();
				this.connect();
			} else {
				this.filters = value.slice();
			}

			return this;
		};

		_proto.setDetune = function setDetune(value) {
			this.detune = value;
			if (this.source.detune === undefined) return; // only set detune when available

			if (this.isPlaying === true) {
				this.source.detune.setTargetAtTime(this.detune, this.context.currentTime, 0.01);
			}

			return this;
		};

		_proto.getDetune = function getDetune() {
			return this.detune;
		};

		_proto.getFilter = function getFilter() {
			return this.getFilters()[0];
		};

		_proto.setFilter = function setFilter(filter) {
			return this.setFilters(filter ? [filter] : []);
		};

		_proto.setPlaybackRate = function setPlaybackRate(value) {
			if (this.hasPlaybackControl === false) {
				console.warn('THREE.Audio: this Audio has no playback control.');
				return;
			}

			this.playbackRate = value;

			if (this.isPlaying === true) {
				this.source.playbackRate.setTargetAtTime(this.playbackRate, this.context.currentTime, 0.01);
			}

			return this;
		};

		_proto.getPlaybackRate = function getPlaybackRate() {
			return this.playbackRate;
		};

		_proto.onEnded = function onEnded() {
			this.isPlaying = false;
		};

		_proto.getLoop = function getLoop() {
			if (this.hasPlaybackControl === false) {
				console.warn('THREE.Audio: this Audio has no playback control.');
				return false;
			}

			return this.loop;
		};

		_proto.setLoop = function setLoop(value) {
			if (this.hasPlaybackControl === false) {
				console.warn('THREE.Audio: this Audio has no playback control.');
				return;
			}

			this.loop = value;

			if (this.isPlaying === true) {
				this.source.loop = this.loop;
			}

			return this;
		};

		_proto.setLoopStart = function setLoopStart(value) {
			this.loopStart = value;
			return this;
		};

		_proto.setLoopEnd = function setLoopEnd(value) {
			this.loopEnd = value;
			return this;
		};

		_proto.getVolume = function getVolume() {
			return this.gain.gain.value;
		};

		_proto.setVolume = function setVolume(value) {
			this.gain.gain.setTargetAtTime(value, this.context.currentTime, 0.01);
			return this;
		};

		return Audio;
	}(Object3D);

	var _position$3 = /*@__PURE__*/new Vector3();

	var _quaternion$4 = /*@__PURE__*/new Quaternion();

	var _scale$2 = /*@__PURE__*/new Vector3();

	var _orientation$1 = /*@__PURE__*/new Vector3();

	var PositionalAudio = /*#__PURE__*/function (_Audio) {
		_inheritsLoose(PositionalAudio, _Audio);

		function PositionalAudio(listener) {
			var _this;

			_this = _Audio.call(this, listener) || this;
			_this.panner = _this.context.createPanner();
			_this.panner.panningModel = 'HRTF';

			_this.panner.connect(_this.gain);

			return _this;
		}

		var _proto = PositionalAudio.prototype;

		_proto.getOutput = function getOutput() {
			return this.panner;
		};

		_proto.getRefDistance = function getRefDistance() {
			return this.panner.refDistance;
		};

		_proto.setRefDistance = function setRefDistance(value) {
			this.panner.refDistance = value;
			return this;
		};

		_proto.getRolloffFactor = function getRolloffFactor() {
			return this.panner.rolloffFactor;
		};

		_proto.setRolloffFactor = function setRolloffFactor(value) {
			this.panner.rolloffFactor = value;
			return this;
		};

		_proto.getDistanceModel = function getDistanceModel() {
			return this.panner.distanceModel;
		};

		_proto.setDistanceModel = function setDistanceModel(value) {
			this.panner.distanceModel = value;
			return this;
		};

		_proto.getMaxDistance = function getMaxDistance() {
			return this.panner.maxDistance;
		};

		_proto.setMaxDistance = function setMaxDistance(value) {
			this.panner.maxDistance = value;
			return this;
		};

		_proto.setDirectionalCone = function setDirectionalCone(coneInnerAngle, coneOuterAngle, coneOuterGain) {
			this.panner.coneInnerAngle = coneInnerAngle;
			this.panner.coneOuterAngle = coneOuterAngle;
			this.panner.coneOuterGain = coneOuterGain;
			return this;
		};

		_proto.updateMatrixWorld = function updateMatrixWorld(force) {
			_Audio.prototype.updateMatrixWorld.call(this, force);

			if (this.hasPlaybackControl === true && this.isPlaying === false) return;
			this.matrixWorld.decompose(_position$3, _quaternion$4, _scale$2);

			_orientation$1.set(0, 0, 1).applyQuaternion(_quaternion$4);

			var panner = this.panner;

			if (panner.positionX) {
				// code path for Chrome and Firefox (see #14393)
				var endTime = this.context.currentTime + this.listener.timeDelta;
				panner.positionX.linearRampToValueAtTime(_position$3.x, endTime);
				panner.positionY.linearRampToValueAtTime(_position$3.y, endTime);
				panner.positionZ.linearRampToValueAtTime(_position$3.z, endTime);
				panner.orientationX.linearRampToValueAtTime(_orientation$1.x, endTime);
				panner.orientationY.linearRampToValueAtTime(_orientation$1.y, endTime);
				panner.orientationZ.linearRampToValueAtTime(_orientation$1.z, endTime);
			} else {
				panner.setPosition(_position$3.x, _position$3.y, _position$3.z);
				panner.setOrientation(_orientation$1.x, _orientation$1.y, _orientation$1.z);
			}
		};

		return PositionalAudio;
	}(Audio);

	var AudioAnalyser = /*#__PURE__*/function () {
		function AudioAnalyser(audio, fftSize) {
			if (fftSize === void 0) {
				fftSize = 2048;
			}

			this.analyser = audio.context.createAnalyser();
			this.analyser.fftSize = fftSize;
			this.data = new Uint8Array(this.analyser.frequencyBinCount);
			audio.getOutput().connect(this.analyser);
		}

		var _proto = AudioAnalyser.prototype;

		_proto.getFrequencyData = function getFrequencyData() {
			this.analyser.getByteFrequencyData(this.data);
			return this.data;
		};

		_proto.getAverageFrequency = function getAverageFrequency() {
			var value = 0;
			var data = this.getFrequencyData();

			for (var i = 0; i < data.length; i++) {
				value += data[i];
			}

			return value / data.length;
		};

		return AudioAnalyser;
	}();

	function PropertyMixer(binding, typeName, valueSize) {
		this.binding = binding;
		this.valueSize = valueSize;
		var mixFunction, mixFunctionAdditive, setIdentity; // buffer layout: [ incoming | accu0 | accu1 | orig | addAccu | (optional work) ]
		//
		// interpolators can use .buffer as their .result
		// the data then goes to 'incoming'
		//
		// 'accu0' and 'accu1' are used frame-interleaved for
		// the cumulative result and are compared to detect
		// changes
		//
		// 'orig' stores the original state of the property
		//
		// 'add' is used for additive cumulative results
		//
		// 'work' is optional and is only present for quaternion types. It is used
		// to store intermediate quaternion multiplication results

		switch (typeName) {
			case 'quaternion':
				mixFunction = this._slerp;
				mixFunctionAdditive = this._slerpAdditive;
				setIdentity = this._setAdditiveIdentityQuaternion;
				this.buffer = new Float64Array(valueSize * 6);
				this._workIndex = 5;
				break;

			case 'string':
			case 'bool':
				mixFunction = this._select; // Use the regular mix function and for additive on these types,
				// additive is not relevant for non-numeric types

				mixFunctionAdditive = this._select;
				setIdentity = this._setAdditiveIdentityOther;
				this.buffer = new Array(valueSize * 5);
				break;

			default:
				mixFunction = this._lerp;
				mixFunctionAdditive = this._lerpAdditive;
				setIdentity = this._setAdditiveIdentityNumeric;
				this.buffer = new Float64Array(valueSize * 5);
		}

		this._mixBufferRegion = mixFunction;
		this._mixBufferRegionAdditive = mixFunctionAdditive;
		this._setIdentity = setIdentity;
		this._origIndex = 3;
		this._addIndex = 4;
		this.cumulativeWeight = 0;
		this.cumulativeWeightAdditive = 0;
		this.useCount = 0;
		this.referenceCount = 0;
	}

	Object.assign(PropertyMixer.prototype, {
		// accumulate data in the 'incoming' region into 'accu<i>'
		accumulate: function accumulate(accuIndex, weight) {
			// note: happily accumulating nothing when weight = 0, the caller knows
			// the weight and shouldn't have made the call in the first place
			var buffer = this.buffer,
					stride = this.valueSize,
					offset = accuIndex * stride + stride;
			var currentWeight = this.cumulativeWeight;

			if (currentWeight === 0) {
				// accuN := incoming * weight
				for (var i = 0; i !== stride; ++i) {
					buffer[offset + i] = buffer[i];
				}

				currentWeight = weight;
			} else {
				// accuN := accuN + incoming * weight
				currentWeight += weight;
				var mix = weight / currentWeight;

				this._mixBufferRegion(buffer, offset, 0, mix, stride);
			}

			this.cumulativeWeight = currentWeight;
		},
		// accumulate data in the 'incoming' region into 'add'
		accumulateAdditive: function accumulateAdditive(weight) {
			var buffer = this.buffer,
					stride = this.valueSize,
					offset = stride * this._addIndex;

			if (this.cumulativeWeightAdditive === 0) {
				// add = identity
				this._setIdentity();
			} // add := add + incoming * weight


			this._mixBufferRegionAdditive(buffer, offset, 0, weight, stride);

			this.cumulativeWeightAdditive += weight;
		},
		// apply the state of 'accu<i>' to the binding when accus differ
		apply: function apply(accuIndex) {
			var stride = this.valueSize,
					buffer = this.buffer,
					offset = accuIndex * stride + stride,
					weight = this.cumulativeWeight,
					weightAdditive = this.cumulativeWeightAdditive,
					binding = this.binding;
			this.cumulativeWeight = 0;
			this.cumulativeWeightAdditive = 0;

			if (weight < 1) {
				// accuN := accuN + original * ( 1 - cumulativeWeight )
				var originalValueOffset = stride * this._origIndex;

				this._mixBufferRegion(buffer, offset, originalValueOffset, 1 - weight, stride);
			}

			if (weightAdditive > 0) {
				// accuN := accuN + additive accuN
				this._mixBufferRegionAdditive(buffer, offset, this._addIndex * stride, 1, stride);
			}

			for (var i = stride, e = stride + stride; i !== e; ++i) {
				if (buffer[i] !== buffer[i + stride]) {
					// value has changed -> update scene graph
					binding.setValue(buffer, offset);
					break;
				}
			}
		},
		// remember the state of the bound property and copy it to both accus
		saveOriginalState: function saveOriginalState() {
			var binding = this.binding;
			var buffer = this.buffer,
					stride = this.valueSize,
					originalValueOffset = stride * this._origIndex;
			binding.getValue(buffer, originalValueOffset); // accu[0..1] := orig -- initially detect changes against the original

			for (var i = stride, e = originalValueOffset; i !== e; ++i) {
				buffer[i] = buffer[originalValueOffset + i % stride];
			} // Add to identity for additive


			this._setIdentity();

			this.cumulativeWeight = 0;
			this.cumulativeWeightAdditive = 0;
		},
		// apply the state previously taken via 'saveOriginalState' to the binding
		restoreOriginalState: function restoreOriginalState() {
			var originalValueOffset = this.valueSize * 3;
			this.binding.setValue(this.buffer, originalValueOffset);
		},
		_setAdditiveIdentityNumeric: function _setAdditiveIdentityNumeric() {
			var startIndex = this._addIndex * this.valueSize;
			var endIndex = startIndex + this.valueSize;

			for (var i = startIndex; i < endIndex; i++) {
				this.buffer[i] = 0;
			}
		},
		_setAdditiveIdentityQuaternion: function _setAdditiveIdentityQuaternion() {
			this._setAdditiveIdentityNumeric();

			this.buffer[this._addIndex * this.valueSize + 3] = 1;
		},
		_setAdditiveIdentityOther: function _setAdditiveIdentityOther() {
			var startIndex = this._origIndex * this.valueSize;
			var targetIndex = this._addIndex * this.valueSize;

			for (var i = 0; i < this.valueSize; i++) {
				this.buffer[targetIndex + i] = this.buffer[startIndex + i];
			}
		},
		// mix functions
		_select: function _select(buffer, dstOffset, srcOffset, t, stride) {
			if (t >= 0.5) {
				for (var i = 0; i !== stride; ++i) {
					buffer[dstOffset + i] = buffer[srcOffset + i];
				}
			}
		},
		_slerp: function _slerp(buffer, dstOffset, srcOffset, t) {
			Quaternion.slerpFlat(buffer, dstOffset, buffer, dstOffset, buffer, srcOffset, t);
		},
		_slerpAdditive: function _slerpAdditive(buffer, dstOffset, srcOffset, t, stride) {
			var workOffset = this._workIndex * stride; // Store result in intermediate buffer offset

			Quaternion.multiplyQuaternionsFlat(buffer, workOffset, buffer, dstOffset, buffer, srcOffset); // Slerp to the intermediate result

			Quaternion.slerpFlat(buffer, dstOffset, buffer, dstOffset, buffer, workOffset, t);
		},
		_lerp: function _lerp(buffer, dstOffset, srcOffset, t, stride) {
			var s = 1 - t;

			for (var i = 0; i !== stride; ++i) {
				var j = dstOffset + i;
				buffer[j] = buffer[j] * s + buffer[srcOffset + i] * t;
			}
		},
		_lerpAdditive: function _lerpAdditive(buffer, dstOffset, srcOffset, t, stride) {
			for (var i = 0; i !== stride; ++i) {
				var j = dstOffset + i;
				buffer[j] = buffer[j] + buffer[srcOffset + i] * t;
			}
		}
	});

	// Characters [].:/ are reserved for track binding syntax.
	var _RESERVED_CHARS_RE = '\\[\\]\\.:\\/';

	var _reservedRe = new RegExp('[' + _RESERVED_CHARS_RE + ']', 'g'); // Attempts to allow node names from any language. ES5's `\w` regexp matches
	// only latin characters, and the unicode \p{L} is not yet supported. So
	// instead, we exclude reserved characters and match everything else.


	var _wordChar = '[^' + _RESERVED_CHARS_RE + ']';

	var _wordCharOrDot = '[^' + _RESERVED_CHARS_RE.replace('\\.', '') + ']'; // Parent directories, delimited by '/' or ':'. Currently unused, but must
	// be matched to parse the rest of the track name.


	var _directoryRe = /((?:WC+[\/:])*)/.source.replace('WC', _wordChar); // Target node. May contain word characters (a-zA-Z0-9_) and '.' or '-'.


	var _nodeRe = /(WCOD+)?/.source.replace('WCOD', _wordCharOrDot); // Object on target node, and accessor. May not contain reserved
	// characters. Accessor may contain any character except closing bracket.


	var _objectRe = /(?:\.(WC+)(?:\[(.+)\])?)?/.source.replace('WC', _wordChar); // Property and accessor. May not contain reserved characters. Accessor may
	// contain any non-bracket characters.


	var _propertyRe = /\.(WC+)(?:\[(.+)\])?/.source.replace('WC', _wordChar);

	var _trackRe = new RegExp('' + '^' + _directoryRe + _nodeRe + _objectRe + _propertyRe + '$');

	var _supportedObjectNames = ['material', 'materials', 'bones'];

	function Composite(targetGroup, path, optionalParsedPath) {
		var parsedPath = optionalParsedPath || PropertyBinding.parseTrackName(path);
		this._targetGroup = targetGroup;
		this._bindings = targetGroup.subscribe_(path, parsedPath);
	}

	Object.assign(Composite.prototype, {
		getValue: function getValue(array, offset) {
			this.bind(); // bind all binding

			var firstValidIndex = this._targetGroup.nCachedObjects_,
					binding = this._bindings[firstValidIndex]; // and only call .getValue on the first

			if (binding !== undefined) binding.getValue(array, offset);
		},
		setValue: function setValue(array, offset) {
			var bindings = this._bindings;

			for (var i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++i) {
				bindings[i].setValue(array, offset);
			}
		},
		bind: function bind() {
			var bindings = this._bindings;

			for (var i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++i) {
				bindings[i].bind();
			}
		},
		unbind: function unbind() {
			var bindings = this._bindings;

			for (var i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++i) {
				bindings[i].unbind();
			}
		}
	});

	function PropertyBinding(rootNode, path, parsedPath) {
		this.path = path;
		this.parsedPath = parsedPath || PropertyBinding.parseTrackName(path);
		this.node = PropertyBinding.findNode(rootNode, this.parsedPath.nodeName) || rootNode;
		this.rootNode = rootNode;
	}

	Object.assign(PropertyBinding, {
		Composite: Composite,
		create: function create(root, path, parsedPath) {
			if (!(root && root.isAnimationObjectGroup)) {
				return new PropertyBinding(root, path, parsedPath);
			} else {
				return new PropertyBinding.Composite(root, path, parsedPath);
			}
		},

		/**
		 * Replaces spaces with underscores and removes unsupported characters from
		 * node names, to ensure compatibility with parseTrackName().
		 *
		 * @param {string} name Node name to be sanitized.
		 * @return {string}
		 */
		sanitizeNodeName: function sanitizeNodeName(name) {
			return name.replace(/\s/g, '_').replace(_reservedRe, '');
		},
		parseTrackName: function parseTrackName(trackName) {
			var matches = _trackRe.exec(trackName);

			if (!matches) {
				throw new Error('PropertyBinding: Cannot parse trackName: ' + trackName);
			}

			var results = {
				// directoryName: matches[ 1 ], // (tschw) currently unused
				nodeName: matches[2],
				objectName: matches[3],
				objectIndex: matches[4],
				propertyName: matches[5],
				// required
				propertyIndex: matches[6]
			};
			var lastDot = results.nodeName && results.nodeName.lastIndexOf('.');

			if (lastDot !== undefined && lastDot !== -1) {
				var objectName = results.nodeName.substring(lastDot + 1); // Object names must be checked against an allowlist. Otherwise, there
				// is no way to parse 'foo.bar.baz': 'baz' must be a property, but
				// 'bar' could be the objectName, or part of a nodeName (which can
				// include '.' characters).

				if (_supportedObjectNames.indexOf(objectName) !== -1) {
					results.nodeName = results.nodeName.substring(0, lastDot);
					results.objectName = objectName;
				}
			}

			if (results.propertyName === null || results.propertyName.length === 0) {
				throw new Error('PropertyBinding: can not parse propertyName from trackName: ' + trackName);
			}

			return results;
		},
		findNode: function findNode(root, nodeName) {
			if (!nodeName || nodeName === '' || nodeName === '.' || nodeName === -1 || nodeName === root.name || nodeName === root.uuid) {
				return root;
			} // search into skeleton bones.


			if (root.skeleton) {
				var bone = root.skeleton.getBoneByName(nodeName);

				if (bone !== undefined) {
					return bone;
				}
			} // search into node subtree.


			if (root.children) {
				var searchNodeSubtree = function searchNodeSubtree(children) {
					for (var i = 0; i < children.length; i++) {
						var childNode = children[i];

						if (childNode.name === nodeName || childNode.uuid === nodeName) {
							return childNode;
						}

						var result = searchNodeSubtree(childNode.children);
						if (result) return result;
					}

					return null;
				};

				var subTreeNode = searchNodeSubtree(root.children);

				if (subTreeNode) {
					return subTreeNode;
				}
			}

			return null;
		}
	});
	Object.assign(PropertyBinding.prototype, {
		// prototype, continued
		// these are used to "bind" a nonexistent property
		_getValue_unavailable: function _getValue_unavailable() {},
		_setValue_unavailable: function _setValue_unavailable() {},
		BindingType: {
			Direct: 0,
			EntireArray: 1,
			ArrayElement: 2,
			HasFromToArray: 3
		},
		Versioning: {
			None: 0,
			NeedsUpdate: 1,
			MatrixWorldNeedsUpdate: 2
		},
		GetterByBindingType: [function getValue_direct(buffer, offset) {
			buffer[offset] = this.node[this.propertyName];
		}, function getValue_array(buffer, offset) {
			var source = this.resolvedProperty;

			for (var i = 0, n = source.length; i !== n; ++i) {
				buffer[offset++] = source[i];
			}
		}, function getValue_arrayElement(buffer, offset) {
			buffer[offset] = this.resolvedProperty[this.propertyIndex];
		}, function getValue_toArray(buffer, offset) {
			this.resolvedProperty.toArray(buffer, offset);
		}],
		SetterByBindingTypeAndVersioning: [[// Direct
		function setValue_direct(buffer, offset) {
			this.targetObject[this.propertyName] = buffer[offset];
		}, function setValue_direct_setNeedsUpdate(buffer, offset) {
			this.targetObject[this.propertyName] = buffer[offset];
			this.targetObject.needsUpdate = true;
		}, function setValue_direct_setMatrixWorldNeedsUpdate(buffer, offset) {
			this.targetObject[this.propertyName] = buffer[offset];
			this.targetObject.matrixWorldNeedsUpdate = true;
		}], [// EntireArray
		function setValue_array(buffer, offset) {
			var dest = this.resolvedProperty;

			for (var i = 0, n = dest.length; i !== n; ++i) {
				dest[i] = buffer[offset++];
			}
		}, function setValue_array_setNeedsUpdate(buffer, offset) {
			var dest = this.resolvedProperty;

			for (var i = 0, n = dest.length; i !== n; ++i) {
				dest[i] = buffer[offset++];
			}

			this.targetObject.needsUpdate = true;
		}, function setValue_array_setMatrixWorldNeedsUpdate(buffer, offset) {
			var dest = this.resolvedProperty;

			for (var i = 0, n = dest.length; i !== n; ++i) {
				dest[i] = buffer[offset++];
			}

			this.targetObject.matrixWorldNeedsUpdate = true;
		}], [// ArrayElement
		function setValue_arrayElement(buffer, offset) {
			this.resolvedProperty[this.propertyIndex] = buffer[offset];
		}, function setValue_arrayElement_setNeedsUpdate(buffer, offset) {
			this.resolvedProperty[this.propertyIndex] = buffer[offset];
			this.targetObject.needsUpdate = true;
		}, function setValue_arrayElement_setMatrixWorldNeedsUpdate(buffer, offset) {
			this.resolvedProperty[this.propertyIndex] = buffer[offset];
			this.targetObject.matrixWorldNeedsUpdate = true;
		}], [// HasToFromArray
		function setValue_fromArray(buffer, offset) {
			this.resolvedProperty.fromArray(buffer, offset);
		}, function setValue_fromArray_setNeedsUpdate(buffer, offset) {
			this.resolvedProperty.fromArray(buffer, offset);
			this.targetObject.needsUpdate = true;
		}, function setValue_fromArray_setMatrixWorldNeedsUpdate(buffer, offset) {
			this.resolvedProperty.fromArray(buffer, offset);
			this.targetObject.matrixWorldNeedsUpdate = true;
		}]],
		getValue: function getValue_unbound(targetArray, offset) {
			this.bind();
			this.getValue(targetArray, offset); // Note: This class uses a State pattern on a per-method basis:
			// 'bind' sets 'this.getValue' / 'setValue' and shadows the
			// prototype version of these methods with one that represents
			// the bound state. When the property is not found, the methods
			// become no-ops.
		},
		setValue: function getValue_unbound(sourceArray, offset) {
			this.bind();
			this.setValue(sourceArray, offset);
		},
		// create getter / setter pair for a property in the scene graph
		bind: function bind() {
			var targetObject = this.node;
			var parsedPath = this.parsedPath;
			var objectName = parsedPath.objectName;
			var propertyName = parsedPath.propertyName;
			var propertyIndex = parsedPath.propertyIndex;

			if (!targetObject) {
				targetObject = PropertyBinding.findNode(this.rootNode, parsedPath.nodeName) || this.rootNode;
				this.node = targetObject;
			} // set fail state so we can just 'return' on error


			this.getValue = this._getValue_unavailable;
			this.setValue = this._setValue_unavailable; // ensure there is a value node

			if (!targetObject) {
				console.error('THREE.PropertyBinding: Trying to update node for track: ' + this.path + ' but it wasn\'t found.');
				return;
			}

			if (objectName) {
				var objectIndex = parsedPath.objectIndex; // special cases were we need to reach deeper into the hierarchy to get the face materials....

				switch (objectName) {
					case 'materials':
						if (!targetObject.material) {
							console.error('THREE.PropertyBinding: Can not bind to material as node does not have a material.', this);
							return;
						}

						if (!targetObject.material.materials) {
							console.error('THREE.PropertyBinding: Can not bind to material.materials as node.material does not have a materials array.', this);
							return;
						}

						targetObject = targetObject.material.materials;
						break;

					case 'bones':
						if (!targetObject.skeleton) {
							console.error('THREE.PropertyBinding: Can not bind to bones as node does not have a skeleton.', this);
							return;
						} // potential future optimization: skip this if propertyIndex is already an integer
						// and convert the integer string to a true integer.


						targetObject = targetObject.skeleton.bones; // support resolving morphTarget names into indices.

						for (var i = 0; i < targetObject.length; i++) {
							if (targetObject[i].name === objectIndex) {
								objectIndex = i;
								break;
							}
						}

						break;

					default:
						if (targetObject[objectName] === undefined) {
							console.error('THREE.PropertyBinding: Can not bind to objectName of node undefined.', this);
							return;
						}

						targetObject = targetObject[objectName];
				}

				if (objectIndex !== undefined) {
					if (targetObject[objectIndex] === undefined) {
						console.error('THREE.PropertyBinding: Trying to bind to objectIndex of objectName, but is undefined.', this, targetObject);
						return;
					}

					targetObject = targetObject[objectIndex];
				}
			} // resolve property


			var nodeProperty = targetObject[propertyName];

			if (nodeProperty === undefined) {
				var nodeName = parsedPath.nodeName;
				console.error('THREE.PropertyBinding: Trying to update property for track: ' + nodeName + '.' + propertyName + ' but it wasn\'t found.', targetObject);
				return;
			} // determine versioning scheme


			var versioning = this.Versioning.None;
			this.targetObject = targetObject;

			if (targetObject.needsUpdate !== undefined) {
				// material
				versioning = this.Versioning.NeedsUpdate;
			} else if (targetObject.matrixWorldNeedsUpdate !== undefined) {
				// node transform
				versioning = this.Versioning.MatrixWorldNeedsUpdate;
			} // determine how the property gets bound


			var bindingType = this.BindingType.Direct;

			if (propertyIndex !== undefined) {
				// access a sub element of the property array (only primitives are supported right now)
				if (propertyName === 'morphTargetInfluences') {
					// potential optimization, skip this if propertyIndex is already an integer, and convert the integer string to a true integer.
					// support resolving morphTarget names into indices.
					if (!targetObject.geometry) {
						console.error('THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.', this);
						return;
					}

					if (targetObject.geometry.isBufferGeometry) {
						if (!targetObject.geometry.morphAttributes) {
							console.error('THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.morphAttributes.', this);
							return;
						}

						if (targetObject.morphTargetDictionary[propertyIndex] !== undefined) {
							propertyIndex = targetObject.morphTargetDictionary[propertyIndex];
						}
					} else {
						console.error('THREE.PropertyBinding: Can not bind to morphTargetInfluences on THREE.Geometry. Use THREE.BufferGeometry instead.', this);
						return;
					}
				}

				bindingType = this.BindingType.ArrayElement;
				this.resolvedProperty = nodeProperty;
				this.propertyIndex = propertyIndex;
			} else if (nodeProperty.fromArray !== undefined && nodeProperty.toArray !== undefined) {
				// must use copy for Object3D.Euler/Quaternion
				bindingType = this.BindingType.HasFromToArray;
				this.resolvedProperty = nodeProperty;
			} else if (Array.isArray(nodeProperty)) {
				bindingType = this.BindingType.EntireArray;
				this.resolvedProperty = nodeProperty;
			} else {
				this.propertyName = propertyName;
			} // select getter / setter


			this.getValue = this.GetterByBindingType[bindingType];
			this.setValue = this.SetterByBindingTypeAndVersioning[bindingType][versioning];
		},
		unbind: function unbind() {
			this.node = null; // back to the prototype version of getValue / setValue
			// note: avoiding to mutate the shape of 'this' via 'delete'

			this.getValue = this._getValue_unbound;
			this.setValue = this._setValue_unbound;
		}
	}); // DECLARE ALIAS AFTER assign prototype

	Object.assign(PropertyBinding.prototype, {
		// initial state of these methods that calls 'bind'
		_getValue_unbound: PropertyBinding.prototype.getValue,
		_setValue_unbound: PropertyBinding.prototype.setValue
	});

	/**
	 *
	 * A group of objects that receives a shared animation state.
	 *
	 * Usage:
	 *
	 *	- Add objects you would otherwise pass as 'root' to the
	 *		constructor or the .clipAction method of AnimationMixer.
	 *
	 *	- Instead pass this object as 'root'.
	 *
	 *	- You can also add and remove objects later when the mixer
	 *		is running.
	 *
	 * Note:
	 *
	 *		Objects of this class appear as one object to the mixer,
	 *		so cache control of the individual objects must be done
	 *		on the group.
	 *
	 * Limitation:
	 *
	 *	- The animated properties must be compatible among the
	 *		all objects in the group.
	 *
	 *	- A single property can either be controlled through a
	 *		target group or directly, but not both.
	 */

	function AnimationObjectGroup() {
		this.uuid = MathUtils.generateUUID(); // cached objects followed by the active ones

		this._objects = Array.prototype.slice.call(arguments);
		this.nCachedObjects_ = 0; // threshold
		// note: read by PropertyBinding.Composite

		var indices = {};
		this._indicesByUUID = indices; // for bookkeeping

		for (var i = 0, n = arguments.length; i !== n; ++i) {
			indices[arguments[i].uuid] = i;
		}

		this._paths = []; // inside: string

		this._parsedPaths = []; // inside: { we don't care, here }

		this._bindings = []; // inside: Array< PropertyBinding >

		this._bindingsIndicesByPath = {}; // inside: indices in these arrays

		var scope = this;
		this.stats = {
			objects: {
				get total() {
					return scope._objects.length;
				},

				get inUse() {
					return this.total - scope.nCachedObjects_;
				}

			},

			get bindingsPerObject() {
				return scope._bindings.length;
			}

		};
	}

	Object.assign(AnimationObjectGroup.prototype, {
		isAnimationObjectGroup: true,
		add: function add() {
			var objects = this._objects,
					indicesByUUID = this._indicesByUUID,
					paths = this._paths,
					parsedPaths = this._parsedPaths,
					bindings = this._bindings,
					nBindings = bindings.length;
			var knownObject = undefined,
					nObjects = objects.length,
					nCachedObjects = this.nCachedObjects_;

			for (var i = 0, n = arguments.length; i !== n; ++i) {
				var object = arguments[i],
						uuid = object.uuid;
				var index = indicesByUUID[uuid];

				if (index === undefined) {
					// unknown object -> add it to the ACTIVE region
					index = nObjects++;
					indicesByUUID[uuid] = index;
					objects.push(object); // accounting is done, now do the same for all bindings

					for (var j = 0, m = nBindings; j !== m; ++j) {
						bindings[j].push(new PropertyBinding(object, paths[j], parsedPaths[j]));
					}
				} else if (index < nCachedObjects) {
					knownObject = objects[index]; // move existing object to the ACTIVE region

					var firstActiveIndex = --nCachedObjects,
							lastCachedObject = objects[firstActiveIndex];
					indicesByUUID[lastCachedObject.uuid] = index;
					objects[index] = lastCachedObject;
					indicesByUUID[uuid] = firstActiveIndex;
					objects[firstActiveIndex] = object; // accounting is done, now do the same for all bindings

					for (var _j = 0, _m = nBindings; _j !== _m; ++_j) {
						var bindingsForPath = bindings[_j],
								lastCached = bindingsForPath[firstActiveIndex];
						var binding = bindingsForPath[index];
						bindingsForPath[index] = lastCached;

						if (binding === undefined) {
							// since we do not bother to create new bindings
							// for objects that are cached, the binding may
							// or may not exist
							binding = new PropertyBinding(object, paths[_j], parsedPaths[_j]);
						}

						bindingsForPath[firstActiveIndex] = binding;
					}
				} else if (objects[index] !== knownObject) {
					console.error('THREE.AnimationObjectGroup: Different objects with the same UUID ' + 'detected. Clean the caches or recreate your infrastructure when reloading scenes.');
				} // else the object is already where we want it to be

			} // for arguments


			this.nCachedObjects_ = nCachedObjects;
		},
		remove: function remove() {
			var objects = this._objects,
					indicesByUUID = this._indicesByUUID,
					bindings = this._bindings,
					nBindings = bindings.length;
			var nCachedObjects = this.nCachedObjects_;

			for (var i = 0, n = arguments.length; i !== n; ++i) {
				var object = arguments[i],
						uuid = object.uuid,
						index = indicesByUUID[uuid];

				if (index !== undefined && index >= nCachedObjects) {
					// move existing object into the CACHED region
					var lastCachedIndex = nCachedObjects++,
							firstActiveObject = objects[lastCachedIndex];
					indicesByUUID[firstActiveObject.uuid] = index;
					objects[index] = firstActiveObject;
					indicesByUUID[uuid] = lastCachedIndex;
					objects[lastCachedIndex] = object; // accounting is done, now do the same for all bindings

					for (var j = 0, m = nBindings; j !== m; ++j) {
						var bindingsForPath = bindings[j],
								firstActive = bindingsForPath[lastCachedIndex],
								binding = bindingsForPath[index];
						bindingsForPath[index] = firstActive;
						bindingsForPath[lastCachedIndex] = binding;
					}
				}
			} // for arguments


			this.nCachedObjects_ = nCachedObjects;
		},
		// remove & forget
		uncache: function uncache() {
			var objects = this._objects,
					indicesByUUID = this._indicesByUUID,
					bindings = this._bindings,
					nBindings = bindings.length;
			var nCachedObjects = this.nCachedObjects_,
					nObjects = objects.length;

			for (var i = 0, n = arguments.length; i !== n; ++i) {
				var object = arguments[i],
						uuid = object.uuid,
						index = indicesByUUID[uuid];

				if (index !== undefined) {
					delete indicesByUUID[uuid];

					if (index < nCachedObjects) {
						// object is cached, shrink the CACHED region
						var firstActiveIndex = --nCachedObjects,
								lastCachedObject = objects[firstActiveIndex],
								lastIndex = --nObjects,
								lastObject = objects[lastIndex]; // last cached object takes this object's place

						indicesByUUID[lastCachedObject.uuid] = index;
						objects[index] = lastCachedObject; // last object goes to the activated slot and pop

						indicesByUUID[lastObject.uuid] = firstActiveIndex;
						objects[firstActiveIndex] = lastObject;
						objects.pop(); // accounting is done, now do the same for all bindings

						for (var j = 0, m = nBindings; j !== m; ++j) {
							var bindingsForPath = bindings[j],
									lastCached = bindingsForPath[firstActiveIndex],
									last = bindingsForPath[lastIndex];
							bindingsForPath[index] = lastCached;
							bindingsForPath[firstActiveIndex] = last;
							bindingsForPath.pop();
						}
					} else {
						// object is active, just swap with the last and pop
						var _lastIndex = --nObjects,
								_lastObject = objects[_lastIndex];

						if (_lastIndex > 0) {
							indicesByUUID[_lastObject.uuid] = index;
						}

						objects[index] = _lastObject;
						objects.pop(); // accounting is done, now do the same for all bindings

						for (var _j2 = 0, _m2 = nBindings; _j2 !== _m2; ++_j2) {
							var _bindingsForPath = bindings[_j2];
							_bindingsForPath[index] = _bindingsForPath[_lastIndex];

							_bindingsForPath.pop();
						}
					} // cached or active

				} // if object is known

			} // for arguments


			this.nCachedObjects_ = nCachedObjects;
		},
		// Internal interface used by befriended PropertyBinding.Composite:
		subscribe_: function subscribe_(path, parsedPath) {
			// returns an array of bindings for the given path that is changed
			// according to the contained objects in the group
			var indicesByPath = this._bindingsIndicesByPath;
			var index = indicesByPath[path];
			var bindings = this._bindings;
			if (index !== undefined) return bindings[index];
			var paths = this._paths,
					parsedPaths = this._parsedPaths,
					objects = this._objects,
					nObjects = objects.length,
					nCachedObjects = this.nCachedObjects_,
					bindingsForPath = new Array(nObjects);
			index = bindings.length;
			indicesByPath[path] = index;
			paths.push(path);
			parsedPaths.push(parsedPath);
			bindings.push(bindingsForPath);

			for (var i = nCachedObjects, n = objects.length; i !== n; ++i) {
				var object = objects[i];
				bindingsForPath[i] = new PropertyBinding(object, path, parsedPath);
			}

			return bindingsForPath;
		},
		unsubscribe_: function unsubscribe_(path) {
			// tells the group to forget about a property path and no longer
			// update the array previously obtained with 'subscribe_'
			var indicesByPath = this._bindingsIndicesByPath,
					index = indicesByPath[path];

			if (index !== undefined) {
				var paths = this._paths,
						parsedPaths = this._parsedPaths,
						bindings = this._bindings,
						lastBindingsIndex = bindings.length - 1,
						lastBindings = bindings[lastBindingsIndex],
						lastBindingsPath = path[lastBindingsIndex];
				indicesByPath[lastBindingsPath] = index;
				bindings[index] = lastBindings;
				bindings.pop();
				parsedPaths[index] = parsedPaths[lastBindingsIndex];
				parsedPaths.pop();
				paths[index] = paths[lastBindingsIndex];
				paths.pop();
			}
		}
	});

	var AnimationAction = /*#__PURE__*/function () {
		function AnimationAction(mixer, clip, localRoot, blendMode) {
			if (localRoot === void 0) {
				localRoot = null;
			}

			if (blendMode === void 0) {
				blendMode = clip.blendMode;
			}

			this._mixer = mixer;
			this._clip = clip;
			this._localRoot = localRoot;
			this.blendMode = blendMode;
			var tracks = clip.tracks,
					nTracks = tracks.length,
					interpolants = new Array(nTracks);
			var interpolantSettings = {
				endingStart: ZeroCurvatureEnding,
				endingEnd: ZeroCurvatureEnding
			};

			for (var i = 0; i !== nTracks; ++i) {
				var interpolant = tracks[i].createInterpolant(null);
				interpolants[i] = interpolant;
				interpolant.settings = interpolantSettings;
			}

			this._interpolantSettings = interpolantSettings;
			this._interpolants = interpolants; // bound by the mixer
			// inside: PropertyMixer (managed by the mixer)

			this._propertyBindings = new Array(nTracks);
			this._cacheIndex = null; // for the memory manager

			this._byClipCacheIndex = null; // for the memory manager

			this._timeScaleInterpolant = null;
			this._weightInterpolant = null;
			this.loop = LoopRepeat;
			this._loopCount = -1; // global mixer time when the action is to be started
			// it's set back to 'null' upon start of the action

			this._startTime = null; // scaled local time of the action
			// gets clamped or wrapped to 0..clip.duration according to loop

			this.time = 0;
			this.timeScale = 1;
			this._effectiveTimeScale = 1;
			this.weight = 1;
			this._effectiveWeight = 1;
			this.repetitions = Infinity; // no. of repetitions when looping

			this.paused = false; // true -> zero effective time scale

			this.enabled = true; // false -> zero effective weight

			this.clampWhenFinished = false; // keep feeding the last frame?

			this.zeroSlopeAtStart = true; // for smooth interpolation w/o separate

			this.zeroSlopeAtEnd = true; // clips for start, loop and end
		} // State & Scheduling


		var _proto = AnimationAction.prototype;

		_proto.play = function play() {
			this._mixer._activateAction(this);

			return this;
		};

		_proto.stop = function stop() {
			this._mixer._deactivateAction(this);

			return this.reset();
		};

		_proto.reset = function reset() {
			this.paused = false;
			this.enabled = true;
			this.time = 0; // restart clip

			this._loopCount = -1; // forget previous loops

			this._startTime = null; // forget scheduling

			return this.stopFading().stopWarping();
		};

		_proto.isRunning = function isRunning() {
			return this.enabled && !this.paused && this.timeScale !== 0 && this._startTime === null && this._mixer._isActiveAction(this);
		} // return true when play has been called
		;

		_proto.isScheduled = function isScheduled() {
			return this._mixer._isActiveAction(this);
		};

		_proto.startAt = function startAt(time) {
			this._startTime = time;
			return this;
		};

		_proto.setLoop = function setLoop(mode, repetitions) {
			this.loop = mode;
			this.repetitions = repetitions;
			return this;
		} // Weight
		// set the weight stopping any scheduled fading
		// although .enabled = false yields an effective weight of zero, this
		// method does *not* change .enabled, because it would be confusing
		;

		_proto.setEffectiveWeight = function setEffectiveWeight(weight) {
			this.weight = weight; // note: same logic as when updated at runtime

			this._effectiveWeight = this.enabled ? weight : 0;
			return this.stopFading();
		} // return the weight considering fading and .enabled
		;

		_proto.getEffectiveWeight = function getEffectiveWeight() {
			return this._effectiveWeight;
		};

		_proto.fadeIn = function fadeIn(duration) {
			return this._scheduleFading(duration, 0, 1);
		};

		_proto.fadeOut = function fadeOut(duration) {
			return this._scheduleFading(duration, 1, 0);
		};

		_proto.crossFadeFrom = function crossFadeFrom(fadeOutAction, duration, warp) {
			fadeOutAction.fadeOut(duration);
			this.fadeIn(duration);

			if (warp) {
				var fadeInDuration = this._clip.duration,
						fadeOutDuration = fadeOutAction._clip.duration,
						startEndRatio = fadeOutDuration / fadeInDuration,
						endStartRatio = fadeInDuration / fadeOutDuration;
				fadeOutAction.warp(1.0, startEndRatio, duration);
				this.warp(endStartRatio, 1.0, duration);
			}

			return this;
		};

		_proto.crossFadeTo = function crossFadeTo(fadeInAction, duration, warp) {
			return fadeInAction.crossFadeFrom(this, duration, warp);
		};

		_proto.stopFading = function stopFading() {
			var weightInterpolant = this._weightInterpolant;

			if (weightInterpolant !== null) {
				this._weightInterpolant = null;

				this._mixer._takeBackControlInterpolant(weightInterpolant);
			}

			return this;
		} // Time Scale Control
		// set the time scale stopping any scheduled warping
		// although .paused = true yields an effective time scale of zero, this
		// method does *not* change .paused, because it would be confusing
		;

		_proto.setEffectiveTimeScale = function setEffectiveTimeScale(timeScale) {
			this.timeScale = timeScale;
			this._effectiveTimeScale = this.paused ? 0 : timeScale;
			return this.stopWarping();
		} // return the time scale considering warping and .paused
		;

		_proto.getEffectiveTimeScale = function getEffectiveTimeScale() {
			return this._effectiveTimeScale;
		};

		_proto.setDuration = function setDuration(duration) {
			this.timeScale = this._clip.duration / duration;
			return this.stopWarping();
		};

		_proto.syncWith = function syncWith(action) {
			this.time = action.time;
			this.timeScale = action.timeScale;
			return this.stopWarping();
		};

		_proto.halt = function halt(duration) {
			return this.warp(this._effectiveTimeScale, 0, duration);
		};

		_proto.warp = function warp(startTimeScale, endTimeScale, duration) {
			var mixer = this._mixer,
					now = mixer.time,
					timeScale = this.timeScale;
			var interpolant = this._timeScaleInterpolant;

			if (interpolant === null) {
				interpolant = mixer._lendControlInterpolant();
				this._timeScaleInterpolant = interpolant;
			}

			var times = interpolant.parameterPositions,
					values = interpolant.sampleValues;
			times[0] = now;
			times[1] = now + duration;
			values[0] = startTimeScale / timeScale;
			values[1] = endTimeScale / timeScale;
			return this;
		};

		_proto.stopWarping = function stopWarping() {
			var timeScaleInterpolant = this._timeScaleInterpolant;

			if (timeScaleInterpolant !== null) {
				this._timeScaleInterpolant = null;

				this._mixer._takeBackControlInterpolant(timeScaleInterpolant);
			}

			return this;
		} // Object Accessors
		;

		_proto.getMixer = function getMixer() {
			return this._mixer;
		};

		_proto.getClip = function getClip() {
			return this._clip;
		};

		_proto.getRoot = function getRoot() {
			return this._localRoot || this._mixer._root;
		} // Interna
		;

		_proto._update = function _update(time, deltaTime, timeDirection, accuIndex) {
			// called by the mixer
			if (!this.enabled) {
				// call ._updateWeight() to update ._effectiveWeight
				this._updateWeight(time);

				return;
			}

			var startTime = this._startTime;

			if (startTime !== null) {
				// check for scheduled start of action
				var timeRunning = (time - startTime) * timeDirection;

				if (timeRunning < 0 || timeDirection === 0) {
					return; // yet to come / don't decide when delta = 0
				} // start


				this._startTime = null; // unschedule

				deltaTime = timeDirection * timeRunning;
			} // apply time scale and advance time


			deltaTime *= this._updateTimeScale(time);

			var clipTime = this._updateTime(deltaTime); // note: _updateTime may disable the action resulting in
			// an effective weight of 0


			var weight = this._updateWeight(time);

			if (weight > 0) {
				var _interpolants = this._interpolants;
				var propertyMixers = this._propertyBindings;

				switch (this.blendMode) {
					case AdditiveAnimationBlendMode:
						for (var j = 0, m = _interpolants.length; j !== m; ++j) {
							_interpolants[j].evaluate(clipTime);

							propertyMixers[j].accumulateAdditive(weight);
						}

						break;

					case NormalAnimationBlendMode:
					default:
						for (var _j = 0, _m = _interpolants.length; _j !== _m; ++_j) {
							_interpolants[_j].evaluate(clipTime);

							propertyMixers[_j].accumulate(accuIndex, weight);
						}

				}
			}
		};

		_proto._updateWeight = function _updateWeight(time) {
			var weight = 0;

			if (this.enabled) {
				weight = this.weight;
				var interpolant = this._weightInterpolant;

				if (interpolant !== null) {
					var interpolantValue = interpolant.evaluate(time)[0];
					weight *= interpolantValue;

					if (time > interpolant.parameterPositions[1]) {
						this.stopFading();

						if (interpolantValue === 0) {
							// faded out, disable
							this.enabled = false;
						}
					}
				}
			}

			this._effectiveWeight = weight;
			return weight;
		};

		_proto._updateTimeScale = function _updateTimeScale(time) {
			var timeScale = 0;

			if (!this.paused) {
				timeScale = this.timeScale;
				var interpolant = this._timeScaleInterpolant;

				if (interpolant !== null) {
					var interpolantValue = interpolant.evaluate(time)[0];
					timeScale *= interpolantValue;

					if (time > interpolant.parameterPositions[1]) {
						this.stopWarping();

						if (timeScale === 0) {
							// motion has halted, pause
							this.paused = true;
						} else {
							// warp done - apply final time scale
							this.timeScale = timeScale;
						}
					}
				}
			}

			this._effectiveTimeScale = timeScale;
			return timeScale;
		};

		_proto._updateTime = function _updateTime(deltaTime) {
			var duration = this._clip.duration;
			var loop = this.loop;
			var time = this.time + deltaTime;
			var loopCount = this._loopCount;
			var pingPong = loop === LoopPingPong;

			if (deltaTime === 0) {
				if (loopCount === -1) return time;
				return pingPong && (loopCount & 1) === 1 ? duration - time : time;
			}

			if (loop === LoopOnce) {
				if (loopCount === -1) {
					// just started
					this._loopCount = 0;

					this._setEndings(true, true, false);
				}

				handle_stop: {
					if (time >= duration) {
						time = duration;
					} else if (time < 0) {
						time = 0;
					} else {
						this.time = time;
						break handle_stop;
					}

					if (this.clampWhenFinished) this.paused = true;else this.enabled = false;
					this.time = time;

					this._mixer.dispatchEvent({
						type: 'finished',
						action: this,
						direction: deltaTime < 0 ? -1 : 1
					});
				}
			} else {
				// repetitive Repeat or PingPong
				if (loopCount === -1) {
					// just started
					if (deltaTime >= 0) {
						loopCount = 0;

						this._setEndings(true, this.repetitions === 0, pingPong);
					} else {
						// when looping in reverse direction, the initial
						// transition through zero counts as a repetition,
						// so leave loopCount at -1
						this._setEndings(this.repetitions === 0, true, pingPong);
					}
				}

				if (time >= duration || time < 0) {
					// wrap around
					var loopDelta = Math.floor(time / duration); // signed

					time -= duration * loopDelta;
					loopCount += Math.abs(loopDelta);
					var pending = this.repetitions - loopCount;

					if (pending <= 0) {
						// have to stop (switch state, clamp time, fire event)
						if (this.clampWhenFinished) this.paused = true;else this.enabled = false;
						time = deltaTime > 0 ? duration : 0;
						this.time = time;

						this._mixer.dispatchEvent({
							type: 'finished',
							action: this,
							direction: deltaTime > 0 ? 1 : -1
						});
					} else {
						// keep running
						if (pending === 1) {
							// entering the last round
							var atStart = deltaTime < 0;

							this._setEndings(atStart, !atStart, pingPong);
						} else {
							this._setEndings(false, false, pingPong);
						}

						this._loopCount = loopCount;
						this.time = time;

						this._mixer.dispatchEvent({
							type: 'loop',
							action: this,
							loopDelta: loopDelta
						});
					}
				} else {
					this.time = time;
				}

				if (pingPong && (loopCount & 1) === 1) {
					// invert time for the "pong round"
					return duration - time;
				}
			}

			return time;
		};

		_proto._setEndings = function _setEndings(atStart, atEnd, pingPong) {
			var settings = this._interpolantSettings;

			if (pingPong) {
				settings.endingStart = ZeroSlopeEnding;
				settings.endingEnd = ZeroSlopeEnding;
			} else {
				// assuming for LoopOnce atStart == atEnd == true
				if (atStart) {
					settings.endingStart = this.zeroSlopeAtStart ? ZeroSlopeEnding : ZeroCurvatureEnding;
				} else {
					settings.endingStart = WrapAroundEnding;
				}

				if (atEnd) {
					settings.endingEnd = this.zeroSlopeAtEnd ? ZeroSlopeEnding : ZeroCurvatureEnding;
				} else {
					settings.endingEnd = WrapAroundEnding;
				}
			}
		};

		_proto._scheduleFading = function _scheduleFading(duration, weightNow, weightThen) {
			var mixer = this._mixer,
					now = mixer.time;
			var interpolant = this._weightInterpolant;

			if (interpolant === null) {
				interpolant = mixer._lendControlInterpolant();
				this._weightInterpolant = interpolant;
			}

			var times = interpolant.parameterPositions,
					values = interpolant.sampleValues;
			times[0] = now;
			values[0] = weightNow;
			times[1] = now + duration;
			values[1] = weightThen;
			return this;
		};

		return AnimationAction;
	}();

	function AnimationMixer(root) {
		this._root = root;

		this._initMemoryManager();

		this._accuIndex = 0;
		this.time = 0;
		this.timeScale = 1.0;
	}

	AnimationMixer.prototype = Object.assign(Object.create(EventDispatcher.prototype), {
		constructor: AnimationMixer,
		_bindAction: function _bindAction(action, prototypeAction) {
			var root = action._localRoot || this._root,
					tracks = action._clip.tracks,
					nTracks = tracks.length,
					bindings = action._propertyBindings,
					interpolants = action._interpolants,
					rootUuid = root.uuid,
					bindingsByRoot = this._bindingsByRootAndName;
			var bindingsByName = bindingsByRoot[rootUuid];

			if (bindingsByName === undefined) {
				bindingsByName = {};
				bindingsByRoot[rootUuid] = bindingsByName;
			}

			for (var i = 0; i !== nTracks; ++i) {
				var track = tracks[i],
						trackName = track.name;
				var binding = bindingsByName[trackName];

				if (binding !== undefined) {
					bindings[i] = binding;
				} else {
					binding = bindings[i];

					if (binding !== undefined) {
						// existing binding, make sure the cache knows
						if (binding._cacheIndex === null) {
							++binding.referenceCount;

							this._addInactiveBinding(binding, rootUuid, trackName);
						}

						continue;
					}

					var path = prototypeAction && prototypeAction._propertyBindings[i].binding.parsedPath;
					binding = new PropertyMixer(PropertyBinding.create(root, trackName, path), track.ValueTypeName, track.getValueSize());
					++binding.referenceCount;

					this._addInactiveBinding(binding, rootUuid, trackName);

					bindings[i] = binding;
				}

				interpolants[i].resultBuffer = binding.buffer;
			}
		},
		_activateAction: function _activateAction(action) {
			if (!this._isActiveAction(action)) {
				if (action._cacheIndex === null) {
					// this action has been forgotten by the cache, but the user
					// appears to be still using it -> rebind
					var rootUuid = (action._localRoot || this._root).uuid,
							clipUuid = action._clip.uuid,
							actionsForClip = this._actionsByClip[clipUuid];

					this._bindAction(action, actionsForClip && actionsForClip.knownActions[0]);

					this._addInactiveAction(action, clipUuid, rootUuid);
				}

				var bindings = action._propertyBindings; // increment reference counts / sort out state

				for (var i = 0, n = bindings.length; i !== n; ++i) {
					var binding = bindings[i];

					if (binding.useCount++ === 0) {
						this._lendBinding(binding);

						binding.saveOriginalState();
					}
				}

				this._lendAction(action);
			}
		},
		_deactivateAction: function _deactivateAction(action) {
			if (this._isActiveAction(action)) {
				var bindings = action._propertyBindings; // decrement reference counts / sort out state

				for (var i = 0, n = bindings.length; i !== n; ++i) {
					var binding = bindings[i];

					if (--binding.useCount === 0) {
						binding.restoreOriginalState();

						this._takeBackBinding(binding);
					}
				}

				this._takeBackAction(action);
			}
		},
		// Memory manager
		_initMemoryManager: function _initMemoryManager() {
			this._actions = []; // 'nActiveActions' followed by inactive ones

			this._nActiveActions = 0;
			this._actionsByClip = {}; // inside:
			// {
			// 	knownActions: Array< AnimationAction > - used as prototypes
			// 	actionByRoot: AnimationAction - lookup
			// }

			this._bindings = []; // 'nActiveBindings' followed by inactive ones

			this._nActiveBindings = 0;
			this._bindingsByRootAndName = {}; // inside: Map< name, PropertyMixer >

			this._controlInterpolants = []; // same game as above

			this._nActiveControlInterpolants = 0;
			var scope = this;
			this.stats = {
				actions: {
					get total() {
						return scope._actions.length;
					},

					get inUse() {
						return scope._nActiveActions;
					}

				},
				bindings: {
					get total() {
						return scope._bindings.length;
					},

					get inUse() {
						return scope._nActiveBindings;
					}

				},
				controlInterpolants: {
					get total() {
						return scope._controlInterpolants.length;
					},

					get inUse() {
						return scope._nActiveControlInterpolants;
					}

				}
			};
		},
		// Memory management for AnimationAction objects
		_isActiveAction: function _isActiveAction(action) {
			var index = action._cacheIndex;
			return index !== null && index < this._nActiveActions;
		},
		_addInactiveAction: function _addInactiveAction(action, clipUuid, rootUuid) {
			var actions = this._actions,
					actionsByClip = this._actionsByClip;
			var actionsForClip = actionsByClip[clipUuid];

			if (actionsForClip === undefined) {
				actionsForClip = {
					knownActions: [action],
					actionByRoot: {}
				};
				action._byClipCacheIndex = 0;
				actionsByClip[clipUuid] = actionsForClip;
			} else {
				var knownActions = actionsForClip.knownActions;
				action._byClipCacheIndex = knownActions.length;
				knownActions.push(action);
			}

			action._cacheIndex = actions.length;
			actions.push(action);
			actionsForClip.actionByRoot[rootUuid] = action;
		},
		_removeInactiveAction: function _removeInactiveAction(action) {
			var actions = this._actions,
					lastInactiveAction = actions[actions.length - 1],
					cacheIndex = action._cacheIndex;
			lastInactiveAction._cacheIndex = cacheIndex;
			actions[cacheIndex] = lastInactiveAction;
			actions.pop();
			action._cacheIndex = null;
			var clipUuid = action._clip.uuid,
					actionsByClip = this._actionsByClip,
					actionsForClip = actionsByClip[clipUuid],
					knownActionsForClip = actionsForClip.knownActions,
					lastKnownAction = knownActionsForClip[knownActionsForClip.length - 1],
					byClipCacheIndex = action._byClipCacheIndex;
			lastKnownAction._byClipCacheIndex = byClipCacheIndex;
			knownActionsForClip[byClipCacheIndex] = lastKnownAction;
			knownActionsForClip.pop();
			action._byClipCacheIndex = null;
			var actionByRoot = actionsForClip.actionByRoot,
					rootUuid = (action._localRoot || this._root).uuid;
			delete actionByRoot[rootUuid];

			if (knownActionsForClip.length === 0) {
				delete actionsByClip[clipUuid];
			}

			this._removeInactiveBindingsForAction(action);
		},
		_removeInactiveBindingsForAction: function _removeInactiveBindingsForAction(action) {
			var bindings = action._propertyBindings;

			for (var i = 0, n = bindings.length; i !== n; ++i) {
				var binding = bindings[i];

				if (--binding.referenceCount === 0) {
					this._removeInactiveBinding(binding);
				}
			}
		},
		_lendAction: function _lendAction(action) {
			// [ active actions |	inactive actions	]
			// [	active actions >| inactive actions ]
			//								 s				a
			//									<-swap->
			//								 a				s
			var actions = this._actions,
					prevIndex = action._cacheIndex,
					lastActiveIndex = this._nActiveActions++,
					firstInactiveAction = actions[lastActiveIndex];
			action._cacheIndex = lastActiveIndex;
			actions[lastActiveIndex] = action;
			firstInactiveAction._cacheIndex = prevIndex;
			actions[prevIndex] = firstInactiveAction;
		},
		_takeBackAction: function _takeBackAction(action) {
			// [	active actions	| inactive actions ]
			// [ active actions |< inactive actions	]
			//				a				s
			//				 <-swap->
			//				s				a
			var actions = this._actions,
					prevIndex = action._cacheIndex,
					firstInactiveIndex = --this._nActiveActions,
					lastActiveAction = actions[firstInactiveIndex];
			action._cacheIndex = firstInactiveIndex;
			actions[firstInactiveIndex] = action;
			lastActiveAction._cacheIndex = prevIndex;
			actions[prevIndex] = lastActiveAction;
		},
		// Memory management for PropertyMixer objects
		_addInactiveBinding: function _addInactiveBinding(binding, rootUuid, trackName) {
			var bindingsByRoot = this._bindingsByRootAndName,
					bindings = this._bindings;
			var bindingByName = bindingsByRoot[rootUuid];

			if (bindingByName === undefined) {
				bindingByName = {};
				bindingsByRoot[rootUuid] = bindingByName;
			}

			bindingByName[trackName] = binding;
			binding._cacheIndex = bindings.length;
			bindings.push(binding);
		},
		_removeInactiveBinding: function _removeInactiveBinding(binding) {
			var bindings = this._bindings,
					propBinding = binding.binding,
					rootUuid = propBinding.rootNode.uuid,
					trackName = propBinding.path,
					bindingsByRoot = this._bindingsByRootAndName,
					bindingByName = bindingsByRoot[rootUuid],
					lastInactiveBinding = bindings[bindings.length - 1],
					cacheIndex = binding._cacheIndex;
			lastInactiveBinding._cacheIndex = cacheIndex;
			bindings[cacheIndex] = lastInactiveBinding;
			bindings.pop();
			delete bindingByName[trackName];

			if (Object.keys(bindingByName).length === 0) {
				delete bindingsByRoot[rootUuid];
			}
		},
		_lendBinding: function _lendBinding(binding) {
			var bindings = this._bindings,
					prevIndex = binding._cacheIndex,
					lastActiveIndex = this._nActiveBindings++,
					firstInactiveBinding = bindings[lastActiveIndex];
			binding._cacheIndex = lastActiveIndex;
			bindings[lastActiveIndex] = binding;
			firstInactiveBinding._cacheIndex = prevIndex;
			bindings[prevIndex] = firstInactiveBinding;
		},
		_takeBackBinding: function _takeBackBinding(binding) {
			var bindings = this._bindings,
					prevIndex = binding._cacheIndex,
					firstInactiveIndex = --this._nActiveBindings,
					lastActiveBinding = bindings[firstInactiveIndex];
			binding._cacheIndex = firstInactiveIndex;
			bindings[firstInactiveIndex] = binding;
			lastActiveBinding._cacheIndex = prevIndex;
			bindings[prevIndex] = lastActiveBinding;
		},
		// Memory management of Interpolants for weight and time scale
		_lendControlInterpolant: function _lendControlInterpolant() {
			var interpolants = this._controlInterpolants,
					lastActiveIndex = this._nActiveControlInterpolants++;
			var interpolant = interpolants[lastActiveIndex];

			if (interpolant === undefined) {
				interpolant = new LinearInterpolant(new Float32Array(2), new Float32Array(2), 1, this._controlInterpolantsResultBuffer);
				interpolant.__cacheIndex = lastActiveIndex;
				interpolants[lastActiveIndex] = interpolant;
			}

			return interpolant;
		},
		_takeBackControlInterpolant: function _takeBackControlInterpolant(interpolant) {
			var interpolants = this._controlInterpolants,
					prevIndex = interpolant.__cacheIndex,
					firstInactiveIndex = --this._nActiveControlInterpolants,
					lastActiveInterpolant = interpolants[firstInactiveIndex];
			interpolant.__cacheIndex = firstInactiveIndex;
			interpolants[firstInactiveIndex] = interpolant;
			lastActiveInterpolant.__cacheIndex = prevIndex;
			interpolants[prevIndex] = lastActiveInterpolant;
		},
		_controlInterpolantsResultBuffer: new Float32Array(1),
		// return an action for a clip optionally using a custom root target
		// object (this method allocates a lot of dynamic memory in case a
		// previously unknown clip/root combination is specified)
		clipAction: function clipAction(clip, optionalRoot, blendMode) {
			var root = optionalRoot || this._root,
					rootUuid = root.uuid;
			var clipObject = typeof clip === 'string' ? AnimationClip.findByName(root, clip) : clip;
			var clipUuid = clipObject !== null ? clipObject.uuid : clip;
			var actionsForClip = this._actionsByClip[clipUuid];
			var prototypeAction = null;

			if (blendMode === undefined) {
				if (clipObject !== null) {
					blendMode = clipObject.blendMode;
				} else {
					blendMode = NormalAnimationBlendMode;
				}
			}

			if (actionsForClip !== undefined) {
				var existingAction = actionsForClip.actionByRoot[rootUuid];

				if (existingAction !== undefined && existingAction.blendMode === blendMode) {
					return existingAction;
				} // we know the clip, so we don't have to parse all
				// the bindings again but can just copy


				prototypeAction = actionsForClip.knownActions[0]; // also, take the clip from the prototype action

				if (clipObject === null) clipObject = prototypeAction._clip;
			} // clip must be known when specified via string


			if (clipObject === null) return null; // allocate all resources required to run it

			var newAction = new AnimationAction(this, clipObject, optionalRoot, blendMode);

			this._bindAction(newAction, prototypeAction); // and make the action known to the memory manager


			this._addInactiveAction(newAction, clipUuid, rootUuid);

			return newAction;
		},
		// get an existing action
		existingAction: function existingAction(clip, optionalRoot) {
			var root = optionalRoot || this._root,
					rootUuid = root.uuid,
					clipObject = typeof clip === 'string' ? AnimationClip.findByName(root, clip) : clip,
					clipUuid = clipObject ? clipObject.uuid : clip,
					actionsForClip = this._actionsByClip[clipUuid];

			if (actionsForClip !== undefined) {
				return actionsForClip.actionByRoot[rootUuid] || null;
			}

			return null;
		},
		// deactivates all previously scheduled actions
		stopAllAction: function stopAllAction() {
			var actions = this._actions,
					nActions = this._nActiveActions;

			for (var i = nActions - 1; i >= 0; --i) {
				actions[i].stop();
			}

			return this;
		},
		// advance the time and update apply the animation
		update: function update(deltaTime) {
			deltaTime *= this.timeScale;
			var actions = this._actions,
					nActions = this._nActiveActions,
					time = this.time += deltaTime,
					timeDirection = Math.sign(deltaTime),
					accuIndex = this._accuIndex ^= 1; // run active actions

			for (var i = 0; i !== nActions; ++i) {
				var action = actions[i];

				action._update(time, deltaTime, timeDirection, accuIndex);
			} // update scene graph


			var bindings = this._bindings,
					nBindings = this._nActiveBindings;

			for (var _i = 0; _i !== nBindings; ++_i) {
				bindings[_i].apply(accuIndex);
			}

			return this;
		},
		// Allows you to seek to a specific time in an animation.
		setTime: function setTime(timeInSeconds) {
			this.time = 0; // Zero out time attribute for AnimationMixer object;

			for (var i = 0; i < this._actions.length; i++) {
				this._actions[i].time = 0; // Zero out time attribute for all associated AnimationAction objects.
			}

			return this.update(timeInSeconds); // Update used to set exact time. Returns "this" AnimationMixer object.
		},
		// return this mixer's root target object
		getRoot: function getRoot() {
			return this._root;
		},
		// free all resources specific to a particular clip
		uncacheClip: function uncacheClip(clip) {
			var actions = this._actions,
					clipUuid = clip.uuid,
					actionsByClip = this._actionsByClip,
					actionsForClip = actionsByClip[clipUuid];

			if (actionsForClip !== undefined) {
				// note: just calling _removeInactiveAction would mess up the
				// iteration state and also require updating the state we can
				// just throw away
				var actionsToRemove = actionsForClip.knownActions;

				for (var i = 0, n = actionsToRemove.length; i !== n; ++i) {
					var action = actionsToRemove[i];

					this._deactivateAction(action);

					var cacheIndex = action._cacheIndex,
							lastInactiveAction = actions[actions.length - 1];
					action._cacheIndex = null;
					action._byClipCacheIndex = null;
					lastInactiveAction._cacheIndex = cacheIndex;
					actions[cacheIndex] = lastInactiveAction;
					actions.pop();

					this._removeInactiveBindingsForAction(action);
				}

				delete actionsByClip[clipUuid];
			}
		},
		// free all resources specific to a particular root target object
		uncacheRoot: function uncacheRoot(root) {
			var rootUuid = root.uuid,
					actionsByClip = this._actionsByClip;

			for (var clipUuid in actionsByClip) {
				var actionByRoot = actionsByClip[clipUuid].actionByRoot,
						action = actionByRoot[rootUuid];

				if (action !== undefined) {
					this._deactivateAction(action);

					this._removeInactiveAction(action);
				}
			}

			var bindingsByRoot = this._bindingsByRootAndName,
					bindingByName = bindingsByRoot[rootUuid];

			if (bindingByName !== undefined) {
				for (var trackName in bindingByName) {
					var binding = bindingByName[trackName];
					binding.restoreOriginalState();

					this._removeInactiveBinding(binding);
				}
			}
		},
		// remove a targeted clip from the cache
		uncacheAction: function uncacheAction(clip, optionalRoot) {
			var action = this.existingAction(clip, optionalRoot);

			if (action !== null) {
				this._deactivateAction(action);

				this._removeInactiveAction(action);
			}
		}
	});

	var Uniform = /*#__PURE__*/function () {
		function Uniform(value) {
			if (typeof value === 'string') {
				console.warn('THREE.Uniform: Type parameter is no longer needed.');
				value = arguments[1];
			}

			this.value = value;
		}

		var _proto = Uniform.prototype;

		_proto.clone = function clone() {
			return new Uniform(this.value.clone === undefined ? this.value : this.value.clone());
		};

		return Uniform;
	}();

	function InstancedInterleavedBuffer(array, stride, meshPerAttribute) {
		InterleavedBuffer.call(this, array, stride);
		this.meshPerAttribute = meshPerAttribute || 1;
	}

	InstancedInterleavedBuffer.prototype = Object.assign(Object.create(InterleavedBuffer.prototype), {
		constructor: InstancedInterleavedBuffer,
		isInstancedInterleavedBuffer: true,
		copy: function copy(source) {
			InterleavedBuffer.prototype.copy.call(this, source);
			this.meshPerAttribute = source.meshPerAttribute;
			return this;
		},
		clone: function clone(data) {
			var ib = InterleavedBuffer.prototype.clone.call(this, data);
			ib.meshPerAttribute = this.meshPerAttribute;
			return ib;
		},
		toJSON: function toJSON(data) {
			var json = InterleavedBuffer.prototype.toJSON.call(this, data);
			json.isInstancedInterleavedBuffer = true;
			json.meshPerAttribute = this.meshPerAttribute;
			return json;
		}
	});

	function GLBufferAttribute(buffer, type, itemSize, elementSize, count) {
		this.buffer = buffer;
		this.type = type;
		this.itemSize = itemSize;
		this.elementSize = elementSize;
		this.count = count;
		this.version = 0;
	}

	Object.defineProperty(GLBufferAttribute.prototype, 'needsUpdate', {
		set: function set(value) {
			if (value === true) this.version++;
		}
	});
	Object.assign(GLBufferAttribute.prototype, {
		isGLBufferAttribute: true,
		setBuffer: function setBuffer(buffer) {
			this.buffer = buffer;
			return this;
		},
		setType: function setType(type, elementSize) {
			this.type = type;
			this.elementSize = elementSize;
			return this;
		},
		setItemSize: function setItemSize(itemSize) {
			this.itemSize = itemSize;
			return this;
		},
		setCount: function setCount(count) {
			this.count = count;
			return this;
		}
	});

	function Raycaster(origin, direction, near, far) {
		this.ray = new Ray(origin, direction); // direction is assumed to be normalized (for accurate distance calculations)

		this.near = near || 0;
		this.far = far || Infinity;
		this.camera = null;
		this.layers = new Layers();
		this.params = {
			Mesh: {},
			Line: {
				threshold: 1
			},
			LOD: {},
			Points: {
				threshold: 1
			},
			Sprite: {}
		};
		Object.defineProperties(this.params, {
			PointCloud: {
				get: function get() {
					console.warn('THREE.Raycaster: params.PointCloud has been renamed to params.Points.');
					return this.Points;
				}
			}
		});
	}

	function ascSort(a, b) {
		return a.distance - b.distance;
	}

	function _intersectObject(object, raycaster, intersects, recursive) {
		if (object.layers.test(raycaster.layers)) {
			object.raycast(raycaster, intersects);
		}

		if (recursive === true) {
			var children = object.children;

			for (var i = 0, l = children.length; i < l; i++) {
				_intersectObject(children[i], raycaster, intersects, true);
			}
		}
	}

	Object.assign(Raycaster.prototype, {
		set: function set(origin, direction) {
			// direction is assumed to be normalized (for accurate distance calculations)
			this.ray.set(origin, direction);
		},
		setFromCamera: function setFromCamera(coords, camera) {
			if (camera && camera.isPerspectiveCamera) {
				this.ray.origin.setFromMatrixPosition(camera.matrixWorld);
				this.ray.direction.set(coords.x, coords.y, 0.5).unproject(camera).sub(this.ray.origin).normalize();
				this.camera = camera;
			} else if (camera && camera.isOrthographicCamera) {
				this.ray.origin.set(coords.x, coords.y, (camera.near + camera.far) / (camera.near - camera.far)).unproject(camera); // set origin in plane of camera

				this.ray.direction.set(0, 0, -1).transformDirection(camera.matrixWorld);
				this.camera = camera;
			} else {
				console.error('THREE.Raycaster: Unsupported camera type: ' + camera.type);
			}
		},
		intersectObject: function intersectObject(object, recursive, optionalTarget) {
			var intersects = optionalTarget || [];

			_intersectObject(object, this, intersects, recursive);

			intersects.sort(ascSort);
			return intersects;
		},
		intersectObjects: function intersectObjects(objects, recursive, optionalTarget) {
			var intersects = optionalTarget || [];

			if (Array.isArray(objects) === false) {
				console.warn('THREE.Raycaster.intersectObjects: objects is not an Array.');
				return intersects;
			}

			for (var i = 0, l = objects.length; i < l; i++) {
				_intersectObject(objects[i], this, intersects, recursive);
			}

			intersects.sort(ascSort);
			return intersects;
		}
	});

	/**
	 * Ref: https://en.wikipedia.org/wiki/Spherical_coordinate_system
	 *
	 * The polar angle (phi) is measured from the positive y-axis. The positive y-axis is up.
	 * The azimuthal angle (theta) is measured from the positive z-axis.
	 */

	var Spherical = /*#__PURE__*/function () {
		function Spherical(radius, phi, theta) {
			if (radius === void 0) {
				radius = 1;
			}

			if (phi === void 0) {
				phi = 0;
			}

			if (theta === void 0) {
				theta = 0;
			}

			this.radius = radius;
			this.phi = phi; // polar angle

			this.theta = theta; // azimuthal angle

			return this;
		}

		var _proto = Spherical.prototype;

		_proto.set = function set(radius, phi, theta) {
			this.radius = radius;
			this.phi = phi;
			this.theta = theta;
			return this;
		};

		_proto.clone = function clone() {
			return new this.constructor().copy(this);
		};

		_proto.copy = function copy(other) {
			this.radius = other.radius;
			this.phi = other.phi;
			this.theta = other.theta;
			return this;
		} // restrict phi to be betwee EPS and PI-EPS
		;

		_proto.makeSafe = function makeSafe() {
			var EPS = 0.000001;
			this.phi = Math.max(EPS, Math.min(Math.PI - EPS, this.phi));
			return this;
		};

		_proto.setFromVector3 = function setFromVector3(v) {
			return this.setFromCartesianCoords(v.x, v.y, v.z);
		};

		_proto.setFromCartesianCoords = function setFromCartesianCoords(x, y, z) {
			this.radius = Math.sqrt(x * x + y * y + z * z);

			if (this.radius === 0) {
				this.theta = 0;
				this.phi = 0;
			} else {
				this.theta = Math.atan2(x, z);
				this.phi = Math.acos(MathUtils.clamp(y / this.radius, -1, 1));
			}

			return this;
		};

		return Spherical;
	}();

	/**
	 * Ref: https://en.wikipedia.org/wiki/Cylindrical_coordinate_system
	 */
	var Cylindrical = /*#__PURE__*/function () {
		function Cylindrical(radius, theta, y) {
			this.radius = radius !== undefined ? radius : 1.0; // distance from the origin to a point in the x-z plane

			this.theta = theta !== undefined ? theta : 0; // counterclockwise angle in the x-z plane measured in radians from the positive z-axis

			this.y = y !== undefined ? y : 0; // height above the x-z plane

			return this;
		}

		var _proto = Cylindrical.prototype;

		_proto.set = function set(radius, theta, y) {
			this.radius = radius;
			this.theta = theta;
			this.y = y;
			return this;
		};

		_proto.clone = function clone() {
			return new this.constructor().copy(this);
		};

		_proto.copy = function copy(other) {
			this.radius = other.radius;
			this.theta = other.theta;
			this.y = other.y;
			return this;
		};

		_proto.setFromVector3 = function setFromVector3(v) {
			return this.setFromCartesianCoords(v.x, v.y, v.z);
		};

		_proto.setFromCartesianCoords = function setFromCartesianCoords(x, y, z) {
			this.radius = Math.sqrt(x * x + z * z);
			this.theta = Math.atan2(x, z);
			this.y = y;
			return this;
		};

		return Cylindrical;
	}();

	var _vector$8 = /*@__PURE__*/new Vector2();

	var Box2 = /*#__PURE__*/function () {
		function Box2(min, max) {
			Object.defineProperty(this, 'isBox2', {
				value: true
			});
			this.min = min !== undefined ? min : new Vector2(+Infinity, +Infinity);
			this.max = max !== undefined ? max : new Vector2(-Infinity, -Infinity);
		}

		var _proto = Box2.prototype;

		_proto.set = function set(min, max) {
			this.min.copy(min);
			this.max.copy(max);
			return this;
		};

		_proto.setFromPoints = function setFromPoints(points) {
			this.makeEmpty();

			for (var i = 0, il = points.length; i < il; i++) {
				this.expandByPoint(points[i]);
			}

			return this;
		};

		_proto.setFromCenterAndSize = function setFromCenterAndSize(center, size) {
			var halfSize = _vector$8.copy(size).multiplyScalar(0.5);

			this.min.copy(center).sub(halfSize);
			this.max.copy(center).add(halfSize);
			return this;
		};

		_proto.clone = function clone() {
			return new this.constructor().copy(this);
		};

		_proto.copy = function copy(box) {
			this.min.copy(box.min);
			this.max.copy(box.max);
			return this;
		};

		_proto.makeEmpty = function makeEmpty() {
			this.min.x = this.min.y = +Infinity;
			this.max.x = this.max.y = -Infinity;
			return this;
		};

		_proto.isEmpty = function isEmpty() {
			// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes
			return this.max.x < this.min.x || this.max.y < this.min.y;
		};

		_proto.getCenter = function getCenter(target) {
			if (target === undefined) {
				console.warn('THREE.Box2: .getCenter() target is now required');
				target = new Vector2();
			}

			return this.isEmpty() ? target.set(0, 0) : target.addVectors(this.min, this.max).multiplyScalar(0.5);
		};

		_proto.getSize = function getSize(target) {
			if (target === undefined) {
				console.warn('THREE.Box2: .getSize() target is now required');
				target = new Vector2();
			}

			return this.isEmpty() ? target.set(0, 0) : target.subVectors(this.max, this.min);
		};

		_proto.expandByPoint = function expandByPoint(point) {
			this.min.min(point);
			this.max.max(point);
			return this;
		};

		_proto.expandByVector = function expandByVector(vector) {
			this.min.sub(vector);
			this.max.add(vector);
			return this;
		};

		_proto.expandByScalar = function expandByScalar(scalar) {
			this.min.addScalar(-scalar);
			this.max.addScalar(scalar);
			return this;
		};

		_proto.containsPoint = function containsPoint(point) {
			return point.x < this.min.x || point.x > this.max.x || point.y < this.min.y || point.y > this.max.y ? false : true;
		};

		_proto.containsBox = function containsBox(box) {
			return this.min.x <= box.min.x && box.max.x <= this.max.x && this.min.y <= box.min.y && box.max.y <= this.max.y;
		};

		_proto.getParameter = function getParameter(point, target) {
			// This can potentially have a divide by zero if the box
			// has a size dimension of 0.
			if (target === undefined) {
				console.warn('THREE.Box2: .getParameter() target is now required');
				target = new Vector2();
			}

			return target.set((point.x - this.min.x) / (this.max.x - this.min.x), (point.y - this.min.y) / (this.max.y - this.min.y));
		};

		_proto.intersectsBox = function intersectsBox(box) {
			// using 4 splitting planes to rule out intersections
			return box.max.x < this.min.x || box.min.x > this.max.x || box.max.y < this.min.y || box.min.y > this.max.y ? false : true;
		};

		_proto.clampPoint = function clampPoint(point, target) {
			if (target === undefined) {
				console.warn('THREE.Box2: .clampPoint() target is now required');
				target = new Vector2();
			}

			return target.copy(point).clamp(this.min, this.max);
		};

		_proto.distanceToPoint = function distanceToPoint(point) {
			var clampedPoint = _vector$8.copy(point).clamp(this.min, this.max);

			return clampedPoint.sub(point).length();
		};

		_proto.intersect = function intersect(box) {
			this.min.max(box.min);
			this.max.min(box.max);
			return this;
		};

		_proto.union = function union(box) {
			this.min.min(box.min);
			this.max.max(box.max);
			return this;
		};

		_proto.translate = function translate(offset) {
			this.min.add(offset);
			this.max.add(offset);
			return this;
		};

		_proto.equals = function equals(box) {
			return box.min.equals(this.min) && box.max.equals(this.max);
		};

		return Box2;
	}();

	var _startP = /*@__PURE__*/new Vector3();

	var _startEnd = /*@__PURE__*/new Vector3();

	var Line3 = /*#__PURE__*/function () {
		function Line3(start, end) {
			this.start = start !== undefined ? start : new Vector3();
			this.end = end !== undefined ? end : new Vector3();
		}

		var _proto = Line3.prototype;

		_proto.set = function set(start, end) {
			this.start.copy(start);
			this.end.copy(end);
			return this;
		};

		_proto.clone = function clone() {
			return new this.constructor().copy(this);
		};

		_proto.copy = function copy(line) {
			this.start.copy(line.start);
			this.end.copy(line.end);
			return this;
		};

		_proto.getCenter = function getCenter(target) {
			if (target === undefined) {
				console.warn('THREE.Line3: .getCenter() target is now required');
				target = new Vector3();
			}

			return target.addVectors(this.start, this.end).multiplyScalar(0.5);
		};

		_proto.delta = function delta(target) {
			if (target === undefined) {
				console.warn('THREE.Line3: .delta() target is now required');
				target = new Vector3();
			}

			return target.subVectors(this.end, this.start);
		};

		_proto.distanceSq = function distanceSq() {
			return this.start.distanceToSquared(this.end);
		};

		_proto.distance = function distance() {
			return this.start.distanceTo(this.end);
		};

		_proto.at = function at(t, target) {
			if (target === undefined) {
				console.warn('THREE.Line3: .at() target is now required');
				target = new Vector3();
			}

			return this.delta(target).multiplyScalar(t).add(this.start);
		};

		_proto.closestPointToPointParameter = function closestPointToPointParameter(point, clampToLine) {
			_startP.subVectors(point, this.start);

			_startEnd.subVectors(this.end, this.start);

			var startEnd2 = _startEnd.dot(_startEnd);

			var startEnd_startP = _startEnd.dot(_startP);

			var t = startEnd_startP / startEnd2;

			if (clampToLine) {
				t = MathUtils.clamp(t, 0, 1);
			}

			return t;
		};

		_proto.closestPointToPoint = function closestPointToPoint(point, clampToLine, target) {
			var t = this.closestPointToPointParameter(point, clampToLine);

			if (target === undefined) {
				console.warn('THREE.Line3: .closestPointToPoint() target is now required');
				target = new Vector3();
			}

			return this.delta(target).multiplyScalar(t).add(this.start);
		};

		_proto.applyMatrix4 = function applyMatrix4(matrix) {
			this.start.applyMatrix4(matrix);
			this.end.applyMatrix4(matrix);
			return this;
		};

		_proto.equals = function equals(line) {
			return line.start.equals(this.start) && line.end.equals(this.end);
		};

		return Line3;
	}();

	function ImmediateRenderObject(material) {
		Object3D.call(this);
		this.material = material;

		this.render = function ()
		/* renderCallback */
		{};

		this.hasPositions = false;
		this.hasNormals = false;
		this.hasColors = false;
		this.hasUvs = false;
		this.positionArray = null;
		this.normalArray = null;
		this.colorArray = null;
		this.uvArray = null;
		this.count = 0;
	}

	ImmediateRenderObject.prototype = Object.create(Object3D.prototype);
	ImmediateRenderObject.prototype.constructor = ImmediateRenderObject;
	ImmediateRenderObject.prototype.isImmediateRenderObject = true;

	var _vector$9 = /*@__PURE__*/new Vector3();

	var SpotLightHelper = /*#__PURE__*/function (_Object3D) {
		_inheritsLoose(SpotLightHelper, _Object3D);

		function SpotLightHelper(light, color) {
			var _this;

			_this = _Object3D.call(this) || this;
			_this.light = light;

			_this.light.updateMatrixWorld();

			_this.matrix = light.matrixWorld;
			_this.matrixAutoUpdate = false;
			_this.color = color;
			var geometry = new BufferGeometry();
			var positions = [0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, -1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, -1, 1];

			for (var i = 0, j = 1, l = 32; i < l; i++, j++) {
				var p1 = i / l * Math.PI * 2;
				var p2 = j / l * Math.PI * 2;
				positions.push(Math.cos(p1), Math.sin(p1), 1, Math.cos(p2), Math.sin(p2), 1);
			}

			geometry.setAttribute('position', new Float32BufferAttribute(positions, 3));
			var material = new LineBasicMaterial({
				fog: false,
				toneMapped: false
			});
			_this.cone = new LineSegments(geometry, material);

			_this.add(_this.cone);

			_this.update();

			return _this;
		}

		var _proto = SpotLightHelper.prototype;

		_proto.dispose = function dispose() {
			this.cone.geometry.dispose();
			this.cone.material.dispose();
		};

		_proto.update = function update() {
			this.light.updateMatrixWorld();
			var coneLength = this.light.distance ? this.light.distance : 1000;
			var coneWidth = coneLength * Math.tan(this.light.angle);
			this.cone.scale.set(coneWidth, coneWidth, coneLength);

			_vector$9.setFromMatrixPosition(this.light.target.matrixWorld);

			this.cone.lookAt(_vector$9);

			if (this.color !== undefined) {
				this.cone.material.color.set(this.color);
			} else {
				this.cone.material.color.copy(this.light.color);
			}
		};

		return SpotLightHelper;
	}(Object3D);

	var _vector$a = /*@__PURE__*/new Vector3();

	var _boneMatrix = /*@__PURE__*/new Matrix4();

	var _matrixWorldInv = /*@__PURE__*/new Matrix4();

	var SkeletonHelper = /*#__PURE__*/function (_LineSegments) {
		_inheritsLoose(SkeletonHelper, _LineSegments);

		function SkeletonHelper(object) {
			var _this;

			var bones = getBoneList(object);
			var geometry = new BufferGeometry();
			var vertices = [];
			var colors = [];
			var color1 = new Color(0, 0, 1);
			var color2 = new Color(0, 1, 0);

			for (var i = 0; i < bones.length; i++) {
				var bone = bones[i];

				if (bone.parent && bone.parent.isBone) {
					vertices.push(0, 0, 0);
					vertices.push(0, 0, 0);
					colors.push(color1.r, color1.g, color1.b);
					colors.push(color2.r, color2.g, color2.b);
				}
			}

			geometry.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			geometry.setAttribute('color', new Float32BufferAttribute(colors, 3));
			var material = new LineBasicMaterial({
				vertexColors: true,
				depthTest: false,
				depthWrite: false,
				toneMapped: false,
				transparent: true
			});
			_this = _LineSegments.call(this, geometry, material) || this;
			_this.type = 'SkeletonHelper';
			_this.isSkeletonHelper = true;
			_this.root = object;
			_this.bones = bones;
			_this.matrix = object.matrixWorld;
			_this.matrixAutoUpdate = false;
			return _this;
		}

		var _proto = SkeletonHelper.prototype;

		_proto.updateMatrixWorld = function updateMatrixWorld(force) {
			var bones = this.bones;
			var geometry = this.geometry;
			var position = geometry.getAttribute('position');

			_matrixWorldInv.copy(this.root.matrixWorld).invert();

			for (var i = 0, j = 0; i < bones.length; i++) {
				var bone = bones[i];

				if (bone.parent && bone.parent.isBone) {
					_boneMatrix.multiplyMatrices(_matrixWorldInv, bone.matrixWorld);

					_vector$a.setFromMatrixPosition(_boneMatrix);

					position.setXYZ(j, _vector$a.x, _vector$a.y, _vector$a.z);

					_boneMatrix.multiplyMatrices(_matrixWorldInv, bone.parent.matrixWorld);

					_vector$a.setFromMatrixPosition(_boneMatrix);

					position.setXYZ(j + 1, _vector$a.x, _vector$a.y, _vector$a.z);
					j += 2;
				}
			}

			geometry.getAttribute('position').needsUpdate = true;

			_LineSegments.prototype.updateMatrixWorld.call(this, force);
		};

		return SkeletonHelper;
	}(LineSegments);

	function getBoneList(object) {
		var boneList = [];

		if (object && object.isBone) {
			boneList.push(object);
		}

		for (var i = 0; i < object.children.length; i++) {
			boneList.push.apply(boneList, getBoneList(object.children[i]));
		}

		return boneList;
	}

	var PointLightHelper = /*#__PURE__*/function (_Mesh) {
		_inheritsLoose(PointLightHelper, _Mesh);

		function PointLightHelper(light, sphereSize, color) {
			var _this;

			var geometry = new SphereGeometry(sphereSize, 4, 2);
			var material = new MeshBasicMaterial({
				wireframe: true,
				fog: false,
				toneMapped: false
			});
			_this = _Mesh.call(this, geometry, material) || this;
			_this.light = light;

			_this.light.updateMatrixWorld();

			_this.color = color;
			_this.type = 'PointLightHelper';
			_this.matrix = _this.light.matrixWorld;
			_this.matrixAutoUpdate = false;

			_this.update();
			/*
			// TODO: delete this comment?
			const distanceGeometry = new THREE.IcosahedronBufferGeometry( 1, 2 );
			const distanceMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false, wireframe: true, opacity: 0.1, transparent: true } );
				this.lightSphere = new THREE.Mesh( bulbGeometry, bulbMaterial );
			this.lightDistance = new THREE.Mesh( distanceGeometry, distanceMaterial );
				const d = light.distance;
				if ( d === 0.0 ) {
					this.lightDistance.visible = false;
				} else {
					this.lightDistance.scale.set( d, d, d );
				}
				this.add( this.lightDistance );
			*/


			return _this;
		}

		var _proto = PointLightHelper.prototype;

		_proto.dispose = function dispose() {
			this.geometry.dispose();
			this.material.dispose();
		};

		_proto.update = function update() {
			if (this.color !== undefined) {
				this.material.color.set(this.color);
			} else {
				this.material.color.copy(this.light.color);
			}
			/*
			const d = this.light.distance;
					if ( d === 0.0 ) {
						this.lightDistance.visible = false;
					} else {
						this.lightDistance.visible = true;
				this.lightDistance.scale.set( d, d, d );
					}
			*/

		};

		return PointLightHelper;
	}(Mesh);

	var _vector$b = /*@__PURE__*/new Vector3();

	var _color1 = /*@__PURE__*/new Color();

	var _color2 = /*@__PURE__*/new Color();

	var HemisphereLightHelper = /*#__PURE__*/function (_Object3D) {
		_inheritsLoose(HemisphereLightHelper, _Object3D);

		function HemisphereLightHelper(light, size, color) {
			var _this;

			_this = _Object3D.call(this) || this;
			_this.light = light;

			_this.light.updateMatrixWorld();

			_this.matrix = light.matrixWorld;
			_this.matrixAutoUpdate = false;
			_this.color = color;
			var geometry = new OctahedronGeometry(size);
			geometry.rotateY(Math.PI * 0.5);
			_this.material = new MeshBasicMaterial({
				wireframe: true,
				fog: false,
				toneMapped: false
			});
			if (_this.color === undefined) _this.material.vertexColors = true;
			var position = geometry.getAttribute('position');
			var colors = new Float32Array(position.count * 3);
			geometry.setAttribute('color', new BufferAttribute(colors, 3));

			_this.add(new Mesh(geometry, _this.material));

			_this.update();

			return _this;
		}

		var _proto = HemisphereLightHelper.prototype;

		_proto.dispose = function dispose() {
			this.children[0].geometry.dispose();
			this.children[0].material.dispose();
		};

		_proto.update = function update() {
			var mesh = this.children[0];

			if (this.color !== undefined) {
				this.material.color.set(this.color);
			} else {
				var colors = mesh.geometry.getAttribute('color');

				_color1.copy(this.light.color);

				_color2.copy(this.light.groundColor);

				for (var i = 0, l = colors.count; i < l; i++) {
					var color = i < l / 2 ? _color1 : _color2;
					colors.setXYZ(i, color.r, color.g, color.b);
				}

				colors.needsUpdate = true;
			}

			mesh.lookAt(_vector$b.setFromMatrixPosition(this.light.matrixWorld).negate());
		};

		return HemisphereLightHelper;
	}(Object3D);

	var GridHelper = /*#__PURE__*/function (_LineSegments) {
		_inheritsLoose(GridHelper, _LineSegments);

		function GridHelper(size, divisions, color1, color2) {
			var _this;

			if (size === void 0) {
				size = 10;
			}

			if (divisions === void 0) {
				divisions = 10;
			}

			if (color1 === void 0) {
				color1 = 0x444444;
			}

			if (color2 === void 0) {
				color2 = 0x888888;
			}

			color1 = new Color(color1);
			color2 = new Color(color2);
			var center = divisions / 2;
			var step = size / divisions;
			var halfSize = size / 2;
			var vertices = [],
					colors = [];

			for (var i = 0, j = 0, k = -halfSize; i <= divisions; i++, k += step) {
				vertices.push(-halfSize, 0, k, halfSize, 0, k);
				vertices.push(k, 0, -halfSize, k, 0, halfSize);
				var color = i === center ? color1 : color2;
				color.toArray(colors, j);
				j += 3;
				color.toArray(colors, j);
				j += 3;
				color.toArray(colors, j);
				j += 3;
				color.toArray(colors, j);
				j += 3;
			}

			var geometry = new BufferGeometry();
			geometry.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			geometry.setAttribute('color', new Float32BufferAttribute(colors, 3));
			var material = new LineBasicMaterial({
				vertexColors: true,
				toneMapped: false
			});
			_this = _LineSegments.call(this, geometry, material) || this;
			_this.type = 'GridHelper';
			return _this;
		}

		return GridHelper;
	}(LineSegments);

	var PolarGridHelper = /*#__PURE__*/function (_LineSegments) {
		_inheritsLoose(PolarGridHelper, _LineSegments);

		function PolarGridHelper(radius, radials, circles, divisions, color1, color2) {
			var _this;

			if (radius === void 0) {
				radius = 10;
			}

			if (radials === void 0) {
				radials = 16;
			}

			if (circles === void 0) {
				circles = 8;
			}

			if (divisions === void 0) {
				divisions = 64;
			}

			if (color1 === void 0) {
				color1 = 0x444444;
			}

			if (color2 === void 0) {
				color2 = 0x888888;
			}

			color1 = new Color(color1);
			color2 = new Color(color2);
			var vertices = [];
			var colors = []; // create the radials

			for (var i = 0; i <= radials; i++) {
				var v = i / radials * (Math.PI * 2);
				var x = Math.sin(v) * radius;
				var z = Math.cos(v) * radius;
				vertices.push(0, 0, 0);
				vertices.push(x, 0, z);
				var color = i & 1 ? color1 : color2;
				colors.push(color.r, color.g, color.b);
				colors.push(color.r, color.g, color.b);
			} // create the circles


			for (var _i = 0; _i <= circles; _i++) {
				var _color = _i & 1 ? color1 : color2;

				var r = radius - radius / circles * _i;

				for (var j = 0; j < divisions; j++) {
					// first vertex
					var _v = j / divisions * (Math.PI * 2);

					var _x = Math.sin(_v) * r;

					var _z = Math.cos(_v) * r;

					vertices.push(_x, 0, _z);
					colors.push(_color.r, _color.g, _color.b); // second vertex

					_v = (j + 1) / divisions * (Math.PI * 2);
					_x = Math.sin(_v) * r;
					_z = Math.cos(_v) * r;
					vertices.push(_x, 0, _z);
					colors.push(_color.r, _color.g, _color.b);
				}
			}

			var geometry = new BufferGeometry();
			geometry.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			geometry.setAttribute('color', new Float32BufferAttribute(colors, 3));
			var material = new LineBasicMaterial({
				vertexColors: true,
				toneMapped: false
			});
			_this = _LineSegments.call(this, geometry, material) || this;
			_this.type = 'PolarGridHelper';
			return _this;
		}

		return PolarGridHelper;
	}(LineSegments);

	var _v1$6 = /*@__PURE__*/new Vector3();

	var _v2$3 = /*@__PURE__*/new Vector3();

	var _v3$1 = /*@__PURE__*/new Vector3();

	var DirectionalLightHelper = /*#__PURE__*/function (_Object3D) {
		_inheritsLoose(DirectionalLightHelper, _Object3D);

		function DirectionalLightHelper(light, size, color) {
			var _this;

			_this = _Object3D.call(this) || this;
			_this.light = light;

			_this.light.updateMatrixWorld();

			_this.matrix = light.matrixWorld;
			_this.matrixAutoUpdate = false;
			_this.color = color;
			if (size === undefined) size = 1;
			var geometry = new BufferGeometry();
			geometry.setAttribute('position', new Float32BufferAttribute([-size, size, 0, size, size, 0, size, -size, 0, -size, -size, 0, -size, size, 0], 3));
			var material = new LineBasicMaterial({
				fog: false,
				toneMapped: false
			});
			_this.lightPlane = new Line(geometry, material);

			_this.add(_this.lightPlane);

			geometry = new BufferGeometry();
			geometry.setAttribute('position', new Float32BufferAttribute([0, 0, 0, 0, 0, 1], 3));
			_this.targetLine = new Line(geometry, material);

			_this.add(_this.targetLine);

			_this.update();

			return _this;
		}

		var _proto = DirectionalLightHelper.prototype;

		_proto.dispose = function dispose() {
			this.lightPlane.geometry.dispose();
			this.lightPlane.material.dispose();
			this.targetLine.geometry.dispose();
			this.targetLine.material.dispose();
		};

		_proto.update = function update() {
			_v1$6.setFromMatrixPosition(this.light.matrixWorld);

			_v2$3.setFromMatrixPosition(this.light.target.matrixWorld);

			_v3$1.subVectors(_v2$3, _v1$6);

			this.lightPlane.lookAt(_v2$3);

			if (this.color !== undefined) {
				this.lightPlane.material.color.set(this.color);
				this.targetLine.material.color.set(this.color);
			} else {
				this.lightPlane.material.color.copy(this.light.color);
				this.targetLine.material.color.copy(this.light.color);
			}

			this.targetLine.lookAt(_v2$3);
			this.targetLine.scale.z = _v3$1.length();
		};

		return DirectionalLightHelper;
	}(Object3D);

	var _vector$c = /*@__PURE__*/new Vector3();

	var _camera = /*@__PURE__*/new Camera();
	/**
	 *	- shows frustum, line of sight and up of the camera
	 *	- suitable for fast updates
	 * 	- based on frustum visualization in lightgl.js shadowmap example
	 *		http://evanw.github.com/lightgl.js/tests/shadowmap.html
	 */


	var CameraHelper = /*#__PURE__*/function (_LineSegments) {
		_inheritsLoose(CameraHelper, _LineSegments);

		function CameraHelper(camera) {
			var _this;

			var geometry = new BufferGeometry();
			var material = new LineBasicMaterial({
				color: 0xffffff,
				vertexColors: true,
				toneMapped: false
			});
			var vertices = [];
			var colors = [];
			var pointMap = {}; // colors

			var colorFrustum = new Color(0xffaa00);
			var colorCone = new Color(0xff0000);
			var colorUp = new Color(0x00aaff);
			var colorTarget = new Color(0xffffff);
			var colorCross = new Color(0x333333); // near

			addLine('n1', 'n2', colorFrustum);
			addLine('n2', 'n4', colorFrustum);
			addLine('n4', 'n3', colorFrustum);
			addLine('n3', 'n1', colorFrustum); // far

			addLine('f1', 'f2', colorFrustum);
			addLine('f2', 'f4', colorFrustum);
			addLine('f4', 'f3', colorFrustum);
			addLine('f3', 'f1', colorFrustum); // sides

			addLine('n1', 'f1', colorFrustum);
			addLine('n2', 'f2', colorFrustum);
			addLine('n3', 'f3', colorFrustum);
			addLine('n4', 'f4', colorFrustum); // cone

			addLine('p', 'n1', colorCone);
			addLine('p', 'n2', colorCone);
			addLine('p', 'n3', colorCone);
			addLine('p', 'n4', colorCone); // up

			addLine('u1', 'u2', colorUp);
			addLine('u2', 'u3', colorUp);
			addLine('u3', 'u1', colorUp); // target

			addLine('c', 't', colorTarget);
			addLine('p', 'c', colorCross); // cross

			addLine('cn1', 'cn2', colorCross);
			addLine('cn3', 'cn4', colorCross);
			addLine('cf1', 'cf2', colorCross);
			addLine('cf3', 'cf4', colorCross);

			function addLine(a, b, color) {
				addPoint(a, color);
				addPoint(b, color);
			}

			function addPoint(id, color) {
				vertices.push(0, 0, 0);
				colors.push(color.r, color.g, color.b);

				if (pointMap[id] === undefined) {
					pointMap[id] = [];
				}

				pointMap[id].push(vertices.length / 3 - 1);
			}

			geometry.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			geometry.setAttribute('color', new Float32BufferAttribute(colors, 3));
			_this = _LineSegments.call(this, geometry, material) || this;
			_this.type = 'CameraHelper';
			_this.camera = camera;
			if (_this.camera.updateProjectionMatrix) _this.camera.updateProjectionMatrix();
			_this.matrix = camera.matrixWorld;
			_this.matrixAutoUpdate = false;
			_this.pointMap = pointMap;

			_this.update();

			return _this;
		}

		var _proto = CameraHelper.prototype;

		_proto.update = function update() {
			var geometry = this.geometry;
			var pointMap = this.pointMap;
			var w = 1,
					h = 1; // we need just camera projection matrix inverse
			// world matrix must be identity

			_camera.projectionMatrixInverse.copy(this.camera.projectionMatrixInverse); // center / target


			setPoint('c', pointMap, geometry, _camera, 0, 0, -1);
			setPoint('t', pointMap, geometry, _camera, 0, 0, 1); // near

			setPoint('n1', pointMap, geometry, _camera, -w, -h, -1);
			setPoint('n2', pointMap, geometry, _camera, w, -h, -1);
			setPoint('n3', pointMap, geometry, _camera, -w, h, -1);
			setPoint('n4', pointMap, geometry, _camera, w, h, -1); // far

			setPoint('f1', pointMap, geometry, _camera, -w, -h, 1);
			setPoint('f2', pointMap, geometry, _camera, w, -h, 1);
			setPoint('f3', pointMap, geometry, _camera, -w, h, 1);
			setPoint('f4', pointMap, geometry, _camera, w, h, 1); // up

			setPoint('u1', pointMap, geometry, _camera, w * 0.7, h * 1.1, -1);
			setPoint('u2', pointMap, geometry, _camera, -w * 0.7, h * 1.1, -1);
			setPoint('u3', pointMap, geometry, _camera, 0, h * 2, -1); // cross

			setPoint('cf1', pointMap, geometry, _camera, -w, 0, 1);
			setPoint('cf2', pointMap, geometry, _camera, w, 0, 1);
			setPoint('cf3', pointMap, geometry, _camera, 0, -h, 1);
			setPoint('cf4', pointMap, geometry, _camera, 0, h, 1);
			setPoint('cn1', pointMap, geometry, _camera, -w, 0, -1);
			setPoint('cn2', pointMap, geometry, _camera, w, 0, -1);
			setPoint('cn3', pointMap, geometry, _camera, 0, -h, -1);
			setPoint('cn4', pointMap, geometry, _camera, 0, h, -1);
			geometry.getAttribute('position').needsUpdate = true;
		};

		return CameraHelper;
	}(LineSegments);

	function setPoint(point, pointMap, geometry, camera, x, y, z) {
		_vector$c.set(x, y, z).unproject(camera);

		var points = pointMap[point];

		if (points !== undefined) {
			var position = geometry.getAttribute('position');

			for (var i = 0, l = points.length; i < l; i++) {
				position.setXYZ(points[i], _vector$c.x, _vector$c.y, _vector$c.z);
			}
		}
	}

	var _box$3 = /*@__PURE__*/new Box3();

	var BoxHelper = /*#__PURE__*/function (_LineSegments) {
		_inheritsLoose(BoxHelper, _LineSegments);

		function BoxHelper(object, color) {
			var _this;

			if (color === void 0) {
				color = 0xffff00;
			}

			var indices = new Uint16Array([0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7]);
			var positions = new Float32Array(8 * 3);
			var geometry = new BufferGeometry();
			geometry.setIndex(new BufferAttribute(indices, 1));
			geometry.setAttribute('position', new BufferAttribute(positions, 3));
			_this = _LineSegments.call(this, geometry, new LineBasicMaterial({
				color: color,
				toneMapped: false
			})) || this;
			_this.object = object;
			_this.type = 'BoxHelper';
			_this.matrixAutoUpdate = false;

			_this.update();

			return _this;
		}

		var _proto = BoxHelper.prototype;

		_proto.update = function update(object) {
			if (object !== undefined) {
				console.warn('THREE.BoxHelper: .update() has no longer arguments.');
			}

			if (this.object !== undefined) {
				_box$3.setFromObject(this.object);
			}

			if (_box$3.isEmpty()) return;
			var min = _box$3.min;
			var max = _box$3.max;
			/*
				5____4
			1/___0/|
			| 6__|_7
			2/___3/
					0: max.x, max.y, max.z
			1: min.x, max.y, max.z
			2: min.x, min.y, max.z
			3: max.x, min.y, max.z
			4: max.x, max.y, min.z
			5: min.x, max.y, min.z
			6: min.x, min.y, min.z
			7: max.x, min.y, min.z
			*/

			var position = this.geometry.attributes.position;
			var array = position.array;
			array[0] = max.x;
			array[1] = max.y;
			array[2] = max.z;
			array[3] = min.x;
			array[4] = max.y;
			array[5] = max.z;
			array[6] = min.x;
			array[7] = min.y;
			array[8] = max.z;
			array[9] = max.x;
			array[10] = min.y;
			array[11] = max.z;
			array[12] = max.x;
			array[13] = max.y;
			array[14] = min.z;
			array[15] = min.x;
			array[16] = max.y;
			array[17] = min.z;
			array[18] = min.x;
			array[19] = min.y;
			array[20] = min.z;
			array[21] = max.x;
			array[22] = min.y;
			array[23] = min.z;
			position.needsUpdate = true;
			this.geometry.computeBoundingSphere();
		};

		_proto.setFromObject = function setFromObject(object) {
			this.object = object;
			this.update();
			return this;
		};

		_proto.copy = function copy(source) {
			LineSegments.prototype.copy.call(this, source);
			this.object = source.object;
			return this;
		};

		return BoxHelper;
	}(LineSegments);

	var Box3Helper = /*#__PURE__*/function (_LineSegments) {
		_inheritsLoose(Box3Helper, _LineSegments);

		function Box3Helper(box, color) {
			var _this;

			if (color === void 0) {
				color = 0xffff00;
			}

			var indices = new Uint16Array([0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7]);
			var positions = [1, 1, 1, -1, 1, 1, -1, -1, 1, 1, -1, 1, 1, 1, -1, -1, 1, -1, -1, -1, -1, 1, -1, -1];
			var geometry = new BufferGeometry();
			geometry.setIndex(new BufferAttribute(indices, 1));
			geometry.setAttribute('position', new Float32BufferAttribute(positions, 3));
			_this = _LineSegments.call(this, geometry, new LineBasicMaterial({
				color: color,
				toneMapped: false
			})) || this;
			_this.box = box;
			_this.type = 'Box3Helper';

			_this.geometry.computeBoundingSphere();

			return _this;
		}

		var _proto = Box3Helper.prototype;

		_proto.updateMatrixWorld = function updateMatrixWorld(force) {
			var box = this.box;
			if (box.isEmpty()) return;
			box.getCenter(this.position);
			box.getSize(this.scale);
			this.scale.multiplyScalar(0.5);

			_LineSegments.prototype.updateMatrixWorld.call(this, force);
		};

		return Box3Helper;
	}(LineSegments);

	var PlaneHelper = /*#__PURE__*/function (_Line) {
		_inheritsLoose(PlaneHelper, _Line);

		function PlaneHelper(plane, size, hex) {
			var _this;

			if (size === void 0) {
				size = 1;
			}

			if (hex === void 0) {
				hex = 0xffff00;
			}

			var color = hex;
			var positions = [1, -1, 1, -1, 1, 1, -1, -1, 1, 1, 1, 1, -1, 1, 1, -1, -1, 1, 1, -1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0];
			var geometry = new BufferGeometry();
			geometry.setAttribute('position', new Float32BufferAttribute(positions, 3));
			geometry.computeBoundingSphere();
			_this = _Line.call(this, geometry, new LineBasicMaterial({
				color: color,
				toneMapped: false
			})) || this;
			_this.type = 'PlaneHelper';
			_this.plane = plane;
			_this.size = size;
			var positions2 = [1, 1, 1, -1, 1, 1, -1, -1, 1, 1, 1, 1, -1, -1, 1, 1, -1, 1];
			var geometry2 = new BufferGeometry();
			geometry2.setAttribute('position', new Float32BufferAttribute(positions2, 3));
			geometry2.computeBoundingSphere();

			_this.add(new Mesh(geometry2, new MeshBasicMaterial({
				color: color,
				opacity: 0.2,
				transparent: true,
				depthWrite: false,
				toneMapped: false
			})));

			return _this;
		}

		var _proto = PlaneHelper.prototype;

		_proto.updateMatrixWorld = function updateMatrixWorld(force) {
			var scale = -this.plane.constant;
			if (Math.abs(scale) < 1e-8) scale = 1e-8; // sign does not matter

			this.scale.set(0.5 * this.size, 0.5 * this.size, scale);
			this.children[0].material.side = scale < 0 ? BackSide : FrontSide; // renderer flips side when determinant < 0; flipping not wanted here

			this.lookAt(this.plane.normal);

			_Line.prototype.updateMatrixWorld.call(this, force);
		};

		return PlaneHelper;
	}(Line);

	var _axis = /*@__PURE__*/new Vector3();

	var _lineGeometry, _coneGeometry;

	var ArrowHelper = /*#__PURE__*/function (_Object3D) {
		_inheritsLoose(ArrowHelper, _Object3D);

		function ArrowHelper(dir, origin, length, color, headLength, headWidth) {
			var _this;

			_this = _Object3D.call(this) || this; // dir is assumed to be normalized

			_this.type = 'ArrowHelper';
			if (dir === undefined) dir = new Vector3(0, 0, 1);
			if (origin === undefined) origin = new Vector3(0, 0, 0);
			if (length === undefined) length = 1;
			if (color === undefined) color = 0xffff00;
			if (headLength === undefined) headLength = 0.2 * length;
			if (headWidth === undefined) headWidth = 0.2 * headLength;

			if (_lineGeometry === undefined) {
				_lineGeometry = new BufferGeometry();

				_lineGeometry.setAttribute('position', new Float32BufferAttribute([0, 0, 0, 0, 1, 0], 3));

				_coneGeometry = new CylinderGeometry(0, 0.5, 1, 5, 1);

				_coneGeometry.translate(0, -0.5, 0);
			}

			_this.position.copy(origin);

			_this.line = new Line(_lineGeometry, new LineBasicMaterial({
				color: color,
				toneMapped: false
			}));
			_this.line.matrixAutoUpdate = false;

			_this.add(_this.line);

			_this.cone = new Mesh(_coneGeometry, new MeshBasicMaterial({
				color: color,
				toneMapped: false
			}));
			_this.cone.matrixAutoUpdate = false;

			_this.add(_this.cone);

			_this.setDirection(dir);

			_this.setLength(length, headLength, headWidth);

			return _this;
		}

		var _proto = ArrowHelper.prototype;

		_proto.setDirection = function setDirection(dir) {
			// dir is assumed to be normalized
			if (dir.y > 0.99999) {
				this.quaternion.set(0, 0, 0, 1);
			} else if (dir.y < -0.99999) {
				this.quaternion.set(1, 0, 0, 0);
			} else {
				_axis.set(dir.z, 0, -dir.x).normalize();

				var radians = Math.acos(dir.y);
				this.quaternion.setFromAxisAngle(_axis, radians);
			}
		};

		_proto.setLength = function setLength(length, headLength, headWidth) {
			if (headLength === undefined) headLength = 0.2 * length;
			if (headWidth === undefined) headWidth = 0.2 * headLength;
			this.line.scale.set(1, Math.max(0.0001, length - headLength), 1); // see #17458

			this.line.updateMatrix();
			this.cone.scale.set(headWidth, headLength, headWidth);
			this.cone.position.y = length;
			this.cone.updateMatrix();
		};

		_proto.setColor = function setColor(color) {
			this.line.material.color.set(color);
			this.cone.material.color.set(color);
		};

		_proto.copy = function copy(source) {
			_Object3D.prototype.copy.call(this, source, false);

			this.line.copy(source.line);
			this.cone.copy(source.cone);
			return this;
		};

		return ArrowHelper;
	}(Object3D);

	var AxesHelper = /*#__PURE__*/function (_LineSegments) {
		_inheritsLoose(AxesHelper, _LineSegments);

		function AxesHelper(size) {
			var _this;

			if (size === void 0) {
				size = 1;
			}

			var vertices = [0, 0, 0, size, 0, 0, 0, 0, 0, 0, size, 0, 0, 0, 0, 0, 0, size];
			var colors = [1, 0, 0, 1, 0.6, 0, 0, 1, 0, 0.6, 1, 0, 0, 0, 1, 0, 0.6, 1];
			var geometry = new BufferGeometry();
			geometry.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			geometry.setAttribute('color', new Float32BufferAttribute(colors, 3));
			var material = new LineBasicMaterial({
				vertexColors: true,
				toneMapped: false
			});
			_this = _LineSegments.call(this, geometry, material) || this;
			_this.type = 'AxesHelper';
			return _this;
		}

		return AxesHelper;
	}(LineSegments);

	var _floatView = new Float32Array(1);

	var _int32View = new Int32Array(_floatView.buffer);

	var DataUtils = {
		// Converts float32 to float16 (stored as uint16 value).
		toHalfFloat: function toHalfFloat(val) {
			// Source: http://gamedev.stackexchange.com/questions/17326/conversion-of-a-number-from-single-precision-floating-point-representation-to-a/17410#17410

			/* This method is faster than the OpenEXR implementation (very often
			* used, eg. in Ogre), with the additional benefit of rounding, inspired
			* by James Tursa?s half-precision code. */
			_floatView[0] = val;
			var x = _int32View[0];
			var bits = x >> 16 & 0x8000;
			/* Get the sign */

			var m = x >> 12 & 0x07ff;
			/* Keep one extra bit for rounding */

			var e = x >> 23 & 0xff;
			/* Using int is faster here */

			/* If zero, or denormal, or exponent underflows too much for a denormal
				* half, return signed zero. */

			if (e < 103) return bits;
			/* If NaN, return NaN. If Inf or exponent overflow, return Inf. */

			if (e > 142) {
				bits |= 0x7c00;
				/* If exponent was 0xff and one mantissa bit was set, it means NaN,
							* not Inf, so make sure we set one mantissa bit too. */

				bits |= (e == 255 ? 0 : 1) && x & 0x007fffff;
				return bits;
			}
			/* If exponent underflows but not too much, return a denormal */


			if (e < 113) {
				m |= 0x0800;
				/* Extra rounding may overflow and set mantissa to 0 and exponent
					* to 1, which is OK. */

				bits |= (m >> 114 - e) + (m >> 113 - e & 1);
				return bits;
			}

			bits |= e - 112 << 10 | m >> 1;
			/* Extra rounding. An overflow will set mantissa to 0 and increment
				* the exponent, which is OK. */

			bits += m & 1;
			return bits;
		}
	};

	var _ENCODINGS;
	var LOD_MIN = 4;
	var LOD_MAX = 8;
	var SIZE_MAX = Math.pow(2, LOD_MAX); // The standard deviations (radians) associated with the extra mips. These are
	// chosen to approximate a Trowbridge-Reitz distribution function times the
	// geometric shadowing function. These sigma values squared must match the
	// variance #defines in cube_uv_reflection_fragment.glsl.js.

	var EXTRA_LOD_SIGMA = [0.125, 0.215, 0.35, 0.446, 0.526, 0.582];
	var TOTAL_LODS = LOD_MAX - LOD_MIN + 1 + EXTRA_LOD_SIGMA.length; // The maximum length of the blur for loop. Smaller sigmas will use fewer
	// samples and exit early, but not recompile the shader.

	var MAX_SAMPLES = 20;
	var ENCODINGS = (_ENCODINGS = {}, _ENCODINGS[LinearEncoding] = 0, _ENCODINGS[sRGBEncoding] = 1, _ENCODINGS[RGBEEncoding] = 2, _ENCODINGS[RGBM7Encoding] = 3, _ENCODINGS[RGBM16Encoding] = 4, _ENCODINGS[RGBDEncoding] = 5, _ENCODINGS[GammaEncoding] = 6, _ENCODINGS);
	var backgroundMaterial = new MeshBasicMaterial({
		side: BackSide,
		depthWrite: false,
		depthTest: false
	});
	var backgroundBox = new Mesh(new BoxGeometry(), backgroundMaterial);

	var _flatCamera = /*@__PURE__*/new OrthographicCamera();

	var _createPlanes2 = /*@__PURE__*/_createPlanes(),
			_lodPlanes = _createPlanes2._lodPlanes,
			_sizeLods = _createPlanes2._sizeLods,
			_sigmas = _createPlanes2._sigmas;

	var _clearColor = /*@__PURE__*/new Color();

	var _oldTarget = null; // Golden Ratio

	var PHI = (1 + Math.sqrt(5)) / 2;
	var INV_PHI = 1 / PHI; // Vertices of a dodecahedron (except the opposites, which represent the
	// same axis), used as axis directions evenly spread on a sphere.

	var _axisDirections = [/*@__PURE__*/new Vector3(1, 1, 1), /*@__PURE__*/new Vector3(-1, 1, 1), /*@__PURE__*/new Vector3(1, 1, -1), /*@__PURE__*/new Vector3(-1, 1, -1), /*@__PURE__*/new Vector3(0, PHI, INV_PHI), /*@__PURE__*/new Vector3(0, PHI, -INV_PHI), /*@__PURE__*/new Vector3(INV_PHI, 0, PHI), /*@__PURE__*/new Vector3(-INV_PHI, 0, PHI), /*@__PURE__*/new Vector3(PHI, INV_PHI, 0), /*@__PURE__*/new Vector3(-PHI, INV_PHI, 0)];
	/**
	 * This class generates a Prefiltered, Mipmapped Radiance Environment Map
	 * (PMREM) from a cubeMap environment texture. This allows different levels of
	 * blur to be quickly accessed based on material roughness. It is packed into a
	 * special CubeUV format that allows us to perform custom interpolation so that
	 * we can support nonlinear formats such as RGBE. Unlike a traditional mipmap
	 * chain, it only goes down to the LOD_MIN level (above), and then creates extra
	 * even more filtered 'mips' at the same LOD_MIN resolution, associated with
	 * higher roughness levels. In this way we maintain resolution to smoothly
	 * interpolate diffuse lighting while limiting sampling computation.
	 */

	function convertLinearToRGBE(color) {
		var maxComponent = Math.max(color.r, color.g, color.b);
		var fExp = Math.min(Math.max(Math.ceil(Math.log2(maxComponent)), -128.0), 127.0);
		color.multiplyScalar(Math.pow(2.0, -fExp));
		var alpha = (fExp + 128.0) / 255.0;
		return alpha;
	}

	var PMREMGenerator = /*#__PURE__*/function () {
		function PMREMGenerator(renderer) {
			this._renderer = renderer;
			this._pingPongRenderTarget = null;
			this._blurMaterial = _getBlurShader(MAX_SAMPLES);
			this._equirectShader = null;
			this._cubemapShader = null;

			this._compileMaterial(this._blurMaterial);
		}
		/**
		 * Generates a PMREM from a supplied Scene, which can be faster than using an
		 * image if networking bandwidth is low. Optional sigma specifies a blur radius
		 * in radians to be applied to the scene before PMREM generation. Optional near
		 * and far planes ensure the scene is rendered in its entirety (the cubeCamera
		 * is placed at the origin).
		 */


		var _proto = PMREMGenerator.prototype;

		_proto.fromScene = function fromScene(scene, sigma, near, far) {
			if (sigma === void 0) {
				sigma = 0;
			}

			if (near === void 0) {
				near = 0.1;
			}

			if (far === void 0) {
				far = 100;
			}

			_oldTarget = this._renderer.getRenderTarget();

			var cubeUVRenderTarget = this._allocateTargets();

			this._sceneToCubeUV(scene, near, far, cubeUVRenderTarget);

			if (sigma > 0) {
				this._blur(cubeUVRenderTarget, 0, 0, sigma);
			}

			this._applyPMREM(cubeUVRenderTarget);

			this._cleanup(cubeUVRenderTarget);

			return cubeUVRenderTarget;
		}
		/**
		 * Generates a PMREM from an equirectangular texture, which can be either LDR
		 * (RGBFormat) or HDR (RGBEFormat). The ideal input image size is 1k (1024 x 512),
		 * as this matches best with the 256 x 256 cubemap output.
		 */
		;

		_proto.fromEquirectangular = function fromEquirectangular(equirectangular) {
			return this._fromTexture(equirectangular);
		}
		/**
		 * Generates a PMREM from an cubemap texture, which can be either LDR
		 * (RGBFormat) or HDR (RGBEFormat). The ideal input cube size is 256 x 256,
		 * as this matches best with the 256 x 256 cubemap output.
		 */
		;

		_proto.fromCubemap = function fromCubemap(cubemap) {
			return this._fromTexture(cubemap);
		}
		/**
		 * Pre-compiles the cubemap shader. You can get faster start-up by invoking this method during
		 * your texture's network fetch for increased concurrency.
		 */
		;

		_proto.compileCubemapShader = function compileCubemapShader() {
			if (this._cubemapShader === null) {
				this._cubemapShader = _getCubemapShader();

				this._compileMaterial(this._cubemapShader);
			}
		}
		/**
		 * Pre-compiles the equirectangular shader. You can get faster start-up by invoking this method during
		 * your texture's network fetch for increased concurrency.
		 */
		;

		_proto.compileEquirectangularShader = function compileEquirectangularShader() {
			if (this._equirectShader === null) {
				this._equirectShader = _getEquirectShader();

				this._compileMaterial(this._equirectShader);
			}
		}
		/**
		 * Disposes of the PMREMGenerator's internal memory. Note that PMREMGenerator is a static class,
		 * so you should not need more than one PMREMGenerator object. If you do, calling dispose() on
		 * one of them will cause any others to also become unusable.
		 */
		;

		_proto.dispose = function dispose() {
			this._blurMaterial.dispose();

			if (this._cubemapShader !== null) this._cubemapShader.dispose();
			if (this._equirectShader !== null) this._equirectShader.dispose();

			for (var i = 0; i < _lodPlanes.length; i++) {
				_lodPlanes[i].dispose();
			}
		} // private interface
		;

		_proto._cleanup = function _cleanup(outputTarget) {
			this._pingPongRenderTarget.dispose();

			this._renderer.setRenderTarget(_oldTarget);

			outputTarget.scissorTest = false;

			_setViewport(outputTarget, 0, 0, outputTarget.width, outputTarget.height);
		};

		_proto._fromTexture = function _fromTexture(texture) {
			_oldTarget = this._renderer.getRenderTarget();

			var cubeUVRenderTarget = this._allocateTargets(texture);

			this._textureToCubeUV(texture, cubeUVRenderTarget);

			this._applyPMREM(cubeUVRenderTarget);

			this._cleanup(cubeUVRenderTarget);

			return cubeUVRenderTarget;
		};

		_proto._allocateTargets = function _allocateTargets(texture) {
			// warning: null texture is valid
			var params = {
				magFilter: NearestFilter,
				minFilter: NearestFilter,
				generateMipmaps: false,
				type: UnsignedByteType,
				format: RGBEFormat,
				encoding: _isLDR(texture) ? texture.encoding : RGBEEncoding,
				depthBuffer: false
			};

			var cubeUVRenderTarget = _createRenderTarget(params);

			cubeUVRenderTarget.depthBuffer = texture ? false : true;
			this._pingPongRenderTarget = _createRenderTarget(params);
			return cubeUVRenderTarget;
		};

		_proto._compileMaterial = function _compileMaterial(material) {
			var tmpMesh = new Mesh(_lodPlanes[0], material);

			this._renderer.compile(tmpMesh, _flatCamera);
		};

		_proto._sceneToCubeUV = function _sceneToCubeUV(scene, near, far, cubeUVRenderTarget) {
			var fov = 90;
			var aspect = 1;
			var cubeCamera = new PerspectiveCamera(fov, aspect, near, far);
			var upSign = [1, -1, 1, 1, 1, 1];
			var forwardSign = [1, 1, 1, -1, -1, -1];
			var renderer = this._renderer;
			var originalAutoClear = renderer.autoClear;
			var outputEncoding = renderer.outputEncoding;
			var toneMapping = renderer.toneMapping;
			renderer.getClearColor(_clearColor);
			renderer.toneMapping = NoToneMapping;
			renderer.outputEncoding = LinearEncoding;
			renderer.autoClear = false;
			var useSolidColor = false;
			var background = scene.background;

			if (background) {
				if (background.isColor) {
					backgroundMaterial.color.copy(background).convertSRGBToLinear();
					scene.background = null;
					var alpha = convertLinearToRGBE(backgroundMaterial.color);
					backgroundMaterial.opacity = alpha;
					useSolidColor = true;
				}
			} else {
				backgroundMaterial.color.copy(_clearColor).convertSRGBToLinear();

				var _alpha = convertLinearToRGBE(backgroundMaterial.color);

				backgroundMaterial.opacity = _alpha;
				useSolidColor = true;
			}

			for (var i = 0; i < 6; i++) {
				var col = i % 3;

				if (col == 0) {
					cubeCamera.up.set(0, upSign[i], 0);
					cubeCamera.lookAt(forwardSign[i], 0, 0);
				} else if (col == 1) {
					cubeCamera.up.set(0, 0, upSign[i]);
					cubeCamera.lookAt(0, forwardSign[i], 0);
				} else {
					cubeCamera.up.set(0, upSign[i], 0);
					cubeCamera.lookAt(0, 0, forwardSign[i]);
				}

				_setViewport(cubeUVRenderTarget, col * SIZE_MAX, i > 2 ? SIZE_MAX : 0, SIZE_MAX, SIZE_MAX);

				renderer.setRenderTarget(cubeUVRenderTarget);

				if (useSolidColor) {
					renderer.render(backgroundBox, cubeCamera);
				}

				renderer.render(scene, cubeCamera);
			}

			renderer.toneMapping = toneMapping;
			renderer.outputEncoding = outputEncoding;
			renderer.autoClear = originalAutoClear;
		};

		_proto._textureToCubeUV = function _textureToCubeUV(texture, cubeUVRenderTarget) {
			var renderer = this._renderer;

			if (texture.isCubeTexture) {
				if (this._cubemapShader == null) {
					this._cubemapShader = _getCubemapShader();
				}
			} else {
				if (this._equirectShader == null) {
					this._equirectShader = _getEquirectShader();
				}
			}

			var material = texture.isCubeTexture ? this._cubemapShader : this._equirectShader;
			var mesh = new Mesh(_lodPlanes[0], material);
			var uniforms = material.uniforms;
			uniforms['envMap'].value = texture;

			if (!texture.isCubeTexture) {
				uniforms['texelSize'].value.set(1.0 / texture.image.width, 1.0 / texture.image.height);
			}

			uniforms['inputEncoding'].value = ENCODINGS[texture.encoding];
			uniforms['outputEncoding'].value = ENCODINGS[cubeUVRenderTarget.texture.encoding];

			_setViewport(cubeUVRenderTarget, 0, 0, 3 * SIZE_MAX, 2 * SIZE_MAX);

			renderer.setRenderTarget(cubeUVRenderTarget);
			renderer.render(mesh, _flatCamera);
		};

		_proto._applyPMREM = function _applyPMREM(cubeUVRenderTarget) {
			var renderer = this._renderer;
			var autoClear = renderer.autoClear;
			renderer.autoClear = false;

			for (var i = 1; i < TOTAL_LODS; i++) {
				var sigma = Math.sqrt(_sigmas[i] * _sigmas[i] - _sigmas[i - 1] * _sigmas[i - 1]);
				var poleAxis = _axisDirections[(i - 1) % _axisDirections.length];

				this._blur(cubeUVRenderTarget, i - 1, i, sigma, poleAxis);
			}

			renderer.autoClear = autoClear;
		}
		/**
		 * This is a two-pass Gaussian blur for a cubemap. Normally this is done
		 * vertically and horizontally, but this breaks down on a cube. Here we apply
		 * the blur latitudinally (around the poles), and then longitudinally (towards
		 * the poles) to approximate the orthogonally-separable blur. It is least
		 * accurate at the poles, but still does a decent job.
		 */
		;

		_proto._blur = function _blur(cubeUVRenderTarget, lodIn, lodOut, sigma, poleAxis) {
			var pingPongRenderTarget = this._pingPongRenderTarget;

			this._halfBlur(cubeUVRenderTarget, pingPongRenderTarget, lodIn, lodOut, sigma, 'latitudinal', poleAxis);

			this._halfBlur(pingPongRenderTarget, cubeUVRenderTarget, lodOut, lodOut, sigma, 'longitudinal', poleAxis);
		};

		_proto._halfBlur = function _halfBlur(targetIn, targetOut, lodIn, lodOut, sigmaRadians, direction, poleAxis) {
			var renderer = this._renderer;
			var blurMaterial = this._blurMaterial;

			if (direction !== 'latitudinal' && direction !== 'longitudinal') {
				console.error('blur direction must be either latitudinal or longitudinal!');
			} // Number of standard deviations at which to cut off the discrete approximation.


			var STANDARD_DEVIATIONS = 3;
			var blurMesh = new Mesh(_lodPlanes[lodOut], blurMaterial);
			var blurUniforms = blurMaterial.uniforms;
			var pixels = _sizeLods[lodIn] - 1;
			var radiansPerPixel = isFinite(sigmaRadians) ? Math.PI / (2 * pixels) : 2 * Math.PI / (2 * MAX_SAMPLES - 1);
			var sigmaPixels = sigmaRadians / radiansPerPixel;
			var samples = isFinite(sigmaRadians) ? 1 + Math.floor(STANDARD_DEVIATIONS * sigmaPixels) : MAX_SAMPLES;

			if (samples > MAX_SAMPLES) {
				console.warn("sigmaRadians, " + sigmaRadians + ", is too large and will clip, as it requested " + samples + " samples when the maximum is set to " + MAX_SAMPLES);
			}

			var weights = [];
			var sum = 0;

			for (var i = 0; i < MAX_SAMPLES; ++i) {
				var _x = i / sigmaPixels;

				var weight = Math.exp(-_x * _x / 2);
				weights.push(weight);

				if (i == 0) {
					sum += weight;
				} else if (i < samples) {
					sum += 2 * weight;
				}
			}

			for (var _i = 0; _i < weights.length; _i++) {
				weights[_i] = weights[_i] / sum;
			}

			blurUniforms['envMap'].value = targetIn.texture;
			blurUniforms['samples'].value = samples;
			blurUniforms['weights'].value = weights;
			blurUniforms['latitudinal'].value = direction === 'latitudinal';

			if (poleAxis) {
				blurUniforms['poleAxis'].value = poleAxis;
			}

			blurUniforms['dTheta'].value = radiansPerPixel;
			blurUniforms['mipInt'].value = LOD_MAX - lodIn;
			blurUniforms['inputEncoding'].value = ENCODINGS[targetIn.texture.encoding];
			blurUniforms['outputEncoding'].value = ENCODINGS[targetIn.texture.encoding];
			var outputSize = _sizeLods[lodOut];
			var x = 3 * Math.max(0, SIZE_MAX - 2 * outputSize);
			var y = (lodOut === 0 ? 0 : 2 * SIZE_MAX) + 2 * outputSize * (lodOut > LOD_MAX - LOD_MIN ? lodOut - LOD_MAX + LOD_MIN : 0);

			_setViewport(targetOut, x, y, 3 * outputSize, 2 * outputSize);

			renderer.setRenderTarget(targetOut);
			renderer.render(blurMesh, _flatCamera);
		};

		return PMREMGenerator;
	}();

	function _isLDR(texture) {
		if (texture === undefined || texture.type !== UnsignedByteType) return false;
		return texture.encoding === LinearEncoding || texture.encoding === sRGBEncoding || texture.encoding === GammaEncoding;
	}

	function _createPlanes() {
		var _lodPlanes = [];
		var _sizeLods = [];
		var _sigmas = [];
		var lod = LOD_MAX;

		for (var i = 0; i < TOTAL_LODS; i++) {
			var sizeLod = Math.pow(2, lod);

			_sizeLods.push(sizeLod);

			var sigma = 1.0 / sizeLod;

			if (i > LOD_MAX - LOD_MIN) {
				sigma = EXTRA_LOD_SIGMA[i - LOD_MAX + LOD_MIN - 1];
			} else if (i == 0) {
				sigma = 0;
			}

			_sigmas.push(sigma);

			var texelSize = 1.0 / (sizeLod - 1);
			var min = -texelSize / 2;
			var max = 1 + texelSize / 2;
			var uv1 = [min, min, max, min, max, max, min, min, max, max, min, max];
			var cubeFaces = 6;
			var vertices = 6;
			var positionSize = 3;
			var uvSize = 2;
			var faceIndexSize = 1;
			var position = new Float32Array(positionSize * vertices * cubeFaces);
			var uv = new Float32Array(uvSize * vertices * cubeFaces);
			var faceIndex = new Float32Array(faceIndexSize * vertices * cubeFaces);

			for (var face = 0; face < cubeFaces; face++) {
				var x = face % 3 * 2 / 3 - 1;
				var y = face > 2 ? 0 : -1;
				var coordinates = [x, y, 0, x + 2 / 3, y, 0, x + 2 / 3, y + 1, 0, x, y, 0, x + 2 / 3, y + 1, 0, x, y + 1, 0];
				position.set(coordinates, positionSize * vertices * face);
				uv.set(uv1, uvSize * vertices * face);
				var fill = [face, face, face, face, face, face];
				faceIndex.set(fill, faceIndexSize * vertices * face);
			}

			var planes = new BufferGeometry();
			planes.setAttribute('position', new BufferAttribute(position, positionSize));
			planes.setAttribute('uv', new BufferAttribute(uv, uvSize));
			planes.setAttribute('faceIndex', new BufferAttribute(faceIndex, faceIndexSize));

			_lodPlanes.push(planes);

			if (lod > LOD_MIN) {
				lod--;
			}
		}

		return {
			_lodPlanes: _lodPlanes,
			_sizeLods: _sizeLods,
			_sigmas: _sigmas
		};
	}

	function _createRenderTarget(params) {
		var cubeUVRenderTarget = new WebGLRenderTarget(3 * SIZE_MAX, 3 * SIZE_MAX, params);
		cubeUVRenderTarget.texture.mapping = CubeUVReflectionMapping;
		cubeUVRenderTarget.texture.name = 'PMREM.cubeUv';
		cubeUVRenderTarget.scissorTest = true;
		return cubeUVRenderTarget;
	}

	function _setViewport(target, x, y, width, height) {
		target.viewport.set(x, y, width, height);
		target.scissor.set(x, y, width, height);
	}

	function _getBlurShader(maxSamples) {
		var weights = new Float32Array(maxSamples);
		var poleAxis = new Vector3(0, 1, 0);
		var shaderMaterial = new RawShaderMaterial({
			name: 'SphericalGaussianBlur',
			defines: {
				'n': maxSamples
			},
			uniforms: {
				'envMap': {
					value: null
				},
				'samples': {
					value: 1
				},
				'weights': {
					value: weights
				},
				'latitudinal': {
					value: false
				},
				'dTheta': {
					value: 0
				},
				'mipInt': {
					value: 0
				},
				'poleAxis': {
					value: poleAxis
				},
				'inputEncoding': {
					value: ENCODINGS[LinearEncoding]
				},
				'outputEncoding': {
					value: ENCODINGS[LinearEncoding]
				}
			},
			vertexShader: _getCommonVertexShader(),
			fragmentShader:
			/* glsl */
			"\n\n\t\t\tprecision mediump float;\n\t\t\tprecision mediump int;\n\n\t\t\tvarying vec3 vOutputDirection;\n\n\t\t\tuniform sampler2D envMap;\n\t\t\tuniform int samples;\n\t\t\tuniform float weights[ n ];\n\t\t\tuniform bool latitudinal;\n\t\t\tuniform float dTheta;\n\t\t\tuniform float mipInt;\n\t\t\tuniform vec3 poleAxis;\n\n\t\t\t" + _getEncodings() + "\n\n\t\t\t#define ENVMAP_TYPE_CUBE_UV\n\t\t\t#include <cube_uv_reflection_fragment>\n\n\t\t\tvec3 getSample( float theta, vec3 axis ) {\n\n\t\t\t\tfloat cosTheta = cos( theta );\n\t\t\t\t// Rodrigues' axis-angle rotation\n\t\t\t\tvec3 sampleDirection = vOutputDirection * cosTheta\n\t\t\t\t\t+ cross( axis, vOutputDirection ) * sin( theta )\n\t\t\t\t\t+ axis * dot( axis, vOutputDirection ) * ( 1.0 - cosTheta );\n\n\t\t\t\treturn bilinearCubeUV( envMap, sampleDirection, mipInt );\n\n\t\t\t}\n\n\t\t\tvoid main() {\n\n\t\t\t\tvec3 axis = latitudinal ? poleAxis : cross( poleAxis, vOutputDirection );\n\n\t\t\t\tif ( all( equal( axis, vec3( 0.0 ) ) ) ) {\n\n\t\t\t\t\taxis = vec3( vOutputDirection.z, 0.0, - vOutputDirection.x );\n\n\t\t\t\t}\n\n\t\t\t\taxis = normalize( axis );\n\n\t\t\t\tgl_FragColor = vec4( 0.0, 0.0, 0.0, 1.0 );\n\t\t\t\tgl_FragColor.rgb += weights[ 0 ] * getSample( 0.0, axis );\n\n\t\t\t\tfor ( int i = 1; i < n; i++ ) {\n\n\t\t\t\t\tif ( i >= samples ) {\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tfloat theta = dTheta * float( i );\n\t\t\t\t\tgl_FragColor.rgb += weights[ i ] * getSample( -1.0 * theta, axis );\n\t\t\t\t\tgl_FragColor.rgb += weights[ i ] * getSample( theta, axis );\n\n\t\t\t\t}\n\n\t\t\t\tgl_FragColor = linearToOutputTexel( gl_FragColor );\n\n\t\t\t}\n\t\t",
			blending: NoBlending,
			depthTest: false,
			depthWrite: false
		});
		return shaderMaterial;
	}

	function _getEquirectShader() {
		var texelSize = new Vector2(1, 1);
		var shaderMaterial = new RawShaderMaterial({
			name: 'EquirectangularToCubeUV',
			uniforms: {
				'envMap': {
					value: null
				},
				'texelSize': {
					value: texelSize
				},
				'inputEncoding': {
					value: ENCODINGS[LinearEncoding]
				},
				'outputEncoding': {
					value: ENCODINGS[LinearEncoding]
				}
			},
			vertexShader: _getCommonVertexShader(),
			fragmentShader:
			/* glsl */
			"\n\n\t\t\tprecision mediump float;\n\t\t\tprecision mediump int;\n\n\t\t\tvarying vec3 vOutputDirection;\n\n\t\t\tuniform sampler2D envMap;\n\t\t\tuniform vec2 texelSize;\n\n\t\t\t" + _getEncodings() + "\n\n\t\t\t#include <common>\n\n\t\t\tvoid main() {\n\n\t\t\t\tgl_FragColor = vec4( 0.0, 0.0, 0.0, 1.0 );\n\n\t\t\t\tvec3 outputDirection = normalize( vOutputDirection );\n\t\t\t\tvec2 uv = equirectUv( outputDirection );\n\n\t\t\t\tvec2 f = fract( uv / texelSize - 0.5 );\n\t\t\t\tuv -= f * texelSize;\n\t\t\t\tvec3 tl = envMapTexelToLinear( texture2D ( envMap, uv ) ).rgb;\n\t\t\t\tuv.x += texelSize.x;\n\t\t\t\tvec3 tr = envMapTexelToLinear( texture2D ( envMap, uv ) ).rgb;\n\t\t\t\tuv.y += texelSize.y;\n\t\t\t\tvec3 br = envMapTexelToLinear( texture2D ( envMap, uv ) ).rgb;\n\t\t\t\tuv.x -= texelSize.x;\n\t\t\t\tvec3 bl = envMapTexelToLinear( texture2D ( envMap, uv ) ).rgb;\n\n\t\t\t\tvec3 tm = mix( tl, tr, f.x );\n\t\t\t\tvec3 bm = mix( bl, br, f.x );\n\t\t\t\tgl_FragColor.rgb = mix( tm, bm, f.y );\n\n\t\t\t\tgl_FragColor = linearToOutputTexel( gl_FragColor );\n\n\t\t\t}\n\t\t",
			blending: NoBlending,
			depthTest: false,
			depthWrite: false
		});
		return shaderMaterial;
	}

	function _getCubemapShader() {
		var shaderMaterial = new RawShaderMaterial({
			name: 'CubemapToCubeUV',
			uniforms: {
				'envMap': {
					value: null
				},
				'inputEncoding': {
					value: ENCODINGS[LinearEncoding]
				},
				'outputEncoding': {
					value: ENCODINGS[LinearEncoding]
				}
			},
			vertexShader: _getCommonVertexShader(),
			fragmentShader:
			/* glsl */
			"\n\n\t\t\tprecision mediump float;\n\t\t\tprecision mediump int;\n\n\t\t\tvarying vec3 vOutputDirection;\n\n\t\t\tuniform samplerCube envMap;\n\n\t\t\t" + _getEncodings() + "\n\n\t\t\tvoid main() {\n\n\t\t\t\tgl_FragColor = vec4( 0.0, 0.0, 0.0, 1.0 );\n\t\t\t\tgl_FragColor.rgb = envMapTexelToLinear( textureCube( envMap, vec3( - vOutputDirection.x, vOutputDirection.yz ) ) ).rgb;\n\t\t\t\tgl_FragColor = linearToOutputTexel( gl_FragColor );\n\n\t\t\t}\n\t\t",
			blending: NoBlending,
			depthTest: false,
			depthWrite: false
		});
		return shaderMaterial;
	}

	function _getCommonVertexShader() {
		return (
			/* glsl */
			"\n\n\t\tprecision mediump float;\n\t\tprecision mediump int;\n\n\t\tattribute vec3 position;\n\t\tattribute vec2 uv;\n\t\tattribute float faceIndex;\n\n\t\tvarying vec3 vOutputDirection;\n\n\t\t// RH coordinate system; PMREM face-indexing convention\n\t\tvec3 getDirection( vec2 uv, float face ) {\n\n\t\t\tuv = 2.0 * uv - 1.0;\n\n\t\t\tvec3 direction = vec3( uv, 1.0 );\n\n\t\t\tif ( face == 0.0 ) {\n\n\t\t\t\tdirection = direction.zyx; // ( 1, v, u ) pos x\n\n\t\t\t} else if ( face == 1.0 ) {\n\n\t\t\t\tdirection = direction.xzy;\n\t\t\t\tdirection.xz *= -1.0; // ( -u, 1, -v ) pos y\n\n\t\t\t} else if ( face == 2.0 ) {\n\n\t\t\t\tdirection.x *= -1.0; // ( -u, v, 1 ) pos z\n\n\t\t\t} else if ( face == 3.0 ) {\n\n\t\t\t\tdirection = direction.zyx;\n\t\t\t\tdirection.xz *= -1.0; // ( -1, v, -u ) neg x\n\n\t\t\t} else if ( face == 4.0 ) {\n\n\t\t\t\tdirection = direction.xzy;\n\t\t\t\tdirection.xy *= -1.0; // ( -u, -1, v ) neg y\n\n\t\t\t} else if ( face == 5.0 ) {\n\n\t\t\t\tdirection.z *= -1.0; // ( u, v, -1 ) neg z\n\n\t\t\t}\n\n\t\t\treturn direction;\n\n\t\t}\n\n\t\tvoid main() {\n\n\t\t\tvOutputDirection = getDirection( uv, faceIndex );\n\t\t\tgl_Position = vec4( position, 1.0 );\n\n\t\t}\n\t"
		);
	}

	function _getEncodings() {
		return (
			/* glsl */
			"\n\n\t\tuniform int inputEncoding;\n\t\tuniform int outputEncoding;\n\n\t\t#include <encodings_pars_fragment>\n\n\t\tvec4 inputTexelToLinear( vec4 value ) {\n\n\t\t\tif ( inputEncoding == 0 ) {\n\n\t\t\t\treturn value;\n\n\t\t\t} else if ( inputEncoding == 1 ) {\n\n\t\t\t\treturn sRGBToLinear( value );\n\n\t\t\t} else if ( inputEncoding == 2 ) {\n\n\t\t\t\treturn RGBEToLinear( value );\n\n\t\t\t} else if ( inputEncoding == 3 ) {\n\n\t\t\t\treturn RGBMToLinear( value, 7.0 );\n\n\t\t\t} else if ( inputEncoding == 4 ) {\n\n\t\t\t\treturn RGBMToLinear( value, 16.0 );\n\n\t\t\t} else if ( inputEncoding == 5 ) {\n\n\t\t\t\treturn RGBDToLinear( value, 256.0 );\n\n\t\t\t} else {\n\n\t\t\t\treturn GammaToLinear( value, 2.2 );\n\n\t\t\t}\n\n\t\t}\n\n\t\tvec4 linearToOutputTexel( vec4 value ) {\n\n\t\t\tif ( outputEncoding == 0 ) {\n\n\t\t\t\treturn value;\n\n\t\t\t} else if ( outputEncoding == 1 ) {\n\n\t\t\t\treturn LinearTosRGB( value );\n\n\t\t\t} else if ( outputEncoding == 2 ) {\n\n\t\t\t\treturn LinearToRGBE( value );\n\n\t\t\t} else if ( outputEncoding == 3 ) {\n\n\t\t\t\treturn LinearToRGBM( value, 7.0 );\n\n\t\t\t} else if ( outputEncoding == 4 ) {\n\n\t\t\t\treturn LinearToRGBM( value, 16.0 );\n\n\t\t\t} else if ( outputEncoding == 5 ) {\n\n\t\t\t\treturn LinearToRGBD( value, 256.0 );\n\n\t\t\t} else {\n\n\t\t\t\treturn LinearToGamma( value, 2.2 );\n\n\t\t\t}\n\n\t\t}\n\n\t\tvec4 envMapTexelToLinear( vec4 color ) {\n\n\t\t\treturn inputTexelToLinear( color );\n\n\t\t}\n\t"
		);
	}

	function Face4(a, b, c, d, normal, color, materialIndex) {
		console.warn('THREE.Face4 has been removed. A THREE.Face3 will be created instead.');
		return new Face3(a, b, c, normal, color, materialIndex);
	}
	var LineStrip = 0;
	var LinePieces = 1;
	var NoColors = 0;
	var FaceColors = 1;
	var VertexColors = 2;
	function MeshFaceMaterial(materials) {
		console.warn('THREE.MeshFaceMaterial has been removed. Use an Array instead.');
		return materials;
	}
	function MultiMaterial(materials) {
		if (materials === void 0) {
			materials = [];
		}

		console.warn('THREE.MultiMaterial has been removed. Use an Array instead.');
		materials.isMultiMaterial = true;
		materials.materials = materials;

		materials.clone = function () {
			return materials.slice();
		};

		return materials;
	}
	function PointCloud(geometry, material) {
		console.warn('THREE.PointCloud has been renamed to THREE.Points.');
		return new Points(geometry, material);
	}
	function Particle(material) {
		console.warn('THREE.Particle has been renamed to THREE.Sprite.');
		return new Sprite(material);
	}
	function ParticleSystem(geometry, material) {
		console.warn('THREE.ParticleSystem has been renamed to THREE.Points.');
		return new Points(geometry, material);
	}
	function PointCloudMaterial(parameters) {
		console.warn('THREE.PointCloudMaterial has been renamed to THREE.PointsMaterial.');
		return new PointsMaterial(parameters);
	}
	function ParticleBasicMaterial(parameters) {
		console.warn('THREE.ParticleBasicMaterial has been renamed to THREE.PointsMaterial.');
		return new PointsMaterial(parameters);
	}
	function ParticleSystemMaterial(parameters) {
		console.warn('THREE.ParticleSystemMaterial has been renamed to THREE.PointsMaterial.');
		return new PointsMaterial(parameters);
	}
	function Vertex(x, y, z) {
		console.warn('THREE.Vertex has been removed. Use THREE.Vector3 instead.');
		return new Vector3(x, y, z);
	} //

	function DynamicBufferAttribute(array, itemSize) {
		console.warn('THREE.DynamicBufferAttribute has been removed. Use new THREE.BufferAttribute().setUsage( THREE.DynamicDrawUsage ) instead.');
		return new BufferAttribute(array, itemSize).setUsage(DynamicDrawUsage);
	}
	function Int8Attribute(array, itemSize) {
		console.warn('THREE.Int8Attribute has been removed. Use new THREE.Int8BufferAttribute() instead.');
		return new Int8BufferAttribute(array, itemSize);
	}
	function Uint8Attribute(array, itemSize) {
		console.warn('THREE.Uint8Attribute has been removed. Use new THREE.Uint8BufferAttribute() instead.');
		return new Uint8BufferAttribute(array, itemSize);
	}
	function Uint8ClampedAttribute(array, itemSize) {
		console.warn('THREE.Uint8ClampedAttribute has been removed. Use new THREE.Uint8ClampedBufferAttribute() instead.');
		return new Uint8ClampedBufferAttribute(array, itemSize);
	}
	function Int16Attribute(array, itemSize) {
		console.warn('THREE.Int16Attribute has been removed. Use new THREE.Int16BufferAttribute() instead.');
		return new Int16BufferAttribute(array, itemSize);
	}
	function Uint16Attribute(array, itemSize) {
		console.warn('THREE.Uint16Attribute has been removed. Use new THREE.Uint16BufferAttribute() instead.');
		return new Uint16BufferAttribute(array, itemSize);
	}
	function Int32Attribute(array, itemSize) {
		console.warn('THREE.Int32Attribute has been removed. Use new THREE.Int32BufferAttribute() instead.');
		return new Int32BufferAttribute(array, itemSize);
	}
	function Uint32Attribute(array, itemSize) {
		console.warn('THREE.Uint32Attribute has been removed. Use new THREE.Uint32BufferAttribute() instead.');
		return new Uint32BufferAttribute(array, itemSize);
	}
	function Float32Attribute(array, itemSize) {
		console.warn('THREE.Float32Attribute has been removed. Use new THREE.Float32BufferAttribute() instead.');
		return new Float32BufferAttribute(array, itemSize);
	}
	function Float64Attribute(array, itemSize) {
		console.warn('THREE.Float64Attribute has been removed. Use new THREE.Float64BufferAttribute() instead.');
		return new Float64BufferAttribute(array, itemSize);
	} //

	Curve.create = function (construct, getPoint) {
		console.log('THREE.Curve.create() has been deprecated');
		construct.prototype = Object.create(Curve.prototype);
		construct.prototype.constructor = construct;
		construct.prototype.getPoint = getPoint;
		return construct;
	}; //


	Object.assign(Path.prototype, {
		fromPoints: function fromPoints(points) {
			console.warn('THREE.Path: .fromPoints() has been renamed to .setFromPoints().');
			return this.setFromPoints(points);
		}
	}); //

	function ClosedSplineCurve3(points) {
		console.warn('THREE.ClosedSplineCurve3 has been deprecated. Use THREE.CatmullRomCurve3 instead.');
		CatmullRomCurve3.call(this, points);
		this.type = 'catmullrom';
		this.closed = true;
	}
	ClosedSplineCurve3.prototype = Object.create(CatmullRomCurve3.prototype); //

	function SplineCurve3(points) {
		console.warn('THREE.SplineCurve3 has been deprecated. Use THREE.CatmullRomCurve3 instead.');
		CatmullRomCurve3.call(this, points);
		this.type = 'catmullrom';
	}
	SplineCurve3.prototype = Object.create(CatmullRomCurve3.prototype); //

	function Spline(points) {
		console.warn('THREE.Spline has been removed. Use THREE.CatmullRomCurve3 instead.');
		CatmullRomCurve3.call(this, points);
		this.type = 'catmullrom';
	}
	Spline.prototype = Object.create(CatmullRomCurve3.prototype);
	Object.assign(Spline.prototype, {
		initFromArray: function initFromArray()
		/* a */
		{
			console.error('THREE.Spline: .initFromArray() has been removed.');
		},
		getControlPointsArray: function getControlPointsArray()
		/* optionalTarget */
		{
			console.error('THREE.Spline: .getControlPointsArray() has been removed.');
		},
		reparametrizeByArcLength: function reparametrizeByArcLength()
		/* samplingCoef */
		{
			console.error('THREE.Spline: .reparametrizeByArcLength() has been removed.');
		}
	}); //

	function AxisHelper(size) {
		console.warn('THREE.AxisHelper has been renamed to THREE.AxesHelper.');
		return new AxesHelper(size);
	}
	function BoundingBoxHelper(object, color) {
		console.warn('THREE.BoundingBoxHelper has been deprecated. Creating a THREE.BoxHelper instead.');
		return new BoxHelper(object, color);
	}
	function EdgesHelper(object, hex) {
		console.warn('THREE.EdgesHelper has been removed. Use THREE.EdgesGeometry instead.');
		return new LineSegments(new EdgesGeometry(object.geometry), new LineBasicMaterial({
			color: hex !== undefined ? hex : 0xffffff
		}));
	}

	GridHelper.prototype.setColors = function () {
		console.error('THREE.GridHelper: setColors() has been deprecated, pass them in the constructor instead.');
	};

	SkeletonHelper.prototype.update = function () {
		console.error('THREE.SkeletonHelper: update() no longer needs to be called.');
	};

	function WireframeHelper(object, hex) {
		console.warn('THREE.WireframeHelper has been removed. Use THREE.WireframeGeometry instead.');
		return new LineSegments(new WireframeGeometry(object.geometry), new LineBasicMaterial({
			color: hex !== undefined ? hex : 0xffffff
		}));
	} //

	Object.assign(Loader.prototype, {
		extractUrlBase: function extractUrlBase(url) {
			console.warn('THREE.Loader: .extractUrlBase() has been deprecated. Use THREE.LoaderUtils.extractUrlBase() instead.');
			return LoaderUtils.extractUrlBase(url);
		}
	});
	Loader.Handlers = {
		add: function add()
		/* regex, loader */
		{
			console.error('THREE.Loader: Handlers.add() has been removed. Use LoadingManager.addHandler() instead.');
		},
		get: function get()
		/* file */
		{
			console.error('THREE.Loader: Handlers.get() has been removed. Use LoadingManager.getHandler() instead.');
		}
	};
	function XHRLoader(manager) {
		console.warn('THREE.XHRLoader has been renamed to THREE.FileLoader.');
		return new FileLoader(manager);
	}
	function BinaryTextureLoader(manager) {
		console.warn('THREE.BinaryTextureLoader has been renamed to THREE.DataTextureLoader.');
		return new DataTextureLoader(manager);
	} //

	Object.assign(Box2.prototype, {
		center: function center(optionalTarget) {
			console.warn('THREE.Box2: .center() has been renamed to .getCenter().');
			return this.getCenter(optionalTarget);
		},
		empty: function empty() {
			console.warn('THREE.Box2: .empty() has been renamed to .isEmpty().');
			return this.isEmpty();
		},
		isIntersectionBox: function isIntersectionBox(box) {
			console.warn('THREE.Box2: .isIntersectionBox() has been renamed to .intersectsBox().');
			return this.intersectsBox(box);
		},
		size: function size(optionalTarget) {
			console.warn('THREE.Box2: .size() has been renamed to .getSize().');
			return this.getSize(optionalTarget);
		}
	});
	Object.assign(Box3.prototype, {
		center: function center(optionalTarget) {
			console.warn('THREE.Box3: .center() has been renamed to .getCenter().');
			return this.getCenter(optionalTarget);
		},
		empty: function empty() {
			console.warn('THREE.Box3: .empty() has been renamed to .isEmpty().');
			return this.isEmpty();
		},
		isIntersectionBox: function isIntersectionBox(box) {
			console.warn('THREE.Box3: .isIntersectionBox() has been renamed to .intersectsBox().');
			return this.intersectsBox(box);
		},
		isIntersectionSphere: function isIntersectionSphere(sphere) {
			console.warn('THREE.Box3: .isIntersectionSphere() has been renamed to .intersectsSphere().');
			return this.intersectsSphere(sphere);
		},
		size: function size(optionalTarget) {
			console.warn('THREE.Box3: .size() has been renamed to .getSize().');
			return this.getSize(optionalTarget);
		}
	});
	Object.assign(Sphere.prototype, {
		empty: function empty() {
			console.warn('THREE.Sphere: .empty() has been renamed to .isEmpty().');
			return this.isEmpty();
		}
	});

	Frustum.prototype.setFromMatrix = function (m) {
		console.warn('THREE.Frustum: .setFromMatrix() has been renamed to .setFromProjectionMatrix().');
		return this.setFromProjectionMatrix(m);
	};

	Line3.prototype.center = function (optionalTarget) {
		console.warn('THREE.Line3: .center() has been renamed to .getCenter().');
		return this.getCenter(optionalTarget);
	};

	Object.assign(MathUtils, {
		random16: function random16() {
			console.warn('THREE.Math: .random16() has been deprecated. Use Math.random() instead.');
			return Math.random();
		},
		nearestPowerOfTwo: function nearestPowerOfTwo(value) {
			console.warn('THREE.Math: .nearestPowerOfTwo() has been renamed to .floorPowerOfTwo().');
			return MathUtils.floorPowerOfTwo(value);
		},
		nextPowerOfTwo: function nextPowerOfTwo(value) {
			console.warn('THREE.Math: .nextPowerOfTwo() has been renamed to .ceilPowerOfTwo().');
			return MathUtils.ceilPowerOfTwo(value);
		}
	});
	Object.assign(Matrix3.prototype, {
		flattenToArrayOffset: function flattenToArrayOffset(array, offset) {
			console.warn('THREE.Matrix3: .flattenToArrayOffset() has been deprecated. Use .toArray() instead.');
			return this.toArray(array, offset);
		},
		multiplyVector3: function multiplyVector3(vector) {
			console.warn('THREE.Matrix3: .multiplyVector3() has been removed. Use vector.applyMatrix3( matrix ) instead.');
			return vector.applyMatrix3(this);
		},
		multiplyVector3Array: function multiplyVector3Array()
		/* a */
		{
			console.error('THREE.Matrix3: .multiplyVector3Array() has been removed.');
		},
		applyToBufferAttribute: function applyToBufferAttribute(attribute) {
			console.warn('THREE.Matrix3: .applyToBufferAttribute() has been removed. Use attribute.applyMatrix3( matrix ) instead.');
			return attribute.applyMatrix3(this);
		},
		applyToVector3Array: function applyToVector3Array()
		/* array, offset, length */
		{
			console.error('THREE.Matrix3: .applyToVector3Array() has been removed.');
		},
		getInverse: function getInverse(matrix) {
			console.warn('THREE.Matrix3: .getInverse() has been removed. Use matrixInv.copy( matrix ).invert(); instead.');
			return this.copy(matrix).invert();
		}
	});
	Object.assign(Matrix4.prototype, {
		extractPosition: function extractPosition(m) {
			console.warn('THREE.Matrix4: .extractPosition() has been renamed to .copyPosition().');
			return this.copyPosition(m);
		},
		flattenToArrayOffset: function flattenToArrayOffset(array, offset) {
			console.warn('THREE.Matrix4: .flattenToArrayOffset() has been deprecated. Use .toArray() instead.');
			return this.toArray(array, offset);
		},
		getPosition: function getPosition() {
			console.warn('THREE.Matrix4: .getPosition() has been removed. Use Vector3.setFromMatrixPosition( matrix ) instead.');
			return new Vector3().setFromMatrixColumn(this, 3);
		},
		setRotationFromQuaternion: function setRotationFromQuaternion(q) {
			console.warn('THREE.Matrix4: .setRotationFromQuaternion() has been renamed to .makeRotationFromQuaternion().');
			return this.makeRotationFromQuaternion(q);
		},
		multiplyToArray: function multiplyToArray() {
			console.warn('THREE.Matrix4: .multiplyToArray() has been removed.');
		},
		multiplyVector3: function multiplyVector3(vector) {
			console.warn('THREE.Matrix4: .multiplyVector3() has been removed. Use vector.applyMatrix4( matrix ) instead.');
			return vector.applyMatrix4(this);
		},
		multiplyVector4: function multiplyVector4(vector) {
			console.warn('THREE.Matrix4: .multiplyVector4() has been removed. Use vector.applyMatrix4( matrix ) instead.');
			return vector.applyMatrix4(this);
		},
		multiplyVector3Array: function multiplyVector3Array()
		/* a */
		{
			console.error('THREE.Matrix4: .multiplyVector3Array() has been removed.');
		},
		rotateAxis: function rotateAxis(v) {
			console.warn('THREE.Matrix4: .rotateAxis() has been removed. Use Vector3.transformDirection( matrix ) instead.');
			v.transformDirection(this);
		},
		crossVector: function crossVector(vector) {
			console.warn('THREE.Matrix4: .crossVector() has been removed. Use vector.applyMatrix4( matrix ) instead.');
			return vector.applyMatrix4(this);
		},
		translate: function translate() {
			console.error('THREE.Matrix4: .translate() has been removed.');
		},
		rotateX: function rotateX() {
			console.error('THREE.Matrix4: .rotateX() has been removed.');
		},
		rotateY: function rotateY() {
			console.error('THREE.Matrix4: .rotateY() has been removed.');
		},
		rotateZ: function rotateZ() {
			console.error('THREE.Matrix4: .rotateZ() has been removed.');
		},
		rotateByAxis: function rotateByAxis() {
			console.error('THREE.Matrix4: .rotateByAxis() has been removed.');
		},
		applyToBufferAttribute: function applyToBufferAttribute(attribute) {
			console.warn('THREE.Matrix4: .applyToBufferAttribute() has been removed. Use attribute.applyMatrix4( matrix ) instead.');
			return attribute.applyMatrix4(this);
		},
		applyToVector3Array: function applyToVector3Array()
		/* array, offset, length */
		{
			console.error('THREE.Matrix4: .applyToVector3Array() has been removed.');
		},
		makeFrustum: function makeFrustum(left, right, bottom, top, near, far) {
			console.warn('THREE.Matrix4: .makeFrustum() has been removed. Use .makePerspective( left, right, top, bottom, near, far ) instead.');
			return this.makePerspective(left, right, top, bottom, near, far);
		},
		getInverse: function getInverse(matrix) {
			console.warn('THREE.Matrix4: .getInverse() has been removed. Use matrixInv.copy( matrix ).invert(); instead.');
			return this.copy(matrix).invert();
		}
	});

	Plane.prototype.isIntersectionLine = function (line) {
		console.warn('THREE.Plane: .isIntersectionLine() has been renamed to .intersectsLine().');
		return this.intersectsLine(line);
	};

	Object.assign(Quaternion.prototype, {
		multiplyVector3: function multiplyVector3(vector) {
			console.warn('THREE.Quaternion: .multiplyVector3() has been removed. Use is now vector.applyQuaternion( quaternion ) instead.');
			return vector.applyQuaternion(this);
		},
		inverse: function inverse() {
			console.warn('THREE.Quaternion: .inverse() has been renamed to invert().');
			return this.invert();
		}
	});
	Object.assign(Ray.prototype, {
		isIntersectionBox: function isIntersectionBox(box) {
			console.warn('THREE.Ray: .isIntersectionBox() has been renamed to .intersectsBox().');
			return this.intersectsBox(box);
		},
		isIntersectionPlane: function isIntersectionPlane(plane) {
			console.warn('THREE.Ray: .isIntersectionPlane() has been renamed to .intersectsPlane().');
			return this.intersectsPlane(plane);
		},
		isIntersectionSphere: function isIntersectionSphere(sphere) {
			console.warn('THREE.Ray: .isIntersectionSphere() has been renamed to .intersectsSphere().');
			return this.intersectsSphere(sphere);
		}
	});
	Object.assign(Triangle.prototype, {
		area: function area() {
			console.warn('THREE.Triangle: .area() has been renamed to .getArea().');
			return this.getArea();
		},
		barycoordFromPoint: function barycoordFromPoint(point, target) {
			console.warn('THREE.Triangle: .barycoordFromPoint() has been renamed to .getBarycoord().');
			return this.getBarycoord(point, target);
		},
		midpoint: function midpoint(target) {
			console.warn('THREE.Triangle: .midpoint() has been renamed to .getMidpoint().');
			return this.getMidpoint(target);
		},
		normal: function normal(target) {
			console.warn('THREE.Triangle: .normal() has been renamed to .getNormal().');
			return this.getNormal(target);
		},
		plane: function plane(target) {
			console.warn('THREE.Triangle: .plane() has been renamed to .getPlane().');
			return this.getPlane(target);
		}
	});
	Object.assign(Triangle, {
		barycoordFromPoint: function barycoordFromPoint(point, a, b, c, target) {
			console.warn('THREE.Triangle: .barycoordFromPoint() has been renamed to .getBarycoord().');
			return Triangle.getBarycoord(point, a, b, c, target);
		},
		normal: function normal(a, b, c, target) {
			console.warn('THREE.Triangle: .normal() has been renamed to .getNormal().');
			return Triangle.getNormal(a, b, c, target);
		}
	});
	Object.assign(Shape.prototype, {
		extractAllPoints: function extractAllPoints(divisions) {
			console.warn('THREE.Shape: .extractAllPoints() has been removed. Use .extractPoints() instead.');
			return this.extractPoints(divisions);
		},
		extrude: function extrude(options) {
			console.warn('THREE.Shape: .extrude() has been removed. Use ExtrudeGeometry() instead.');
			return new ExtrudeGeometry(this, options);
		},
		makeGeometry: function makeGeometry(options) {
			console.warn('THREE.Shape: .makeGeometry() has been removed. Use ShapeGeometry() instead.');
			return new ShapeGeometry(this, options);
		}
	});
	Object.assign(Vector2.prototype, {
		fromAttribute: function fromAttribute(attribute, index, offset) {
			console.warn('THREE.Vector2: .fromAttribute() has been renamed to .fromBufferAttribute().');
			return this.fromBufferAttribute(attribute, index, offset);
		},
		distanceToManhattan: function distanceToManhattan(v) {
			console.warn('THREE.Vector2: .distanceToManhattan() has been renamed to .manhattanDistanceTo().');
			return this.manhattanDistanceTo(v);
		},
		lengthManhattan: function lengthManhattan() {
			console.warn('THREE.Vector2: .lengthManhattan() has been renamed to .manhattanLength().');
			return this.manhattanLength();
		}
	});
	Object.assign(Vector3.prototype, {
		setEulerFromRotationMatrix: function setEulerFromRotationMatrix() {
			console.error('THREE.Vector3: .setEulerFromRotationMatrix() has been removed. Use Euler.setFromRotationMatrix() instead.');
		},
		setEulerFromQuaternion: function setEulerFromQuaternion() {
			console.error('THREE.Vector3: .setEulerFromQuaternion() has been removed. Use Euler.setFromQuaternion() instead.');
		},
		getPositionFromMatrix: function getPositionFromMatrix(m) {
			console.warn('THREE.Vector3: .getPositionFromMatrix() has been renamed to .setFromMatrixPosition().');
			return this.setFromMatrixPosition(m);
		},
		getScaleFromMatrix: function getScaleFromMatrix(m) {
			console.warn('THREE.Vector3: .getScaleFromMatrix() has been renamed to .setFromMatrixScale().');
			return this.setFromMatrixScale(m);
		},
		getColumnFromMatrix: function getColumnFromMatrix(index, matrix) {
			console.warn('THREE.Vector3: .getColumnFromMatrix() has been renamed to .setFromMatrixColumn().');
			return this.setFromMatrixColumn(matrix, index);
		},
		applyProjection: function applyProjection(m) {
			console.warn('THREE.Vector3: .applyProjection() has been removed. Use .applyMatrix4( m ) instead.');
			return this.applyMatrix4(m);
		},
		fromAttribute: function fromAttribute(attribute, index, offset) {
			console.warn('THREE.Vector3: .fromAttribute() has been renamed to .fromBufferAttribute().');
			return this.fromBufferAttribute(attribute, index, offset);
		},
		distanceToManhattan: function distanceToManhattan(v) {
			console.warn('THREE.Vector3: .distanceToManhattan() has been renamed to .manhattanDistanceTo().');
			return this.manhattanDistanceTo(v);
		},
		lengthManhattan: function lengthManhattan() {
			console.warn('THREE.Vector3: .lengthManhattan() has been renamed to .manhattanLength().');
			return this.manhattanLength();
		}
	});
	Object.assign(Vector4.prototype, {
		fromAttribute: function fromAttribute(attribute, index, offset) {
			console.warn('THREE.Vector4: .fromAttribute() has been renamed to .fromBufferAttribute().');
			return this.fromBufferAttribute(attribute, index, offset);
		},
		lengthManhattan: function lengthManhattan() {
			console.warn('THREE.Vector4: .lengthManhattan() has been renamed to .manhattanLength().');
			return this.manhattanLength();
		}
	}); //

	Object.assign(Object3D.prototype, {
		getChildByName: function getChildByName(name) {
			console.warn('THREE.Object3D: .getChildByName() has been renamed to .getObjectByName().');
			return this.getObjectByName(name);
		},
		renderDepth: function renderDepth() {
			console.warn('THREE.Object3D: .renderDepth has been removed. Use .renderOrder, instead.');
		},
		translate: function translate(distance, axis) {
			console.warn('THREE.Object3D: .translate() has been removed. Use .translateOnAxis( axis, distance ) instead.');
			return this.translateOnAxis(axis, distance);
		},
		getWorldRotation: function getWorldRotation() {
			console.error('THREE.Object3D: .getWorldRotation() has been removed. Use THREE.Object3D.getWorldQuaternion( target ) instead.');
		},
		applyMatrix: function applyMatrix(matrix) {
			console.warn('THREE.Object3D: .applyMatrix() has been renamed to .applyMatrix4().');
			return this.applyMatrix4(matrix);
		}
	});
	Object.defineProperties(Object3D.prototype, {
		eulerOrder: {
			get: function get() {
				console.warn('THREE.Object3D: .eulerOrder is now .rotation.order.');
				return this.rotation.order;
			},
			set: function set(value) {
				console.warn('THREE.Object3D: .eulerOrder is now .rotation.order.');
				this.rotation.order = value;
			}
		},
		useQuaternion: {
			get: function get() {
				console.warn('THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.');
			},
			set: function set() {
				console.warn('THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.');
			}
		}
	});
	Object.assign(Mesh.prototype, {
		setDrawMode: function setDrawMode() {
			console.error('THREE.Mesh: .setDrawMode() has been removed. The renderer now always assumes THREE.TrianglesDrawMode. Transform your geometry via BufferGeometryUtils.toTrianglesDrawMode() if necessary.');
		}
	});
	Object.defineProperties(Mesh.prototype, {
		drawMode: {
			get: function get() {
				console.error('THREE.Mesh: .drawMode has been removed. The renderer now always assumes THREE.TrianglesDrawMode.');
				return TrianglesDrawMode;
			},
			set: function set() {
				console.error('THREE.Mesh: .drawMode has been removed. The renderer now always assumes THREE.TrianglesDrawMode. Transform your geometry via BufferGeometryUtils.toTrianglesDrawMode() if necessary.');
			}
		}
	});
	Object.defineProperties(LOD.prototype, {
		objects: {
			get: function get() {
				console.warn('THREE.LOD: .objects has been renamed to .levels.');
				return this.levels;
			}
		}
	});
	Object.defineProperty(Skeleton.prototype, 'useVertexTexture', {
		get: function get() {
			console.warn('THREE.Skeleton: useVertexTexture has been removed.');
		},
		set: function set() {
			console.warn('THREE.Skeleton: useVertexTexture has been removed.');
		}
	});

	SkinnedMesh.prototype.initBones = function () {
		console.error('THREE.SkinnedMesh: initBones() has been removed.');
	};

	Object.defineProperty(Curve.prototype, '__arcLengthDivisions', {
		get: function get() {
			console.warn('THREE.Curve: .__arcLengthDivisions is now .arcLengthDivisions.');
			return this.arcLengthDivisions;
		},
		set: function set(value) {
			console.warn('THREE.Curve: .__arcLengthDivisions is now .arcLengthDivisions.');
			this.arcLengthDivisions = value;
		}
	}); //

	PerspectiveCamera.prototype.setLens = function (focalLength, filmGauge) {
		console.warn('THREE.PerspectiveCamera.setLens is deprecated. ' + 'Use .setFocalLength and .filmGauge for a photographic setup.');
		if (filmGauge !== undefined) this.filmGauge = filmGauge;
		this.setFocalLength(focalLength);
	}; //


	Object.defineProperties(Light.prototype, {
		onlyShadow: {
			set: function set() {
				console.warn('THREE.Light: .onlyShadow has been removed.');
			}
		},
		shadowCameraFov: {
			set: function set(value) {
				console.warn('THREE.Light: .shadowCameraFov is now .shadow.camera.fov.');
				this.shadow.camera.fov = value;
			}
		},
		shadowCameraLeft: {
			set: function set(value) {
				console.warn('THREE.Light: .shadowCameraLeft is now .shadow.camera.left.');
				this.shadow.camera.left = value;
			}
		},
		shadowCameraRight: {
			set: function set(value) {
				console.warn('THREE.Light: .shadowCameraRight is now .shadow.camera.right.');
				this.shadow.camera.right = value;
			}
		},
		shadowCameraTop: {
			set: function set(value) {
				console.warn('THREE.Light: .shadowCameraTop is now .shadow.camera.top.');
				this.shadow.camera.top = value;
			}
		},
		shadowCameraBottom: {
			set: function set(value) {
				console.warn('THREE.Light: .shadowCameraBottom is now .shadow.camera.bottom.');
				this.shadow.camera.bottom = value;
			}
		},
		shadowCameraNear: {
			set: function set(value) {
				console.warn('THREE.Light: .shadowCameraNear is now .shadow.camera.near.');
				this.shadow.camera.near = value;
			}
		},
		shadowCameraFar: {
			set: function set(value) {
				console.warn('THREE.Light: .shadowCameraFar is now .shadow.camera.far.');
				this.shadow.camera.far = value;
			}
		},
		shadowCameraVisible: {
			set: function set() {
				console.warn('THREE.Light: .shadowCameraVisible has been removed. Use new THREE.CameraHelper( light.shadow.camera ) instead.');
			}
		},
		shadowBias: {
			set: function set(value) {
				console.warn('THREE.Light: .shadowBias is now .shadow.bias.');
				this.shadow.bias = value;
			}
		},
		shadowDarkness: {
			set: function set() {
				console.warn('THREE.Light: .shadowDarkness has been removed.');
			}
		},
		shadowMapWidth: {
			set: function set(value) {
				console.warn('THREE.Light: .shadowMapWidth is now .shadow.mapSize.width.');
				this.shadow.mapSize.width = value;
			}
		},
		shadowMapHeight: {
			set: function set(value) {
				console.warn('THREE.Light: .shadowMapHeight is now .shadow.mapSize.height.');
				this.shadow.mapSize.height = value;
			}
		}
	}); //

	Object.defineProperties(BufferAttribute.prototype, {
		length: {
			get: function get() {
				console.warn('THREE.BufferAttribute: .length has been deprecated. Use .count instead.');
				return this.array.length;
			}
		},
		dynamic: {
			get: function get() {
				console.warn('THREE.BufferAttribute: .dynamic has been deprecated. Use .usage instead.');
				return this.usage === DynamicDrawUsage;
			},
			set: function set()
			/* value */
			{
				console.warn('THREE.BufferAttribute: .dynamic has been deprecated. Use .usage instead.');
				this.setUsage(DynamicDrawUsage);
			}
		}
	});
	Object.assign(BufferAttribute.prototype, {
		setDynamic: function setDynamic(value) {
			console.warn('THREE.BufferAttribute: .setDynamic() has been deprecated. Use .setUsage() instead.');
			this.setUsage(value === true ? DynamicDrawUsage : StaticDrawUsage);
			return this;
		},
		copyIndicesArray: function copyIndicesArray()
		/* indices */
		{
			console.error('THREE.BufferAttribute: .copyIndicesArray() has been removed.');
		},
		setArray: function setArray()
		/* array */
		{
			console.error('THREE.BufferAttribute: .setArray has been removed. Use BufferGeometry .setAttribute to replace/resize attribute buffers');
		}
	});
	Object.assign(BufferGeometry.prototype, {
		addIndex: function addIndex(index) {
			console.warn('THREE.BufferGeometry: .addIndex() has been renamed to .setIndex().');
			this.setIndex(index);
		},
		addAttribute: function addAttribute(name, attribute) {
			console.warn('THREE.BufferGeometry: .addAttribute() has been renamed to .setAttribute().');

			if (!(attribute && attribute.isBufferAttribute) && !(attribute && attribute.isInterleavedBufferAttribute)) {
				console.warn('THREE.BufferGeometry: .addAttribute() now expects ( name, attribute ).');
				return this.setAttribute(name, new BufferAttribute(arguments[1], arguments[2]));
			}

			if (name === 'index') {
				console.warn('THREE.BufferGeometry.addAttribute: Use .setIndex() for index attribute.');
				this.setIndex(attribute);
				return this;
			}

			return this.setAttribute(name, attribute);
		},
		addDrawCall: function addDrawCall(start, count, indexOffset) {
			if (indexOffset !== undefined) {
				console.warn('THREE.BufferGeometry: .addDrawCall() no longer supports indexOffset.');
			}

			console.warn('THREE.BufferGeometry: .addDrawCall() is now .addGroup().');
			this.addGroup(start, count);
		},
		clearDrawCalls: function clearDrawCalls() {
			console.warn('THREE.BufferGeometry: .clearDrawCalls() is now .clearGroups().');
			this.clearGroups();
		},
		computeOffsets: function computeOffsets() {
			console.warn('THREE.BufferGeometry: .computeOffsets() has been removed.');
		},
		removeAttribute: function removeAttribute(name) {
			console.warn('THREE.BufferGeometry: .removeAttribute() has been renamed to .deleteAttribute().');
			return this.deleteAttribute(name);
		},
		applyMatrix: function applyMatrix(matrix) {
			console.warn('THREE.BufferGeometry: .applyMatrix() has been renamed to .applyMatrix4().');
			return this.applyMatrix4(matrix);
		}
	});
	Object.defineProperties(BufferGeometry.prototype, {
		drawcalls: {
			get: function get() {
				console.error('THREE.BufferGeometry: .drawcalls has been renamed to .groups.');
				return this.groups;
			}
		},
		offsets: {
			get: function get() {
				console.warn('THREE.BufferGeometry: .offsets has been renamed to .groups.');
				return this.groups;
			}
		}
	});
	Object.defineProperties(InstancedBufferGeometry.prototype, {
		maxInstancedCount: {
			get: function get() {
				console.warn('THREE.InstancedBufferGeometry: .maxInstancedCount has been renamed to .instanceCount.');
				return this.instanceCount;
			},
			set: function set(value) {
				console.warn('THREE.InstancedBufferGeometry: .maxInstancedCount has been renamed to .instanceCount.');
				this.instanceCount = value;
			}
		}
	});
	Object.defineProperties(Raycaster.prototype, {
		linePrecision: {
			get: function get() {
				console.warn('THREE.Raycaster: .linePrecision has been deprecated. Use .params.Line.threshold instead.');
				return this.params.Line.threshold;
			},
			set: function set(value) {
				console.warn('THREE.Raycaster: .linePrecision has been deprecated. Use .params.Line.threshold instead.');
				this.params.Line.threshold = value;
			}
		}
	});
	Object.defineProperties(InterleavedBuffer.prototype, {
		dynamic: {
			get: function get() {
				console.warn('THREE.InterleavedBuffer: .length has been deprecated. Use .usage instead.');
				return this.usage === DynamicDrawUsage;
			},
			set: function set(value) {
				console.warn('THREE.InterleavedBuffer: .length has been deprecated. Use .usage instead.');
				this.setUsage(value);
			}
		}
	});
	Object.assign(InterleavedBuffer.prototype, {
		setDynamic: function setDynamic(value) {
			console.warn('THREE.InterleavedBuffer: .setDynamic() has been deprecated. Use .setUsage() instead.');
			this.setUsage(value === true ? DynamicDrawUsage : StaticDrawUsage);
			return this;
		},
		setArray: function setArray()
		/* array */
		{
			console.error('THREE.InterleavedBuffer: .setArray has been removed. Use BufferGeometry .setAttribute to replace/resize attribute buffers');
		}
	}); //

	Object.assign(ExtrudeGeometry.prototype, {
		getArrays: function getArrays() {
			console.error('THREE.ExtrudeGeometry: .getArrays() has been removed.');
		},
		addShapeList: function addShapeList() {
			console.error('THREE.ExtrudeGeometry: .addShapeList() has been removed.');
		},
		addShape: function addShape() {
			console.error('THREE.ExtrudeGeometry: .addShape() has been removed.');
		}
	}); //

	Object.assign(Scene.prototype, {
		dispose: function dispose() {
			console.error('THREE.Scene: .dispose() has been removed.');
		}
	}); //

	Object.defineProperties(Uniform.prototype, {
		dynamic: {
			set: function set() {
				console.warn('THREE.Uniform: .dynamic has been removed. Use object.onBeforeRender() instead.');
			}
		},
		onUpdate: {
			value: function value() {
				console.warn('THREE.Uniform: .onUpdate() has been removed. Use object.onBeforeRender() instead.');
				return this;
			}
		}
	}); //

	Object.defineProperties(Material.prototype, {
		wrapAround: {
			get: function get() {
				console.warn('THREE.Material: .wrapAround has been removed.');
			},
			set: function set() {
				console.warn('THREE.Material: .wrapAround has been removed.');
			}
		},
		overdraw: {
			get: function get() {
				console.warn('THREE.Material: .overdraw has been removed.');
			},
			set: function set() {
				console.warn('THREE.Material: .overdraw has been removed.');
			}
		},
		wrapRGB: {
			get: function get() {
				console.warn('THREE.Material: .wrapRGB has been removed.');
				return new Color();
			}
		},
		shading: {
			get: function get() {
				console.error('THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.');
			},
			set: function set(value) {
				console.warn('THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.');
				this.flatShading = value === FlatShading;
			}
		},
		stencilMask: {
			get: function get() {
				console.warn('THREE.' + this.type + ': .stencilMask has been removed. Use .stencilFuncMask instead.');
				return this.stencilFuncMask;
			},
			set: function set(value) {
				console.warn('THREE.' + this.type + ': .stencilMask has been removed. Use .stencilFuncMask instead.');
				this.stencilFuncMask = value;
			}
		}
	});
	Object.defineProperties(MeshPhongMaterial.prototype, {
		metal: {
			get: function get() {
				console.warn('THREE.MeshPhongMaterial: .metal has been removed. Use THREE.MeshStandardMaterial instead.');
				return false;
			},
			set: function set() {
				console.warn('THREE.MeshPhongMaterial: .metal has been removed. Use THREE.MeshStandardMaterial instead');
			}
		}
	});
	Object.defineProperties(MeshPhysicalMaterial.prototype, {
		transparency: {
			get: function get() {
				console.warn('THREE.MeshPhysicalMaterial: .transparency has been renamed to .transmission.');
				return this.transmission;
			},
			set: function set(value) {
				console.warn('THREE.MeshPhysicalMaterial: .transparency has been renamed to .transmission.');
				this.transmission = value;
			}
		}
	});
	Object.defineProperties(ShaderMaterial.prototype, {
		derivatives: {
			get: function get() {
				console.warn('THREE.ShaderMaterial: .derivatives has been moved to .extensions.derivatives.');
				return this.extensions.derivatives;
			},
			set: function set(value) {
				console.warn('THREE. ShaderMaterial: .derivatives has been moved to .extensions.derivatives.');
				this.extensions.derivatives = value;
			}
		}
	}); //

	Object.assign(WebGLRenderer.prototype, {
		clearTarget: function clearTarget(renderTarget, color, depth, stencil) {
			console.warn('THREE.WebGLRenderer: .clearTarget() has been deprecated. Use .setRenderTarget() and .clear() instead.');
			this.setRenderTarget(renderTarget);
			this.clear(color, depth, stencil);
		},
		animate: function animate(callback) {
			console.warn('THREE.WebGLRenderer: .animate() is now .setAnimationLoop().');
			this.setAnimationLoop(callback);
		},
		getCurrentRenderTarget: function getCurrentRenderTarget() {
			console.warn('THREE.WebGLRenderer: .getCurrentRenderTarget() is now .getRenderTarget().');
			return this.getRenderTarget();
		},
		getMaxAnisotropy: function getMaxAnisotropy() {
			console.warn('THREE.WebGLRenderer: .getMaxAnisotropy() is now .capabilities.getMaxAnisotropy().');
			return this.capabilities.getMaxAnisotropy();
		},
		getPrecision: function getPrecision() {
			console.warn('THREE.WebGLRenderer: .getPrecision() is now .capabilities.precision.');
			return this.capabilities.precision;
		},
		resetGLState: function resetGLState() {
			console.warn('THREE.WebGLRenderer: .resetGLState() is now .state.reset().');
			return this.state.reset();
		},
		supportsFloatTextures: function supportsFloatTextures() {
			console.warn('THREE.WebGLRenderer: .supportsFloatTextures() is now .extensions.get( \'OES_texture_float\' ).');
			return this.extensions.get('OES_texture_float');
		},
		supportsHalfFloatTextures: function supportsHalfFloatTextures() {
			console.warn('THREE.WebGLRenderer: .supportsHalfFloatTextures() is now .extensions.get( \'OES_texture_half_float\' ).');
			return this.extensions.get('OES_texture_half_float');
		},
		supportsStandardDerivatives: function supportsStandardDerivatives() {
			console.warn('THREE.WebGLRenderer: .supportsStandardDerivatives() is now .extensions.get( \'OES_standard_derivatives\' ).');
			return this.extensions.get('OES_standard_derivatives');
		},
		supportsCompressedTextureS3TC: function supportsCompressedTextureS3TC() {
			console.warn('THREE.WebGLRenderer: .supportsCompressedTextureS3TC() is now .extensions.get( \'WEBGL_compressed_texture_s3tc\' ).');
			return this.extensions.get('WEBGL_compressed_texture_s3tc');
		},
		supportsCompressedTexturePVRTC: function supportsCompressedTexturePVRTC() {
			console.warn('THREE.WebGLRenderer: .supportsCompressedTexturePVRTC() is now .extensions.get( \'WEBGL_compressed_texture_pvrtc\' ).');
			return this.extensions.get('WEBGL_compressed_texture_pvrtc');
		},
		supportsBlendMinMax: function supportsBlendMinMax() {
			console.warn('THREE.WebGLRenderer: .supportsBlendMinMax() is now .extensions.get( \'EXT_blend_minmax\' ).');
			return this.extensions.get('EXT_blend_minmax');
		},
		supportsVertexTextures: function supportsVertexTextures() {
			console.warn('THREE.WebGLRenderer: .supportsVertexTextures() is now .capabilities.vertexTextures.');
			return this.capabilities.vertexTextures;
		},
		supportsInstancedArrays: function supportsInstancedArrays() {
			console.warn('THREE.WebGLRenderer: .supportsInstancedArrays() is now .extensions.get( \'ANGLE_instanced_arrays\' ).');
			return this.extensions.get('ANGLE_instanced_arrays');
		},
		enableScissorTest: function enableScissorTest(boolean) {
			console.warn('THREE.WebGLRenderer: .enableScissorTest() is now .setScissorTest().');
			this.setScissorTest(boolean);
		},
		initMaterial: function initMaterial() {
			console.warn('THREE.WebGLRenderer: .initMaterial() has been removed.');
		},
		addPrePlugin: function addPrePlugin() {
			console.warn('THREE.WebGLRenderer: .addPrePlugin() has been removed.');
		},
		addPostPlugin: function addPostPlugin() {
			console.warn('THREE.WebGLRenderer: .addPostPlugin() has been removed.');
		},
		updateShadowMap: function updateShadowMap() {
			console.warn('THREE.WebGLRenderer: .updateShadowMap() has been removed.');
		},
		setFaceCulling: function setFaceCulling() {
			console.warn('THREE.WebGLRenderer: .setFaceCulling() has been removed.');
		},
		allocTextureUnit: function allocTextureUnit() {
			console.warn('THREE.WebGLRenderer: .allocTextureUnit() has been removed.');
		},
		setTexture: function setTexture() {
			console.warn('THREE.WebGLRenderer: .setTexture() has been removed.');
		},
		setTextureCube: function setTextureCube() {
			console.warn('THREE.WebGLRenderer: .setTextureCube() has been removed.');
		},
		getActiveMipMapLevel: function getActiveMipMapLevel() {
			console.warn('THREE.WebGLRenderer: .getActiveMipMapLevel() is now .getActiveMipmapLevel().');
			return this.getActiveMipmapLevel();
		}
	});
	Object.defineProperties(WebGLRenderer.prototype, {
		shadowMapEnabled: {
			get: function get() {
				return this.shadowMap.enabled;
			},
			set: function set(value) {
				console.warn('THREE.WebGLRenderer: .shadowMapEnabled is now .shadowMap.enabled.');
				this.shadowMap.enabled = value;
			}
		},
		shadowMapType: {
			get: function get() {
				return this.shadowMap.type;
			},
			set: function set(value) {
				console.warn('THREE.WebGLRenderer: .shadowMapType is now .shadowMap.type.');
				this.shadowMap.type = value;
			}
		},
		shadowMapCullFace: {
			get: function get() {
				console.warn('THREE.WebGLRenderer: .shadowMapCullFace has been removed. Set Material.shadowSide instead.');
				return undefined;
			},
			set: function set()
			/* value */
			{
				console.warn('THREE.WebGLRenderer: .shadowMapCullFace has been removed. Set Material.shadowSide instead.');
			}
		},
		context: {
			get: function get() {
				console.warn('THREE.WebGLRenderer: .context has been removed. Use .getContext() instead.');
				return this.getContext();
			}
		},
		vr: {
			get: function get() {
				console.warn('THREE.WebGLRenderer: .vr has been renamed to .xr');
				return this.xr;
			}
		},
		gammaInput: {
			get: function get() {
				console.warn('THREE.WebGLRenderer: .gammaInput has been removed. Set the encoding for textures via Texture.encoding instead.');
				return false;
			},
			set: function set() {
				console.warn('THREE.WebGLRenderer: .gammaInput has been removed. Set the encoding for textures via Texture.encoding instead.');
			}
		},
		gammaOutput: {
			get: function get() {
				console.warn('THREE.WebGLRenderer: .gammaOutput has been removed. Set WebGLRenderer.outputEncoding instead.');
				return false;
			},
			set: function set(value) {
				console.warn('THREE.WebGLRenderer: .gammaOutput has been removed. Set WebGLRenderer.outputEncoding instead.');
				this.outputEncoding = value === true ? sRGBEncoding : LinearEncoding;
			}
		},
		toneMappingWhitePoint: {
			get: function get() {
				console.warn('THREE.WebGLRenderer: .toneMappingWhitePoint has been removed.');
				return 1.0;
			},
			set: function set() {
				console.warn('THREE.WebGLRenderer: .toneMappingWhitePoint has been removed.');
			}
		}
	});
	Object.defineProperties(WebGLShadowMap.prototype, {
		cullFace: {
			get: function get() {
				console.warn('THREE.WebGLRenderer: .shadowMap.cullFace has been removed. Set Material.shadowSide instead.');
				return undefined;
			},
			set: function set()
			/* cullFace */
			{
				console.warn('THREE.WebGLRenderer: .shadowMap.cullFace has been removed. Set Material.shadowSide instead.');
			}
		},
		renderReverseSided: {
			get: function get() {
				console.warn('THREE.WebGLRenderer: .shadowMap.renderReverseSided has been removed. Set Material.shadowSide instead.');
				return undefined;
			},
			set: function set() {
				console.warn('THREE.WebGLRenderer: .shadowMap.renderReverseSided has been removed. Set Material.shadowSide instead.');
			}
		},
		renderSingleSided: {
			get: function get() {
				console.warn('THREE.WebGLRenderer: .shadowMap.renderSingleSided has been removed. Set Material.shadowSide instead.');
				return undefined;
			},
			set: function set() {
				console.warn('THREE.WebGLRenderer: .shadowMap.renderSingleSided has been removed. Set Material.shadowSide instead.');
			}
		}
	});
	function WebGLRenderTargetCube(width, height, options) {
		console.warn('THREE.WebGLRenderTargetCube( width, height, options ) is now WebGLCubeRenderTarget( size, options ).');
		return new WebGLCubeRenderTarget(width, options);
	} //

	Object.defineProperties(WebGLRenderTarget.prototype, {
		wrapS: {
			get: function get() {
				console.warn('THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.');
				return this.texture.wrapS;
			},
			set: function set(value) {
				console.warn('THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.');
				this.texture.wrapS = value;
			}
		},
		wrapT: {
			get: function get() {
				console.warn('THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.');
				return this.texture.wrapT;
			},
			set: function set(value) {
				console.warn('THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.');
				this.texture.wrapT = value;
			}
		},
		magFilter: {
			get: function get() {
				console.warn('THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.');
				return this.texture.magFilter;
			},
			set: function set(value) {
				console.warn('THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.');
				this.texture.magFilter = value;
			}
		},
		minFilter: {
			get: function get() {
				console.warn('THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.');
				return this.texture.minFilter;
			},
			set: function set(value) {
				console.warn('THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.');
				this.texture.minFilter = value;
			}
		},
		anisotropy: {
			get: function get() {
				console.warn('THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.');
				return this.texture.anisotropy;
			},
			set: function set(value) {
				console.warn('THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.');
				this.texture.anisotropy = value;
			}
		},
		offset: {
			get: function get() {
				console.warn('THREE.WebGLRenderTarget: .offset is now .texture.offset.');
				return this.texture.offset;
			},
			set: function set(value) {
				console.warn('THREE.WebGLRenderTarget: .offset is now .texture.offset.');
				this.texture.offset = value;
			}
		},
		repeat: {
			get: function get() {
				console.warn('THREE.WebGLRenderTarget: .repeat is now .texture.repeat.');
				return this.texture.repeat;
			},
			set: function set(value) {
				console.warn('THREE.WebGLRenderTarget: .repeat is now .texture.repeat.');
				this.texture.repeat = value;
			}
		},
		format: {
			get: function get() {
				console.warn('THREE.WebGLRenderTarget: .format is now .texture.format.');
				return this.texture.format;
			},
			set: function set(value) {
				console.warn('THREE.WebGLRenderTarget: .format is now .texture.format.');
				this.texture.format = value;
			}
		},
		type: {
			get: function get() {
				console.warn('THREE.WebGLRenderTarget: .type is now .texture.type.');
				return this.texture.type;
			},
			set: function set(value) {
				console.warn('THREE.WebGLRenderTarget: .type is now .texture.type.');
				this.texture.type = value;
			}
		},
		generateMipmaps: {
			get: function get() {
				console.warn('THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.');
				return this.texture.generateMipmaps;
			},
			set: function set(value) {
				console.warn('THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.');
				this.texture.generateMipmaps = value;
			}
		}
	}); //

	Object.defineProperties(Audio.prototype, {
		load: {
			value: function value(file) {
				console.warn('THREE.Audio: .load has been deprecated. Use THREE.AudioLoader instead.');
				var scope = this;
				var audioLoader = new AudioLoader();
				audioLoader.load(file, function (buffer) {
					scope.setBuffer(buffer);
				});
				return this;
			}
		},
		startTime: {
			set: function set() {
				console.warn('THREE.Audio: .startTime is now .play( delay ).');
			}
		}
	});

	AudioAnalyser.prototype.getData = function () {
		console.warn('THREE.AudioAnalyser: .getData() is now .getFrequencyData().');
		return this.getFrequencyData();
	}; //


	CubeCamera.prototype.updateCubeMap = function (renderer, scene) {
		console.warn('THREE.CubeCamera: .updateCubeMap() is now .update().');
		return this.update(renderer, scene);
	};

	CubeCamera.prototype.clear = function (renderer, color, depth, stencil) {
		console.warn('THREE.CubeCamera: .clear() is now .renderTarget.clear().');
		return this.renderTarget.clear(renderer, color, depth, stencil);
	}; //


	var GeometryUtils = {
		merge: function merge(geometry1, geometry2, materialIndexOffset) {
			console.warn('THREE.GeometryUtils: .merge() has been moved to Geometry. Use geometry.merge( geometry2, matrix, materialIndexOffset ) instead.');
			var matrix;

			if (geometry2.isMesh) {
				geometry2.matrixAutoUpdate && geometry2.updateMatrix();
				matrix = geometry2.matrix;
				geometry2 = geometry2.geometry;
			}

			geometry1.merge(geometry2, matrix, materialIndexOffset);
		},
		center: function center(geometry) {
			console.warn('THREE.GeometryUtils: .center() has been moved to Geometry. Use geometry.center() instead.');
			return geometry.center();
		}
	};
	ImageUtils.crossOrigin = undefined;

	ImageUtils.loadTexture = function (url, mapping, onLoad, onError) {
		console.warn('THREE.ImageUtils.loadTexture has been deprecated. Use THREE.TextureLoader() instead.');
		var loader = new TextureLoader();
		loader.setCrossOrigin(this.crossOrigin);
		var texture = loader.load(url, onLoad, undefined, onError);
		if (mapping) texture.mapping = mapping;
		return texture;
	};

	ImageUtils.loadTextureCube = function (urls, mapping, onLoad, onError) {
		console.warn('THREE.ImageUtils.loadTextureCube has been deprecated. Use THREE.CubeTextureLoader() instead.');
		var loader = new CubeTextureLoader();
		loader.setCrossOrigin(this.crossOrigin);
		var texture = loader.load(urls, onLoad, undefined, onError);
		if (mapping) texture.mapping = mapping;
		return texture;
	};

	ImageUtils.loadCompressedTexture = function () {
		console.error('THREE.ImageUtils.loadCompressedTexture has been removed. Use THREE.DDSLoader instead.');
	};

	ImageUtils.loadCompressedTextureCube = function () {
		console.error('THREE.ImageUtils.loadCompressedTextureCube has been removed. Use THREE.DDSLoader instead.');
	}; //


	function CanvasRenderer() {
		console.error('THREE.CanvasRenderer has been removed');
	} //

	function JSONLoader() {
		console.error('THREE.JSONLoader has been removed.');
	} //

	var SceneUtils = {
		createMultiMaterialObject: function createMultiMaterialObject()
		/* geometry, materials */
		{
			console.error('THREE.SceneUtils has been moved to /examples/jsm/utils/SceneUtils.js');
		},
		detach: function detach()
		/* child, parent, scene */
		{
			console.error('THREE.SceneUtils has been moved to /examples/jsm/utils/SceneUtils.js');
		},
		attach: function attach()
		/* child, scene, parent */
		{
			console.error('THREE.SceneUtils has been moved to /examples/jsm/utils/SceneUtils.js');
		}
	}; //

	function LensFlare() {
		console.error('THREE.LensFlare has been moved to /examples/jsm/objects/Lensflare.js');
	}

	if (typeof __THREE_DEVTOOLS__ !== 'undefined') {
		/* eslint-disable no-undef */
		__THREE_DEVTOOLS__.dispatchEvent(new CustomEvent('register', {
			detail: {
				revision: REVISION
			}
		}));
		/* eslint-enable no-undef */

	}

	if (typeof window !== 'undefined') {
		if (window.__THREE__) {
			console.warn('WARNING: Multiple instances of Three.js being imported.');
		} else {
			window.__THREE__ = REVISION;
		}
	}

	exports.ACESFilmicToneMapping = ACESFilmicToneMapping;
	exports.AddEquation = AddEquation;
	exports.AddOperation = AddOperation;
	exports.AdditiveAnimationBlendMode = AdditiveAnimationBlendMode;
	exports.AdditiveBlending = AdditiveBlending;
	exports.AlphaFormat = AlphaFormat;
	exports.AlwaysDepth = AlwaysDepth;
	exports.AlwaysStencilFunc = AlwaysStencilFunc;
	exports.AmbientLight = AmbientLight;
	exports.AmbientLightProbe = AmbientLightProbe;
	exports.AnimationClip = AnimationClip;
	exports.AnimationLoader = AnimationLoader;
	exports.AnimationMixer = AnimationMixer;
	exports.AnimationObjectGroup = AnimationObjectGroup;
	exports.AnimationUtils = AnimationUtils;
	exports.ArcCurve = ArcCurve;
	exports.ArrayCamera = ArrayCamera;
	exports.ArrowHelper = ArrowHelper;
	exports.Audio = Audio;
	exports.AudioAnalyser = AudioAnalyser;
	exports.AudioContext = AudioContext;
	exports.AudioListener = AudioListener;
	exports.AudioLoader = AudioLoader;
	exports.AxesHelper = AxesHelper;
	exports.AxisHelper = AxisHelper;
	exports.BackSide = BackSide;
	exports.BasicDepthPacking = BasicDepthPacking;
	exports.BasicShadowMap = BasicShadowMap;
	exports.BinaryTextureLoader = BinaryTextureLoader;
	exports.Bone = Bone;
	exports.BooleanKeyframeTrack = BooleanKeyframeTrack;
	exports.BoundingBoxHelper = BoundingBoxHelper;
	exports.Box2 = Box2;
	exports.Box3 = Box3;
	exports.Box3Helper = Box3Helper;
	exports.BoxBufferGeometry = BoxGeometry;
	exports.BoxGeometry = BoxGeometry;
	exports.BoxHelper = BoxHelper;
	exports.BufferAttribute = BufferAttribute;
	exports.BufferGeometry = BufferGeometry;
	exports.BufferGeometryLoader = BufferGeometryLoader;
	exports.ByteType = ByteType;
	exports.Cache = Cache;
	exports.Camera = Camera;
	exports.CameraHelper = CameraHelper;
	exports.CanvasRenderer = CanvasRenderer;
	exports.CanvasTexture = CanvasTexture;
	exports.CatmullRomCurve3 = CatmullRomCurve3;
	exports.CineonToneMapping = CineonToneMapping;
	exports.CircleBufferGeometry = CircleGeometry;
	exports.CircleGeometry = CircleGeometry;
	exports.ClampToEdgeWrapping = ClampToEdgeWrapping;
	exports.Clock = Clock;
	exports.ClosedSplineCurve3 = ClosedSplineCurve3;
	exports.Color = Color;
	exports.ColorKeyframeTrack = ColorKeyframeTrack;
	exports.CompressedTexture = CompressedTexture;
	exports.CompressedTextureLoader = CompressedTextureLoader;
	exports.ConeBufferGeometry = ConeGeometry;
	exports.ConeGeometry = ConeGeometry;
	exports.CubeCamera = CubeCamera;
	exports.CubeReflectionMapping = CubeReflectionMapping;
	exports.CubeRefractionMapping = CubeRefractionMapping;
	exports.CubeTexture = CubeTexture;
	exports.CubeTextureLoader = CubeTextureLoader;
	exports.CubeUVReflectionMapping = CubeUVReflectionMapping;
	exports.CubeUVRefractionMapping = CubeUVRefractionMapping;
	exports.CubicBezierCurve = CubicBezierCurve;
	exports.CubicBezierCurve3 = CubicBezierCurve3;
	exports.CubicInterpolant = CubicInterpolant;
	exports.CullFaceBack = CullFaceBack;
	exports.CullFaceFront = CullFaceFront;
	exports.CullFaceFrontBack = CullFaceFrontBack;
	exports.CullFaceNone = CullFaceNone;
	exports.Curve = Curve;
	exports.CurvePath = CurvePath;
	exports.CustomBlending = CustomBlending;
	exports.CustomToneMapping = CustomToneMapping;
	exports.CylinderBufferGeometry = CylinderGeometry;
	exports.CylinderGeometry = CylinderGeometry;
	exports.Cylindrical = Cylindrical;
	exports.DataTexture = DataTexture;
	exports.DataTexture2DArray = DataTexture2DArray;
	exports.DataTexture3D = DataTexture3D;
	exports.DataTextureLoader = DataTextureLoader;
	exports.DataUtils = DataUtils;
	exports.DecrementStencilOp = DecrementStencilOp;
	exports.DecrementWrapStencilOp = DecrementWrapStencilOp;
	exports.DefaultLoadingManager = DefaultLoadingManager;
	exports.DepthFormat = DepthFormat;
	exports.DepthStencilFormat = DepthStencilFormat;
	exports.DepthTexture = DepthTexture;
	exports.DirectionalLight = DirectionalLight;
	exports.DirectionalLightHelper = DirectionalLightHelper;
	exports.DiscreteInterpolant = DiscreteInterpolant;
	exports.DodecahedronBufferGeometry = DodecahedronGeometry;
	exports.DodecahedronGeometry = DodecahedronGeometry;
	exports.DoubleSide = DoubleSide;
	exports.DstAlphaFactor = DstAlphaFactor;
	exports.DstColorFactor = DstColorFactor;
	exports.DynamicBufferAttribute = DynamicBufferAttribute;
	exports.DynamicCopyUsage = DynamicCopyUsage;
	exports.DynamicDrawUsage = DynamicDrawUsage;
	exports.DynamicReadUsage = DynamicReadUsage;
	exports.EdgesGeometry = EdgesGeometry;
	exports.EdgesHelper = EdgesHelper;
	exports.EllipseCurve = EllipseCurve;
	exports.EqualDepth = EqualDepth;
	exports.EqualStencilFunc = EqualStencilFunc;
	exports.EquirectangularReflectionMapping = EquirectangularReflectionMapping;
	exports.EquirectangularRefractionMapping = EquirectangularRefractionMapping;
	exports.Euler = Euler;
	exports.EventDispatcher = EventDispatcher;
	exports.ExtrudeBufferGeometry = ExtrudeGeometry;
	exports.ExtrudeGeometry = ExtrudeGeometry;
	exports.Face3 = Face3;
	exports.Face4 = Face4;
	exports.FaceColors = FaceColors;
	exports.FileLoader = FileLoader;
	exports.FlatShading = FlatShading;
	exports.Float16BufferAttribute = Float16BufferAttribute;
	exports.Float32Attribute = Float32Attribute;
	exports.Float32BufferAttribute = Float32BufferAttribute;
	exports.Float64Attribute = Float64Attribute;
	exports.Float64BufferAttribute = Float64BufferAttribute;
	exports.FloatType = FloatType;
	exports.Fog = Fog;
	exports.FogExp2 = FogExp2;
	exports.Font = Font;
	exports.FontLoader = FontLoader;
	exports.FrontSide = FrontSide;
	exports.Frustum = Frustum;
	exports.GLBufferAttribute = GLBufferAttribute;
	exports.GLSL1 = GLSL1;
	exports.GLSL3 = GLSL3;
	exports.GammaEncoding = GammaEncoding;
	exports.GeometryUtils = GeometryUtils;
	exports.GreaterDepth = GreaterDepth;
	exports.GreaterEqualDepth = GreaterEqualDepth;
	exports.GreaterEqualStencilFunc = GreaterEqualStencilFunc;
	exports.GreaterStencilFunc = GreaterStencilFunc;
	exports.GridHelper = GridHelper;
	exports.Group = Group;
	exports.HalfFloatType = HalfFloatType;
	exports.HemisphereLight = HemisphereLight;
	exports.HemisphereLightHelper = HemisphereLightHelper;
	exports.HemisphereLightProbe = HemisphereLightProbe;
	exports.IcosahedronBufferGeometry = IcosahedronGeometry;
	exports.IcosahedronGeometry = IcosahedronGeometry;
	exports.ImageBitmapLoader = ImageBitmapLoader;
	exports.ImageLoader = ImageLoader;
	exports.ImageUtils = ImageUtils;
	exports.ImmediateRenderObject = ImmediateRenderObject;
	exports.IncrementStencilOp = IncrementStencilOp;
	exports.IncrementWrapStencilOp = IncrementWrapStencilOp;
	exports.InstancedBufferAttribute = InstancedBufferAttribute;
	exports.InstancedBufferGeometry = InstancedBufferGeometry;
	exports.InstancedInterleavedBuffer = InstancedInterleavedBuffer;
	exports.InstancedMesh = InstancedMesh;
	exports.Int16Attribute = Int16Attribute;
	exports.Int16BufferAttribute = Int16BufferAttribute;
	exports.Int32Attribute = Int32Attribute;
	exports.Int32BufferAttribute = Int32BufferAttribute;
	exports.Int8Attribute = Int8Attribute;
	exports.Int8BufferAttribute = Int8BufferAttribute;
	exports.IntType = IntType;
	exports.InterleavedBuffer = InterleavedBuffer;
	exports.InterleavedBufferAttribute = InterleavedBufferAttribute;
	exports.Interpolant = Interpolant;
	exports.InterpolateDiscrete = InterpolateDiscrete;
	exports.InterpolateLinear = InterpolateLinear;
	exports.InterpolateSmooth = InterpolateSmooth;
	exports.InvertStencilOp = InvertStencilOp;
	exports.JSONLoader = JSONLoader;
	exports.KeepStencilOp = KeepStencilOp;
	exports.KeyframeTrack = KeyframeTrack;
	exports.LOD = LOD;
	exports.LatheBufferGeometry = LatheGeometry;
	exports.LatheGeometry = LatheGeometry;
	exports.Layers = Layers;
	exports.LensFlare = LensFlare;
	exports.LessDepth = LessDepth;
	exports.LessEqualDepth = LessEqualDepth;
	exports.LessEqualStencilFunc = LessEqualStencilFunc;
	exports.LessStencilFunc = LessStencilFunc;
	exports.Light = Light;
	exports.LightProbe = LightProbe;
	exports.Line = Line;
	exports.Line3 = Line3;
	exports.LineBasicMaterial = LineBasicMaterial;
	exports.LineCurve = LineCurve;
	exports.LineCurve3 = LineCurve3;
	exports.LineDashedMaterial = LineDashedMaterial;
	exports.LineLoop = LineLoop;
	exports.LinePieces = LinePieces;
	exports.LineSegments = LineSegments;
	exports.LineStrip = LineStrip;
	exports.LinearEncoding = LinearEncoding;
	exports.LinearFilter = LinearFilter;
	exports.LinearInterpolant = LinearInterpolant;
	exports.LinearMipMapLinearFilter = LinearMipMapLinearFilter;
	exports.LinearMipMapNearestFilter = LinearMipMapNearestFilter;
	exports.LinearMipmapLinearFilter = LinearMipmapLinearFilter;
	exports.LinearMipmapNearestFilter = LinearMipmapNearestFilter;
	exports.LinearToneMapping = LinearToneMapping;
	exports.Loader = Loader;
	exports.LoaderUtils = LoaderUtils;
	exports.LoadingManager = LoadingManager;
	exports.LogLuvEncoding = LogLuvEncoding;
	exports.LoopOnce = LoopOnce;
	exports.LoopPingPong = LoopPingPong;
	exports.LoopRepeat = LoopRepeat;
	exports.LuminanceAlphaFormat = LuminanceAlphaFormat;
	exports.LuminanceFormat = LuminanceFormat;
	exports.MOUSE = MOUSE;
	exports.Material = Material;
	exports.MaterialLoader = MaterialLoader;
	exports.Math = MathUtils;
	exports.MathUtils = MathUtils;
	exports.Matrix3 = Matrix3;
	exports.Matrix4 = Matrix4;
	exports.MaxEquation = MaxEquation;
	exports.Mesh = Mesh;
	exports.MeshBasicMaterial = MeshBasicMaterial;
	exports.MeshDepthMaterial = MeshDepthMaterial;
	exports.MeshDistanceMaterial = MeshDistanceMaterial;
	exports.MeshFaceMaterial = MeshFaceMaterial;
	exports.MeshLambertMaterial = MeshLambertMaterial;
	exports.MeshMatcapMaterial = MeshMatcapMaterial;
	exports.MeshNormalMaterial = MeshNormalMaterial;
	exports.MeshPhongMaterial = MeshPhongMaterial;
	exports.MeshPhysicalMaterial = MeshPhysicalMaterial;
	exports.MeshStandardMaterial = MeshStandardMaterial;
	exports.MeshToonMaterial = MeshToonMaterial;
	exports.MinEquation = MinEquation;
	exports.MirroredRepeatWrapping = MirroredRepeatWrapping;
	exports.MixOperation = MixOperation;
	exports.MultiMaterial = MultiMaterial;
	exports.MultiplyBlending = MultiplyBlending;
	exports.MultiplyOperation = MultiplyOperation;
	exports.NearestFilter = NearestFilter;
	exports.NearestMipMapLinearFilter = NearestMipMapLinearFilter;
	exports.NearestMipMapNearestFilter = NearestMipMapNearestFilter;
	exports.NearestMipmapLinearFilter = NearestMipmapLinearFilter;
	exports.NearestMipmapNearestFilter = NearestMipmapNearestFilter;
	exports.NeverDepth = NeverDepth;
	exports.NeverStencilFunc = NeverStencilFunc;
	exports.NoBlending = NoBlending;
	exports.NoColors = NoColors;
	exports.NoToneMapping = NoToneMapping;
	exports.NormalAnimationBlendMode = NormalAnimationBlendMode;
	exports.NormalBlending = NormalBlending;
	exports.NotEqualDepth = NotEqualDepth;
	exports.NotEqualStencilFunc = NotEqualStencilFunc;
	exports.NumberKeyframeTrack = NumberKeyframeTrack;
	exports.Object3D = Object3D;
	exports.ObjectLoader = ObjectLoader;
	exports.ObjectSpaceNormalMap = ObjectSpaceNormalMap;
	exports.OctahedronBufferGeometry = OctahedronGeometry;
	exports.OctahedronGeometry = OctahedronGeometry;
	exports.OneFactor = OneFactor;
	exports.OneMinusDstAlphaFactor = OneMinusDstAlphaFactor;
	exports.OneMinusDstColorFactor = OneMinusDstColorFactor;
	exports.OneMinusSrcAlphaFactor = OneMinusSrcAlphaFactor;
	exports.OneMinusSrcColorFactor = OneMinusSrcColorFactor;
	exports.OrthographicCamera = OrthographicCamera;
	exports.PCFShadowMap = PCFShadowMap;
	exports.PCFSoftShadowMap = PCFSoftShadowMap;
	exports.PMREMGenerator = PMREMGenerator;
	exports.ParametricBufferGeometry = ParametricGeometry;
	exports.ParametricGeometry = ParametricGeometry;
	exports.Particle = Particle;
	exports.ParticleBasicMaterial = ParticleBasicMaterial;
	exports.ParticleSystem = ParticleSystem;
	exports.ParticleSystemMaterial = ParticleSystemMaterial;
	exports.Path = Path;
	exports.PerspectiveCamera = PerspectiveCamera;
	exports.Plane = Plane;
	exports.PlaneBufferGeometry = PlaneGeometry;
	exports.PlaneGeometry = PlaneGeometry;
	exports.PlaneHelper = PlaneHelper;
	exports.PointCloud = PointCloud;
	exports.PointCloudMaterial = PointCloudMaterial;
	exports.PointLight = PointLight;
	exports.PointLightHelper = PointLightHelper;
	exports.Points = Points;
	exports.PointsMaterial = PointsMaterial;
	exports.PolarGridHelper = PolarGridHelper;
	exports.PolyhedronBufferGeometry = PolyhedronGeometry;
	exports.PolyhedronGeometry = PolyhedronGeometry;
	exports.PositionalAudio = PositionalAudio;
	exports.PropertyBinding = PropertyBinding;
	exports.PropertyMixer = PropertyMixer;
	exports.QuadraticBezierCurve = QuadraticBezierCurve;
	exports.QuadraticBezierCurve3 = QuadraticBezierCurve3;
	exports.Quaternion = Quaternion;
	exports.QuaternionKeyframeTrack = QuaternionKeyframeTrack;
	exports.QuaternionLinearInterpolant = QuaternionLinearInterpolant;
	exports.REVISION = REVISION;
	exports.RGBADepthPacking = RGBADepthPacking;
	exports.RGBAFormat = RGBAFormat;
	exports.RGBAIntegerFormat = RGBAIntegerFormat;
	exports.RGBA_ASTC_10x10_Format = RGBA_ASTC_10x10_Format;
	exports.RGBA_ASTC_10x5_Format = RGBA_ASTC_10x5_Format;
	exports.RGBA_ASTC_10x6_Format = RGBA_ASTC_10x6_Format;
	exports.RGBA_ASTC_10x8_Format = RGBA_ASTC_10x8_Format;
	exports.RGBA_ASTC_12x10_Format = RGBA_ASTC_12x10_Format;
	exports.RGBA_ASTC_12x12_Format = RGBA_ASTC_12x12_Format;
	exports.RGBA_ASTC_4x4_Format = RGBA_ASTC_4x4_Format;
	exports.RGBA_ASTC_5x4_Format = RGBA_ASTC_5x4_Format;
	exports.RGBA_ASTC_5x5_Format = RGBA_ASTC_5x5_Format;
	exports.RGBA_ASTC_6x5_Format = RGBA_ASTC_6x5_Format;
	exports.RGBA_ASTC_6x6_Format = RGBA_ASTC_6x6_Format;
	exports.RGBA_ASTC_8x5_Format = RGBA_ASTC_8x5_Format;
	exports.RGBA_ASTC_8x6_Format = RGBA_ASTC_8x6_Format;
	exports.RGBA_ASTC_8x8_Format = RGBA_ASTC_8x8_Format;
	exports.RGBA_BPTC_Format = RGBA_BPTC_Format;
	exports.RGBA_ETC2_EAC_Format = RGBA_ETC2_EAC_Format;
	exports.RGBA_PVRTC_2BPPV1_Format = RGBA_PVRTC_2BPPV1_Format;
	exports.RGBA_PVRTC_4BPPV1_Format = RGBA_PVRTC_4BPPV1_Format;
	exports.RGBA_S3TC_DXT1_Format = RGBA_S3TC_DXT1_Format;
	exports.RGBA_S3TC_DXT3_Format = RGBA_S3TC_DXT3_Format;
	exports.RGBA_S3TC_DXT5_Format = RGBA_S3TC_DXT5_Format;
	exports.RGBDEncoding = RGBDEncoding;
	exports.RGBEEncoding = RGBEEncoding;
	exports.RGBEFormat = RGBEFormat;
	exports.RGBFormat = RGBFormat;
	exports.RGBIntegerFormat = RGBIntegerFormat;
	exports.RGBM16Encoding = RGBM16Encoding;
	exports.RGBM7Encoding = RGBM7Encoding;
	exports.RGB_ETC1_Format = RGB_ETC1_Format;
	exports.RGB_ETC2_Format = RGB_ETC2_Format;
	exports.RGB_PVRTC_2BPPV1_Format = RGB_PVRTC_2BPPV1_Format;
	exports.RGB_PVRTC_4BPPV1_Format = RGB_PVRTC_4BPPV1_Format;
	exports.RGB_S3TC_DXT1_Format = RGB_S3TC_DXT1_Format;
	exports.RGFormat = RGFormat;
	exports.RGIntegerFormat = RGIntegerFormat;
	exports.RawShaderMaterial = RawShaderMaterial;
	exports.Ray = Ray;
	exports.Raycaster = Raycaster;
	exports.RectAreaLight = RectAreaLight;
	exports.RedFormat = RedFormat;
	exports.RedIntegerFormat = RedIntegerFormat;
	exports.ReinhardToneMapping = ReinhardToneMapping;
	exports.RepeatWrapping = RepeatWrapping;
	exports.ReplaceStencilOp = ReplaceStencilOp;
	exports.ReverseSubtractEquation = ReverseSubtractEquation;
	exports.RingBufferGeometry = RingGeometry;
	exports.RingGeometry = RingGeometry;
	exports.SRGB8_ALPHA8_ASTC_10x10_Format = SRGB8_ALPHA8_ASTC_10x10_Format;
	exports.SRGB8_ALPHA8_ASTC_10x5_Format = SRGB8_ALPHA8_ASTC_10x5_Format;
	exports.SRGB8_ALPHA8_ASTC_10x6_Format = SRGB8_ALPHA8_ASTC_10x6_Format;
	exports.SRGB8_ALPHA8_ASTC_10x8_Format = SRGB8_ALPHA8_ASTC_10x8_Format;
	exports.SRGB8_ALPHA8_ASTC_12x10_Format = SRGB8_ALPHA8_ASTC_12x10_Format;
	exports.SRGB8_ALPHA8_ASTC_12x12_Format = SRGB8_ALPHA8_ASTC_12x12_Format;
	exports.SRGB8_ALPHA8_ASTC_4x4_Format = SRGB8_ALPHA8_ASTC_4x4_Format;
	exports.SRGB8_ALPHA8_ASTC_5x4_Format = SRGB8_ALPHA8_ASTC_5x4_Format;
	exports.SRGB8_ALPHA8_ASTC_5x5_Format = SRGB8_ALPHA8_ASTC_5x5_Format;
	exports.SRGB8_ALPHA8_ASTC_6x5_Format = SRGB8_ALPHA8_ASTC_6x5_Format;
	exports.SRGB8_ALPHA8_ASTC_6x6_Format = SRGB8_ALPHA8_ASTC_6x6_Format;
	exports.SRGB8_ALPHA8_ASTC_8x5_Format = SRGB8_ALPHA8_ASTC_8x5_Format;
	exports.SRGB8_ALPHA8_ASTC_8x6_Format = SRGB8_ALPHA8_ASTC_8x6_Format;
	exports.SRGB8_ALPHA8_ASTC_8x8_Format = SRGB8_ALPHA8_ASTC_8x8_Format;
	exports.Scene = Scene;
	exports.SceneUtils = SceneUtils;
	exports.ShaderChunk = ShaderChunk;
	exports.ShaderLib = ShaderLib;
	exports.ShaderMaterial = ShaderMaterial;
	exports.ShadowMaterial = ShadowMaterial;
	exports.Shape = Shape;
	exports.ShapeBufferGeometry = ShapeGeometry;
	exports.ShapeGeometry = ShapeGeometry;
	exports.ShapePath = ShapePath;
	exports.ShapeUtils = ShapeUtils;
	exports.ShortType = ShortType;
	exports.Skeleton = Skeleton;
	exports.SkeletonHelper = SkeletonHelper;
	exports.SkinnedMesh = SkinnedMesh;
	exports.SmoothShading = SmoothShading;
	exports.Sphere = Sphere;
	exports.SphereBufferGeometry = SphereGeometry;
	exports.SphereGeometry = SphereGeometry;
	exports.Spherical = Spherical;
	exports.SphericalHarmonics3 = SphericalHarmonics3;
	exports.Spline = Spline;
	exports.SplineCurve = SplineCurve;
	exports.SplineCurve3 = SplineCurve3;
	exports.SpotLight = SpotLight;
	exports.SpotLightHelper = SpotLightHelper;
	exports.Sprite = Sprite;
	exports.SpriteMaterial = SpriteMaterial;
	exports.SrcAlphaFactor = SrcAlphaFactor;
	exports.SrcAlphaSaturateFactor = SrcAlphaSaturateFactor;
	exports.SrcColorFactor = SrcColorFactor;
	exports.StaticCopyUsage = StaticCopyUsage;
	exports.StaticDrawUsage = StaticDrawUsage;
	exports.StaticReadUsage = StaticReadUsage;
	exports.StereoCamera = StereoCamera;
	exports.StreamCopyUsage = StreamCopyUsage;
	exports.StreamDrawUsage = StreamDrawUsage;
	exports.StreamReadUsage = StreamReadUsage;
	exports.StringKeyframeTrack = StringKeyframeTrack;
	exports.SubtractEquation = SubtractEquation;
	exports.SubtractiveBlending = SubtractiveBlending;
	exports.TOUCH = TOUCH;
	exports.TangentSpaceNormalMap = TangentSpaceNormalMap;
	exports.TetrahedronBufferGeometry = TetrahedronGeometry;
	exports.TetrahedronGeometry = TetrahedronGeometry;
	exports.TextBufferGeometry = TextGeometry;
	exports.TextGeometry = TextGeometry;
	exports.Texture = Texture;
	exports.TextureLoader = TextureLoader;
	exports.TorusBufferGeometry = TorusGeometry;
	exports.TorusGeometry = TorusGeometry;
	exports.TorusKnotBufferGeometry = TorusKnotGeometry;
	exports.TorusKnotGeometry = TorusKnotGeometry;
	exports.Triangle = Triangle;
	exports.TriangleFanDrawMode = TriangleFanDrawMode;
	exports.TriangleStripDrawMode = TriangleStripDrawMode;
	exports.TrianglesDrawMode = TrianglesDrawMode;
	exports.TubeBufferGeometry = TubeGeometry;
	exports.TubeGeometry = TubeGeometry;
	exports.UVMapping = UVMapping;
	exports.Uint16Attribute = Uint16Attribute;
	exports.Uint16BufferAttribute = Uint16BufferAttribute;
	exports.Uint32Attribute = Uint32Attribute;
	exports.Uint32BufferAttribute = Uint32BufferAttribute;
	exports.Uint8Attribute = Uint8Attribute;
	exports.Uint8BufferAttribute = Uint8BufferAttribute;
	exports.Uint8ClampedAttribute = Uint8ClampedAttribute;
	exports.Uint8ClampedBufferAttribute = Uint8ClampedBufferAttribute;
	exports.Uniform = Uniform;
	exports.UniformsLib = UniformsLib;
	exports.UniformsUtils = UniformsUtils;
	exports.UnsignedByteType = UnsignedByteType;
	exports.UnsignedInt248Type = UnsignedInt248Type;
	exports.UnsignedIntType = UnsignedIntType;
	exports.UnsignedShort4444Type = UnsignedShort4444Type;
	exports.UnsignedShort5551Type = UnsignedShort5551Type;
	exports.UnsignedShort565Type = UnsignedShort565Type;
	exports.UnsignedShortType = UnsignedShortType;
	exports.VSMShadowMap = VSMShadowMap;
	exports.Vector2 = Vector2;
	exports.Vector3 = Vector3;
	exports.Vector4 = Vector4;
	exports.VectorKeyframeTrack = VectorKeyframeTrack;
	exports.Vertex = Vertex;
	exports.VertexColors = VertexColors;
	exports.VideoTexture = VideoTexture;
	exports.WebGL1Renderer = WebGL1Renderer;
	exports.WebGLCubeRenderTarget = WebGLCubeRenderTarget;
	exports.WebGLMultisampleRenderTarget = WebGLMultisampleRenderTarget;
	exports.WebGLRenderTarget = WebGLRenderTarget;
	exports.WebGLRenderTargetCube = WebGLRenderTargetCube;
	exports.WebGLRenderer = WebGLRenderer;
	exports.WebGLUtils = WebGLUtils;
	exports.WireframeGeometry = WireframeGeometry;
	exports.WireframeHelper = WireframeHelper;
	exports.WrapAroundEnding = WrapAroundEnding;
	exports.XHRLoader = XHRLoader;
	exports.ZeroCurvatureEnding = ZeroCurvatureEnding;
	exports.ZeroFactor = ZeroFactor;
	exports.ZeroSlopeEnding = ZeroSlopeEnding;
	exports.ZeroStencilOp = ZeroStencilOp;
	exports.sRGBEncoding = sRGBEncoding;

	Object.defineProperty(exports, '__esModule', { value: true });

})));

},{}],38:[function(_dereq_,module,exports){
THREE.DRACOLoader = function ( manager ) {

	THREE.Loader.call( this, manager );

	this.decoderPath = '';
	this.decoderConfig = {};
	this.decoderBinary = null;
	this.decoderPending = null;

	this.workerLimit = 4;
	this.workerPool = [];
	this.workerNextTaskID = 1;
	this.workerSourceURL = '';

	this.defaultAttributeIDs = {
		position: 'POSITION',
		normal: 'NORMAL',
		color: 'COLOR',
		uv: 'TEX_COORD'
	};
	this.defaultAttributeTypes = {
		position: 'Float32Array',
		normal: 'Float32Array',
		color: 'Float32Array',
		uv: 'Float32Array'
	};

};

THREE.DRACOLoader.prototype = Object.assign( Object.create( THREE.Loader.prototype ), {

	constructor: THREE.DRACOLoader,

	setDecoderPath: function ( path ) {

		this.decoderPath = path;

		return this;

	},

	setDecoderConfig: function ( config ) {

		this.decoderConfig = config;

		return this;

	},

	setWorkerLimit: function ( workerLimit ) {

		this.workerLimit = workerLimit;

		return this;

	},

	/** @deprecated */
	setVerbosity: function () {

		console.warn( 'THREE.DRACOLoader: The .setVerbosity() method has been removed.' );

	},

	/** @deprecated */
	setDrawMode: function () {

		console.warn( 'THREE.DRACOLoader: The .setDrawMode() method has been removed.' );

	},

	/** @deprecated */
	setSkipDequantization: function () {

		console.warn( 'THREE.DRACOLoader: The .setSkipDequantization() method has been removed.' );

	},

	load: function ( url, onLoad, onProgress, onError ) {

		var loader = new THREE.FileLoader( this.manager );

		loader.setPath( this.path );
		loader.setResponseType( 'arraybuffer' );
		loader.setRequestHeader( this.requestHeader );
		loader.setWithCredentials( this.withCredentials );

		loader.load( url, ( buffer ) => {

			var taskConfig = {
				attributeIDs: this.defaultAttributeIDs,
				attributeTypes: this.defaultAttributeTypes,
				useUniqueIDs: false
			};

			this.decodeGeometry( buffer, taskConfig )
				.then( onLoad )
				.catch( onError );

		}, onProgress, onError );

	},

	/** @deprecated Kept for backward-compatibility with previous DRACOLoader versions. */
	decodeDracoFile: function ( buffer, callback, attributeIDs, attributeTypes ) {

		var taskConfig = {
			attributeIDs: attributeIDs || this.defaultAttributeIDs,
			attributeTypes: attributeTypes || this.defaultAttributeTypes,
			useUniqueIDs: !! attributeIDs
		};

		this.decodeGeometry( buffer, taskConfig ).then( callback );

	},

	decodeGeometry: function ( buffer, taskConfig ) {

		// TODO: For backward-compatibility, support 'attributeTypes' objects containing
		// references (rather than names) to typed array constructors. These must be
		// serialized before sending them to the worker.
		for ( var attribute in taskConfig.attributeTypes ) {

			var type = taskConfig.attributeTypes[ attribute ];

			if ( type.BYTES_PER_ELEMENT !== undefined ) {

				taskConfig.attributeTypes[ attribute ] = type.name;

			}

		}

		//

		var taskKey = JSON.stringify( taskConfig );

		// Check for an existing task using this buffer. A transferred buffer cannot be transferred
		// again from this thread.
		if ( THREE.DRACOLoader.taskCache.has( buffer ) ) {

			var cachedTask = THREE.DRACOLoader.taskCache.get( buffer );

			if ( cachedTask.key === taskKey ) {

				return cachedTask.promise;

			} else if ( buffer.byteLength === 0 ) {

				// Technically, it would be possible to wait for the previous task to complete,
				// transfer the buffer back, and decode again with the second configuration. That
				// is complex, and I don't know of any reason to decode a Draco buffer twice in
				// different ways, so this is left unimplemented.
				throw new Error(

					'THREE.DRACOLoader: Unable to re-decode a buffer with different ' +
					'settings. Buffer has already been transferred.'

				);

			}

		}

		//

		var worker;
		var taskID = this.workerNextTaskID ++;
		var taskCost = buffer.byteLength;

		// Obtain a worker and assign a task, and construct a geometry instance
		// when the task completes.
		var geometryPending = this._getWorker( taskID, taskCost )
			.then( ( _worker ) => {

				worker = _worker;

				return new Promise( ( resolve, reject ) => {

					worker._callbacks[ taskID ] = { resolve, reject };

					worker.postMessage( { type: 'decode', id: taskID, taskConfig, buffer }, [ buffer ] );

					// this.debug();

				} );

			} )
			.then( ( message ) => this._createGeometry( message.geometry ) );

		// Remove task from the task list.
		// Note: replaced '.finally()' with '.catch().then()' block - iOS 11 support (#19416)
		geometryPending
			.catch( () => true )
			.then( () => {

				if ( worker && taskID ) {

					this._releaseTask( worker, taskID );

					// this.debug();

				}

			} );

		// Cache the task result.
		THREE.DRACOLoader.taskCache.set( buffer, {

			key: taskKey,
			promise: geometryPending

		} );

		return geometryPending;

	},

	_createGeometry: function ( geometryData ) {

		var geometry = new THREE.BufferGeometry();

		if ( geometryData.index ) {

			geometry.setIndex( new THREE.BufferAttribute( geometryData.index.array, 1 ) );

		}

		for ( var i = 0; i < geometryData.attributes.length; i ++ ) {

			var attribute = geometryData.attributes[ i ];
			var name = attribute.name;
			var array = attribute.array;
			var itemSize = attribute.itemSize;

			geometry.setAttribute( name, new THREE.BufferAttribute( array, itemSize ) );

		}

		return geometry;

	},

	_loadLibrary: function ( url, responseType ) {

		var loader = new THREE.FileLoader( this.manager );
		loader.setPath( this.decoderPath );
		loader.setResponseType( responseType );
		loader.setWithCredentials( this.withCredentials );

		return new Promise( ( resolve, reject ) => {

			loader.load( url, resolve, undefined, reject );

		} );

	},

	preload: function () {

		this._initDecoder();

		return this;

	},

	_initDecoder: function () {

		if ( this.decoderPending ) return this.decoderPending;

		var useJS = typeof WebAssembly !== 'object' || this.decoderConfig.type === 'js';
		var librariesPending = [];

		if ( useJS ) {

			librariesPending.push( this._loadLibrary( 'draco_decoder.js', 'text' ) );

		} else {

			librariesPending.push( this._loadLibrary( 'draco_wasm_wrapper.js', 'text' ) );
			librariesPending.push( this._loadLibrary( 'draco_decoder.wasm', 'arraybuffer' ) );

		}

		this.decoderPending = Promise.all( librariesPending )
			.then( ( libraries ) => {

				var jsContent = libraries[ 0 ];

				if ( ! useJS ) {

					this.decoderConfig.wasmBinary = libraries[ 1 ];

				}

				var fn = THREE.DRACOLoader.DRACOWorker.toString();

				var body = [
					'/* draco decoder */',
					jsContent,
					'',
					'/* worker */',
					fn.substring( fn.indexOf( '{' ) + 1, fn.lastIndexOf( '}' ) )
				].join( '\n' );

				this.workerSourceURL = URL.createObjectURL( new Blob( [ body ] ) );

			} );

		return this.decoderPending;

	},

	_getWorker: function ( taskID, taskCost ) {

		return this._initDecoder().then( () => {

			if ( this.workerPool.length < this.workerLimit ) {

				var worker = new Worker( this.workerSourceURL );

				worker._callbacks = {};
				worker._taskCosts = {};
				worker._taskLoad = 0;

				worker.postMessage( { type: 'init', decoderConfig: this.decoderConfig } );

				worker.onmessage = function ( e ) {

					var message = e.data;

					switch ( message.type ) {

						case 'decode':
							worker._callbacks[ message.id ].resolve( message );
							break;

						case 'error':
							worker._callbacks[ message.id ].reject( message );
							break;

						default:
							console.error( 'THREE.DRACOLoader: Unexpected message, "' + message.type + '"' );

					}

				};

				this.workerPool.push( worker );

			} else {

				this.workerPool.sort( function ( a, b ) {

					return a._taskLoad > b._taskLoad ? - 1 : 1;

				} );

			}

			var worker = this.workerPool[ this.workerPool.length - 1 ];
			worker._taskCosts[ taskID ] = taskCost;
			worker._taskLoad += taskCost;
			return worker;

		} );

	},

	_releaseTask: function ( worker, taskID ) {

		worker._taskLoad -= worker._taskCosts[ taskID ];
		delete worker._callbacks[ taskID ];
		delete worker._taskCosts[ taskID ];

	},

	debug: function () {

		console.log( 'Task load: ', this.workerPool.map( ( worker ) => worker._taskLoad ) );

	},

	dispose: function () {

		for ( var i = 0; i < this.workerPool.length; ++ i ) {

			this.workerPool[ i ].terminate();

		}

		this.workerPool.length = 0;

		return this;

	}

} );

/* WEB WORKER */

THREE.DRACOLoader.DRACOWorker = function () {

	var decoderConfig;
	var decoderPending;

	onmessage = function ( e ) {

		var message = e.data;

		switch ( message.type ) {

			case 'init':
				decoderConfig = message.decoderConfig;
				decoderPending = new Promise( function ( resolve/*, reject*/ ) {

					decoderConfig.onModuleLoaded = function ( draco ) {

						// Module is Promise-like. Wrap before resolving to avoid loop.
						resolve( { draco: draco } );

					};

					DracoDecoderModule( decoderConfig ); // eslint-disable-line no-undef

				} );
				break;

			case 'decode':
				var buffer = message.buffer;
				var taskConfig = message.taskConfig;
				decoderPending.then( ( module ) => {

					var draco = module.draco;
					var decoder = new draco.Decoder();
					var decoderBuffer = new draco.DecoderBuffer();
					decoderBuffer.Init( new Int8Array( buffer ), buffer.byteLength );

					try {

						var geometry = decodeGeometry( draco, decoder, decoderBuffer, taskConfig );

						var buffers = geometry.attributes.map( ( attr ) => attr.array.buffer );

						if ( geometry.index ) buffers.push( geometry.index.array.buffer );

						self.postMessage( { type: 'decode', id: message.id, geometry }, buffers );

					} catch ( error ) {

						console.error( error );

						self.postMessage( { type: 'error', id: message.id, error: error.message } );

					} finally {

						draco.destroy( decoderBuffer );
						draco.destroy( decoder );

					}

				} );
				break;

		}

	};

	function decodeGeometry( draco, decoder, decoderBuffer, taskConfig ) {

		var attributeIDs = taskConfig.attributeIDs;
		var attributeTypes = taskConfig.attributeTypes;

		var dracoGeometry;
		var decodingStatus;

		var geometryType = decoder.GetEncodedGeometryType( decoderBuffer );

		if ( geometryType === draco.TRIANGULAR_MESH ) {

			dracoGeometry = new draco.Mesh();
			decodingStatus = decoder.DecodeBufferToMesh( decoderBuffer, dracoGeometry );

		} else if ( geometryType === draco.POINT_CLOUD ) {

			dracoGeometry = new draco.PointCloud();
			decodingStatus = decoder.DecodeBufferToPointCloud( decoderBuffer, dracoGeometry );

		} else {

			throw new Error( 'THREE.DRACOLoader: Unexpected geometry type.' );

		}

		if ( ! decodingStatus.ok() || dracoGeometry.ptr === 0 ) {

			throw new Error( 'THREE.DRACOLoader: Decoding failed: ' + decodingStatus.error_msg() );

		}

		var geometry = { index: null, attributes: [] };

		// Gather all vertex attributes.
		for ( var attributeName in attributeIDs ) {

			var attributeType = self[ attributeTypes[ attributeName ] ];

			var attribute;
			var attributeID;

			// A Draco file may be created with default vertex attributes, whose attribute IDs
			// are mapped 1:1 from their semantic name (POSITION, NORMAL, ...). Alternatively,
			// a Draco file may contain a custom set of attributes, identified by known unique
			// IDs. glTF files always do the latter, and `.drc` files typically do the former.
			if ( taskConfig.useUniqueIDs ) {

				attributeID = attributeIDs[ attributeName ];
				attribute = decoder.GetAttributeByUniqueId( dracoGeometry, attributeID );

			} else {

				attributeID = decoder.GetAttributeId( dracoGeometry, draco[ attributeIDs[ attributeName ] ] );

				if ( attributeID === - 1 ) continue;

				attribute = decoder.GetAttribute( dracoGeometry, attributeID );

			}

			geometry.attributes.push( decodeAttribute( draco, decoder, dracoGeometry, attributeName, attributeType, attribute ) );

		}

		// Add index.
		if ( geometryType === draco.TRIANGULAR_MESH ) {

			geometry.index = decodeIndex( draco, decoder, dracoGeometry );

		}

		draco.destroy( dracoGeometry );

		return geometry;

	}

	function decodeIndex( draco, decoder, dracoGeometry ) {

		var numFaces = dracoGeometry.num_faces();
		var numIndices = numFaces * 3;
		var byteLength = numIndices * 4;

		var ptr = draco._malloc( byteLength );
		decoder.GetTrianglesUInt32Array( dracoGeometry, byteLength, ptr );
		var index = new Uint32Array( draco.HEAPF32.buffer, ptr, numIndices ).slice();
		draco._free( ptr );

		return { array: index, itemSize: 1 };

	}

	function decodeAttribute( draco, decoder, dracoGeometry, attributeName, attributeType, attribute ) {

		var numComponents = attribute.num_components();
		var numPoints = dracoGeometry.num_points();
		var numValues = numPoints * numComponents;
		var byteLength = numValues * attributeType.BYTES_PER_ELEMENT;
		var dataType = getDracoDataType( draco, attributeType );

		var ptr = draco._malloc( byteLength );
		decoder.GetAttributeDataArrayForAllPoints( dracoGeometry, attribute, dataType, byteLength, ptr );
		var array = new attributeType( draco.HEAPF32.buffer, ptr, numValues ).slice();
		draco._free( ptr );

		return {
			name: attributeName,
			array: array,
			itemSize: numComponents
		};

	}

	function getDracoDataType( draco, attributeType ) {

		switch ( attributeType ) {

			case Float32Array: return draco.DT_FLOAT32;
			case Int8Array: return draco.DT_INT8;
			case Int16Array: return draco.DT_INT16;
			case Int32Array: return draco.DT_INT32;
			case Uint8Array: return draco.DT_UINT8;
			case Uint16Array: return draco.DT_UINT16;
			case Uint32Array: return draco.DT_UINT32;

		}

	}

};

THREE.DRACOLoader.taskCache = new WeakMap();

/** Deprecated static methods */

/** @deprecated */
THREE.DRACOLoader.setDecoderPath = function () {

	console.warn( 'THREE.DRACOLoader: The .setDecoderPath() method has been removed. Use instance methods.' );

};

/** @deprecated */
THREE.DRACOLoader.setDecoderConfig = function () {

	console.warn( 'THREE.DRACOLoader: The .setDecoderConfig() method has been removed. Use instance methods.' );

};

/** @deprecated */
THREE.DRACOLoader.releaseDecoderModule = function () {

	console.warn( 'THREE.DRACOLoader: The .releaseDecoderModule() method has been removed. Use instance methods.' );

};

/** @deprecated */
THREE.DRACOLoader.getDecoderModule = function () {

	console.warn( 'THREE.DRACOLoader: The .getDecoderModule() method has been removed. Use instance methods.' );

};

},{}],39:[function(_dereq_,module,exports){
THREE.GLTFLoader = ( function () {

	function GLTFLoader( manager ) {

		THREE.Loader.call( this, manager );

		this.dracoLoader = null;
		this.ddsLoader = null;
		this.ktx2Loader = null;
		this.meshoptDecoder = null;

		this.pluginCallbacks = [];

		this.register( function ( parser ) {

			return new GLTFMaterialsClearcoatExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFTextureBasisUExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFTextureWebPExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFMaterialsTransmissionExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFLightsExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFMeshoptCompression( parser );

		} );

	}

	GLTFLoader.prototype = Object.assign( Object.create( THREE.Loader.prototype ), {

		constructor: GLTFLoader,

		load: function ( url, onLoad, onProgress, onError ) {

			var scope = this;

			var resourcePath;

			if ( this.resourcePath !== '' ) {

				resourcePath = this.resourcePath;

			} else if ( this.path !== '' ) {

				resourcePath = this.path;

			} else {

				resourcePath = THREE.LoaderUtils.extractUrlBase( url );

			}

			// Tells the LoadingManager to track an extra item, which resolves after
			// the model is fully loaded. This means the count of items loaded will
			// be incorrect, but ensures manager.onLoad() does not fire early.
			this.manager.itemStart( url );

			var _onError = function ( e ) {

				if ( onError ) {

					onError( e );

				} else {

					console.error( e );

				}

				scope.manager.itemError( url );
				scope.manager.itemEnd( url );

			};

			var loader = new THREE.FileLoader( this.manager );

			loader.setPath( this.path );
			loader.setResponseType( 'arraybuffer' );
			loader.setRequestHeader( this.requestHeader );
			loader.setWithCredentials( this.withCredentials );

			loader.load( url, function ( data ) {

				try {

					scope.parse( data, resourcePath, function ( gltf ) {

						onLoad( gltf );

						scope.manager.itemEnd( url );

					}, _onError );

				} catch ( e ) {

					_onError( e );

				}

			}, onProgress, _onError );

		},

		setDRACOLoader: function ( dracoLoader ) {

			this.dracoLoader = dracoLoader;
			return this;

		},

		setDDSLoader: function ( ddsLoader ) {

			this.ddsLoader = ddsLoader;
			return this;

		},

		setKTX2Loader: function ( ktx2Loader ) {

			this.ktx2Loader = ktx2Loader;
			return this;

		},

		setMeshoptDecoder: function ( meshoptDecoder ) {

			this.meshoptDecoder = meshoptDecoder;
			return this;

		},

		register: function ( callback ) {

			if ( this.pluginCallbacks.indexOf( callback ) === - 1 ) {

				this.pluginCallbacks.push( callback );

			}

			return this;

		},

		unregister: function ( callback ) {

			if ( this.pluginCallbacks.indexOf( callback ) !== - 1 ) {

				this.pluginCallbacks.splice( this.pluginCallbacks.indexOf( callback ), 1 );

			}

			return this;

		},

		parse: function ( data, path, onLoad, onError ) {

			var content;
			var extensions = {};
			var plugins = {};

			if ( typeof data === 'string' ) {

				content = data;

			} else {

				var magic = THREE.LoaderUtils.decodeText( new Uint8Array( data, 0, 4 ) );

				if ( magic === BINARY_EXTENSION_HEADER_MAGIC ) {

					try {

						extensions[ EXTENSIONS.KHR_BINARY_GLTF ] = new GLTFBinaryExtension( data );

					} catch ( error ) {

						if ( onError ) onError( error );
						return;

					}

					content = extensions[ EXTENSIONS.KHR_BINARY_GLTF ].content;

				} else {

					content = THREE.LoaderUtils.decodeText( new Uint8Array( data ) );

				}

			}

			var json = JSON.parse( content );

			if ( json.asset === undefined || json.asset.version[ 0 ] < 2 ) {

				if ( onError ) onError( new Error( 'THREE.GLTFLoader: Unsupported asset. glTF versions >=2.0 are supported.' ) );
				return;

			}

			var parser = new GLTFParser( json, {

				path: path || this.resourcePath || '',
				crossOrigin: this.crossOrigin,
				manager: this.manager,
				ktx2Loader: this.ktx2Loader,
				meshoptDecoder: this.meshoptDecoder

			} );

			parser.fileLoader.setRequestHeader( this.requestHeader );

			for ( var i = 0; i < this.pluginCallbacks.length; i ++ ) {

				var plugin = this.pluginCallbacks[ i ]( parser );
				plugins[ plugin.name ] = plugin;

				// Workaround to avoid determining as unknown extension
				// in addUnknownExtensionsToUserData().
				// Remove this workaround if we move all the existing
				// extension handlers to plugin system
				extensions[ plugin.name ] = true;

			}

			if ( json.extensionsUsed ) {

				for ( var i = 0; i < json.extensionsUsed.length; ++ i ) {

					var extensionName = json.extensionsUsed[ i ];
					var extensionsRequired = json.extensionsRequired || [];

					switch ( extensionName ) {

						case EXTENSIONS.KHR_MATERIALS_UNLIT:
							extensions[ extensionName ] = new GLTFMaterialsUnlitExtension();
							break;

						case EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS:
							extensions[ extensionName ] = new GLTFMaterialsPbrSpecularGlossinessExtension();
							break;

						case EXTENSIONS.KHR_DRACO_MESH_COMPRESSION:
							extensions[ extensionName ] = new GLTFDracoMeshCompressionExtension( json, this.dracoLoader );
							break;

						case EXTENSIONS.MSFT_TEXTURE_DDS:
							extensions[ extensionName ] = new GLTFTextureDDSExtension( this.ddsLoader );
							break;

						case EXTENSIONS.KHR_TEXTURE_TRANSFORM:
							extensions[ extensionName ] = new GLTFTextureTransformExtension();
							break;

						case EXTENSIONS.KHR_MESH_QUANTIZATION:
							extensions[ extensionName ] = new GLTFMeshQuantizationExtension();
							break;

						default:

							if ( extensionsRequired.indexOf( extensionName ) >= 0 && plugins[ extensionName ] === undefined ) {

								console.warn( 'THREE.GLTFLoader: Unknown extension "' + extensionName + '".' );

							}

					}

				}

			}

			parser.setExtensions( extensions );
			parser.setPlugins( plugins );
			parser.parse( onLoad, onError );

		}

	} );

	/* GLTFREGISTRY */

	function GLTFRegistry() {

		var objects = {};

		return	{

			get: function ( key ) {

				return objects[ key ];

			},

			add: function ( key, object ) {

				objects[ key ] = object;

			},

			remove: function ( key ) {

				delete objects[ key ];

			},

			removeAll: function () {

				objects = {};

			}

		};

	}

	/*********************************/
	/********** EXTENSIONS ***********/
	/*********************************/

	var EXTENSIONS = {
		KHR_BINARY_GLTF: 'KHR_binary_glTF',
		KHR_DRACO_MESH_COMPRESSION: 'KHR_draco_mesh_compression',
		KHR_LIGHTS_PUNCTUAL: 'KHR_lights_punctual',
		KHR_MATERIALS_CLEARCOAT: 'KHR_materials_clearcoat',
		KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS: 'KHR_materials_pbrSpecularGlossiness',
		KHR_MATERIALS_TRANSMISSION: 'KHR_materials_transmission',
		KHR_MATERIALS_UNLIT: 'KHR_materials_unlit',
		KHR_TEXTURE_BASISU: 'KHR_texture_basisu',
		KHR_TEXTURE_TRANSFORM: 'KHR_texture_transform',
		KHR_MESH_QUANTIZATION: 'KHR_mesh_quantization',
		EXT_TEXTURE_WEBP: 'EXT_texture_webp',
		EXT_MESHOPT_COMPRESSION: 'EXT_meshopt_compression',
		MSFT_TEXTURE_DDS: 'MSFT_texture_dds'
	};

	/**
	 * DDS Texture Extension
	 *
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/MSFT_texture_dds
	 *
	 */
	function GLTFTextureDDSExtension( ddsLoader ) {

		if ( ! ddsLoader ) {

			throw new Error( 'THREE.GLTFLoader: Attempting to load .dds texture without importing THREE.DDSLoader' );

		}

		this.name = EXTENSIONS.MSFT_TEXTURE_DDS;
		this.ddsLoader = ddsLoader;

	}

	/**
	 * Punctual Lights Extension
	 *
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_lights_punctual
	 */
	function GLTFLightsExtension( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.KHR_LIGHTS_PUNCTUAL;

		// Object3D instance caches
		this.cache = { refs: {}, uses: {} };

	}

	GLTFLightsExtension.prototype._markDefs = function () {

		var parser = this.parser;
		var nodeDefs = this.parser.json.nodes || [];

		for ( var nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex ++ ) {

			var nodeDef = nodeDefs[ nodeIndex ];

			if ( nodeDef.extensions
				&& nodeDef.extensions[ this.name ]
				&& nodeDef.extensions[ this.name ].light !== undefined ) {

				parser._addNodeRef( this.cache, nodeDef.extensions[ this.name ].light );

			}

		}

	};

	GLTFLightsExtension.prototype._loadLight = function ( lightIndex ) {

		var parser = this.parser;
		var cacheKey = 'light:' + lightIndex;
		var dependency = parser.cache.get( cacheKey );

		if ( dependency ) return dependency;

		var json = parser.json;
		var extensions = ( json.extensions && json.extensions[ this.name ] ) || {};
		var lightDefs = extensions.lights || [];
		var lightDef = lightDefs[ lightIndex ];
		var lightNode;

		var color = new THREE.Color( 0xffffff );

		if ( lightDef.color !== undefined ) color.fromArray( lightDef.color );

		var range = lightDef.range !== undefined ? lightDef.range : 0;

		switch ( lightDef.type ) {

			case 'directional':
				lightNode = new THREE.DirectionalLight( color );
				lightNode.target.position.set( 0, 0, - 1 );
				lightNode.add( lightNode.target );
				break;

			case 'point':
				lightNode = new THREE.PointLight( color );
				lightNode.distance = range;
				break;

			case 'spot':
				lightNode = new THREE.SpotLight( color );
				lightNode.distance = range;
				// Handle spotlight properties.
				lightDef.spot = lightDef.spot || {};
				lightDef.spot.innerConeAngle = lightDef.spot.innerConeAngle !== undefined ? lightDef.spot.innerConeAngle : 0;
				lightDef.spot.outerConeAngle = lightDef.spot.outerConeAngle !== undefined ? lightDef.spot.outerConeAngle : Math.PI / 4.0;
				lightNode.angle = lightDef.spot.outerConeAngle;
				lightNode.penumbra = 1.0 - lightDef.spot.innerConeAngle / lightDef.spot.outerConeAngle;
				lightNode.target.position.set( 0, 0, - 1 );
				lightNode.add( lightNode.target );
				break;

			default:
				throw new Error( 'THREE.GLTFLoader: Unexpected light type: ' + lightDef.type );

		}

		// Some lights (e.g. spot) default to a position other than the origin. Reset the position
		// here, because node-level parsing will only override position if explicitly specified.
		lightNode.position.set( 0, 0, 0 );

		lightNode.decay = 2;

		if ( lightDef.intensity !== undefined ) lightNode.intensity = lightDef.intensity;

		lightNode.name = parser.createUniqueName( lightDef.name || ( 'light_' + lightIndex ) );

		dependency = Promise.resolve( lightNode );

		parser.cache.add( cacheKey, dependency );

		return dependency;

	};

	GLTFLightsExtension.prototype.createNodeAttachment = function ( nodeIndex ) {

		var self = this;
		var parser = this.parser;
		var json = parser.json;
		var nodeDef = json.nodes[ nodeIndex ];
		var lightDef = ( nodeDef.extensions && nodeDef.extensions[ this.name ] ) || {};
		var lightIndex = lightDef.light;

		if ( lightIndex === undefined ) return null;

		return this._loadLight( lightIndex ).then( function ( light ) {

			return parser._getNodeRef( self.cache, lightIndex, light );

		} );

	};

	/**
	 * Unlit Materials Extension
	 *
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_unlit
	 */
	function GLTFMaterialsUnlitExtension() {

		this.name = EXTENSIONS.KHR_MATERIALS_UNLIT;

	}

	GLTFMaterialsUnlitExtension.prototype.getMaterialType = function () {

		return THREE.MeshBasicMaterial;

	};

	GLTFMaterialsUnlitExtension.prototype.extendParams = function ( materialParams, materialDef, parser ) {

		var pending = [];

		materialParams.color = new THREE.Color( 1.0, 1.0, 1.0 );
		materialParams.opacity = 1.0;

		var metallicRoughness = materialDef.pbrMetallicRoughness;

		if ( metallicRoughness ) {

			if ( Array.isArray( metallicRoughness.baseColorFactor ) ) {

				var array = metallicRoughness.baseColorFactor;

				materialParams.color.fromArray( array );
				materialParams.opacity = array[ 3 ];

			}

			if ( metallicRoughness.baseColorTexture !== undefined ) {

				pending.push( parser.assignTexture( materialParams, 'map', metallicRoughness.baseColorTexture ) );

			}

		}

		return Promise.all( pending );

	};

	/**
	 * Clearcoat Materials Extension
	 *
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_clearcoat
	 */
	function GLTFMaterialsClearcoatExtension( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.KHR_MATERIALS_CLEARCOAT;

	}

	GLTFMaterialsClearcoatExtension.prototype.getMaterialType = function ( materialIndex ) {

		var parser = this.parser;
		var materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;

		return THREE.MeshPhysicalMaterial;

	};

	GLTFMaterialsClearcoatExtension.prototype.extendMaterialParams = function ( materialIndex, materialParams ) {

		var parser = this.parser;
		var materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {

			return Promise.resolve();

		}

		var pending = [];

		var extension = materialDef.extensions[ this.name ];

		if ( extension.clearcoatFactor !== undefined ) {

			materialParams.clearcoat = extension.clearcoatFactor;

		}

		if ( extension.clearcoatTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'clearcoatMap', extension.clearcoatTexture ) );

		}

		if ( extension.clearcoatRoughnessFactor !== undefined ) {

			materialParams.clearcoatRoughness = extension.clearcoatRoughnessFactor;

		}

		if ( extension.clearcoatRoughnessTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'clearcoatRoughnessMap', extension.clearcoatRoughnessTexture ) );

		}

		if ( extension.clearcoatNormalTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'clearcoatNormalMap', extension.clearcoatNormalTexture ) );

			if ( extension.clearcoatNormalTexture.scale !== undefined ) {

				var scale = extension.clearcoatNormalTexture.scale;

				// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
				materialParams.clearcoatNormalScale = new THREE.Vector2( scale, -scale );

			}

		}

		return Promise.all( pending );

	};

	/**
	 * Transmission Materials Extension
	 *
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_transmission
	 * Draft: https://github.com/KhronosGroup/glTF/pull/1698
	 */
	function GLTFMaterialsTransmissionExtension( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.KHR_MATERIALS_TRANSMISSION;

	}

	GLTFMaterialsTransmissionExtension.prototype.getMaterialType = function ( materialIndex ) {

		var parser = this.parser;
		var materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;

		return THREE.MeshPhysicalMaterial;

	};

	GLTFMaterialsTransmissionExtension.prototype.extendMaterialParams = function ( materialIndex, materialParams ) {

		var parser = this.parser;
		var materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {

			return Promise.resolve();

		}

		var pending = [];

		var extension = materialDef.extensions[ this.name ];

		if ( extension.transmissionFactor !== undefined ) {

			materialParams.transmission = extension.transmissionFactor;

		}

		if ( extension.transmissionTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'transmissionMap', extension.transmissionTexture ) );

		}

		return Promise.all( pending );

	};

	/**
	 * BasisU Texture Extension
	 *
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_texture_basisu
	 */
	function GLTFTextureBasisUExtension( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.KHR_TEXTURE_BASISU;

	}

	GLTFTextureBasisUExtension.prototype.loadTexture = function ( textureIndex ) {

		var parser = this.parser;
		var json = parser.json;

		var textureDef = json.textures[ textureIndex ];

		if ( ! textureDef.extensions || ! textureDef.extensions[ this.name ] ) {

			return null;

		}

		var extension = textureDef.extensions[ this.name ];
		var source = json.images[ extension.source ];
		var loader = parser.options.ktx2Loader;

		if ( ! loader ) {

			if ( json.extensionsRequired && json.extensionsRequired.indexOf( this.name ) >= 0 ) {

				throw new Error( 'THREE.GLTFLoader: setKTX2Loader must be called before loading KTX2 textures' );

			} else {

				// Assumes that the extension is optional and that a fallback texture is present
				return null;

			}

		}

		return parser.loadTextureImage( textureIndex, source, loader );

	};

	/**
	 * WebP Texture Extension
	 *
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/EXT_texture_webp
	 */
	function GLTFTextureWebPExtension( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.EXT_TEXTURE_WEBP;
		this.isSupported = null;

	}

	GLTFTextureWebPExtension.prototype.loadTexture = function ( textureIndex ) {

		var name = this.name;
		var parser = this.parser;
		var json = parser.json;

		var textureDef = json.textures[ textureIndex ];

		if ( ! textureDef.extensions || ! textureDef.extensions[ name ] ) {

			return null;

		}

		var extension = textureDef.extensions[ name ];
		var source = json.images[ extension.source ];
		var loader = source.uri ? parser.options.manager.getHandler( source.uri ) : parser.textureLoader;

		return this.detectSupport().then( function ( isSupported ) {

			if ( isSupported ) return parser.loadTextureImage( textureIndex, source, loader );

			if ( json.extensionsRequired && json.extensionsRequired.indexOf( name ) >= 0 ) {

				throw new Error( 'THREE.GLTFLoader: WebP required by asset but unsupported.' );

			}

			// Fall back to PNG or JPEG.
			return parser.loadTexture( textureIndex );

		} );

	};

	GLTFTextureWebPExtension.prototype.detectSupport = function () {

		if ( ! this.isSupported ) {

			this.isSupported = new Promise( function ( resolve ) {

				var image = new Image();

				// Lossy test image. Support for lossy images doesn't guarantee support for all
				// WebP images, unfortunately.
				image.src = 'data:image/webp;base64,UklGRiIAAABXRUJQVlA4IBYAAAAwAQCdASoBAAEADsD+JaQAA3AAAAAA';

				image.onload = image.onerror = function () {

					resolve( image.height === 1 );

				};

			} );

		}

		return this.isSupported;

	};

	/**
	* meshopt BufferView Compression Extension
	*
	* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/EXT_meshopt_compression
	*/
	function GLTFMeshoptCompression( parser ) {

		this.name = EXTENSIONS.EXT_MESHOPT_COMPRESSION;
		this.parser = parser;

	}

	GLTFMeshoptCompression.prototype.loadBufferView = function ( index ) {

		var json = this.parser.json;
		var bufferView = json.bufferViews[ index ];

		if ( bufferView.extensions && bufferView.extensions[ this.name ] ) {

			var extensionDef = bufferView.extensions[ this.name ];

			var buffer = this.parser.getDependency( 'buffer', extensionDef.buffer );
			var decoder = this.parser.options.meshoptDecoder;

			if ( ! decoder || ! decoder.supported ) {

				if ( json.extensionsRequired && json.extensionsRequired.indexOf( this.name ) >= 0 ) {

					throw new Error( 'THREE.GLTFLoader: setMeshoptDecoder must be called before loading compressed files' );

				} else {

					// Assumes that the extension is optional and that fallback buffer data is present
					return null;

				}

			}

			return Promise.all( [ buffer, decoder.ready ] ).then( function ( res ) {

				var byteOffset = extensionDef.byteOffset || 0;
				var byteLength = extensionDef.byteLength || 0;

				var count = extensionDef.count;
				var stride = extensionDef.byteStride;

				var result = new ArrayBuffer( count * stride );
				var source = new Uint8Array( res[ 0 ], byteOffset, byteLength );

				decoder.decodeGltfBuffer( new Uint8Array( result ), count, stride, source, extensionDef.mode, extensionDef.filter );
				return result;

			} );

		} else {

			return null;

		}

	};

	/* BINARY EXTENSION */
	var BINARY_EXTENSION_HEADER_MAGIC = 'glTF';
	var BINARY_EXTENSION_HEADER_LENGTH = 12;
	var BINARY_EXTENSION_CHUNK_TYPES = { JSON: 0x4E4F534A, BIN: 0x004E4942 };

	function GLTFBinaryExtension( data ) {

		this.name = EXTENSIONS.KHR_BINARY_GLTF;
		this.content = null;
		this.body = null;

		var headerView = new DataView( data, 0, BINARY_EXTENSION_HEADER_LENGTH );

		this.header = {
			magic: THREE.LoaderUtils.decodeText( new Uint8Array( data.slice( 0, 4 ) ) ),
			version: headerView.getUint32( 4, true ),
			length: headerView.getUint32( 8, true )
		};

		if ( this.header.magic !== BINARY_EXTENSION_HEADER_MAGIC ) {

			throw new Error( 'THREE.GLTFLoader: Unsupported glTF-Binary header.' );

		} else if ( this.header.version < 2.0 ) {

			throw new Error( 'THREE.GLTFLoader: Legacy binary file detected.' );

		}

		var chunkContentsLength = this.header.length - BINARY_EXTENSION_HEADER_LENGTH;
		var chunkView = new DataView( data, BINARY_EXTENSION_HEADER_LENGTH );
		var chunkIndex = 0;

		while ( chunkIndex < chunkContentsLength ) {

			var chunkLength = chunkView.getUint32( chunkIndex, true );
			chunkIndex += 4;

			var chunkType = chunkView.getUint32( chunkIndex, true );
			chunkIndex += 4;

			if ( chunkType === BINARY_EXTENSION_CHUNK_TYPES.JSON ) {

				var contentArray = new Uint8Array( data, BINARY_EXTENSION_HEADER_LENGTH + chunkIndex, chunkLength );
				this.content = THREE.LoaderUtils.decodeText( contentArray );

			} else if ( chunkType === BINARY_EXTENSION_CHUNK_TYPES.BIN ) {

				var byteOffset = BINARY_EXTENSION_HEADER_LENGTH + chunkIndex;
				this.body = data.slice( byteOffset, byteOffset + chunkLength );

			}

			// Clients must ignore chunks with unknown types.

			chunkIndex += chunkLength;

		}

		if ( this.content === null ) {

			throw new Error( 'THREE.GLTFLoader: JSON content not found.' );

		}

	}

	/**
	 * DRACO Mesh Compression Extension
	 *
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_draco_mesh_compression
	 */
	function GLTFDracoMeshCompressionExtension( json, dracoLoader ) {

		if ( ! dracoLoader ) {

			throw new Error( 'THREE.GLTFLoader: No DRACOLoader instance provided.' );

		}

		this.name = EXTENSIONS.KHR_DRACO_MESH_COMPRESSION;
		this.json = json;
		this.dracoLoader = dracoLoader;
		this.dracoLoader.preload();

	}

	GLTFDracoMeshCompressionExtension.prototype.decodePrimitive = function ( primitive, parser ) {

		var json = this.json;
		var dracoLoader = this.dracoLoader;
		var bufferViewIndex = primitive.extensions[ this.name ].bufferView;
		var gltfAttributeMap = primitive.extensions[ this.name ].attributes;
		var threeAttributeMap = {};
		var attributeNormalizedMap = {};
		var attributeTypeMap = {};

		for ( var attributeName in gltfAttributeMap ) {

			var threeAttributeName = ATTRIBUTES[ attributeName ] || attributeName.toLowerCase();

			threeAttributeMap[ threeAttributeName ] = gltfAttributeMap[ attributeName ];

		}

		for ( attributeName in primitive.attributes ) {

			var threeAttributeName = ATTRIBUTES[ attributeName ] || attributeName.toLowerCase();

			if ( gltfAttributeMap[ attributeName ] !== undefined ) {

				var accessorDef = json.accessors[ primitive.attributes[ attributeName ] ];
				var componentType = WEBGL_COMPONENT_TYPES[ accessorDef.componentType ];

				attributeTypeMap[ threeAttributeName ] = componentType;
				attributeNormalizedMap[ threeAttributeName ] = accessorDef.normalized === true;

			}

		}

		return parser.getDependency( 'bufferView', bufferViewIndex ).then( function ( bufferView ) {

			return new Promise( function ( resolve ) {

				dracoLoader.decodeDracoFile( bufferView, function ( geometry ) {

					for ( var attributeName in geometry.attributes ) {

						var attribute = geometry.attributes[ attributeName ];
						var normalized = attributeNormalizedMap[ attributeName ];

						if ( normalized !== undefined ) attribute.normalized = normalized;

					}

					resolve( geometry );

				}, threeAttributeMap, attributeTypeMap );

			} );

		} );

	};

	/**
	 * Texture Transform Extension
	 *
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_texture_transform
	 */
	function GLTFTextureTransformExtension() {

		this.name = EXTENSIONS.KHR_TEXTURE_TRANSFORM;

	}

	GLTFTextureTransformExtension.prototype.extendTexture = function ( texture, transform ) {

		texture = texture.clone();

		if ( transform.offset !== undefined ) {

			texture.offset.fromArray( transform.offset );

		}

		if ( transform.rotation !== undefined ) {

			texture.rotation = transform.rotation;

		}

		if ( transform.scale !== undefined ) {

			texture.repeat.fromArray( transform.scale );

		}

		if ( transform.texCoord !== undefined ) {

			console.warn( 'THREE.GLTFLoader: Custom UV sets in "' + this.name + '" extension not yet supported.' );

		}

		texture.needsUpdate = true;

		return texture;

	};

	/**
	 * Specular-Glossiness Extension
	 *
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_pbrSpecularGlossiness
	 */

	/**
	 * A sub class of THREE.StandardMaterial with some of the functionality
	 * changed via the `onBeforeCompile` callback
	 * @pailhead
	 */

	function GLTFMeshStandardSGMaterial( params ) {

		THREE.MeshStandardMaterial.call( this );

		this.isGLTFSpecularGlossinessMaterial = true;

		//various chunks that need replacing
		var specularMapParsFragmentChunk = [
			'#ifdef USE_SPECULARMAP',
			'	uniform sampler2D specularMap;',
			'#endif'
		].join( '\n' );

		var glossinessMapParsFragmentChunk = [
			'#ifdef USE_GLOSSINESSMAP',
			'	uniform sampler2D glossinessMap;',
			'#endif'
		].join( '\n' );

		var specularMapFragmentChunk = [
			'vec3 specularFactor = specular;',
			'#ifdef USE_SPECULARMAP',
			'	vec4 texelSpecular = texture2D( specularMap, vUv );',
			'	texelSpecular = sRGBToLinear( texelSpecular );',
			'	// reads channel RGB, compatible with a glTF Specular-Glossiness (RGBA) texture',
			'	specularFactor *= texelSpecular.rgb;',
			'#endif'
		].join( '\n' );

		var glossinessMapFragmentChunk = [
			'float glossinessFactor = glossiness;',
			'#ifdef USE_GLOSSINESSMAP',
			'	vec4 texelGlossiness = texture2D( glossinessMap, vUv );',
			'	// reads channel A, compatible with a glTF Specular-Glossiness (RGBA) texture',
			'	glossinessFactor *= texelGlossiness.a;',
			'#endif'
		].join( '\n' );

		var lightPhysicalFragmentChunk = [
			'PhysicalMaterial material;',
			'material.diffuseColor = diffuseColor.rgb * ( 1. - max( specularFactor.r, max( specularFactor.g, specularFactor.b ) ) );',
			'vec3 dxy = max( abs( dFdx( geometryNormal ) ), abs( dFdy( geometryNormal ) ) );',
			'float geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );',
			'material.specularRoughness = max( 1.0 - glossinessFactor, 0.0525 ); // 0.0525 corresponds to the base mip of a 256 cubemap.',
			'material.specularRoughness += geometryRoughness;',
			'material.specularRoughness = min( material.specularRoughness, 1.0 );',
			'material.specularColor = specularFactor;',
		].join( '\n' );

		var uniforms = {
			specular: { value: new THREE.Color().setHex( 0xffffff ) },
			glossiness: { value: 1 },
			specularMap: { value: null },
			glossinessMap: { value: null }
		};

		this._extraUniforms = uniforms;

		this.onBeforeCompile = function ( shader ) {

			for ( var uniformName in uniforms ) {

				shader.uniforms[ uniformName ] = uniforms[ uniformName ];

			}

			shader.fragmentShader = shader.fragmentShader
				.replace( 'uniform float roughness;', 'uniform vec3 specular;' )
				.replace( 'uniform float metalness;', 'uniform float glossiness;' )
				.replace( '#include <roughnessmap_pars_fragment>', specularMapParsFragmentChunk )
				.replace( '#include <metalnessmap_pars_fragment>', glossinessMapParsFragmentChunk )
				.replace( '#include <roughnessmap_fragment>', specularMapFragmentChunk )
				.replace( '#include <metalnessmap_fragment>', glossinessMapFragmentChunk )
				.replace( '#include <lights_physical_fragment>', lightPhysicalFragmentChunk );

		};

		Object.defineProperties( this, {

			specular: {
				get: function () {

					return uniforms.specular.value;

				},
				set: function ( v ) {

					uniforms.specular.value = v;

				}
			},

			specularMap: {
				get: function () {

					return uniforms.specularMap.value;

				},
				set: function ( v ) {

					uniforms.specularMap.value = v;

					if ( v ) {

						this.defines.USE_SPECULARMAP = ''; // USE_UV is set by the renderer for specular maps

					} else {

						delete this.defines.USE_SPECULARMAP;

					}

				}
			},

			glossiness: {
				get: function () {

					return uniforms.glossiness.value;

				},
				set: function ( v ) {

					uniforms.glossiness.value = v;

				}
			},

			glossinessMap: {
				get: function () {

					return uniforms.glossinessMap.value;

				},
				set: function ( v ) {

					uniforms.glossinessMap.value = v;

					if ( v ) {

						this.defines.USE_GLOSSINESSMAP = '';
						this.defines.USE_UV = '';

					} else {

						delete this.defines.USE_GLOSSINESSMAP;
						delete this.defines.USE_UV;

					}

				}
			}

		} );

		delete this.metalness;
		delete this.roughness;
		delete this.metalnessMap;
		delete this.roughnessMap;

		this.setValues( params );

	}

	GLTFMeshStandardSGMaterial.prototype = Object.create( THREE.MeshStandardMaterial.prototype );
	GLTFMeshStandardSGMaterial.prototype.constructor = GLTFMeshStandardSGMaterial;

	GLTFMeshStandardSGMaterial.prototype.copy = function ( source ) {

		THREE.MeshStandardMaterial.prototype.copy.call( this, source );
		this.specularMap = source.specularMap;
		this.specular.copy( source.specular );
		this.glossinessMap = source.glossinessMap;
		this.glossiness = source.glossiness;
		delete this.metalness;
		delete this.roughness;
		delete this.metalnessMap;
		delete this.roughnessMap;
		return this;

	};

	function GLTFMaterialsPbrSpecularGlossinessExtension() {

		return {

			name: EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS,

			specularGlossinessParams: [
				'color',
				'map',
				'lightMap',
				'lightMapIntensity',
				'aoMap',
				'aoMapIntensity',
				'emissive',
				'emissiveIntensity',
				'emissiveMap',
				'bumpMap',
				'bumpScale',
				'normalMap',
				'normalMapType',
				'displacementMap',
				'displacementScale',
				'displacementBias',
				'specularMap',
				'specular',
				'glossinessMap',
				'glossiness',
				'alphaMap',
				'envMap',
				'envMapIntensity',
				'refractionRatio',
			],

			getMaterialType: function () {

				return GLTFMeshStandardSGMaterial;

			},

			extendParams: function ( materialParams, materialDef, parser ) {

				var pbrSpecularGlossiness = materialDef.extensions[ this.name ];

				materialParams.color = new THREE.Color( 1.0, 1.0, 1.0 );
				materialParams.opacity = 1.0;

				var pending = [];

				if ( Array.isArray( pbrSpecularGlossiness.diffuseFactor ) ) {

					var array = pbrSpecularGlossiness.diffuseFactor;

					materialParams.color.fromArray( array );
					materialParams.opacity = array[ 3 ];

				}

				if ( pbrSpecularGlossiness.diffuseTexture !== undefined ) {

					pending.push( parser.assignTexture( materialParams, 'map', pbrSpecularGlossiness.diffuseTexture ) );

				}

				materialParams.emissive = new THREE.Color( 0.0, 0.0, 0.0 );
				materialParams.glossiness = pbrSpecularGlossiness.glossinessFactor !== undefined ? pbrSpecularGlossiness.glossinessFactor : 1.0;
				materialParams.specular = new THREE.Color( 1.0, 1.0, 1.0 );

				if ( Array.isArray( pbrSpecularGlossiness.specularFactor ) ) {

					materialParams.specular.fromArray( pbrSpecularGlossiness.specularFactor );

				}

				if ( pbrSpecularGlossiness.specularGlossinessTexture !== undefined ) {

					var specGlossMapDef = pbrSpecularGlossiness.specularGlossinessTexture;
					pending.push( parser.assignTexture( materialParams, 'glossinessMap', specGlossMapDef ) );
					pending.push( parser.assignTexture( materialParams, 'specularMap', specGlossMapDef ) );

				}

				return Promise.all( pending );

			},

			createMaterial: function ( materialParams ) {

				var material = new GLTFMeshStandardSGMaterial( materialParams );
				material.fog = true;

				material.color = materialParams.color;

				material.map = materialParams.map === undefined ? null : materialParams.map;

				material.lightMap = null;
				material.lightMapIntensity = 1.0;

				material.aoMap = materialParams.aoMap === undefined ? null : materialParams.aoMap;
				material.aoMapIntensity = 1.0;

				material.emissive = materialParams.emissive;
				material.emissiveIntensity = 1.0;
				material.emissiveMap = materialParams.emissiveMap === undefined ? null : materialParams.emissiveMap;

				material.bumpMap = materialParams.bumpMap === undefined ? null : materialParams.bumpMap;
				material.bumpScale = 1;

				material.normalMap = materialParams.normalMap === undefined ? null : materialParams.normalMap;
				material.normalMapType = THREE.TangentSpaceNormalMap;

				if ( materialParams.normalScale ) material.normalScale = materialParams.normalScale;

				material.displacementMap = null;
				material.displacementScale = 1;
				material.displacementBias = 0;

				material.specularMap = materialParams.specularMap === undefined ? null : materialParams.specularMap;
				material.specular = materialParams.specular;

				material.glossinessMap = materialParams.glossinessMap === undefined ? null : materialParams.glossinessMap;
				material.glossiness = materialParams.glossiness;

				material.alphaMap = null;

				material.envMap = materialParams.envMap === undefined ? null : materialParams.envMap;
				material.envMapIntensity = 1.0;

				material.refractionRatio = 0.98;

				return material;

			},

		};

	}

	/**
	 * Mesh Quantization Extension
	 *
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_mesh_quantization
	 */
	function GLTFMeshQuantizationExtension() {

		this.name = EXTENSIONS.KHR_MESH_QUANTIZATION;

	}

	/*********************************/
	/********** INTERPOLATION ********/
	/*********************************/

	// Spline Interpolation
	// Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#appendix-c-spline-interpolation
	function GLTFCubicSplineInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {

		THREE.Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );

	}

	GLTFCubicSplineInterpolant.prototype = Object.create( THREE.Interpolant.prototype );
	GLTFCubicSplineInterpolant.prototype.constructor = GLTFCubicSplineInterpolant;

	GLTFCubicSplineInterpolant.prototype.copySampleValue_ = function ( index ) {

		// Copies a sample value to the result buffer. See description of glTF
		// CUBICSPLINE values layout in interpolate_() function below.

		var result = this.resultBuffer,
			values = this.sampleValues,
			valueSize = this.valueSize,
			offset = index * valueSize * 3 + valueSize;

		for ( var i = 0; i !== valueSize; i ++ ) {

			result[ i ] = values[ offset + i ];

		}

		return result;

	};

	GLTFCubicSplineInterpolant.prototype.beforeStart_ = GLTFCubicSplineInterpolant.prototype.copySampleValue_;

	GLTFCubicSplineInterpolant.prototype.afterEnd_ = GLTFCubicSplineInterpolant.prototype.copySampleValue_;

	GLTFCubicSplineInterpolant.prototype.interpolate_ = function ( i1, t0, t, t1 ) {

		var result = this.resultBuffer;
		var values = this.sampleValues;
		var stride = this.valueSize;

		var stride2 = stride * 2;
		var stride3 = stride * 3;

		var td = t1 - t0;

		var p = ( t - t0 ) / td;
		var pp = p * p;
		var ppp = pp * p;

		var offset1 = i1 * stride3;
		var offset0 = offset1 - stride3;

		var s2 = - 2 * ppp + 3 * pp;
		var s3 = ppp - pp;
		var s0 = 1 - s2;
		var s1 = s3 - pp + p;

		// Layout of keyframe output values for CUBICSPLINE animations:
		//   [ inTangent_1, splineVertex_1, outTangent_1, inTangent_2, splineVertex_2, ... ]
		for ( var i = 0; i !== stride; i ++ ) {

			var p0 = values[ offset0 + i + stride ]; // splineVertex_k
			var m0 = values[ offset0 + i + stride2 ] * td; // outTangent_k * (t_k+1 - t_k)
			var p1 = values[ offset1 + i + stride ]; // splineVertex_k+1
			var m1 = values[ offset1 + i ] * td; // inTangent_k+1 * (t_k+1 - t_k)

			result[ i ] = s0 * p0 + s1 * m0 + s2 * p1 + s3 * m1;

		}

		return result;

	};

	/*********************************/
	/********** INTERNALS ************/
	/*********************************/

	/* CONSTANTS */

	var WEBGL_CONSTANTS = {
		FLOAT: 5126,
		//FLOAT_MAT2: 35674,
		FLOAT_MAT3: 35675,
		FLOAT_MAT4: 35676,
		FLOAT_VEC2: 35664,
		FLOAT_VEC3: 35665,
		FLOAT_VEC4: 35666,
		LINEAR: 9729,
		REPEAT: 10497,
		SAMPLER_2D: 35678,
		POINTS: 0,
		LINES: 1,
		LINE_LOOP: 2,
		LINE_STRIP: 3,
		TRIANGLES: 4,
		TRIANGLE_STRIP: 5,
		TRIANGLE_FAN: 6,
		UNSIGNED_BYTE: 5121,
		UNSIGNED_SHORT: 5123
	};

	var WEBGL_COMPONENT_TYPES = {
		5120: Int8Array,
		5121: Uint8Array,
		5122: Int16Array,
		5123: Uint16Array,
		5125: Uint32Array,
		5126: Float32Array
	};

	var WEBGL_FILTERS = {
		9728: THREE.NearestFilter,
		9729: THREE.LinearFilter,
		9984: THREE.NearestMipmapNearestFilter,
		9985: THREE.LinearMipmapNearestFilter,
		9986: THREE.NearestMipmapLinearFilter,
		9987: THREE.LinearMipmapLinearFilter
	};

	var WEBGL_WRAPPINGS = {
		33071: THREE.ClampToEdgeWrapping,
		33648: THREE.MirroredRepeatWrapping,
		10497: THREE.RepeatWrapping
	};

	var WEBGL_TYPE_SIZES = {
		'SCALAR': 1,
		'VEC2': 2,
		'VEC3': 3,
		'VEC4': 4,
		'MAT2': 4,
		'MAT3': 9,
		'MAT4': 16
	};

	var ATTRIBUTES = {
		POSITION: 'position',
		NORMAL: 'normal',
		TANGENT: 'tangent',
		TEXCOORD_0: 'uv',
		TEXCOORD_1: 'uv2',
		COLOR_0: 'color',
		WEIGHTS_0: 'skinWeight',
		JOINTS_0: 'skinIndex',
	};

	var PATH_PROPERTIES = {
		scale: 'scale',
		translation: 'position',
		rotation: 'quaternion',
		weights: 'morphTargetInfluences'
	};

	var INTERPOLATION = {
		CUBICSPLINE: undefined, // We use a custom interpolant (GLTFCubicSplineInterpolation) for CUBICSPLINE tracks. Each
		                        // keyframe track will be initialized with a default interpolation type, then modified.
		LINEAR: THREE.InterpolateLinear,
		STEP: THREE.InterpolateDiscrete
	};

	var ALPHA_MODES = {
		OPAQUE: 'OPAQUE',
		MASK: 'MASK',
		BLEND: 'BLEND'
	};

	/* UTILITY FUNCTIONS */

	function resolveURL( url, path ) {

		// Invalid URL
		if ( typeof url !== 'string' || url === '' ) return '';

		// Host Relative URL
		if ( /^https?:\/\//i.test( path ) && /^\//.test( url ) ) {

			path = path.replace( /(^https?:\/\/[^\/]+).*/i, '$1' );

		}

		// Absolute URL http://,https://,//
		if ( /^(https?:)?\/\//i.test( url ) ) return url;

		// Data URI
		if ( /^data:.*,.*$/i.test( url ) ) return url;

		// Blob URL
		if ( /^blob:.*$/i.test( url ) ) return url;

		// Relative URL
		return path + url;

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#default-material
	 */
	function createDefaultMaterial( cache ) {

		if ( cache[ 'DefaultMaterial' ] === undefined ) {

			cache[ 'DefaultMaterial' ] = new THREE.MeshStandardMaterial( {
				color: 0xFFFFFF,
				emissive: 0x000000,
				metalness: 1,
				roughness: 1,
				transparent: false,
				depthTest: true,
				side: THREE.FrontSide
			} );

		}

		return cache[ 'DefaultMaterial' ];

	}

	function addUnknownExtensionsToUserData( knownExtensions, object, objectDef ) {

		// Add unknown glTF extensions to an object's userData.

		for ( var name in objectDef.extensions ) {

			if ( knownExtensions[ name ] === undefined ) {

				object.userData.gltfExtensions = object.userData.gltfExtensions || {};
				object.userData.gltfExtensions[ name ] = objectDef.extensions[ name ];

			}

		}

	}

	/**
	 * @param {THREE.Object3D|THREE.Material|THREE.BufferGeometry} object
	 * @param {GLTF.definition} gltfDef
	 */
	function assignExtrasToUserData( object, gltfDef ) {

		if ( gltfDef.extras !== undefined ) {

			if ( typeof gltfDef.extras === 'object' ) {

				Object.assign( object.userData, gltfDef.extras );

			} else {

				console.warn( 'THREE.GLTFLoader: Ignoring primitive type .extras, ' + gltfDef.extras );

			}

		}

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#morph-targets
	 *
	 * @param {THREE.BufferGeometry} geometry
	 * @param {Array<GLTF.Target>} targets
	 * @param {GLTFParser} parser
	 * @return {Promise<THREE.BufferGeometry>}
	 */
	function addMorphTargets( geometry, targets, parser ) {

		var hasMorphPosition = false;
		var hasMorphNormal = false;

		for ( var i = 0, il = targets.length; i < il; i ++ ) {

			var target = targets[ i ];

			if ( target.POSITION !== undefined ) hasMorphPosition = true;
			if ( target.NORMAL !== undefined ) hasMorphNormal = true;

			if ( hasMorphPosition && hasMorphNormal ) break;

		}

		if ( ! hasMorphPosition && ! hasMorphNormal ) return Promise.resolve( geometry );

		var pendingPositionAccessors = [];
		var pendingNormalAccessors = [];

		for ( var i = 0, il = targets.length; i < il; i ++ ) {

			var target = targets[ i ];

			if ( hasMorphPosition ) {

				var pendingAccessor = target.POSITION !== undefined
					? parser.getDependency( 'accessor', target.POSITION )
					: geometry.attributes.position;

				pendingPositionAccessors.push( pendingAccessor );

			}

			if ( hasMorphNormal ) {

				var pendingAccessor = target.NORMAL !== undefined
					? parser.getDependency( 'accessor', target.NORMAL )
					: geometry.attributes.normal;

				pendingNormalAccessors.push( pendingAccessor );

			}

		}

		return Promise.all( [
			Promise.all( pendingPositionAccessors ),
			Promise.all( pendingNormalAccessors )
		] ).then( function ( accessors ) {

			var morphPositions = accessors[ 0 ];
			var morphNormals = accessors[ 1 ];

			if ( hasMorphPosition ) geometry.morphAttributes.position = morphPositions;
			if ( hasMorphNormal ) geometry.morphAttributes.normal = morphNormals;
			geometry.morphTargetsRelative = true;

			return geometry;

		} );

	}

	/**
	 * @param {THREE.Mesh} mesh
	 * @param {GLTF.Mesh} meshDef
	 */
	function updateMorphTargets( mesh, meshDef ) {

		mesh.updateMorphTargets();

		if ( meshDef.weights !== undefined ) {

			for ( var i = 0, il = meshDef.weights.length; i < il; i ++ ) {

				mesh.morphTargetInfluences[ i ] = meshDef.weights[ i ];

			}

		}

		// .extras has user-defined data, so check that .extras.targetNames is an array.
		if ( meshDef.extras && Array.isArray( meshDef.extras.targetNames ) ) {

			var targetNames = meshDef.extras.targetNames;

			if ( mesh.morphTargetInfluences.length === targetNames.length ) {

				mesh.morphTargetDictionary = {};

				for ( var i = 0, il = targetNames.length; i < il; i ++ ) {

					mesh.morphTargetDictionary[ targetNames[ i ] ] = i;

				}

			} else {

				console.warn( 'THREE.GLTFLoader: Invalid extras.targetNames length. Ignoring names.' );

			}

		}

	}

	function createPrimitiveKey( primitiveDef ) {

		var dracoExtension = primitiveDef.extensions && primitiveDef.extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ];
		var geometryKey;

		if ( dracoExtension ) {

			geometryKey = 'draco:' + dracoExtension.bufferView
				+ ':' + dracoExtension.indices
				+ ':' + createAttributesKey( dracoExtension.attributes );

		} else {

			geometryKey = primitiveDef.indices + ':' + createAttributesKey( primitiveDef.attributes ) + ':' + primitiveDef.mode;

		}

		return geometryKey;

	}

	function createAttributesKey( attributes ) {

		var attributesKey = '';

		var keys = Object.keys( attributes ).sort();

		for ( var i = 0, il = keys.length; i < il; i ++ ) {

			attributesKey += keys[ i ] + ':' + attributes[ keys[ i ] ] + ';';

		}

		return attributesKey;

	}

	/* GLTF PARSER */

	function GLTFParser( json, options ) {

		this.json = json || {};
		this.extensions = {};
		this.plugins = {};
		this.options = options || {};

		// loader object cache
		this.cache = new GLTFRegistry();

		// associations between Three.js objects and glTF elements
		this.associations = new Map();

		// BufferGeometry caching
		this.primitiveCache = {};

		// Object3D instance caches
		this.meshCache = { refs: {}, uses: {} };
		this.cameraCache = { refs: {}, uses: {} };
		this.lightCache = { refs: {}, uses: {} };

		// Track node names, to ensure no duplicates
		this.nodeNamesUsed = {};

		// Use an ImageBitmapLoader if imageBitmaps are supported. Moves much of the
		// expensive work of uploading a texture to the GPU off the main thread.
		if ( typeof createImageBitmap !== 'undefined' && /Firefox/.test( navigator.userAgent ) === false ) {

			this.textureLoader = new THREE.ImageBitmapLoader( this.options.manager );

		} else {

			this.textureLoader = new THREE.TextureLoader( this.options.manager );

		}

		this.textureLoader.setCrossOrigin( this.options.crossOrigin );

		this.fileLoader = new THREE.FileLoader( this.options.manager );
		this.fileLoader.setResponseType( 'arraybuffer' );

		if ( this.options.crossOrigin === 'use-credentials' ) {

			this.fileLoader.setWithCredentials( true );

		}

	}

	GLTFParser.prototype.setExtensions = function ( extensions ) {

		this.extensions = extensions;

	};

	GLTFParser.prototype.setPlugins = function ( plugins ) {

		this.plugins = plugins;

	};

	GLTFParser.prototype.parse = function ( onLoad, onError ) {

		var parser = this;
		var json = this.json;
		var extensions = this.extensions;

		// Clear the loader cache
		this.cache.removeAll();

		// Mark the special nodes/meshes in json for efficient parse
		this._invokeAll( function ( ext ) {

			return ext._markDefs && ext._markDefs();

		} );

		Promise.all( [

			this.getDependencies( 'scene' ),
			this.getDependencies( 'animation' ),
			this.getDependencies( 'camera' ),

		] ).then( function ( dependencies ) {

			var result = {
				scene: dependencies[ 0 ][ json.scene || 0 ],
				scenes: dependencies[ 0 ],
				animations: dependencies[ 1 ],
				cameras: dependencies[ 2 ],
				asset: json.asset,
				parser: parser,
				userData: {}
			};

			addUnknownExtensionsToUserData( extensions, result, json );

			assignExtrasToUserData( result, json );

			onLoad( result );

		} ).catch( onError );

	};

	/**
	 * Marks the special nodes/meshes in json for efficient parse.
	 */
	GLTFParser.prototype._markDefs = function () {

		var nodeDefs = this.json.nodes || [];
		var skinDefs = this.json.skins || [];
		var meshDefs = this.json.meshes || [];

		// Nothing in the node definition indicates whether it is a Bone or an
		// Object3D. Use the skins' joint references to mark bones.
		for ( var skinIndex = 0, skinLength = skinDefs.length; skinIndex < skinLength; skinIndex ++ ) {

			var joints = skinDefs[ skinIndex ].joints;

			for ( var i = 0, il = joints.length; i < il; i ++ ) {

				nodeDefs[ joints[ i ] ].isBone = true;

			}

		}

		// Iterate over all nodes, marking references to shared resources,
		// as well as skeleton joints.
		for ( var nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex ++ ) {

			var nodeDef = nodeDefs[ nodeIndex ];

			if ( nodeDef.mesh !== undefined ) {

				this._addNodeRef( this.meshCache, nodeDef.mesh );

				// Nothing in the mesh definition indicates whether it is
				// a SkinnedMesh or Mesh. Use the node's mesh reference
				// to mark SkinnedMesh if node has skin.
				if ( nodeDef.skin !== undefined ) {

					meshDefs[ nodeDef.mesh ].isSkinnedMesh = true;

				}

			}

			if ( nodeDef.camera !== undefined ) {

				this._addNodeRef( this.cameraCache, nodeDef.camera );

			}

		}

	};

	/**
	 * Counts references to shared node / Object3D resources. These resources
	 * can be reused, or "instantiated", at multiple nodes in the scene
	 * hierarchy. Mesh, Camera, and Light instances are instantiated and must
	 * be marked. Non-scenegraph resources (like Materials, Geometries, and
	 * Textures) can be reused directly and are not marked here.
	 *
	 * Example: CesiumMilkTruck sample model reuses "Wheel" meshes.
	 */
	GLTFParser.prototype._addNodeRef = function ( cache, index ) {

		if ( index === undefined ) return;

		if ( cache.refs[ index ] === undefined ) {

			cache.refs[ index ] = cache.uses[ index ] = 0;

		}

		cache.refs[ index ] ++;

	};

	/** Returns a reference to a shared resource, cloning it if necessary. */
	GLTFParser.prototype._getNodeRef = function ( cache, index, object ) {

		if ( cache.refs[ index ] <= 1 ) return object;

		var ref = object.clone();

		ref.name += '_instance_' + ( cache.uses[ index ] ++ );

		return ref;

	};

	GLTFParser.prototype._invokeOne = function ( func ) {

		var extensions = Object.values( this.plugins );
		extensions.push( this );

		for ( var i = 0; i < extensions.length; i ++ ) {

			var result = func( extensions[ i ] );

			if ( result ) return result;

		}

	};

	GLTFParser.prototype._invokeAll = function ( func ) {

		var extensions = Object.values( this.plugins );
		extensions.unshift( this );

		var pending = [];

		for ( var i = 0; i < extensions.length; i ++ ) {

			var result = func( extensions[ i ] );

			if ( result ) pending.push( result );

		}

		return pending;

	};

	/**
	 * Requests the specified dependency asynchronously, with caching.
	 * @param {string} type
	 * @param {number} index
	 * @return {Promise<THREE.Object3D|THREE.Material|THREE.Texture|THREE.AnimationClip|ArrayBuffer|Object>}
	 */
	GLTFParser.prototype.getDependency = function ( type, index ) {

		var cacheKey = type + ':' + index;
		var dependency = this.cache.get( cacheKey );

		if ( ! dependency ) {

			switch ( type ) {

				case 'scene':
					dependency = this.loadScene( index );
					break;

				case 'node':
					dependency = this.loadNode( index );
					break;

				case 'mesh':
					dependency = this._invokeOne( function ( ext ) {

						return ext.loadMesh && ext.loadMesh( index );

					} );
					break;

				case 'accessor':
					dependency = this.loadAccessor( index );
					break;

				case 'bufferView':
					dependency = this._invokeOne( function ( ext ) {

						return ext.loadBufferView && ext.loadBufferView( index );

					} );
					break;

				case 'buffer':
					dependency = this.loadBuffer( index );
					break;

				case 'material':
					dependency = this._invokeOne( function ( ext ) {

						return ext.loadMaterial && ext.loadMaterial( index );

					} );
					break;

				case 'texture':
					dependency = this._invokeOne( function ( ext ) {

						return ext.loadTexture && ext.loadTexture( index );

					} );
					break;

				case 'skin':
					dependency = this.loadSkin( index );
					break;

				case 'animation':
					dependency = this.loadAnimation( index );
					break;

				case 'camera':
					dependency = this.loadCamera( index );
					break;

				default:
					throw new Error( 'Unknown type: ' + type );

			}

			this.cache.add( cacheKey, dependency );

		}

		return dependency;

	};

	/**
	 * Requests all dependencies of the specified type asynchronously, with caching.
	 * @param {string} type
	 * @return {Promise<Array<Object>>}
	 */
	GLTFParser.prototype.getDependencies = function ( type ) {

		var dependencies = this.cache.get( type );

		if ( ! dependencies ) {

			var parser = this;
			var defs = this.json[ type + ( type === 'mesh' ? 'es' : 's' ) ] || [];

			dependencies = Promise.all( defs.map( function ( def, index ) {

				return parser.getDependency( type, index );

			} ) );

			this.cache.add( type, dependencies );

		}

		return dependencies;

	};

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#buffers-and-buffer-views
	 * @param {number} bufferIndex
	 * @return {Promise<ArrayBuffer>}
	 */
	GLTFParser.prototype.loadBuffer = function ( bufferIndex ) {

		var bufferDef = this.json.buffers[ bufferIndex ];
		var loader = this.fileLoader;

		if ( bufferDef.type && bufferDef.type !== 'arraybuffer' ) {

			throw new Error( 'THREE.GLTFLoader: ' + bufferDef.type + ' buffer type is not supported.' );

		}

		// If present, GLB container is required to be the first buffer.
		if ( bufferDef.uri === undefined && bufferIndex === 0 ) {

			return Promise.resolve( this.extensions[ EXTENSIONS.KHR_BINARY_GLTF ].body );

		}

		var options = this.options;

		return new Promise( function ( resolve, reject ) {

			loader.load( resolveURL( bufferDef.uri, options.path ), resolve, undefined, function () {

				reject( new Error( 'THREE.GLTFLoader: Failed to load buffer "' + bufferDef.uri + '".' ) );

			} );

		} );

	};

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#buffers-and-buffer-views
	 * @param {number} bufferViewIndex
	 * @return {Promise<ArrayBuffer>}
	 */
	GLTFParser.prototype.loadBufferView = function ( bufferViewIndex ) {

		var bufferViewDef = this.json.bufferViews[ bufferViewIndex ];

		return this.getDependency( 'buffer', bufferViewDef.buffer ).then( function ( buffer ) {

			var byteLength = bufferViewDef.byteLength || 0;
			var byteOffset = bufferViewDef.byteOffset || 0;
			return buffer.slice( byteOffset, byteOffset + byteLength );

		} );

	};

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#accessors
	 * @param {number} accessorIndex
	 * @return {Promise<THREE.BufferAttribute|THREE.InterleavedBufferAttribute>}
	 */
	GLTFParser.prototype.loadAccessor = function ( accessorIndex ) {

		var parser = this;
		var json = this.json;

		var accessorDef = this.json.accessors[ accessorIndex ];

		if ( accessorDef.bufferView === undefined && accessorDef.sparse === undefined ) {

			// Ignore empty accessors, which may be used to declare runtime
			// information about attributes coming from another source (e.g. Draco
			// compression extension).
			return Promise.resolve( null );

		}

		var pendingBufferViews = [];

		if ( accessorDef.bufferView !== undefined ) {

			pendingBufferViews.push( this.getDependency( 'bufferView', accessorDef.bufferView ) );

		} else {

			pendingBufferViews.push( null );

		}

		if ( accessorDef.sparse !== undefined ) {

			pendingBufferViews.push( this.getDependency( 'bufferView', accessorDef.sparse.indices.bufferView ) );
			pendingBufferViews.push( this.getDependency( 'bufferView', accessorDef.sparse.values.bufferView ) );

		}

		return Promise.all( pendingBufferViews ).then( function ( bufferViews ) {

			var bufferView = bufferViews[ 0 ];

			var itemSize = WEBGL_TYPE_SIZES[ accessorDef.type ];
			var TypedArray = WEBGL_COMPONENT_TYPES[ accessorDef.componentType ];

			// For VEC3: itemSize is 3, elementBytes is 4, itemBytes is 12.
			var elementBytes = TypedArray.BYTES_PER_ELEMENT;
			var itemBytes = elementBytes * itemSize;
			var byteOffset = accessorDef.byteOffset || 0;
			var byteStride = accessorDef.bufferView !== undefined ? json.bufferViews[ accessorDef.bufferView ].byteStride : undefined;
			var normalized = accessorDef.normalized === true;
			var array, bufferAttribute;

			// The buffer is not interleaved if the stride is the item size in bytes.
			if ( byteStride && byteStride !== itemBytes ) {

				// Each "slice" of the buffer, as defined by 'count' elements of 'byteStride' bytes, gets its own InterleavedBuffer
				// This makes sure that IBA.count reflects accessor.count properly
				var ibSlice = Math.floor( byteOffset / byteStride );
				var ibCacheKey = 'InterleavedBuffer:' + accessorDef.bufferView + ':' + accessorDef.componentType + ':' + ibSlice + ':' + accessorDef.count;
				var ib = parser.cache.get( ibCacheKey );

				if ( ! ib ) {

					array = new TypedArray( bufferView, ibSlice * byteStride, accessorDef.count * byteStride / elementBytes );

					// Integer parameters to IB/IBA are in array elements, not bytes.
					ib = new THREE.InterleavedBuffer( array, byteStride / elementBytes );

					parser.cache.add( ibCacheKey, ib );

				}

				bufferAttribute = new THREE.InterleavedBufferAttribute( ib, itemSize, ( byteOffset % byteStride ) / elementBytes, normalized );

			} else {

				if ( bufferView === null ) {

					array = new TypedArray( accessorDef.count * itemSize );

				} else {

					array = new TypedArray( bufferView, byteOffset, accessorDef.count * itemSize );

				}

				bufferAttribute = new THREE.BufferAttribute( array, itemSize, normalized );

			}

			// https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#sparse-accessors
			if ( accessorDef.sparse !== undefined ) {

				var itemSizeIndices = WEBGL_TYPE_SIZES.SCALAR;
				var TypedArrayIndices = WEBGL_COMPONENT_TYPES[ accessorDef.sparse.indices.componentType ];

				var byteOffsetIndices = accessorDef.sparse.indices.byteOffset || 0;
				var byteOffsetValues = accessorDef.sparse.values.byteOffset || 0;

				var sparseIndices = new TypedArrayIndices( bufferViews[ 1 ], byteOffsetIndices, accessorDef.sparse.count * itemSizeIndices );
				var sparseValues = new TypedArray( bufferViews[ 2 ], byteOffsetValues, accessorDef.sparse.count * itemSize );

				if ( bufferView !== null ) {

					// Avoid modifying the original ArrayBuffer, if the bufferView wasn't initialized with zeroes.
					bufferAttribute = new THREE.BufferAttribute( bufferAttribute.array.slice(), bufferAttribute.itemSize, bufferAttribute.normalized );

				}

				for ( var i = 0, il = sparseIndices.length; i < il; i ++ ) {

					var index = sparseIndices[ i ];

					bufferAttribute.setX( index, sparseValues[ i * itemSize ] );
					if ( itemSize >= 2 ) bufferAttribute.setY( index, sparseValues[ i * itemSize + 1 ] );
					if ( itemSize >= 3 ) bufferAttribute.setZ( index, sparseValues[ i * itemSize + 2 ] );
					if ( itemSize >= 4 ) bufferAttribute.setW( index, sparseValues[ i * itemSize + 3 ] );
					if ( itemSize >= 5 ) throw new Error( 'THREE.GLTFLoader: Unsupported itemSize in sparse BufferAttribute.' );

				}

			}

			return bufferAttribute;

		} );

	};

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#textures
	 * @param {number} textureIndex
	 * @return {Promise<THREE.Texture>}
	 */
	GLTFParser.prototype.loadTexture = function ( textureIndex ) {

		var parser = this;
		var json = this.json;
		var options = this.options;

		var textureDef = json.textures[ textureIndex ];

		var textureExtensions = textureDef.extensions || {};

		var source;

		if ( textureExtensions[ EXTENSIONS.MSFT_TEXTURE_DDS ] ) {

			source = json.images[ textureExtensions[ EXTENSIONS.MSFT_TEXTURE_DDS ].source ];

		} else {

			source = json.images[ textureDef.source ];

		}

		var loader;

		if ( source.uri ) {

			loader = options.manager.getHandler( source.uri );

		}

		if ( ! loader ) {

			loader = textureExtensions[ EXTENSIONS.MSFT_TEXTURE_DDS ]
				? parser.extensions[ EXTENSIONS.MSFT_TEXTURE_DDS ].ddsLoader
				: this.textureLoader;

		}

		return this.loadTextureImage( textureIndex, source, loader );

	};

	GLTFParser.prototype.loadTextureImage = function ( textureIndex, source, loader ) {

		var parser = this;
		var json = this.json;
		var options = this.options;

		var textureDef = json.textures[ textureIndex ];

		var URL = self.URL || self.webkitURL;

		var sourceURI = source.uri;
		var isObjectURL = false;
		var hasAlpha = true;

		if ( source.mimeType === 'image/jpeg' ) hasAlpha = false;

		if ( source.bufferView !== undefined ) {

			// Load binary image data from bufferView, if provided.

			sourceURI = parser.getDependency( 'bufferView', source.bufferView ).then( function ( bufferView ) {

				if ( source.mimeType === 'image/png' ) {

					// Inspect the PNG 'IHDR' chunk to determine whether the image could have an
					// alpha channel. This check is conservative — the image could have an alpha
					// channel with all values == 1, and the indexed type (colorType == 3) only
					// sometimes contains alpha.
					//
					// https://en.wikipedia.org/wiki/Portable_Network_Graphics#File_header
					var colorType = new DataView( bufferView, 25, 1 ).getUint8( 0, false );
					hasAlpha = colorType === 6 || colorType === 4 || colorType === 3;

				}

				isObjectURL = true;
				var blob = new Blob( [ bufferView ], { type: source.mimeType } );
				sourceURI = URL.createObjectURL( blob );
				return sourceURI;

			} );

		}

		return Promise.resolve( sourceURI ).then( function ( sourceURI ) {

			return new Promise( function ( resolve, reject ) {

				var onLoad = resolve;

				if ( loader.isImageBitmapLoader === true ) {

					onLoad = function ( imageBitmap ) {

						resolve( new THREE.CanvasTexture( imageBitmap ) );

					};

				}

				loader.load( resolveURL( sourceURI, options.path ), onLoad, undefined, reject );

			} );

		} ).then( function ( texture ) {

			// Clean up resources and configure Texture.

			if ( isObjectURL === true ) {

				URL.revokeObjectURL( sourceURI );

			}

			texture.flipY = false;

			if ( textureDef.name ) texture.name = textureDef.name;

			// When there is definitely no alpha channel in the texture, set RGBFormat to save space.
			if ( ! hasAlpha ) texture.format = THREE.RGBFormat;

			var samplers = json.samplers || {};
			var sampler = samplers[ textureDef.sampler ] || {};

			texture.magFilter = WEBGL_FILTERS[ sampler.magFilter ] || THREE.LinearFilter;
			texture.minFilter = WEBGL_FILTERS[ sampler.minFilter ] || THREE.LinearMipmapLinearFilter;
			texture.wrapS = WEBGL_WRAPPINGS[ sampler.wrapS ] || THREE.RepeatWrapping;
			texture.wrapT = WEBGL_WRAPPINGS[ sampler.wrapT ] || THREE.RepeatWrapping;

			parser.associations.set( texture, {
				type: 'textures',
				index: textureIndex
			} );

			return texture;

		} );

	};

	/**
	 * Asynchronously assigns a texture to the given material parameters.
	 * @param {Object} materialParams
	 * @param {string} mapName
	 * @param {Object} mapDef
	 * @return {Promise}
	 */
	GLTFParser.prototype.assignTexture = function ( materialParams, mapName, mapDef ) {

		var parser = this;

		return this.getDependency( 'texture', mapDef.index ).then( function ( texture ) {

			// Materials sample aoMap from UV set 1 and other maps from UV set 0 - this can't be configured
			// However, we will copy UV set 0 to UV set 1 on demand for aoMap
			if ( mapDef.texCoord !== undefined && mapDef.texCoord != 0 && ! ( mapName === 'aoMap' && mapDef.texCoord == 1 ) ) {

				console.warn( 'THREE.GLTFLoader: Custom UV set ' + mapDef.texCoord + ' for texture ' + mapName + ' not yet supported.' );

			}

			if ( parser.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ] ) {

				var transform = mapDef.extensions !== undefined ? mapDef.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ] : undefined;

				if ( transform ) {

					var gltfReference = parser.associations.get( texture );
					texture = parser.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ].extendTexture( texture, transform );
					parser.associations.set( texture, gltfReference );

				}

			}

			materialParams[ mapName ] = texture;

		} );

	};

	/**
	 * Assigns final material to a Mesh, Line, or Points instance. The instance
	 * already has a material (generated from the glTF material options alone)
	 * but reuse of the same glTF material may require multiple threejs materials
	 * to accomodate different primitive types, defines, etc. New materials will
	 * be created if necessary, and reused from a cache.
	 * @param  {THREE.Object3D} mesh Mesh, Line, or Points instance.
	 */
	GLTFParser.prototype.assignFinalMaterial = function ( mesh ) {

		var geometry = mesh.geometry;
		var material = mesh.material;

		var useVertexTangents = geometry.attributes.tangent !== undefined;
		var useVertexColors = geometry.attributes.color !== undefined;
		var useFlatShading = geometry.attributes.normal === undefined;
		var useSkinning = mesh.isSkinnedMesh === true;
		var useMorphTargets = Object.keys( geometry.morphAttributes ).length > 0;
		var useMorphNormals = useMorphTargets && geometry.morphAttributes.normal !== undefined;

		if ( mesh.isPoints ) {

			var cacheKey = 'PointsMaterial:' + material.uuid;

			var pointsMaterial = this.cache.get( cacheKey );

			if ( ! pointsMaterial ) {

				pointsMaterial = new THREE.PointsMaterial();
				THREE.Material.prototype.copy.call( pointsMaterial, material );
				pointsMaterial.color.copy( material.color );
				pointsMaterial.map = material.map;
				pointsMaterial.sizeAttenuation = false; // glTF spec says points should be 1px

				this.cache.add( cacheKey, pointsMaterial );

			}

			material = pointsMaterial;

		} else if ( mesh.isLine ) {

			var cacheKey = 'LineBasicMaterial:' + material.uuid;

			var lineMaterial = this.cache.get( cacheKey );

			if ( ! lineMaterial ) {

				lineMaterial = new THREE.LineBasicMaterial();
				THREE.Material.prototype.copy.call( lineMaterial, material );
				lineMaterial.color.copy( material.color );

				this.cache.add( cacheKey, lineMaterial );

			}

			material = lineMaterial;

		}

		// Clone the material if it will be modified
		if ( useVertexTangents || useVertexColors || useFlatShading || useSkinning || useMorphTargets ) {

			var cacheKey = 'ClonedMaterial:' + material.uuid + ':';

			if ( material.isGLTFSpecularGlossinessMaterial ) cacheKey += 'specular-glossiness:';
			if ( useSkinning ) cacheKey += 'skinning:';
			if ( useVertexTangents ) cacheKey += 'vertex-tangents:';
			if ( useVertexColors ) cacheKey += 'vertex-colors:';
			if ( useFlatShading ) cacheKey += 'flat-shading:';
			if ( useMorphTargets ) cacheKey += 'morph-targets:';
			if ( useMorphNormals ) cacheKey += 'morph-normals:';

			var cachedMaterial = this.cache.get( cacheKey );

			if ( ! cachedMaterial ) {

				cachedMaterial = material.clone();

				if ( useSkinning ) cachedMaterial.skinning = true;
				if ( useVertexColors ) cachedMaterial.vertexColors = true;
				if ( useFlatShading ) cachedMaterial.flatShading = true;
				if ( useMorphTargets ) cachedMaterial.morphTargets = true;
				if ( useMorphNormals ) cachedMaterial.morphNormals = true;
				
				if ( useVertexTangents ) {

					cachedMaterial.vertexTangents = true;

					// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
					if ( material.normalScale ) material.normalScale.y *= -1;
					if ( material.clearcoatNormalScale ) material.clearcoatNormalScale.y *= -1;

				}

				this.cache.add( cacheKey, cachedMaterial );

				this.associations.set( cachedMaterial, this.associations.get( material ) );

			}

			material = cachedMaterial;

		}

		// workarounds for mesh and geometry

		if ( material.aoMap && geometry.attributes.uv2 === undefined && geometry.attributes.uv !== undefined ) {

			geometry.setAttribute( 'uv2', geometry.attributes.uv );

		}

		mesh.material = material;

	};

	GLTFParser.prototype.getMaterialType = function ( /* materialIndex */ ) {

		return THREE.MeshStandardMaterial;

	};

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#materials
	 * @param {number} materialIndex
	 * @return {Promise<THREE.Material>}
	 */
	GLTFParser.prototype.loadMaterial = function ( materialIndex ) {

		var parser = this;
		var json = this.json;
		var extensions = this.extensions;
		var materialDef = json.materials[ materialIndex ];

		var materialType;
		var materialParams = {};
		var materialExtensions = materialDef.extensions || {};

		var pending = [];

		if ( materialExtensions[ EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS ] ) {

			var sgExtension = extensions[ EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS ];
			materialType = sgExtension.getMaterialType();
			pending.push( sgExtension.extendParams( materialParams, materialDef, parser ) );

		} else if ( materialExtensions[ EXTENSIONS.KHR_MATERIALS_UNLIT ] ) {

			var kmuExtension = extensions[ EXTENSIONS.KHR_MATERIALS_UNLIT ];
			materialType = kmuExtension.getMaterialType();
			pending.push( kmuExtension.extendParams( materialParams, materialDef, parser ) );

		} else {

			// Specification:
			// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#metallic-roughness-material

			var metallicRoughness = materialDef.pbrMetallicRoughness || {};

			materialParams.color = new THREE.Color( 1.0, 1.0, 1.0 );
			materialParams.opacity = 1.0;

			if ( Array.isArray( metallicRoughness.baseColorFactor ) ) {

				var array = metallicRoughness.baseColorFactor;

				materialParams.color.fromArray( array );
				materialParams.opacity = array[ 3 ];

			}

			if ( metallicRoughness.baseColorTexture !== undefined ) {

				pending.push( parser.assignTexture( materialParams, 'map', metallicRoughness.baseColorTexture ) );

			}

			materialParams.metalness = metallicRoughness.metallicFactor !== undefined ? metallicRoughness.metallicFactor : 1.0;
			materialParams.roughness = metallicRoughness.roughnessFactor !== undefined ? metallicRoughness.roughnessFactor : 1.0;

			if ( metallicRoughness.metallicRoughnessTexture !== undefined ) {

				pending.push( parser.assignTexture( materialParams, 'metalnessMap', metallicRoughness.metallicRoughnessTexture ) );
				pending.push( parser.assignTexture( materialParams, 'roughnessMap', metallicRoughness.metallicRoughnessTexture ) );

			}

			materialType = this._invokeOne( function ( ext ) {

				return ext.getMaterialType && ext.getMaterialType( materialIndex );

			} );

			pending.push( Promise.all( this._invokeAll( function ( ext ) {

				return ext.extendMaterialParams && ext.extendMaterialParams( materialIndex, materialParams );

			} ) ) );

		}

		if ( materialDef.doubleSided === true ) {

			materialParams.side = THREE.DoubleSide;

		}

		var alphaMode = materialDef.alphaMode || ALPHA_MODES.OPAQUE;

		if ( alphaMode === ALPHA_MODES.BLEND ) {

			materialParams.transparent = true;

			// See: https://github.com/mrdoob/three.js/issues/17706
			materialParams.depthWrite = false;

		} else {

			materialParams.transparent = false;

			if ( alphaMode === ALPHA_MODES.MASK ) {

				materialParams.alphaTest = materialDef.alphaCutoff !== undefined ? materialDef.alphaCutoff : 0.5;

			}

		}

		if ( materialDef.normalTexture !== undefined && materialType !== THREE.MeshBasicMaterial ) {

			pending.push( parser.assignTexture( materialParams, 'normalMap', materialDef.normalTexture ) );

			// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
			materialParams.normalScale = new THREE.Vector2( 1, -1 );

			if ( materialDef.normalTexture.scale !== undefined ) {

				materialParams.normalScale.set( materialDef.normalTexture.scale, -materialDef.normalTexture.scale );

			}

		}

		if ( materialDef.occlusionTexture !== undefined && materialType !== THREE.MeshBasicMaterial ) {

			pending.push( parser.assignTexture( materialParams, 'aoMap', materialDef.occlusionTexture ) );

			if ( materialDef.occlusionTexture.strength !== undefined ) {

				materialParams.aoMapIntensity = materialDef.occlusionTexture.strength;

			}

		}

		if ( materialDef.emissiveFactor !== undefined && materialType !== THREE.MeshBasicMaterial ) {

			materialParams.emissive = new THREE.Color().fromArray( materialDef.emissiveFactor );

		}

		if ( materialDef.emissiveTexture !== undefined && materialType !== THREE.MeshBasicMaterial ) {

			pending.push( parser.assignTexture( materialParams, 'emissiveMap', materialDef.emissiveTexture ) );

		}

		return Promise.all( pending ).then( function () {

			var material;

			if ( materialType === GLTFMeshStandardSGMaterial ) {

				material = extensions[ EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS ].createMaterial( materialParams );

			} else {

				material = new materialType( materialParams );

			}

			if ( materialDef.name ) material.name = materialDef.name;

			// baseColorTexture, emissiveTexture, and specularGlossinessTexture use sRGB encoding.
			if ( material.map ) material.map.encoding = THREE.sRGBEncoding;
			if ( material.emissiveMap ) material.emissiveMap.encoding = THREE.sRGBEncoding;

			assignExtrasToUserData( material, materialDef );

			parser.associations.set( material, { type: 'materials', index: materialIndex } );

			if ( materialDef.extensions ) addUnknownExtensionsToUserData( extensions, material, materialDef );

			return material;

		} );

	};

	/** When Object3D instances are targeted by animation, they need unique names. */
	GLTFParser.prototype.createUniqueName = function ( originalName ) {

		var sanitizedName = THREE.PropertyBinding.sanitizeNodeName( originalName || '' );

		var name = sanitizedName;

		for ( var i = 1; this.nodeNamesUsed[ name ]; ++ i ) {

			name = sanitizedName + '_' + i;

		}

		this.nodeNamesUsed[ name ] = true;

		return name;

	};

	/**
	 * @param {THREE.BufferGeometry} geometry
	 * @param {GLTF.Primitive} primitiveDef
	 * @param {GLTFParser} parser
	 */
	function computeBounds( geometry, primitiveDef, parser ) {

		var attributes = primitiveDef.attributes;

		var box = new THREE.Box3();

		if ( attributes.POSITION !== undefined ) {

			var accessor = parser.json.accessors[ attributes.POSITION ];

			var min = accessor.min;
			var max = accessor.max;

			// glTF requires 'min' and 'max', but VRM (which extends glTF) currently ignores that requirement.

			if ( min !== undefined && max !== undefined ) {

				box.set(
					new THREE.Vector3( min[ 0 ], min[ 1 ], min[ 2 ] ),
					new THREE.Vector3( max[ 0 ], max[ 1 ], max[ 2 ] ) );

			} else {

				console.warn( 'THREE.GLTFLoader: Missing min/max properties for accessor POSITION.' );

				return;

			}

		} else {

			return;

		}

		var targets = primitiveDef.targets;

		if ( targets !== undefined ) {

			var maxDisplacement = new THREE.Vector3();
			var vector = new THREE.Vector3();

			for ( var i = 0, il = targets.length; i < il; i ++ ) {

				var target = targets[ i ];

				if ( target.POSITION !== undefined ) {

					var accessor = parser.json.accessors[ target.POSITION ];
					var min = accessor.min;
					var max = accessor.max;

					// glTF requires 'min' and 'max', but VRM (which extends glTF) currently ignores that requirement.

					if ( min !== undefined && max !== undefined ) {

						// we need to get max of absolute components because target weight is [-1,1]
						vector.setX( Math.max( Math.abs( min[ 0 ] ), Math.abs( max[ 0 ] ) ) );
						vector.setY( Math.max( Math.abs( min[ 1 ] ), Math.abs( max[ 1 ] ) ) );
						vector.setZ( Math.max( Math.abs( min[ 2 ] ), Math.abs( max[ 2 ] ) ) );

						// Note: this assumes that the sum of all weights is at most 1. This isn't quite correct - it's more conservative
						// to assume that each target can have a max weight of 1. However, for some use cases - notably, when morph targets
						// are used to implement key-frame animations and as such only two are active at a time - this results in very large
						// boxes. So for now we make a box that's sometimes a touch too small but is hopefully mostly of reasonable size.
						maxDisplacement.max( vector );

					} else {

						console.warn( 'THREE.GLTFLoader: Missing min/max properties for accessor POSITION.' );

					}

				}

			}

			// As per comment above this box isn't conservative, but has a reasonable size for a very large number of morph targets.
			box.expandByVector( maxDisplacement );

		}

		geometry.boundingBox = box;

		var sphere = new THREE.Sphere();

		box.getCenter( sphere.center );
		sphere.radius = box.min.distanceTo( box.max ) / 2;

		geometry.boundingSphere = sphere;

	}

	/**
	 * @param {THREE.BufferGeometry} geometry
	 * @param {GLTF.Primitive} primitiveDef
	 * @param {GLTFParser} parser
	 * @return {Promise<THREE.BufferGeometry>}
	 */
	function addPrimitiveAttributes( geometry, primitiveDef, parser ) {

		var attributes = primitiveDef.attributes;

		var pending = [];

		function assignAttributeAccessor( accessorIndex, attributeName ) {

			return parser.getDependency( 'accessor', accessorIndex )
				.then( function ( accessor ) {

					geometry.setAttribute( attributeName, accessor );

				} );

		}

		for ( var gltfAttributeName in attributes ) {

			var threeAttributeName = ATTRIBUTES[ gltfAttributeName ] || gltfAttributeName.toLowerCase();

			// Skip attributes already provided by e.g. Draco extension.
			if ( threeAttributeName in geometry.attributes ) continue;

			pending.push( assignAttributeAccessor( attributes[ gltfAttributeName ], threeAttributeName ) );

		}

		if ( primitiveDef.indices !== undefined && ! geometry.index ) {

			var accessor = parser.getDependency( 'accessor', primitiveDef.indices ).then( function ( accessor ) {

				geometry.setIndex( accessor );

			} );

			pending.push( accessor );

		}

		assignExtrasToUserData( geometry, primitiveDef );

		computeBounds( geometry, primitiveDef, parser );

		return Promise.all( pending ).then( function () {

			return primitiveDef.targets !== undefined
				? addMorphTargets( geometry, primitiveDef.targets, parser )
				: geometry;

		} );

	}

	/**
	 * @param {THREE.BufferGeometry} geometry
	 * @param {Number} drawMode
	 * @return {THREE.BufferGeometry}
	 */
	function toTrianglesDrawMode( geometry, drawMode ) {

		var index = geometry.getIndex();

		// generate index if not present

		if ( index === null ) {

			var indices = [];

			var position = geometry.getAttribute( 'position' );

			if ( position !== undefined ) {

				for ( var i = 0; i < position.count; i ++ ) {

					indices.push( i );

				}

				geometry.setIndex( indices );
				index = geometry.getIndex();

			} else {

				console.error( 'THREE.GLTFLoader.toTrianglesDrawMode(): Undefined position attribute. Processing not possible.' );
				return geometry;

			}

		}

		//

		var numberOfTriangles = index.count - 2;
		var newIndices = [];

		if ( drawMode === THREE.TriangleFanDrawMode ) {

			// gl.TRIANGLE_FAN

			for ( var i = 1; i <= numberOfTriangles; i ++ ) {

				newIndices.push( index.getX( 0 ) );
				newIndices.push( index.getX( i ) );
				newIndices.push( index.getX( i + 1 ) );

			}

		} else {

			// gl.TRIANGLE_STRIP

			for ( var i = 0; i < numberOfTriangles; i ++ ) {

				if ( i % 2 === 0 ) {

					newIndices.push( index.getX( i ) );
					newIndices.push( index.getX( i + 1 ) );
					newIndices.push( index.getX( i + 2 ) );


				} else {

					newIndices.push( index.getX( i + 2 ) );
					newIndices.push( index.getX( i + 1 ) );
					newIndices.push( index.getX( i ) );

				}

			}

		}

		if ( ( newIndices.length / 3 ) !== numberOfTriangles ) {

			console.error( 'THREE.GLTFLoader.toTrianglesDrawMode(): Unable to generate correct amount of triangles.' );

		}

		// build final geometry

		var newGeometry = geometry.clone();
		newGeometry.setIndex( newIndices );

		return newGeometry;

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#geometry
	 *
	 * Creates BufferGeometries from primitives.
	 *
	 * @param {Array<GLTF.Primitive>} primitives
	 * @return {Promise<Array<THREE.BufferGeometry>>}
	 */
	GLTFParser.prototype.loadGeometries = function ( primitives ) {

		var parser = this;
		var extensions = this.extensions;
		var cache = this.primitiveCache;

		function createDracoPrimitive( primitive ) {

			return extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ]
				.decodePrimitive( primitive, parser )
				.then( function ( geometry ) {

					return addPrimitiveAttributes( geometry, primitive, parser );

				} );

		}

		var pending = [];

		for ( var i = 0, il = primitives.length; i < il; i ++ ) {

			var primitive = primitives[ i ];
			var cacheKey = createPrimitiveKey( primitive );

			// See if we've already created this geometry
			var cached = cache[ cacheKey ];

			if ( cached ) {

				// Use the cached geometry if it exists
				pending.push( cached.promise );

			} else {

				var geometryPromise;

				if ( primitive.extensions && primitive.extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ] ) {

					// Use DRACO geometry if available
					geometryPromise = createDracoPrimitive( primitive );

				} else {

					// Otherwise create a new geometry
					geometryPromise = addPrimitiveAttributes( new THREE.BufferGeometry(), primitive, parser );

				}

				// Cache this geometry
				cache[ cacheKey ] = { primitive: primitive, promise: geometryPromise };

				pending.push( geometryPromise );

			}

		}

		return Promise.all( pending );

	};

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#meshes
	 * @param {number} meshIndex
	 * @return {Promise<THREE.Group|THREE.Mesh|THREE.SkinnedMesh>}
	 */
	GLTFParser.prototype.loadMesh = function ( meshIndex ) {

		var parser = this;
		var json = this.json;
		var extensions = this.extensions;

		var meshDef = json.meshes[ meshIndex ];
		var primitives = meshDef.primitives;

		var pending = [];

		for ( var i = 0, il = primitives.length; i < il; i ++ ) {

			var material = primitives[ i ].material === undefined
				? createDefaultMaterial( this.cache )
				: this.getDependency( 'material', primitives[ i ].material );

			pending.push( material );

		}

		pending.push( parser.loadGeometries( primitives ) );

		return Promise.all( pending ).then( function ( results ) {

			var materials = results.slice( 0, results.length - 1 );
			var geometries = results[ results.length - 1 ];

			var meshes = [];

			for ( var i = 0, il = geometries.length; i < il; i ++ ) {

				var geometry = geometries[ i ];
				var primitive = primitives[ i ];

				// 1. create Mesh

				var mesh;

				var material = materials[ i ];

				if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLES ||
					primitive.mode === WEBGL_CONSTANTS.TRIANGLE_STRIP ||
					primitive.mode === WEBGL_CONSTANTS.TRIANGLE_FAN ||
					primitive.mode === undefined ) {

					// .isSkinnedMesh isn't in glTF spec. See ._markDefs()
					mesh = meshDef.isSkinnedMesh === true
						? new THREE.SkinnedMesh( geometry, material )
						: new THREE.Mesh( geometry, material );

					// Fix double sided rendered models on certain mobile devices, see https://github.com/mrdoob/three.js/issues/20997#issuecomment-756082184

					if ( material.isMeshStandardMaterial === true &&
						material.side === THREE.DoubleSide &&
						geometry.getIndex() !== null &&
						geometry.hasAttribute( 'position' ) === true &&
						geometry.hasAttribute( 'normal' ) === true &&
						geometry.hasAttribute( 'uv' ) === true &&
						geometry.hasAttribute( 'tangent' ) === false ) {

						geometry.computeTangents();
						material.vertexTangents = true;

					}

					if ( mesh.isSkinnedMesh === true && ! mesh.geometry.attributes.skinWeight.normalized ) {

						// we normalize floating point skin weight array to fix malformed assets (see #15319)
						// it's important to skip this for non-float32 data since normalizeSkinWeights assumes non-normalized inputs
						mesh.normalizeSkinWeights();

					}

					if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLE_STRIP ) {

						mesh.geometry = toTrianglesDrawMode( mesh.geometry, THREE.TriangleStripDrawMode );

					} else if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLE_FAN ) {

						mesh.geometry = toTrianglesDrawMode( mesh.geometry, THREE.TriangleFanDrawMode );

					}

				} else if ( primitive.mode === WEBGL_CONSTANTS.LINES ) {

					mesh = new THREE.LineSegments( geometry, material );

				} else if ( primitive.mode === WEBGL_CONSTANTS.LINE_STRIP ) {

					mesh = new THREE.Line( geometry, material );

				} else if ( primitive.mode === WEBGL_CONSTANTS.LINE_LOOP ) {

					mesh = new THREE.LineLoop( geometry, material );

				} else if ( primitive.mode === WEBGL_CONSTANTS.POINTS ) {

					mesh = new THREE.Points( geometry, material );

				} else {

					throw new Error( 'THREE.GLTFLoader: Primitive mode unsupported: ' + primitive.mode );

				}

				if ( Object.keys( mesh.geometry.morphAttributes ).length > 0 ) {

					updateMorphTargets( mesh, meshDef );

				}

				mesh.name = parser.createUniqueName( meshDef.name || ( 'mesh_' + meshIndex ) );

				assignExtrasToUserData( mesh, meshDef );

				if ( primitive.extensions ) addUnknownExtensionsToUserData( extensions, mesh, primitive );

				parser.assignFinalMaterial( mesh );

				meshes.push( mesh );

			}

			if ( meshes.length === 1 ) {

				return meshes[ 0 ];

			}

			var group = new THREE.Group();

			for ( var i = 0, il = meshes.length; i < il; i ++ ) {

				group.add( meshes[ i ] );

			}

			return group;

		} );

	};

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#cameras
	 * @param {number} cameraIndex
	 * @return {Promise<THREE.Camera>}
	 */
	GLTFParser.prototype.loadCamera = function ( cameraIndex ) {

		var camera;
		var cameraDef = this.json.cameras[ cameraIndex ];
		var params = cameraDef[ cameraDef.type ];

		if ( ! params ) {

			console.warn( 'THREE.GLTFLoader: Missing camera parameters.' );
			return;

		}

		if ( cameraDef.type === 'perspective' ) {

			camera = new THREE.PerspectiveCamera( THREE.MathUtils.radToDeg( params.yfov ), params.aspectRatio || 1, params.znear || 1, params.zfar || 2e6 );

		} else if ( cameraDef.type === 'orthographic' ) {

			camera = new THREE.OrthographicCamera( - params.xmag, params.xmag, params.ymag, - params.ymag, params.znear, params.zfar );

		}

		if ( cameraDef.name ) camera.name = this.createUniqueName( cameraDef.name );

		assignExtrasToUserData( camera, cameraDef );

		return Promise.resolve( camera );

	};

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#skins
	 * @param {number} skinIndex
	 * @return {Promise<Object>}
	 */
	GLTFParser.prototype.loadSkin = function ( skinIndex ) {

		var skinDef = this.json.skins[ skinIndex ];

		var skinEntry = { joints: skinDef.joints };

		if ( skinDef.inverseBindMatrices === undefined ) {

			return Promise.resolve( skinEntry );

		}

		return this.getDependency( 'accessor', skinDef.inverseBindMatrices ).then( function ( accessor ) {

			skinEntry.inverseBindMatrices = accessor;

			return skinEntry;

		} );

	};

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#animations
	 * @param {number} animationIndex
	 * @return {Promise<THREE.AnimationClip>}
	 */
	GLTFParser.prototype.loadAnimation = function ( animationIndex ) {

		var json = this.json;

		var animationDef = json.animations[ animationIndex ];

		var pendingNodes = [];
		var pendingInputAccessors = [];
		var pendingOutputAccessors = [];
		var pendingSamplers = [];
		var pendingTargets = [];

		for ( var i = 0, il = animationDef.channels.length; i < il; i ++ ) {

			var channel = animationDef.channels[ i ];
			var sampler = animationDef.samplers[ channel.sampler ];
			var target = channel.target;
			var name = target.node !== undefined ? target.node : target.id; // NOTE: target.id is deprecated.
			var input = animationDef.parameters !== undefined ? animationDef.parameters[ sampler.input ] : sampler.input;
			var output = animationDef.parameters !== undefined ? animationDef.parameters[ sampler.output ] : sampler.output;

			pendingNodes.push( this.getDependency( 'node', name ) );
			pendingInputAccessors.push( this.getDependency( 'accessor', input ) );
			pendingOutputAccessors.push( this.getDependency( 'accessor', output ) );
			pendingSamplers.push( sampler );
			pendingTargets.push( target );

		}

		return Promise.all( [

			Promise.all( pendingNodes ),
			Promise.all( pendingInputAccessors ),
			Promise.all( pendingOutputAccessors ),
			Promise.all( pendingSamplers ),
			Promise.all( pendingTargets )

		] ).then( function ( dependencies ) {

			var nodes = dependencies[ 0 ];
			var inputAccessors = dependencies[ 1 ];
			var outputAccessors = dependencies[ 2 ];
			var samplers = dependencies[ 3 ];
			var targets = dependencies[ 4 ];

			var tracks = [];

			for ( var i = 0, il = nodes.length; i < il; i ++ ) {

				var node = nodes[ i ];
				var inputAccessor = inputAccessors[ i ];
				var outputAccessor = outputAccessors[ i ];
				var sampler = samplers[ i ];
				var target = targets[ i ];

				if ( node === undefined ) continue;

				node.updateMatrix();
				node.matrixAutoUpdate = true;

				var TypedKeyframeTrack;

				switch ( PATH_PROPERTIES[ target.path ] ) {

					case PATH_PROPERTIES.weights:

						TypedKeyframeTrack = THREE.NumberKeyframeTrack;
						break;

					case PATH_PROPERTIES.rotation:

						TypedKeyframeTrack = THREE.QuaternionKeyframeTrack;
						break;

					case PATH_PROPERTIES.position:
					case PATH_PROPERTIES.scale:
					default:

						TypedKeyframeTrack = THREE.VectorKeyframeTrack;
						break;

				}

				var targetName = node.name ? node.name : node.uuid;

				var interpolation = sampler.interpolation !== undefined ? INTERPOLATION[ sampler.interpolation ] : THREE.InterpolateLinear;

				var targetNames = [];

				if ( PATH_PROPERTIES[ target.path ] === PATH_PROPERTIES.weights ) {

					// Node may be a THREE.Group (glTF mesh with several primitives) or a THREE.Mesh.
					node.traverse( function ( object ) {

						if ( object.isMesh === true && object.morphTargetInfluences ) {

							targetNames.push( object.name ? object.name : object.uuid );

						}

					} );

				} else {

					targetNames.push( targetName );

				}

				var outputArray = outputAccessor.array;

				if ( outputAccessor.normalized ) {

					var scale;

					if ( outputArray.constructor === Int8Array ) {

						scale = 1 / 127;

					} else if ( outputArray.constructor === Uint8Array ) {

						scale = 1 / 255;

					} else if ( outputArray.constructor == Int16Array ) {

						scale = 1 / 32767;

					} else if ( outputArray.constructor === Uint16Array ) {

						scale = 1 / 65535;

					} else {

						throw new Error( 'THREE.GLTFLoader: Unsupported output accessor component type.' );

					}

					var scaled = new Float32Array( outputArray.length );

					for ( var j = 0, jl = outputArray.length; j < jl; j ++ ) {

						scaled[ j ] = outputArray[ j ] * scale;

					}

					outputArray = scaled;

				}

				for ( var j = 0, jl = targetNames.length; j < jl; j ++ ) {

					var track = new TypedKeyframeTrack(
						targetNames[ j ] + '.' + PATH_PROPERTIES[ target.path ],
						inputAccessor.array,
						outputArray,
						interpolation
					);

					// Override interpolation with custom factory method.
					if ( sampler.interpolation === 'CUBICSPLINE' ) {

						track.createInterpolant = function InterpolantFactoryMethodGLTFCubicSpline( result ) {

							// A CUBICSPLINE keyframe in glTF has three output values for each input value,
							// representing inTangent, splineVertex, and outTangent. As a result, track.getValueSize()
							// must be divided by three to get the interpolant's sampleSize argument.

							return new GLTFCubicSplineInterpolant( this.times, this.values, this.getValueSize() / 3, result );

						};

						// Mark as CUBICSPLINE. `track.getInterpolation()` doesn't support custom interpolants.
						track.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline = true;

					}

					tracks.push( track );

				}

			}

			var name = animationDef.name ? animationDef.name : 'animation_' + animationIndex;

			return new THREE.AnimationClip( name, undefined, tracks );

		} );

	};

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#nodes-and-hierarchy
	 * @param {number} nodeIndex
	 * @return {Promise<THREE.Object3D>}
	 */
	GLTFParser.prototype.loadNode = function ( nodeIndex ) {

		var json = this.json;
		var extensions = this.extensions;
		var parser = this;

		var nodeDef = json.nodes[ nodeIndex ];

		// reserve node's name before its dependencies, so the root has the intended name.
		var nodeName = nodeDef.name ? parser.createUniqueName( nodeDef.name ) : '';

		return ( function () {

			var pending = [];

			if ( nodeDef.mesh !== undefined ) {

				pending.push( parser.getDependency( 'mesh', nodeDef.mesh ).then( function ( mesh ) {

					var node = parser._getNodeRef( parser.meshCache, nodeDef.mesh, mesh );

					// if weights are provided on the node, override weights on the mesh.
					if ( nodeDef.weights !== undefined ) {

						node.traverse( function ( o ) {

							if ( ! o.isMesh ) return;

							for ( var i = 0, il = nodeDef.weights.length; i < il; i ++ ) {

								o.morphTargetInfluences[ i ] = nodeDef.weights[ i ];

							}

						} );

					}

					return node;

				} ) );

			}

			if ( nodeDef.camera !== undefined ) {

				pending.push( parser.getDependency( 'camera', nodeDef.camera ).then( function ( camera ) {

					return parser._getNodeRef( parser.cameraCache, nodeDef.camera, camera );

				} ) );

			}

			parser._invokeAll( function ( ext ) {

				return ext.createNodeAttachment && ext.createNodeAttachment( nodeIndex );

			} ).forEach( function ( promise ) {

				pending.push( promise );

			} );

			return Promise.all( pending );

		}() ).then( function ( objects ) {

			var node;

			// .isBone isn't in glTF spec. See ._markDefs
			if ( nodeDef.isBone === true ) {

				node = new THREE.Bone();

			} else if ( objects.length > 1 ) {

				node = new THREE.Group();

			} else if ( objects.length === 1 ) {

				node = objects[ 0 ];

			} else {

				node = new THREE.Object3D();

			}

			if ( node !== objects[ 0 ] ) {

				for ( var i = 0, il = objects.length; i < il; i ++ ) {

					node.add( objects[ i ] );

				}

			}

			if ( nodeDef.name ) {

				node.userData.name = nodeDef.name;
				node.name = nodeName;

			}

			assignExtrasToUserData( node, nodeDef );

			if ( nodeDef.extensions ) addUnknownExtensionsToUserData( extensions, node, nodeDef );

			if ( nodeDef.matrix !== undefined ) {

				var matrix = new THREE.Matrix4();
				matrix.fromArray( nodeDef.matrix );
				node.applyMatrix4( matrix );

			} else {

				if ( nodeDef.translation !== undefined ) {

					node.position.fromArray( nodeDef.translation );

				}

				if ( nodeDef.rotation !== undefined ) {

					node.quaternion.fromArray( nodeDef.rotation );

				}

				if ( nodeDef.scale !== undefined ) {

					node.scale.fromArray( nodeDef.scale );

				}

			}

			parser.associations.set( node, { type: 'nodes', index: nodeIndex } );

			return node;

		} );

	};

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#scenes
	 * @param {number} sceneIndex
	 * @return {Promise<THREE.Group>}
	 */
	GLTFParser.prototype.loadScene = function () {

		// scene node hierachy builder

		function buildNodeHierachy( nodeId, parentObject, json, parser ) {

			var nodeDef = json.nodes[ nodeId ];

			return parser.getDependency( 'node', nodeId ).then( function ( node ) {

				if ( nodeDef.skin === undefined ) return node;

				// build skeleton here as well

				var skinEntry;

				return parser.getDependency( 'skin', nodeDef.skin ).then( function ( skin ) {

					skinEntry = skin;

					var pendingJoints = [];

					for ( var i = 0, il = skinEntry.joints.length; i < il; i ++ ) {

						pendingJoints.push( parser.getDependency( 'node', skinEntry.joints[ i ] ) );

					}

					return Promise.all( pendingJoints );

				} ).then( function ( jointNodes ) {

					node.traverse( function ( mesh ) {

						if ( ! mesh.isMesh ) return;

						var bones = [];
						var boneInverses = [];

						for ( var j = 0, jl = jointNodes.length; j < jl; j ++ ) {

							var jointNode = jointNodes[ j ];

							if ( jointNode ) {

								bones.push( jointNode );

								var mat = new THREE.Matrix4();

								if ( skinEntry.inverseBindMatrices !== undefined ) {

									mat.fromArray( skinEntry.inverseBindMatrices.array, j * 16 );

								}

								boneInverses.push( mat );

							} else {

								console.warn( 'THREE.GLTFLoader: Joint "%s" could not be found.', skinEntry.joints[ j ] );

							}

						}

						mesh.bind( new THREE.Skeleton( bones, boneInverses ), mesh.matrixWorld );

					} );

					return node;

				} );

			} ).then( function ( node ) {

				// build node hierachy

				parentObject.add( node );

				var pending = [];

				if ( nodeDef.children ) {

					var children = nodeDef.children;

					for ( var i = 0, il = children.length; i < il; i ++ ) {

						var child = children[ i ];
						pending.push( buildNodeHierachy( child, node, json, parser ) );

					}

				}

				return Promise.all( pending );

			} );

		}

		return function loadScene( sceneIndex ) {

			var json = this.json;
			var extensions = this.extensions;
			var sceneDef = this.json.scenes[ sceneIndex ];
			var parser = this;

			// Loader returns Group, not Scene.
			// See: https://github.com/mrdoob/three.js/issues/18342#issuecomment-578981172
			var scene = new THREE.Group();
			if ( sceneDef.name ) scene.name = parser.createUniqueName( sceneDef.name );

			assignExtrasToUserData( scene, sceneDef );

			if ( sceneDef.extensions ) addUnknownExtensionsToUserData( extensions, scene, sceneDef );

			var nodeIds = sceneDef.nodes || [];

			var pending = [];

			for ( var i = 0, il = nodeIds.length; i < il; i ++ ) {

				pending.push( buildNodeHierachy( nodeIds[ i ], scene, json, parser ) );

			}

			return Promise.all( pending ).then( function () {

				return scene;

			} );

		};

	}();

	return GLTFLoader;

} )();

},{}],40:[function(_dereq_,module,exports){
/**
 * Loads a Wavefront .mtl file specifying materials
 */

THREE.MTLLoader = function ( manager ) {

	THREE.Loader.call( this, manager );

};

THREE.MTLLoader.prototype = Object.assign( Object.create( THREE.Loader.prototype ), {

	constructor: THREE.MTLLoader,

	/**
	 * Loads and parses a MTL asset from a URL.
	 *
	 * @param {String} url - URL to the MTL file.
	 * @param {Function} [onLoad] - Callback invoked with the loaded object.
	 * @param {Function} [onProgress] - Callback for download progress.
	 * @param {Function} [onError] - Callback for download errors.
	 *
	 * @see setPath setResourcePath
	 *
	 * @note In order for relative texture references to resolve correctly
	 * you must call setResourcePath() explicitly prior to load.
	 */
	load: function ( url, onLoad, onProgress, onError ) {

		var scope = this;

		var path = ( this.path === '' ) ? THREE.LoaderUtils.extractUrlBase( url ) : this.path;

		var loader = new THREE.FileLoader( this.manager );
		loader.setPath( this.path );
		loader.setRequestHeader( this.requestHeader );
		loader.setWithCredentials( this.withCredentials );
		loader.load( url, function ( text ) {

			try {

				onLoad( scope.parse( text, path ) );

			} catch ( e ) {

				if ( onError ) {

					onError( e );

				} else {

					console.error( e );

				}

				scope.manager.itemError( url );

			}

		}, onProgress, onError );

	},

	setMaterialOptions: function ( value ) {

		this.materialOptions = value;
		return this;

	},

	/**
	 * Parses a MTL file.
	 *
	 * @param {String} text - Content of MTL file
	 * @return {THREE.MTLLoader.MaterialCreator}
	 *
	 * @see setPath setResourcePath
	 *
	 * @note In order for relative texture references to resolve correctly
	 * you must call setResourcePath() explicitly prior to parse.
	 */
	parse: function ( text, path ) {

		var lines = text.split( '\n' );
		var info = {};
		var delimiter_pattern = /\s+/;
		var materialsInfo = {};

		for ( var i = 0; i < lines.length; i ++ ) {

			var line = lines[ i ];
			line = line.trim();

			if ( line.length === 0 || line.charAt( 0 ) === '#' ) {

				// Blank line or comment ignore
				continue;

			}

			var pos = line.indexOf( ' ' );

			var key = ( pos >= 0 ) ? line.substring( 0, pos ) : line;
			key = key.toLowerCase();

			var value = ( pos >= 0 ) ? line.substring( pos + 1 ) : '';
			value = value.trim();

			if ( key === 'newmtl' ) {

				// New material

				info = { name: value };
				materialsInfo[ value ] = info;

			} else {

				if ( key === 'ka' || key === 'kd' || key === 'ks' || key === 'ke' ) {

					var ss = value.split( delimiter_pattern, 3 );
					info[ key ] = [ parseFloat( ss[ 0 ] ), parseFloat( ss[ 1 ] ), parseFloat( ss[ 2 ] ) ];

				} else {

					info[ key ] = value;

				}

			}

		}

		var materialCreator = new THREE.MTLLoader.MaterialCreator( this.resourcePath || path, this.materialOptions );
		materialCreator.setCrossOrigin( this.crossOrigin );
		materialCreator.setManager( this.manager );
		materialCreator.setMaterials( materialsInfo );
		return materialCreator;

	}

} );

/**
 * Create a new THREE.MTLLoader.MaterialCreator
 * @param baseUrl - Url relative to which textures are loaded
 * @param options - Set of options on how to construct the materials
 *                  side: Which side to apply the material
 *                        THREE.FrontSide (default), THREE.BackSide, THREE.DoubleSide
 *                  wrap: What type of wrapping to apply for textures
 *                        THREE.RepeatWrapping (default), THREE.ClampToEdgeWrapping, THREE.MirroredRepeatWrapping
 *                  normalizeRGB: RGBs need to be normalized to 0-1 from 0-255
 *                                Default: false, assumed to be already normalized
 *                  ignoreZeroRGBs: Ignore values of RGBs (Ka,Kd,Ks) that are all 0's
 *                                  Default: false
 * @constructor
 */

THREE.MTLLoader.MaterialCreator = function ( baseUrl, options ) {

	this.baseUrl = baseUrl || '';
	this.options = options;
	this.materialsInfo = {};
	this.materials = {};
	this.materialsArray = [];
	this.nameLookup = {};

	this.side = ( this.options && this.options.side ) ? this.options.side : THREE.FrontSide;
	this.wrap = ( this.options && this.options.wrap ) ? this.options.wrap : THREE.RepeatWrapping;

};

THREE.MTLLoader.MaterialCreator.prototype = {

	constructor: THREE.MTLLoader.MaterialCreator,

	crossOrigin: 'anonymous',

	setCrossOrigin: function ( value ) {

		this.crossOrigin = value;
		return this;

	},

	setManager: function ( value ) {

		this.manager = value;

	},

	setMaterials: function ( materialsInfo ) {

		this.materialsInfo = this.convert( materialsInfo );
		this.materials = {};
		this.materialsArray = [];
		this.nameLookup = {};

	},

	convert: function ( materialsInfo ) {

		if ( ! this.options ) return materialsInfo;

		var converted = {};

		for ( var mn in materialsInfo ) {

			// Convert materials info into normalized form based on options

			var mat = materialsInfo[ mn ];

			var covmat = {};

			converted[ mn ] = covmat;

			for ( var prop in mat ) {

				var save = true;
				var value = mat[ prop ];
				var lprop = prop.toLowerCase();

				switch ( lprop ) {

					case 'kd':
					case 'ka':
					case 'ks':

						// Diffuse color (color under white light) using RGB values

						if ( this.options && this.options.normalizeRGB ) {

							value = [ value[ 0 ] / 255, value[ 1 ] / 255, value[ 2 ] / 255 ];

						}

						if ( this.options && this.options.ignoreZeroRGBs ) {

							if ( value[ 0 ] === 0 && value[ 1 ] === 0 && value[ 2 ] === 0 ) {

								// ignore

								save = false;

							}

						}

						break;

					default:

						break;

				}

				if ( save ) {

					covmat[ lprop ] = value;

				}

			}

		}

		return converted;

	},

	preload: function () {

		for ( var mn in this.materialsInfo ) {

			this.create( mn );

		}

	},

	getIndex: function ( materialName ) {

		return this.nameLookup[ materialName ];

	},

	getAsArray: function () {

		var index = 0;

		for ( var mn in this.materialsInfo ) {

			this.materialsArray[ index ] = this.create( mn );
			this.nameLookup[ mn ] = index;
			index ++;

		}

		return this.materialsArray;

	},

	create: function ( materialName ) {

		if ( this.materials[ materialName ] === undefined ) {

			this.createMaterial_( materialName );

		}

		return this.materials[ materialName ];

	},

	createMaterial_: function ( materialName ) {

		// Create material

		var scope = this;
		var mat = this.materialsInfo[ materialName ];
		var params = {

			name: materialName,
			side: this.side

		};

		function resolveURL( baseUrl, url ) {

			if ( typeof url !== 'string' || url === '' )
				return '';

			// Absolute URL
			if ( /^https?:\/\//i.test( url ) ) return url;

			return baseUrl + url;

		}

		function setMapForType( mapType, value ) {

			if ( params[ mapType ] ) return; // Keep the first encountered texture

			var texParams = scope.getTextureParams( value, params );
			var map = scope.loadTexture( resolveURL( scope.baseUrl, texParams.url ) );

			map.repeat.copy( texParams.scale );
			map.offset.copy( texParams.offset );

			map.wrapS = scope.wrap;
			map.wrapT = scope.wrap;

			params[ mapType ] = map;

		}

		for ( var prop in mat ) {

			var value = mat[ prop ];
			var n;

			if ( value === '' ) continue;

			switch ( prop.toLowerCase() ) {

				// Ns is material specular exponent

				case 'kd':

					// Diffuse color (color under white light) using RGB values

					params.color = new THREE.Color().fromArray( value );

					break;

				case 'ks':

					// Specular color (color when light is reflected from shiny surface) using RGB values
					params.specular = new THREE.Color().fromArray( value );

					break;

				case 'ke':

					// Emissive using RGB values
					params.emissive = new THREE.Color().fromArray( value );

					break;

				case 'map_kd':

					// Diffuse texture map

					setMapForType( 'map', value );

					break;

				case 'map_ks':

					// Specular map

					setMapForType( 'specularMap', value );

					break;

				case 'map_ke':

					// Emissive map

					setMapForType( 'emissiveMap', value );

					break;

				case 'norm':

					setMapForType( 'normalMap', value );

					break;

				case 'map_bump':
				case 'bump':

					// Bump texture map

					setMapForType( 'bumpMap', value );

					break;

				case 'map_d':

					// Alpha map

					setMapForType( 'alphaMap', value );
					params.transparent = true;

					break;

				case 'ns':

					// The specular exponent (defines the focus of the specular highlight)
					// A high exponent results in a tight, concentrated highlight. Ns values normally range from 0 to 1000.

					params.shininess = parseFloat( value );

					break;

				case 'd':
					n = parseFloat( value );

					if ( n < 1 ) {

						params.opacity = n;
						params.transparent = true;

					}

					break;

				case 'tr':
					n = parseFloat( value );

					if ( this.options && this.options.invertTrProperty ) n = 1 - n;

					if ( n > 0 ) {

						params.opacity = 1 - n;
						params.transparent = true;

					}

					break;

				default:
					break;

			}

		}

		this.materials[ materialName ] = new THREE.MeshPhongMaterial( params );
		return this.materials[ materialName ];

	},

	getTextureParams: function ( value, matParams ) {

		var texParams = {

			scale: new THREE.Vector2( 1, 1 ),
			offset: new THREE.Vector2( 0, 0 )

		 };

		var items = value.split( /\s+/ );
		var pos;

		pos = items.indexOf( '-bm' );

		if ( pos >= 0 ) {

			matParams.bumpScale = parseFloat( items[ pos + 1 ] );
			items.splice( pos, 2 );

		}

		pos = items.indexOf( '-s' );

		if ( pos >= 0 ) {

			texParams.scale.set( parseFloat( items[ pos + 1 ] ), parseFloat( items[ pos + 2 ] ) );
			items.splice( pos, 4 ); // we expect 3 parameters here!

		}

		pos = items.indexOf( '-o' );

		if ( pos >= 0 ) {

			texParams.offset.set( parseFloat( items[ pos + 1 ] ), parseFloat( items[ pos + 2 ] ) );
			items.splice( pos, 4 ); // we expect 3 parameters here!

		}

		texParams.url = items.join( ' ' ).trim();
		return texParams;

	},

	loadTexture: function ( url, mapping, onLoad, onProgress, onError ) {

		var texture;
		var manager = ( this.manager !== undefined ) ? this.manager : THREE.DefaultLoadingManager;
		var loader = manager.getHandler( url );

		if ( loader === null ) {

			loader = new THREE.TextureLoader( manager );

		}

		if ( loader.setCrossOrigin ) loader.setCrossOrigin( this.crossOrigin );
		texture = loader.load( url, onLoad, onProgress, onError );

		if ( mapping !== undefined ) texture.mapping = mapping;

		return texture;

	}

};

},{}],41:[function(_dereq_,module,exports){
THREE.OBJLoader = ( function () {

	// o object_name | g group_name
	var object_pattern = /^[og]\s*(.+)?/;
	// mtllib file_reference
	var material_library_pattern = /^mtllib /;
	// usemtl material_name
	var material_use_pattern = /^usemtl /;
	// usemap map_name
	var map_use_pattern = /^usemap /;

	var vA = new THREE.Vector3();
	var vB = new THREE.Vector3();
	var vC = new THREE.Vector3();

	var ab = new THREE.Vector3();
	var cb = new THREE.Vector3();

	function ParserState() {

		var state = {
			objects: [],
			object: {},

			vertices: [],
			normals: [],
			colors: [],
			uvs: [],

			materials: {},
			materialLibraries: [],

			startObject: function ( name, fromDeclaration ) {

				// If the current object (initial from reset) is not from a g/o declaration in the parsed
				// file. We need to use it for the first parsed g/o to keep things in sync.
				if ( this.object && this.object.fromDeclaration === false ) {

					this.object.name = name;
					this.object.fromDeclaration = ( fromDeclaration !== false );
					return;

				}

				var previousMaterial = ( this.object && typeof this.object.currentMaterial === 'function' ? this.object.currentMaterial() : undefined );

				if ( this.object && typeof this.object._finalize === 'function' ) {

					this.object._finalize( true );

				}

				this.object = {
					name: name || '',
					fromDeclaration: ( fromDeclaration !== false ),

					geometry: {
						vertices: [],
						normals: [],
						colors: [],
						uvs: [],
						hasUVIndices: false
					},
					materials: [],
					smooth: true,

					startMaterial: function ( name, libraries ) {

						var previous = this._finalize( false );

						// New usemtl declaration overwrites an inherited material, except if faces were declared
						// after the material, then it must be preserved for proper MultiMaterial continuation.
						if ( previous && ( previous.inherited || previous.groupCount <= 0 ) ) {

							this.materials.splice( previous.index, 1 );

						}

						var material = {
							index: this.materials.length,
							name: name || '',
							mtllib: ( Array.isArray( libraries ) && libraries.length > 0 ? libraries[ libraries.length - 1 ] : '' ),
							smooth: ( previous !== undefined ? previous.smooth : this.smooth ),
							groupStart: ( previous !== undefined ? previous.groupEnd : 0 ),
							groupEnd: - 1,
							groupCount: - 1,
							inherited: false,

							clone: function ( index ) {

								var cloned = {
									index: ( typeof index === 'number' ? index : this.index ),
									name: this.name,
									mtllib: this.mtllib,
									smooth: this.smooth,
									groupStart: 0,
									groupEnd: - 1,
									groupCount: - 1,
									inherited: false
								};
								cloned.clone = this.clone.bind( cloned );
								return cloned;

							}
						};

						this.materials.push( material );

						return material;

					},

					currentMaterial: function () {

						if ( this.materials.length > 0 ) {

							return this.materials[ this.materials.length - 1 ];

						}

						return undefined;

					},

					_finalize: function ( end ) {

						var lastMultiMaterial = this.currentMaterial();
						if ( lastMultiMaterial && lastMultiMaterial.groupEnd === - 1 ) {

							lastMultiMaterial.groupEnd = this.geometry.vertices.length / 3;
							lastMultiMaterial.groupCount = lastMultiMaterial.groupEnd - lastMultiMaterial.groupStart;
							lastMultiMaterial.inherited = false;

						}

						// Ignore objects tail materials if no face declarations followed them before a new o/g started.
						if ( end && this.materials.length > 1 ) {

							for ( var mi = this.materials.length - 1; mi >= 0; mi -- ) {

								if ( this.materials[ mi ].groupCount <= 0 ) {

									this.materials.splice( mi, 1 );

								}

							}

						}

						// Guarantee at least one empty material, this makes the creation later more straight forward.
						if ( end && this.materials.length === 0 ) {

							this.materials.push( {
								name: '',
								smooth: this.smooth
							} );

						}

						return lastMultiMaterial;

					}
				};

				// Inherit previous objects material.
				// Spec tells us that a declared material must be set to all objects until a new material is declared.
				// If a usemtl declaration is encountered while this new object is being parsed, it will
				// overwrite the inherited material. Exception being that there was already face declarations
				// to the inherited material, then it will be preserved for proper MultiMaterial continuation.

				if ( previousMaterial && previousMaterial.name && typeof previousMaterial.clone === 'function' ) {

					var declared = previousMaterial.clone( 0 );
					declared.inherited = true;
					this.object.materials.push( declared );

				}

				this.objects.push( this.object );

			},

			finalize: function () {

				if ( this.object && typeof this.object._finalize === 'function' ) {

					this.object._finalize( true );

				}

			},

			parseVertexIndex: function ( value, len ) {

				var index = parseInt( value, 10 );
				return ( index >= 0 ? index - 1 : index + len / 3 ) * 3;

			},

			parseNormalIndex: function ( value, len ) {

				var index = parseInt( value, 10 );
				return ( index >= 0 ? index - 1 : index + len / 3 ) * 3;

			},

			parseUVIndex: function ( value, len ) {

				var index = parseInt( value, 10 );
				return ( index >= 0 ? index - 1 : index + len / 2 ) * 2;

			},

			addVertex: function ( a, b, c ) {

				var src = this.vertices;
				var dst = this.object.geometry.vertices;

				dst.push( src[ a + 0 ], src[ a + 1 ], src[ a + 2 ] );
				dst.push( src[ b + 0 ], src[ b + 1 ], src[ b + 2 ] );
				dst.push( src[ c + 0 ], src[ c + 1 ], src[ c + 2 ] );

			},

			addVertexPoint: function ( a ) {

				var src = this.vertices;
				var dst = this.object.geometry.vertices;

				dst.push( src[ a + 0 ], src[ a + 1 ], src[ a + 2 ] );

			},

			addVertexLine: function ( a ) {

				var src = this.vertices;
				var dst = this.object.geometry.vertices;

				dst.push( src[ a + 0 ], src[ a + 1 ], src[ a + 2 ] );

			},

			addNormal: function ( a, b, c ) {

				var src = this.normals;
				var dst = this.object.geometry.normals;

				dst.push( src[ a + 0 ], src[ a + 1 ], src[ a + 2 ] );
				dst.push( src[ b + 0 ], src[ b + 1 ], src[ b + 2 ] );
				dst.push( src[ c + 0 ], src[ c + 1 ], src[ c + 2 ] );

			},

			addFaceNormal: function ( a, b, c ) {

				var src = this.vertices;
				var dst = this.object.geometry.normals;

				vA.fromArray( src, a );
				vB.fromArray( src, b );
				vC.fromArray( src, c );

				cb.subVectors( vC, vB );
				ab.subVectors( vA, vB );
				cb.cross( ab );

				cb.normalize();

				dst.push( cb.x, cb.y, cb.z );
				dst.push( cb.x, cb.y, cb.z );
				dst.push( cb.x, cb.y, cb.z );

			},

			addColor: function ( a, b, c ) {

				var src = this.colors;
				var dst = this.object.geometry.colors;

				if ( src[ a ] !== undefined ) dst.push( src[ a + 0 ], src[ a + 1 ], src[ a + 2 ] );
				if ( src[ b ] !== undefined ) dst.push( src[ b + 0 ], src[ b + 1 ], src[ b + 2 ] );
				if ( src[ c ] !== undefined ) dst.push( src[ c + 0 ], src[ c + 1 ], src[ c + 2 ] );

			},

			addUV: function ( a, b, c ) {

				var src = this.uvs;
				var dst = this.object.geometry.uvs;

				dst.push( src[ a + 0 ], src[ a + 1 ] );
				dst.push( src[ b + 0 ], src[ b + 1 ] );
				dst.push( src[ c + 0 ], src[ c + 1 ] );

			},

			addDefaultUV: function () {

				var dst = this.object.geometry.uvs;

				dst.push( 0, 0 );
				dst.push( 0, 0 );
				dst.push( 0, 0 );

			},

			addUVLine: function ( a ) {

				var src = this.uvs;
				var dst = this.object.geometry.uvs;

				dst.push( src[ a + 0 ], src[ a + 1 ] );

			},

			addFace: function ( a, b, c, ua, ub, uc, na, nb, nc ) {

				var vLen = this.vertices.length;

				var ia = this.parseVertexIndex( a, vLen );
				var ib = this.parseVertexIndex( b, vLen );
				var ic = this.parseVertexIndex( c, vLen );

				this.addVertex( ia, ib, ic );
				this.addColor( ia, ib, ic );

				// normals

				if ( na !== undefined && na !== '' ) {

					var nLen = this.normals.length;

					ia = this.parseNormalIndex( na, nLen );
					ib = this.parseNormalIndex( nb, nLen );
					ic = this.parseNormalIndex( nc, nLen );

					this.addNormal( ia, ib, ic );

				} else {

					this.addFaceNormal( ia, ib, ic );

				}

				// uvs

				if ( ua !== undefined && ua !== '' ) {

					var uvLen = this.uvs.length;

					ia = this.parseUVIndex( ua, uvLen );
					ib = this.parseUVIndex( ub, uvLen );
					ic = this.parseUVIndex( uc, uvLen );

					this.addUV( ia, ib, ic );

					this.object.geometry.hasUVIndices = true;

				} else {

					// add placeholder values (for inconsistent face definitions)

					this.addDefaultUV();

				}

			},

			addPointGeometry: function ( vertices ) {

				this.object.geometry.type = 'Points';

				var vLen = this.vertices.length;

				for ( var vi = 0, l = vertices.length; vi < l; vi ++ ) {

					var index = this.parseVertexIndex( vertices[ vi ], vLen );

					this.addVertexPoint( index );
					this.addColor( index );

				}

			},

			addLineGeometry: function ( vertices, uvs ) {

				this.object.geometry.type = 'Line';

				var vLen = this.vertices.length;
				var uvLen = this.uvs.length;

				for ( var vi = 0, l = vertices.length; vi < l; vi ++ ) {

					this.addVertexLine( this.parseVertexIndex( vertices[ vi ], vLen ) );

				}

				for ( var uvi = 0, l = uvs.length; uvi < l; uvi ++ ) {

					this.addUVLine( this.parseUVIndex( uvs[ uvi ], uvLen ) );

				}

			}

		};

		state.startObject( '', false );

		return state;

	}

	//

	function OBJLoader( manager ) {

		THREE.Loader.call( this, manager );

		this.materials = null;

	}

	OBJLoader.prototype = Object.assign( Object.create( THREE.Loader.prototype ), {

		constructor: OBJLoader,

		load: function ( url, onLoad, onProgress, onError ) {

			var scope = this;

			var loader = new THREE.FileLoader( this.manager );
			loader.setPath( this.path );
			loader.setRequestHeader( this.requestHeader );
			loader.setWithCredentials( this.withCredentials );
			loader.load( url, function ( text ) {

				try {

					onLoad( scope.parse( text ) );

				} catch ( e ) {

					if ( onError ) {

						onError( e );

					} else {

						console.error( e );

					}

					scope.manager.itemError( url );

				}

			}, onProgress, onError );

		},

		setMaterials: function ( materials ) {

			this.materials = materials;

			return this;

		},

		parse: function ( text ) {

			var state = new ParserState();

			if ( text.indexOf( '\r\n' ) !== - 1 ) {

				// This is faster than String.split with regex that splits on both
				text = text.replace( /\r\n/g, '\n' );

			}

			if ( text.indexOf( '\\\n' ) !== - 1 ) {

				// join lines separated by a line continuation character (\)
				text = text.replace( /\\\n/g, '' );

			}

			var lines = text.split( '\n' );
			var line = '', lineFirstChar = '';
			var lineLength = 0;
			var result = [];

			// Faster to just trim left side of the line. Use if available.
			var trimLeft = ( typeof ''.trimLeft === 'function' );

			for ( var i = 0, l = lines.length; i < l; i ++ ) {

				line = lines[ i ];

				line = trimLeft ? line.trimLeft() : line.trim();

				lineLength = line.length;

				if ( lineLength === 0 ) continue;

				lineFirstChar = line.charAt( 0 );

				// @todo invoke passed in handler if any
				if ( lineFirstChar === '#' ) continue;

				if ( lineFirstChar === 'v' ) {

					var data = line.split( /\s+/ );

					switch ( data[ 0 ] ) {

						case 'v':
							state.vertices.push(
								parseFloat( data[ 1 ] ),
								parseFloat( data[ 2 ] ),
								parseFloat( data[ 3 ] )
							);
							if ( data.length >= 7 ) {

								state.colors.push(
									parseFloat( data[ 4 ] ),
									parseFloat( data[ 5 ] ),
									parseFloat( data[ 6 ] )

								);

							} else {

								// if no colors are defined, add placeholders so color and vertex indices match

								state.colors.push( undefined, undefined, undefined );

							}

							break;
						case 'vn':
							state.normals.push(
								parseFloat( data[ 1 ] ),
								parseFloat( data[ 2 ] ),
								parseFloat( data[ 3 ] )
							);
							break;
						case 'vt':
							state.uvs.push(
								parseFloat( data[ 1 ] ),
								parseFloat( data[ 2 ] )
							);
							break;

					}

				} else if ( lineFirstChar === 'f' ) {

					var lineData = line.substr( 1 ).trim();
					var vertexData = lineData.split( /\s+/ );
					var faceVertices = [];

					// Parse the face vertex data into an easy to work with format

					for ( var j = 0, jl = vertexData.length; j < jl; j ++ ) {

						var vertex = vertexData[ j ];

						if ( vertex.length > 0 ) {

							var vertexParts = vertex.split( '/' );
							faceVertices.push( vertexParts );

						}

					}

					// Draw an edge between the first vertex and all subsequent vertices to form an n-gon

					var v1 = faceVertices[ 0 ];

					for ( var j = 1, jl = faceVertices.length - 1; j < jl; j ++ ) {

						var v2 = faceVertices[ j ];
						var v3 = faceVertices[ j + 1 ];

						state.addFace(
							v1[ 0 ], v2[ 0 ], v3[ 0 ],
							v1[ 1 ], v2[ 1 ], v3[ 1 ],
							v1[ 2 ], v2[ 2 ], v3[ 2 ]
						);

					}

				} else if ( lineFirstChar === 'l' ) {

					var lineParts = line.substring( 1 ).trim().split( ' ' );
					var lineVertices = [], lineUVs = [];

					if ( line.indexOf( '/' ) === - 1 ) {

						lineVertices = lineParts;

					} else {

						for ( var li = 0, llen = lineParts.length; li < llen; li ++ ) {

							var parts = lineParts[ li ].split( '/' );

							if ( parts[ 0 ] !== '' ) lineVertices.push( parts[ 0 ] );
							if ( parts[ 1 ] !== '' ) lineUVs.push( parts[ 1 ] );

						}

					}

					state.addLineGeometry( lineVertices, lineUVs );

				} else if ( lineFirstChar === 'p' ) {

					var lineData = line.substr( 1 ).trim();
					var pointData = lineData.split( ' ' );

					state.addPointGeometry( pointData );

				} else if ( ( result = object_pattern.exec( line ) ) !== null ) {

					// o object_name
					// or
					// g group_name

					// WORKAROUND: https://bugs.chromium.org/p/v8/issues/detail?id=2869
					// var name = result[ 0 ].substr( 1 ).trim();
					var name = ( ' ' + result[ 0 ].substr( 1 ).trim() ).substr( 1 );

					state.startObject( name );

				} else if ( material_use_pattern.test( line ) ) {

					// material

					state.object.startMaterial( line.substring( 7 ).trim(), state.materialLibraries );

				} else if ( material_library_pattern.test( line ) ) {

					// mtl file

					state.materialLibraries.push( line.substring( 7 ).trim() );

				} else if ( map_use_pattern.test( line ) ) {

					// the line is parsed but ignored since the loader assumes textures are defined MTL files
					// (according to https://www.okino.com/conv/imp_wave.htm, 'usemap' is the old-style Wavefront texture reference method)

					console.warn( 'THREE.OBJLoader: Rendering identifier "usemap" not supported. Textures must be defined in MTL files.' );

				} else if ( lineFirstChar === 's' ) {

					result = line.split( ' ' );

					// smooth shading

					// @todo Handle files that have varying smooth values for a set of faces inside one geometry,
					// but does not define a usemtl for each face set.
					// This should be detected and a dummy material created (later MultiMaterial and geometry groups).
					// This requires some care to not create extra material on each smooth value for "normal" obj files.
					// where explicit usemtl defines geometry groups.
					// Example asset: examples/models/obj/cerberus/Cerberus.obj

					/*
					 * http://paulbourke.net/dataformats/obj/
					 * or
					 * http://www.cs.utah.edu/~boulos/cs3505/obj_spec.pdf
					 *
					 * From chapter "Grouping" Syntax explanation "s group_number":
					 * "group_number is the smoothing group number. To turn off smoothing groups, use a value of 0 or off.
					 * Polygonal elements use group numbers to put elements in different smoothing groups. For free-form
					 * surfaces, smoothing groups are either turned on or off; there is no difference between values greater
					 * than 0."
					 */
					if ( result.length > 1 ) {

						var value = result[ 1 ].trim().toLowerCase();
						state.object.smooth = ( value !== '0' && value !== 'off' );

					} else {

						// ZBrush can produce "s" lines #11707
						state.object.smooth = true;

					}

					var material = state.object.currentMaterial();
					if ( material ) material.smooth = state.object.smooth;

				} else {

					// Handle null terminated files without exception
					if ( line === '\0' ) continue;

					console.warn( 'THREE.OBJLoader: Unexpected line: "' + line + '"' );

				}

			}

			state.finalize();

			var container = new THREE.Group();
			container.materialLibraries = [].concat( state.materialLibraries );

			var hasPrimitives = ! ( state.objects.length === 1 && state.objects[ 0 ].geometry.vertices.length === 0 );

			if ( hasPrimitives === true ) {

				for ( var i = 0, l = state.objects.length; i < l; i ++ ) {

					var object = state.objects[ i ];
					var geometry = object.geometry;
					var materials = object.materials;
					var isLine = ( geometry.type === 'Line' );
					var isPoints = ( geometry.type === 'Points' );
					var hasVertexColors = false;

					// Skip o/g line declarations that did not follow with any faces
					if ( geometry.vertices.length === 0 ) continue;

					var buffergeometry = new THREE.BufferGeometry();

					buffergeometry.setAttribute( 'position', new THREE.Float32BufferAttribute( geometry.vertices, 3 ) );

					if ( geometry.normals.length > 0 ) {

						buffergeometry.setAttribute( 'normal', new THREE.Float32BufferAttribute( geometry.normals, 3 ) );

					}

					if ( geometry.colors.length > 0 ) {

						hasVertexColors = true;
						buffergeometry.setAttribute( 'color', new THREE.Float32BufferAttribute( geometry.colors, 3 ) );

					}

					if ( geometry.hasUVIndices === true ) {

						buffergeometry.setAttribute( 'uv', new THREE.Float32BufferAttribute( geometry.uvs, 2 ) );

					}

					// Create materials

					var createdMaterials = [];

					for ( var mi = 0, miLen = materials.length; mi < miLen; mi ++ ) {

						var sourceMaterial = materials[ mi ];
						var materialHash = sourceMaterial.name + '_' + sourceMaterial.smooth + '_' + hasVertexColors;
						var material = state.materials[ materialHash ];

						if ( this.materials !== null ) {

							material = this.materials.create( sourceMaterial.name );

							// mtl etc. loaders probably can't create line materials correctly, copy properties to a line material.
							if ( isLine && material && ! ( material instanceof THREE.LineBasicMaterial ) ) {

								var materialLine = new THREE.LineBasicMaterial();
								THREE.Material.prototype.copy.call( materialLine, material );
								materialLine.color.copy( material.color );
								material = materialLine;

							} else if ( isPoints && material && ! ( material instanceof THREE.PointsMaterial ) ) {

								var materialPoints = new THREE.PointsMaterial( { size: 10, sizeAttenuation: false } );
								THREE.Material.prototype.copy.call( materialPoints, material );
								materialPoints.color.copy( material.color );
								materialPoints.map = material.map;
								material = materialPoints;

							}

						}

						if ( material === undefined ) {

							if ( isLine ) {

								material = new THREE.LineBasicMaterial();

							} else if ( isPoints ) {

								material = new THREE.PointsMaterial( { size: 1, sizeAttenuation: false } );

							} else {

								material = new THREE.MeshPhongMaterial();

							}

							material.name = sourceMaterial.name;
							material.flatShading = sourceMaterial.smooth ? false : true;
							material.vertexColors = hasVertexColors;

							state.materials[ materialHash ] = material;

						}

						createdMaterials.push( material );

					}

					// Create mesh

					var mesh;

					if ( createdMaterials.length > 1 ) {

						for ( var mi = 0, miLen = materials.length; mi < miLen; mi ++ ) {

							var sourceMaterial = materials[ mi ];
							buffergeometry.addGroup( sourceMaterial.groupStart, sourceMaterial.groupCount, mi );

						}

						if ( isLine ) {

							mesh = new THREE.LineSegments( buffergeometry, createdMaterials );

						} else if ( isPoints ) {

							mesh = new THREE.Points( buffergeometry, createdMaterials );

						} else {

							mesh = new THREE.Mesh( buffergeometry, createdMaterials );

						}

					} else {

						if ( isLine ) {

							mesh = new THREE.LineSegments( buffergeometry, createdMaterials[ 0 ] );

						} else if ( isPoints ) {

							mesh = new THREE.Points( buffergeometry, createdMaterials[ 0 ] );

						} else {

							mesh = new THREE.Mesh( buffergeometry, createdMaterials[ 0 ] );

						}

					}

					mesh.name = object.name;

					container.add( mesh );

				}

			} else {

				// if there is only the default parser state object with no geometry data, interpret data as point cloud

				if ( state.vertices.length > 0 ) {

					var material = new THREE.PointsMaterial( { size: 1, sizeAttenuation: false } );

					var buffergeometry = new THREE.BufferGeometry();

					buffergeometry.setAttribute( 'position', new THREE.Float32BufferAttribute( state.vertices, 3 ) );

					if ( state.colors.length > 0 && state.colors[ 0 ] !== undefined ) {

						buffergeometry.setAttribute( 'color', new THREE.Float32BufferAttribute( state.colors, 3 ) );
						material.vertexColors = true;

					}

					var points = new THREE.Points( buffergeometry, material );
					container.add( points );

				}

			}

			return container;

		}

	} );

	return OBJLoader;

} )();

},{}],42:[function(_dereq_,module,exports){
THREE.BufferGeometryUtils = {

	computeTangents: function ( geometry ) {

		geometry.computeTangents();
		console.warn( 'THREE.BufferGeometryUtils: .computeTangents() has been removed. Use BufferGeometry.computeTangents() instead.' );

	},

	/**
	 * @param  {Array<THREE.BufferGeometry>} geometries
	 * @param  {Boolean} useGroups
	 * @return {THREE.BufferGeometry}
	 */
	mergeBufferGeometries: function ( geometries, useGroups ) {

		var isIndexed = geometries[ 0 ].index !== null;

		var attributesUsed = new Set( Object.keys( geometries[ 0 ].attributes ) );
		var morphAttributesUsed = new Set( Object.keys( geometries[ 0 ].morphAttributes ) );

		var attributes = {};
		var morphAttributes = {};

		var morphTargetsRelative = geometries[ 0 ].morphTargetsRelative;

		var mergedGeometry = new THREE.BufferGeometry();

		var offset = 0;

		for ( var i = 0; i < geometries.length; ++ i ) {

			var geometry = geometries[ i ];
			var attributesCount = 0;

			// ensure that all geometries are indexed, or none

			if ( isIndexed !== ( geometry.index !== null ) ) {

				console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index ' + i + '. All geometries must have compatible attributes; make sure index attribute exists among all geometries, or in none of them.' );
				return null;

			}

			// gather attributes, exit early if they're different

			for ( var name in geometry.attributes ) {

				if ( ! attributesUsed.has( name ) ) {

					console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index ' + i + '. All geometries must have compatible attributes; make sure "' + name + '" attribute exists among all geometries, or in none of them.' );
					return null;

				}

				if ( attributes[ name ] === undefined ) attributes[ name ] = [];

				attributes[ name ].push( geometry.attributes[ name ] );

				attributesCount ++;

			}

			// ensure geometries have the same number of attributes

			if ( attributesCount !== attributesUsed.size ) {

				console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index ' + i + '. Make sure all geometries have the same number of attributes.' );
				return null;

			}

			// gather morph attributes, exit early if they're different

			if ( morphTargetsRelative !== geometry.morphTargetsRelative ) {

				console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index ' + i + '. .morphTargetsRelative must be consistent throughout all geometries.' );
				return null;

			}

			for ( var name in geometry.morphAttributes ) {

				if ( ! morphAttributesUsed.has( name ) ) {

					console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index ' + i + '.  .morphAttributes must be consistent throughout all geometries.' );
					return null;

				}

				if ( morphAttributes[ name ] === undefined ) morphAttributes[ name ] = [];

				morphAttributes[ name ].push( geometry.morphAttributes[ name ] );

			}

			// gather .userData

			mergedGeometry.userData.mergedUserData = mergedGeometry.userData.mergedUserData || [];
			mergedGeometry.userData.mergedUserData.push( geometry.userData );

			if ( useGroups ) {

				var count;

				if ( isIndexed ) {

					count = geometry.index.count;

				} else if ( geometry.attributes.position !== undefined ) {

					count = geometry.attributes.position.count;

				} else {

					console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index ' + i + '. The geometry must have either an index or a position attribute' );
					return null;

				}

				mergedGeometry.addGroup( offset, count, i );

				offset += count;

			}

		}

		// merge indices

		if ( isIndexed ) {

			var indexOffset = 0;
			var mergedIndex = [];

			for ( var i = 0; i < geometries.length; ++ i ) {

				var index = geometries[ i ].index;

				for ( var j = 0; j < index.count; ++ j ) {

					mergedIndex.push( index.getX( j ) + indexOffset );

				}

				indexOffset += geometries[ i ].attributes.position.count;

			}

			mergedGeometry.setIndex( mergedIndex );

		}

		// merge attributes

		for ( var name in attributes ) {

			var mergedAttribute = this.mergeBufferAttributes( attributes[ name ] );

			if ( ! mergedAttribute ) {

				console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed while trying to merge the ' + name + ' attribute.' );
				return null;

			}

			mergedGeometry.setAttribute( name, mergedAttribute );

		}

		// merge morph attributes

		for ( var name in morphAttributes ) {

			var numMorphTargets = morphAttributes[ name ][ 0 ].length;

			if ( numMorphTargets === 0 ) break;

			mergedGeometry.morphAttributes = mergedGeometry.morphAttributes || {};
			mergedGeometry.morphAttributes[ name ] = [];

			for ( var i = 0; i < numMorphTargets; ++ i ) {

				var morphAttributesToMerge = [];

				for ( var j = 0; j < morphAttributes[ name ].length; ++ j ) {

					morphAttributesToMerge.push( morphAttributes[ name ][ j ][ i ] );

				}

				var mergedMorphAttribute = this.mergeBufferAttributes( morphAttributesToMerge );

				if ( ! mergedMorphAttribute ) {

					console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed while trying to merge the ' + name + ' morphAttribute.' );
					return null;

				}

				mergedGeometry.morphAttributes[ name ].push( mergedMorphAttribute );

			}

		}

		return mergedGeometry;

	},

	/**
	 * @param {Array<THREE.BufferAttribute>} attributes
	 * @return {THREE.BufferAttribute}
	 */
	mergeBufferAttributes: function ( attributes ) {

		var TypedArray;
		var itemSize;
		var normalized;
		var arrayLength = 0;

		for ( var i = 0; i < attributes.length; ++ i ) {

			var attribute = attributes[ i ];

			if ( attribute.isInterleavedBufferAttribute ) {

				console.error( 'THREE.BufferGeometryUtils: .mergeBufferAttributes() failed. InterleavedBufferAttributes are not supported.' );
				return null;

			}

			if ( TypedArray === undefined ) TypedArray = attribute.array.constructor;
			if ( TypedArray !== attribute.array.constructor ) {

				console.error( 'THREE.BufferGeometryUtils: .mergeBufferAttributes() failed. BufferAttribute.array must be of consistent array types across matching attributes.' );
				return null;

			}

			if ( itemSize === undefined ) itemSize = attribute.itemSize;
			if ( itemSize !== attribute.itemSize ) {

				console.error( 'THREE.BufferGeometryUtils: .mergeBufferAttributes() failed. BufferAttribute.itemSize must be consistent across matching attributes.' );
				return null;

			}

			if ( normalized === undefined ) normalized = attribute.normalized;
			if ( normalized !== attribute.normalized ) {

				console.error( 'THREE.BufferGeometryUtils: .mergeBufferAttributes() failed. BufferAttribute.normalized must be consistent across matching attributes.' );
				return null;

			}

			arrayLength += attribute.array.length;

		}

		var array = new TypedArray( arrayLength );
		var offset = 0;

		for ( var i = 0; i < attributes.length; ++ i ) {

			array.set( attributes[ i ].array, offset );

			offset += attributes[ i ].array.length;

		}

		return new THREE.BufferAttribute( array, itemSize, normalized );

	},

	/**
	 * @param {Array<THREE.BufferAttribute>} attributes
	 * @return {Array<THREE.InterleavedBufferAttribute>}
	 */
	interleaveAttributes: function ( attributes ) {

		// Interleaves the provided attributes into an InterleavedBuffer and returns
		// a set of InterleavedBufferAttributes for each attribute
		var TypedArray;
		var arrayLength = 0;
		var stride = 0;

		// calculate the the length and type of the interleavedBuffer
		for ( var i = 0, l = attributes.length; i < l; ++ i ) {

			var attribute = attributes[ i ];

			if ( TypedArray === undefined ) TypedArray = attribute.array.constructor;
			if ( TypedArray !== attribute.array.constructor ) {

				console.error( 'AttributeBuffers of different types cannot be interleaved' );
				return null;

			}

			arrayLength += attribute.array.length;
			stride += attribute.itemSize;

		}

		// Create the set of buffer attributes
		var interleavedBuffer = new THREE.InterleavedBuffer( new TypedArray( arrayLength ), stride );
		var offset = 0;
		var res = [];
		var getters = [ 'getX', 'getY', 'getZ', 'getW' ];
		var setters = [ 'setX', 'setY', 'setZ', 'setW' ];

		for ( var j = 0, l = attributes.length; j < l; j ++ ) {

			var attribute = attributes[ j ];
			var itemSize = attribute.itemSize;
			var count = attribute.count;
			var iba = new THREE.InterleavedBufferAttribute( interleavedBuffer, itemSize, offset, attribute.normalized );
			res.push( iba );

			offset += itemSize;

			// Move the data for each attribute into the new interleavedBuffer
			// at the appropriate offset
			for ( var c = 0; c < count; c ++ ) {

				for ( var k = 0; k < itemSize; k ++ ) {

					iba[ setters[ k ] ]( c, attribute[ getters[ k ] ]( c ) );

				}

			}

		}

		return res;

	},

	/**
	 * @param {Array<THREE.BufferGeometry>} geometry
	 * @return {number}
	 */
	estimateBytesUsed: function ( geometry ) {

		// Return the estimated memory used by this geometry in bytes
		// Calculate using itemSize, count, and BYTES_PER_ELEMENT to account
		// for InterleavedBufferAttributes.
		var mem = 0;
		for ( var name in geometry.attributes ) {

			var attr = geometry.getAttribute( name );
			mem += attr.count * attr.itemSize * attr.array.BYTES_PER_ELEMENT;

		}

		var indices = geometry.getIndex();
		mem += indices ? indices.count * indices.itemSize * indices.array.BYTES_PER_ELEMENT : 0;
		return mem;

	},

	/**
	 * @param {THREE.BufferGeometry} geometry
	 * @param {number} tolerance
	 * @return {THREE.BufferGeometry>}
	 */
	mergeVertices: function ( geometry, tolerance = 1e-4 ) {

		tolerance = Math.max( tolerance, Number.EPSILON );

		// Generate an index buffer if the geometry doesn't have one, or optimize it
		// if it's already available.
		var hashToIndex = {};
		var indices = geometry.getIndex();
		var positions = geometry.getAttribute( 'position' );
		var vertexCount = indices ? indices.count : positions.count;

		// next value for triangle indices
		var nextIndex = 0;

		// attributes and new attribute arrays
		var attributeNames = Object.keys( geometry.attributes );
		var attrArrays = {};
		var morphAttrsArrays = {};
		var newIndices = [];
		var getters = [ 'getX', 'getY', 'getZ', 'getW' ];

		// initialize the arrays
		for ( var i = 0, l = attributeNames.length; i < l; i ++ ) {

			var name = attributeNames[ i ];

			attrArrays[ name ] = [];

			var morphAttr = geometry.morphAttributes[ name ];
			if ( morphAttr ) {

				morphAttrsArrays[ name ] = new Array( morphAttr.length ).fill().map( () => [] );

			}

		}

		// convert the error tolerance to an amount of decimal places to truncate to
		var decimalShift = Math.log10( 1 / tolerance );
		var shiftMultiplier = Math.pow( 10, decimalShift );
		for ( var i = 0; i < vertexCount; i ++ ) {

			var index = indices ? indices.getX( i ) : i;

			// Generate a hash for the vertex attributes at the current index 'i'
			var hash = '';
			for ( var j = 0, l = attributeNames.length; j < l; j ++ ) {

				var name = attributeNames[ j ];
				var attribute = geometry.getAttribute( name );
				var itemSize = attribute.itemSize;

				for ( var k = 0; k < itemSize; k ++ ) {

					// double tilde truncates the decimal value
					hash += `${ ~ ~ ( attribute[ getters[ k ] ]( index ) * shiftMultiplier ) },`;

				}

			}

			// Add another reference to the vertex if it's already
			// used by another index
			if ( hash in hashToIndex ) {

				newIndices.push( hashToIndex[ hash ] );

			} else {

				// copy data to the new index in the attribute arrays
				for ( var j = 0, l = attributeNames.length; j < l; j ++ ) {

					var name = attributeNames[ j ];
					var attribute = geometry.getAttribute( name );
					var morphAttr = geometry.morphAttributes[ name ];
					var itemSize = attribute.itemSize;
					var newarray = attrArrays[ name ];
					var newMorphArrays = morphAttrsArrays[ name ];

					for ( var k = 0; k < itemSize; k ++ ) {

						var getterFunc = getters[ k ];
						newarray.push( attribute[ getterFunc ]( index ) );

						if ( morphAttr ) {

							for ( var m = 0, ml = morphAttr.length; m < ml; m ++ ) {

								newMorphArrays[ m ].push( morphAttr[ m ][ getterFunc ]( index ) );

							}

						}

					}

				}

				hashToIndex[ hash ] = nextIndex;
				newIndices.push( nextIndex );
				nextIndex ++;

			}

		}

		// Generate typed arrays from new attribute arrays and update
		// the attributeBuffers
		const result = geometry.clone();
		for ( var i = 0, l = attributeNames.length; i < l; i ++ ) {

			var name = attributeNames[ i ];
			var oldAttribute = geometry.getAttribute( name );

			var buffer = new oldAttribute.array.constructor( attrArrays[ name ] );
			var attribute = new THREE.BufferAttribute( buffer, oldAttribute.itemSize, oldAttribute.normalized );

			result.setAttribute( name, attribute );

			// Update the attribute arrays
			if ( name in morphAttrsArrays ) {

				for ( var j = 0; j < morphAttrsArrays[ name ].length; j ++ ) {

					var oldMorphAttribute = geometry.morphAttributes[ name ][ j ];

					var buffer = new oldMorphAttribute.array.constructor( morphAttrsArrays[ name ][ j ] );
					var morphAttribute = new THREE.BufferAttribute( buffer, oldMorphAttribute.itemSize, oldMorphAttribute.normalized );
					result.morphAttributes[ name ][ j ] = morphAttribute;

				}

			}

		}

		// indices

		result.setIndex( newIndices );

		return result;

	},

	/**
	 * @param {THREE.BufferGeometry} geometry
	 * @param {number} drawMode
	 * @return {THREE.BufferGeometry>}
	 */
	toTrianglesDrawMode: function ( geometry, drawMode ) {

		if ( drawMode === THREE.TrianglesDrawMode ) {

			console.warn( 'THREE.BufferGeometryUtils.toTrianglesDrawMode(): Geometry already defined as triangles.' );
			return geometry;

		}

		if ( drawMode === THREE.TriangleFanDrawMode || drawMode === THREE.TriangleStripDrawMode ) {

			var index = geometry.getIndex();

			// generate index if not present

			if ( index === null ) {

				var indices = [];

				var position = geometry.getAttribute( 'position' );

				if ( position !== undefined ) {

					for ( var i = 0; i < position.count; i ++ ) {

						indices.push( i );

					}

					geometry.setIndex( indices );
					index = geometry.getIndex();

				} else {

					console.error( 'THREE.BufferGeometryUtils.toTrianglesDrawMode(): Undefined position attribute. Processing not possible.' );
					return geometry;

				}

			}

			//

			var numberOfTriangles = index.count - 2;
			var newIndices = [];

			if ( drawMode === THREE.TriangleFanDrawMode ) {

				// gl.TRIANGLE_FAN

				for ( var i = 1; i <= numberOfTriangles; i ++ ) {

					newIndices.push( index.getX( 0 ) );
					newIndices.push( index.getX( i ) );
					newIndices.push( index.getX( i + 1 ) );

				}

			} else {

				// gl.TRIANGLE_STRIP

				for ( var i = 0; i < numberOfTriangles; i ++ ) {

					if ( i % 2 === 0 ) {

						newIndices.push( index.getX( i ) );
						newIndices.push( index.getX( i + 1 ) );
						newIndices.push( index.getX( i + 2 ) );

					} else {

						newIndices.push( index.getX( i + 2 ) );
						newIndices.push( index.getX( i + 1 ) );
						newIndices.push( index.getX( i ) );

					}

				}

			}

			if ( ( newIndices.length / 3 ) !== numberOfTriangles ) {

				console.error( 'THREE.BufferGeometryUtils.toTrianglesDrawMode(): Unable to generate correct amount of triangles.' );

			}

			// build final geometry

			var newGeometry = geometry.clone();
			newGeometry.setIndex( newIndices );
			newGeometry.clearGroups();

			return newGeometry;

		} else {

			console.error( 'THREE.BufferGeometryUtils.toTrianglesDrawMode(): Unknown draw mode:', drawMode );
			return geometry;

		}

	},

	/**
	 * Calculates the morphed attributes of a morphed/skinned BufferGeometry.
	 * Helpful for Raytracing or Decals.
	 * @param {Mesh | Line | Points} object An instance of Mesh, Line or Points.
	 * @return {Object} An Object with original position/normal attributes and morphed ones.
	 */
	computeMorphedAttributes: function ( object ) {

		if ( object.geometry.isBufferGeometry !== true ) {

			console.error( 'THREE.BufferGeometryUtils: Geometry is not of type THREE.BufferGeometry.' );
			return null;

		}

		var _vA = new THREE.Vector3();
		var _vB = new THREE.Vector3();
		var _vC = new THREE.Vector3();

		var _tempA = new THREE.Vector3();
		var _tempB = new THREE.Vector3();
		var _tempC = new THREE.Vector3();

		var _morphA = new THREE.Vector3();
		var _morphB = new THREE.Vector3();
		var _morphC = new THREE.Vector3();

		function _calculateMorphedAttributeData(
			object,
			material,
			attribute,
			morphAttribute,
			morphTargetsRelative,
			a,
			b,
			c,
			modifiedAttributeArray
		) {

			_vA.fromBufferAttribute( attribute, a );
			_vB.fromBufferAttribute( attribute, b );
			_vC.fromBufferAttribute( attribute, c );

			var morphInfluences = object.morphTargetInfluences;

			if ( material.morphTargets && morphAttribute && morphInfluences ) {

				_morphA.set( 0, 0, 0 );
				_morphB.set( 0, 0, 0 );
				_morphC.set( 0, 0, 0 );

				for ( var i = 0, il = morphAttribute.length; i < il; i ++ ) {

					var influence = morphInfluences[ i ];
					var morphAttribute = morphAttribute[ i ];

					if ( influence === 0 ) continue;

					_tempA.fromBufferAttribute( morphAttribute, a );
					_tempB.fromBufferAttribute( morphAttribute, b );
					_tempC.fromBufferAttribute( morphAttribute, c );

					if ( morphTargetsRelative ) {

						_morphA.addScaledVector( _tempA, influence );
						_morphB.addScaledVector( _tempB, influence );
						_morphC.addScaledVector( _tempC, influence );

					} else {

						_morphA.addScaledVector( _tempA.sub( _vA ), influence );
						_morphB.addScaledVector( _tempB.sub( _vB ), influence );
						_morphC.addScaledVector( _tempC.sub( _vC ), influence );

					}

				}

				_vA.add( _morphA );
				_vB.add( _morphB );
				_vC.add( _morphC );

			}

			if ( object.isSkinnedMesh ) {

				object.boneTransform( a, _vA );
				object.boneTransform( b, _vB );
				object.boneTransform( c, _vC );

			}

			modifiedAttributeArray[ a * 3 + 0 ] = _vA.x;
			modifiedAttributeArray[ a * 3 + 1 ] = _vA.y;
			modifiedAttributeArray[ a * 3 + 2 ] = _vA.z;
			modifiedAttributeArray[ b * 3 + 0 ] = _vB.x;
			modifiedAttributeArray[ b * 3 + 1 ] = _vB.y;
			modifiedAttributeArray[ b * 3 + 2 ] = _vB.z;
			modifiedAttributeArray[ c * 3 + 0 ] = _vC.x;
			modifiedAttributeArray[ c * 3 + 1 ] = _vC.y;
			modifiedAttributeArray[ c * 3 + 2 ] = _vC.z;

		}

		var geometry = object.geometry;
		var material = object.material;

		var a, b, c;
		var index = geometry.index;
		var positionAttribute = geometry.attributes.position;
		var morphPosition = geometry.morphAttributes.position;
		var morphTargetsRelative = geometry.morphTargetsRelative;
		var normalAttribute = geometry.attributes.normal;
		var morphNormal = geometry.morphAttributes.position;

		var groups = geometry.groups;
		var drawRange = geometry.drawRange;
		var i, j, il, jl;
		var group, groupMaterial;
		var start, end;

		var modifiedPosition = new Float32Array( positionAttribute.count * positionAttribute.itemSize );
		var modifiedNormal = new Float32Array( normalAttribute.count * normalAttribute.itemSize );

		if ( index !== null ) {

			// indexed buffer geometry

			if ( Array.isArray( material ) ) {

				for ( i = 0, il = groups.length; i < il; i ++ ) {

					group = groups[ i ];
					groupMaterial = material[ group.materialIndex ];

					start = Math.max( group.start, drawRange.start );
					end = Math.min( ( group.start + group.count ), ( drawRange.start + drawRange.count ) );

					for ( j = start, jl = end; j < jl; j += 3 ) {

						a = index.getX( j );
						b = index.getX( j + 1 );
						c = index.getX( j + 2 );

						_calculateMorphedAttributeData(
							object,
							groupMaterial,
							positionAttribute,
							morphPosition,
							morphTargetsRelative,
							a, b, c,
							modifiedPosition
						);

						_calculateMorphedAttributeData(
							object,
							groupMaterial,
							normalAttribute,
							morphNormal,
							morphTargetsRelative,
							a, b, c,
							modifiedNormal
						);

					}

				}

			} else {

				start = Math.max( 0, drawRange.start );
				end = Math.min( index.count, ( drawRange.start + drawRange.count ) );

				for ( i = start, il = end; i < il; i += 3 ) {

					a = index.getX( i );
					b = index.getX( i + 1 );
					c = index.getX( i + 2 );

					_calculateMorphedAttributeData(
						object,
						material,
						positionAttribute,
						morphPosition,
						morphTargetsRelative,
						a, b, c,
						modifiedPosition
					);

					_calculateMorphedAttributeData(
						object,
						material,
						normalAttribute,
						morphNormal,
						morphTargetsRelative,
						a, b, c,
						modifiedNormal
					);

				}

			}

		} else if ( positionAttribute !== undefined ) {

			// non-indexed buffer geometry

			if ( Array.isArray( material ) ) {

				for ( i = 0, il = groups.length; i < il; i ++ ) {

					group = groups[ i ];
					groupMaterial = material[ group.materialIndex ];

					start = Math.max( group.start, drawRange.start );
					end = Math.min( ( group.start + group.count ), ( drawRange.start + drawRange.count ) );

					for ( j = start, jl = end; j < jl; j += 3 ) {

						a = j;
						b = j + 1;
						c = j + 2;

						_calculateMorphedAttributeData(
							object,
							groupMaterial,
							positionAttribute,
							morphPosition,
							morphTargetsRelative,
							a, b, c,
							modifiedPosition
						);

						_calculateMorphedAttributeData(
							object,
							groupMaterial,
							normalAttribute,
							morphNormal,
							morphTargetsRelative,
							a, b, c,
							modifiedNormal
						);

					}

				}

			} else {

				start = Math.max( 0, drawRange.start );
				end = Math.min( positionAttribute.count, ( drawRange.start + drawRange.count ) );

				for ( i = start, il = end; i < il; i += 3 ) {

					a = i;
					b = i + 1;
					c = i + 2;

					_calculateMorphedAttributeData(
						object,
						material,
						positionAttribute,
						morphPosition,
						morphTargetsRelative,
						a, b, c,
						modifiedPosition
					);

					_calculateMorphedAttributeData(
						object,
						material,
						normalAttribute,
						morphNormal,
						morphTargetsRelative,
						a, b, c,
						modifiedNormal
					);

				}

			}

		}

		var morphedPositionAttribute = new THREE.Float32BufferAttribute( modifiedPosition, 3 );
		var morphedNormalAttribute = new THREE.Float32BufferAttribute( modifiedNormal, 3 );

		return {

			positionAttribute: positionAttribute,
			normalAttribute: normalAttribute,
			morphedPositionAttribute: morphedPositionAttribute,
			morphedNormalAttribute: morphedNormalAttribute

		};

	}

};

},{}],43:[function(_dereq_,module,exports){
var createLayout = _dereq_('layout-bmfont-text')
var inherits = _dereq_('inherits')
var createIndices = _dereq_('quad-indices')
var buffer = _dereq_('three-buffer-vertex-data')
var assign = _dereq_('object-assign')

var vertices = _dereq_('./lib/vertices')
var utils = _dereq_('./lib/utils')

var Base = THREE.BufferGeometry

module.exports = function createTextGeometry (opt) {
  return new TextGeometry(opt)
}

function TextGeometry (opt) {
  Base.call(this)

  if (typeof opt === 'string') {
    opt = { text: opt }
  }

  // use these as default values for any subsequent
  // calls to update()
  this._opt = assign({}, opt)

  // also do an initial setup...
  if (opt) this.update(opt)
}

inherits(TextGeometry, Base)

TextGeometry.prototype.update = function (opt) {
  if (typeof opt === 'string') {
    opt = { text: opt }
  }

  // use constructor defaults
  opt = assign({}, this._opt, opt)

  if (!opt.font) {
    throw new TypeError('must specify a { font } in options')
  }

  this.layout = createLayout(opt)

  // get vec2 texcoords
  var flipY = opt.flipY !== false

  // the desired BMFont data
  var font = opt.font

  // determine texture size from font file
  var texWidth = font.common.scaleW
  var texHeight = font.common.scaleH

  // get visible glyphs
  var glyphs = this.layout.glyphs.filter(function (glyph) {
    var bitmap = glyph.data
    return bitmap.width * bitmap.height > 0
  })

  // provide visible glyphs for convenience
  this.visibleGlyphs = glyphs

  // get common vertex data
  var positions = vertices.positions(glyphs)
  var uvs = vertices.uvs(glyphs, texWidth, texHeight, flipY)
  var indices = createIndices({
    clockwise: true,
    type: 'uint16',
    count: glyphs.length
  })

  // update vertex data
  buffer.index(this, indices, 1, 'uint16')
  buffer.attr(this, 'position', positions, 2)
  buffer.attr(this, 'uv', uvs, 2)

  // update multipage data
  if (!opt.multipage && 'page' in this.attributes) {
    // disable multipage rendering
    this.removeAttribute('page')
  } else if (opt.multipage) {
    var pages = vertices.pages(glyphs)
    // enable multipage rendering
    buffer.attr(this, 'page', pages, 1)
  }
}

TextGeometry.prototype.computeBoundingSphere = function () {
  if (this.boundingSphere === null) {
    this.boundingSphere = new THREE.Sphere()
  }

  var positions = this.attributes.position.array
  var itemSize = this.attributes.position.itemSize
  if (!positions || !itemSize || positions.length < 2) {
    this.boundingSphere.radius = 0
    this.boundingSphere.center.set(0, 0, 0)
    return
  }
  utils.computeSphere(positions, this.boundingSphere)
  if (isNaN(this.boundingSphere.radius)) {
    console.error('THREE.BufferGeometry.computeBoundingSphere(): ' +
      'Computed radius is NaN. The ' +
      '"position" attribute is likely to have NaN values.')
  }
}

TextGeometry.prototype.computeBoundingBox = function () {
  if (this.boundingBox === null) {
    this.boundingBox = new THREE.Box3()
  }

  var bbox = this.boundingBox
  var positions = this.attributes.position.array
  var itemSize = this.attributes.position.itemSize
  if (!positions || !itemSize || positions.length < 2) {
    bbox.makeEmpty()
    return
  }
  utils.computeBox(positions, bbox)
}

},{"./lib/utils":44,"./lib/vertices":45,"inherits":19,"layout-bmfont-text":24,"object-assign":27,"quad-indices":35,"three-buffer-vertex-data":46}],44:[function(_dereq_,module,exports){
var itemSize = 2
var box = { min: [0, 0], max: [0, 0] }

function bounds (positions) {
  var count = positions.length / itemSize
  box.min[0] = positions[0]
  box.min[1] = positions[1]
  box.max[0] = positions[0]
  box.max[1] = positions[1]

  for (var i = 0; i < count; i++) {
    var x = positions[i * itemSize + 0]
    var y = positions[i * itemSize + 1]
    box.min[0] = Math.min(x, box.min[0])
    box.min[1] = Math.min(y, box.min[1])
    box.max[0] = Math.max(x, box.max[0])
    box.max[1] = Math.max(y, box.max[1])
  }
}

module.exports.computeBox = function (positions, output) {
  bounds(positions)
  output.min.set(box.min[0], box.min[1], 0)
  output.max.set(box.max[0], box.max[1], 0)
}

module.exports.computeSphere = function (positions, output) {
  bounds(positions)
  var minX = box.min[0]
  var minY = box.min[1]
  var maxX = box.max[0]
  var maxY = box.max[1]
  var width = maxX - minX
  var height = maxY - minY
  var length = Math.sqrt(width * width + height * height)
  output.center.set(minX + width / 2, minY + height / 2, 0)
  output.radius = length / 2
}

},{}],45:[function(_dereq_,module,exports){
module.exports.pages = function pages (glyphs) {
  var pages = new Float32Array(glyphs.length * 4 * 1)
  var i = 0
  glyphs.forEach(function (glyph) {
    var id = glyph.data.page || 0
    pages[i++] = id
    pages[i++] = id
    pages[i++] = id
    pages[i++] = id
  })
  return pages
}

module.exports.uvs = function uvs (glyphs, texWidth, texHeight, flipY) {
  var uvs = new Float32Array(glyphs.length * 4 * 2)
  var i = 0
  glyphs.forEach(function (glyph) {
    var bitmap = glyph.data
    var bw = (bitmap.x + bitmap.width)
    var bh = (bitmap.y + bitmap.height)

    // top left position
    var u0 = bitmap.x / texWidth
    var v1 = bitmap.y / texHeight
    var u1 = bw / texWidth
    var v0 = bh / texHeight

    if (flipY) {
      v1 = (texHeight - bitmap.y) / texHeight
      v0 = (texHeight - bh) / texHeight
    }

    // BL
    uvs[i++] = u0
    uvs[i++] = v1
    // TL
    uvs[i++] = u0
    uvs[i++] = v0
    // TR
    uvs[i++] = u1
    uvs[i++] = v0
    // BR
    uvs[i++] = u1
    uvs[i++] = v1
  })
  return uvs
}

module.exports.positions = function positions (glyphs) {
  var positions = new Float32Array(glyphs.length * 4 * 2)
  var i = 0
  glyphs.forEach(function (glyph) {
    var bitmap = glyph.data

    // bottom left position
    var x = glyph.position[0] + bitmap.xoffset
    var y = glyph.position[1] + bitmap.yoffset

    // quad size
    var w = bitmap.width
    var h = bitmap.height

    // BL
    positions[i++] = x
    positions[i++] = y
    // TL
    positions[i++] = x
    positions[i++] = y + h
    // TR
    positions[i++] = x + w
    positions[i++] = y + h
    // BR
    positions[i++] = x + w
    positions[i++] = y
  })
  return positions
}

},{}],46:[function(_dereq_,module,exports){
var flatten = _dereq_('flatten-vertex-data')
var warned = false;

module.exports.attr = setAttribute
module.exports.index = setIndex

function setIndex (geometry, data, itemSize, dtype) {
  if (typeof itemSize !== 'number') itemSize = 1
  if (typeof dtype !== 'string') dtype = 'uint16'

  var isR69 = !geometry.index && typeof geometry.setIndex !== 'function'
  var attrib = isR69 ? geometry.getAttribute('index') : geometry.index
  var newAttrib = updateAttribute(attrib, data, itemSize, dtype)
  if (newAttrib) {
    if (isR69) geometry.addAttribute('index', newAttrib)
    else geometry.index = newAttrib
  }
}

function setAttribute (geometry, key, data, itemSize, dtype) {
  if (typeof itemSize !== 'number') itemSize = 3
  if (typeof dtype !== 'string') dtype = 'float32'
  if (Array.isArray(data) &&
    Array.isArray(data[0]) &&
    data[0].length !== itemSize) {
    throw new Error('Nested vertex array has unexpected size; expected ' +
      itemSize + ' but found ' + data[0].length)
  }

  var attrib = geometry.getAttribute(key)
  var newAttrib = updateAttribute(attrib, data, itemSize, dtype)
  geometry.setAttribute(key, newAttrib)
}

function updateAttribute (attrib, data, itemSize, dtype) {
  data = data || []

  // create a new array with desired type
  data = flatten(data, dtype)

  attrib = new THREE.BufferAttribute(data, itemSize);
  attrib.itemSize = itemSize;
  attrib.needsUpdate = true;

  return attrib
}

// Test whether the attribute needs to be re-created,
// returns false if we can re-use it as-is.
function rebuildAttribute (attrib, data, itemSize) {
  if (attrib.itemSize !== itemSize) return true
  if (!attrib.array) return true
  var attribLength = attrib.array.length
  if (Array.isArray(data) && Array.isArray(data[0])) {
    // [ [ x, y, z ] ]
    return attribLength !== data.length * itemSize
  } else {
    // [ x, y, z ]
    return attribLength !== data.length
  }
  return false
}

},{"flatten-vertex-data":15}],47:[function(_dereq_,module,exports){
(function (setImmediate,clearImmediate){
var nextTick = _dereq_('process/browser.js').nextTick;
var apply = Function.prototype.apply;
var slice = Array.prototype.slice;
var immediateIds = {};
var nextImmediateId = 0;

// DOM APIs, for completeness

exports.setTimeout = function() {
  return new Timeout(apply.call(setTimeout, window, arguments), clearTimeout);
};
exports.setInterval = function() {
  return new Timeout(apply.call(setInterval, window, arguments), clearInterval);
};
exports.clearTimeout =
exports.clearInterval = function(timeout) { timeout.close(); };

function Timeout(id, clearFn) {
  this._id = id;
  this._clearFn = clearFn;
}
Timeout.prototype.unref = Timeout.prototype.ref = function() {};
Timeout.prototype.close = function() {
  this._clearFn.call(window, this._id);
};

// Does not start the time, just sets up the members needed.
exports.enroll = function(item, msecs) {
  clearTimeout(item._idleTimeoutId);
  item._idleTimeout = msecs;
};

exports.unenroll = function(item) {
  clearTimeout(item._idleTimeoutId);
  item._idleTimeout = -1;
};

exports._unrefActive = exports.active = function(item) {
  clearTimeout(item._idleTimeoutId);

  var msecs = item._idleTimeout;
  if (msecs >= 0) {
    item._idleTimeoutId = setTimeout(function onTimeout() {
      if (item._onTimeout)
        item._onTimeout();
    }, msecs);
  }
};

// That's not how node.js implements it but the exposed api is the same.
exports.setImmediate = typeof setImmediate === "function" ? setImmediate : function(fn) {
  var id = nextImmediateId++;
  var args = arguments.length < 2 ? false : slice.call(arguments, 1);

  immediateIds[id] = true;

  nextTick(function onNextTick() {
    if (immediateIds[id]) {
      // fn.call() is faster so we optimize for the common use-case
      // @see http://jsperf.com/call-apply-segu
      if (args) {
        fn.apply(null, args);
      } else {
        fn.call(null);
      }
      // Prevent ids from leaking
      exports.clearImmediate(id);
    }
  });

  return id;
};

exports.clearImmediate = typeof clearImmediate === "function" ? clearImmediate : function(id) {
  delete immediateIds[id];
};
}).call(this,_dereq_("timers").setImmediate,_dereq_("timers").clearImmediate)

},{"process/browser.js":48,"timers":47}],48:[function(_dereq_,module,exports){
arguments[4][5][0].apply(exports,arguments)
},{"dup":5}],49:[function(_dereq_,module,exports){

exports = module.exports = trim;

function trim(str){
  return str.replace(/^\s*|\s*$/g, '');
}

exports.left = function(str){
  return str.replace(/^\s*/, '');
};

exports.right = function(str){
  return str.replace(/\s*$/, '');
};

},{}],50:[function(_dereq_,module,exports){
(function (global){
/**
 * @license
 * webvr-polyfill
 * Copyright (c) 2015-2017 Google
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @license
 * cardboard-vr-display
 * Copyright (c) 2015-2017 Google
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @license
 * webvr-polyfill-dpdb 
 * Copyright (c) 2017 Google
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @license
 * wglu-preserve-state
 * Copyright (c) 2016, Brandon Jones.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/**
 * @license
 * nosleep.js
 * Copyright (c) 2017, Rich Tibbett
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global.WebVRPolyfill = factory());
}(this, (function () { 'use strict';

var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};



function unwrapExports (x) {
	return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
}

function createCommonjsModule(fn, module) {
	return module = { exports: {} }, fn(module, module.exports), module.exports;
}

var isMobile = function isMobile() {
  return (/Android/i.test(navigator.userAgent) || /iPhone|iPad|iPod/i.test(navigator.userAgent)
  );
};
var copyArray = function copyArray(source, dest) {
  for (var i = 0, n = source.length; i < n; i++) {
    dest[i] = source[i];
  }
};
var extend = function extend(dest, src) {
  for (var key in src) {
    if (src.hasOwnProperty(key)) {
      dest[key] = src[key];
    }
  }
  return dest;
};

var cardboardVrDisplay = createCommonjsModule(function (module, exports) {
/**
 * @license
 * cardboard-vr-display
 * Copyright (c) 2015-2017 Google
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * @license
 * gl-preserve-state
 * Copyright (c) 2016, Brandon Jones.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
/**
 * @license
 * webvr-polyfill-dpdb
 * Copyright (c) 2015-2017 Google
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * @license
 * nosleep.js
 * Copyright (c) 2017, Rich Tibbett
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
(function (global, factory) {
	module.exports = factory();
}(commonjsGlobal, (function () { var classCallCheck = function (instance, Constructor) {
  if (!(instance instanceof Constructor)) {
    throw new TypeError("Cannot call a class as a function");
  }
};
var createClass = function () {
  function defineProperties(target, props) {
    for (var i = 0; i < props.length; i++) {
      var descriptor = props[i];
      descriptor.enumerable = descriptor.enumerable || false;
      descriptor.configurable = true;
      if ("value" in descriptor) descriptor.writable = true;
      Object.defineProperty(target, descriptor.key, descriptor);
    }
  }
  return function (Constructor, protoProps, staticProps) {
    if (protoProps) defineProperties(Constructor.prototype, protoProps);
    if (staticProps) defineProperties(Constructor, staticProps);
    return Constructor;
  };
}();
var slicedToArray = function () {
  function sliceIterator(arr, i) {
    var _arr = [];
    var _n = true;
    var _d = false;
    var _e = undefined;
    try {
      for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
        _arr.push(_s.value);
        if (i && _arr.length === i) break;
      }
    } catch (err) {
      _d = true;
      _e = err;
    } finally {
      try {
        if (!_n && _i["return"]) _i["return"]();
      } finally {
        if (_d) throw _e;
      }
    }
    return _arr;
  }
  return function (arr, i) {
    if (Array.isArray(arr)) {
      return arr;
    } else if (Symbol.iterator in Object(arr)) {
      return sliceIterator(arr, i);
    } else {
      throw new TypeError("Invalid attempt to destructure non-iterable instance");
    }
  };
}();
var MIN_TIMESTEP = 0.001;
var MAX_TIMESTEP = 1;
var dataUri = function dataUri(mimeType, svg) {
  return 'data:' + mimeType + ',' + encodeURIComponent(svg);
};
var lerp = function lerp(a, b, t) {
  return a + (b - a) * t;
};
var isIOS = function () {
  var isIOS = /iPad|iPhone|iPod/.test(navigator.platform);
  return function () {
    return isIOS;
  };
}();
var isWebViewAndroid = function () {
  var isWebViewAndroid = navigator.userAgent.indexOf('Version') !== -1 && navigator.userAgent.indexOf('Android') !== -1 && navigator.userAgent.indexOf('Chrome') !== -1;
  return function () {
    return isWebViewAndroid;
  };
}();
var isSafari = function () {
  var isSafari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent);
  return function () {
    return isSafari;
  };
}();
var isFirefoxAndroid = function () {
  var isFirefoxAndroid = navigator.userAgent.indexOf('Firefox') !== -1 && navigator.userAgent.indexOf('Android') !== -1;
  return function () {
    return isFirefoxAndroid;
  };
}();
var getChromeVersion = function () {
  var match = navigator.userAgent.match(/.*Chrome\/([0-9]+)/);
  var value = match ? parseInt(match[1], 10) : null;
  return function () {
    return value;
  };
}();
var isSafariWithoutDeviceMotion = function () {
  var value = false;
  value = isIOS() && isSafari() && navigator.userAgent.indexOf('13_4') !== -1;
  return function () {
    return value;
  };
}();
var isChromeWithoutDeviceMotion = function () {
  var value = false;
  if (getChromeVersion() === 65) {
    var match = navigator.userAgent.match(/.*Chrome\/([0-9\.]*)/);
    if (match) {
      var _match$1$split = match[1].split('.'),
          _match$1$split2 = slicedToArray(_match$1$split, 4),
          major = _match$1$split2[0],
          minor = _match$1$split2[1],
          branch = _match$1$split2[2],
          build = _match$1$split2[3];
      value = parseInt(branch, 10) === 3325 && parseInt(build, 10) < 148;
    }
  }
  return function () {
    return value;
  };
}();
var isR7 = function () {
  var isR7 = navigator.userAgent.indexOf('R7 Build') !== -1;
  return function () {
    return isR7;
  };
}();
var isLandscapeMode = function isLandscapeMode() {
  var rtn = window.orientation == 90 || window.orientation == -90;
  return isR7() ? !rtn : rtn;
};
var isTimestampDeltaValid = function isTimestampDeltaValid(timestampDeltaS) {
  if (isNaN(timestampDeltaS)) {
    return false;
  }
  if (timestampDeltaS <= MIN_TIMESTEP) {
    return false;
  }
  if (timestampDeltaS > MAX_TIMESTEP) {
    return false;
  }
  return true;
};
var getScreenWidth = function getScreenWidth() {
  return Math.max(window.screen.width, window.screen.height) * window.devicePixelRatio;
};
var getScreenHeight = function getScreenHeight() {
  return Math.min(window.screen.width, window.screen.height) * window.devicePixelRatio;
};
var requestFullscreen = function requestFullscreen(element) {
  if (isWebViewAndroid()) {
    return false;
  }
  if (element.requestFullscreen) {
    element.requestFullscreen();
  } else if (element.webkitRequestFullscreen) {
    element.webkitRequestFullscreen();
  } else if (element.mozRequestFullScreen) {
    element.mozRequestFullScreen();
  } else if (element.msRequestFullscreen) {
    element.msRequestFullscreen();
  } else {
    return false;
  }
  return true;
};
var exitFullscreen = function exitFullscreen() {
  if (document.exitFullscreen) {
    document.exitFullscreen();
  } else if (document.webkitExitFullscreen) {
    document.webkitExitFullscreen();
  } else if (document.mozCancelFullScreen) {
    document.mozCancelFullScreen();
  } else if (document.msExitFullscreen) {
    document.msExitFullscreen();
  } else {
    return false;
  }
  return true;
};
var getFullscreenElement = function getFullscreenElement() {
  return document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement;
};
var linkProgram = function linkProgram(gl, vertexSource, fragmentSource, attribLocationMap) {
  var vertexShader = gl.createShader(gl.VERTEX_SHADER);
  gl.shaderSource(vertexShader, vertexSource);
  gl.compileShader(vertexShader);
  var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);
  gl.shaderSource(fragmentShader, fragmentSource);
  gl.compileShader(fragmentShader);
  var program = gl.createProgram();
  gl.attachShader(program, vertexShader);
  gl.attachShader(program, fragmentShader);
  for (var attribName in attribLocationMap) {
    gl.bindAttribLocation(program, attribLocationMap[attribName], attribName);
  }gl.linkProgram(program);
  gl.deleteShader(vertexShader);
  gl.deleteShader(fragmentShader);
  return program;
};
var getProgramUniforms = function getProgramUniforms(gl, program) {
  var uniforms = {};
  var uniformCount = gl.getProgramParameter(program, gl.ACTIVE_UNIFORMS);
  var uniformName = '';
  for (var i = 0; i < uniformCount; i++) {
    var uniformInfo = gl.getActiveUniform(program, i);
    uniformName = uniformInfo.name.replace('[0]', '');
    uniforms[uniformName] = gl.getUniformLocation(program, uniformName);
  }
  return uniforms;
};
var orthoMatrix = function orthoMatrix(out, left, right, bottom, top, near, far) {
  var lr = 1 / (left - right),
      bt = 1 / (bottom - top),
      nf = 1 / (near - far);
  out[0] = -2 * lr;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 0;
  out[5] = -2 * bt;
  out[6] = 0;
  out[7] = 0;
  out[8] = 0;
  out[9] = 0;
  out[10] = 2 * nf;
  out[11] = 0;
  out[12] = (left + right) * lr;
  out[13] = (top + bottom) * bt;
  out[14] = (far + near) * nf;
  out[15] = 1;
  return out;
};
var isMobile = function isMobile() {
  var check = false;
  (function (a) {
    if (/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0, 4))) check = true;
  })(navigator.userAgent || navigator.vendor || window.opera);
  return check;
};
var extend = function extend(dest, src) {
  for (var key in src) {
    if (src.hasOwnProperty(key)) {
      dest[key] = src[key];
    }
  }
  return dest;
};
var safariCssSizeWorkaround = function safariCssSizeWorkaround(canvas) {
  if (isIOS()) {
    var width = canvas.style.width;
    var height = canvas.style.height;
    canvas.style.width = parseInt(width) + 1 + 'px';
    canvas.style.height = parseInt(height) + 'px';
    setTimeout(function () {
      canvas.style.width = width;
      canvas.style.height = height;
    }, 100);
  }
  window.canvas = canvas;
};
var frameDataFromPose = function () {
  var piOver180 = Math.PI / 180.0;
  var rad45 = Math.PI * 0.25;
  function mat4_perspectiveFromFieldOfView(out, fov, near, far) {
    var upTan = Math.tan(fov ? fov.upDegrees * piOver180 : rad45),
        downTan = Math.tan(fov ? fov.downDegrees * piOver180 : rad45),
        leftTan = Math.tan(fov ? fov.leftDegrees * piOver180 : rad45),
        rightTan = Math.tan(fov ? fov.rightDegrees * piOver180 : rad45),
        xScale = 2.0 / (leftTan + rightTan),
        yScale = 2.0 / (upTan + downTan);
    out[0] = xScale;
    out[1] = 0.0;
    out[2] = 0.0;
    out[3] = 0.0;
    out[4] = 0.0;
    out[5] = yScale;
    out[6] = 0.0;
    out[7] = 0.0;
    out[8] = -((leftTan - rightTan) * xScale * 0.5);
    out[9] = (upTan - downTan) * yScale * 0.5;
    out[10] = far / (near - far);
    out[11] = -1.0;
    out[12] = 0.0;
    out[13] = 0.0;
    out[14] = far * near / (near - far);
    out[15] = 0.0;
    return out;
  }
  function mat4_fromRotationTranslation(out, q, v) {
    var x = q[0],
        y = q[1],
        z = q[2],
        w = q[3],
        x2 = x + x,
        y2 = y + y,
        z2 = z + z,
        xx = x * x2,
        xy = x * y2,
        xz = x * z2,
        yy = y * y2,
        yz = y * z2,
        zz = z * z2,
        wx = w * x2,
        wy = w * y2,
        wz = w * z2;
    out[0] = 1 - (yy + zz);
    out[1] = xy + wz;
    out[2] = xz - wy;
    out[3] = 0;
    out[4] = xy - wz;
    out[5] = 1 - (xx + zz);
    out[6] = yz + wx;
    out[7] = 0;
    out[8] = xz + wy;
    out[9] = yz - wx;
    out[10] = 1 - (xx + yy);
    out[11] = 0;
    out[12] = v[0];
    out[13] = v[1];
    out[14] = v[2];
    out[15] = 1;
    return out;
  }
  function mat4_translate(out, a, v) {
    var x = v[0],
        y = v[1],
        z = v[2],
        a00,
        a01,
        a02,
        a03,
        a10,
        a11,
        a12,
        a13,
        a20,
        a21,
        a22,
        a23;
    if (a === out) {
      out[12] = a[0] * x + a[4] * y + a[8] * z + a[12];
      out[13] = a[1] * x + a[5] * y + a[9] * z + a[13];
      out[14] = a[2] * x + a[6] * y + a[10] * z + a[14];
      out[15] = a[3] * x + a[7] * y + a[11] * z + a[15];
    } else {
      a00 = a[0];a01 = a[1];a02 = a[2];a03 = a[3];
      a10 = a[4];a11 = a[5];a12 = a[6];a13 = a[7];
      a20 = a[8];a21 = a[9];a22 = a[10];a23 = a[11];
      out[0] = a00;out[1] = a01;out[2] = a02;out[3] = a03;
      out[4] = a10;out[5] = a11;out[6] = a12;out[7] = a13;
      out[8] = a20;out[9] = a21;out[10] = a22;out[11] = a23;
      out[12] = a00 * x + a10 * y + a20 * z + a[12];
      out[13] = a01 * x + a11 * y + a21 * z + a[13];
      out[14] = a02 * x + a12 * y + a22 * z + a[14];
      out[15] = a03 * x + a13 * y + a23 * z + a[15];
    }
    return out;
  }
  function mat4_invert(out, a) {
    var a00 = a[0],
        a01 = a[1],
        a02 = a[2],
        a03 = a[3],
        a10 = a[4],
        a11 = a[5],
        a12 = a[6],
        a13 = a[7],
        a20 = a[8],
        a21 = a[9],
        a22 = a[10],
        a23 = a[11],
        a30 = a[12],
        a31 = a[13],
        a32 = a[14],
        a33 = a[15],
        b00 = a00 * a11 - a01 * a10,
        b01 = a00 * a12 - a02 * a10,
        b02 = a00 * a13 - a03 * a10,
        b03 = a01 * a12 - a02 * a11,
        b04 = a01 * a13 - a03 * a11,
        b05 = a02 * a13 - a03 * a12,
        b06 = a20 * a31 - a21 * a30,
        b07 = a20 * a32 - a22 * a30,
        b08 = a20 * a33 - a23 * a30,
        b09 = a21 * a32 - a22 * a31,
        b10 = a21 * a33 - a23 * a31,
        b11 = a22 * a33 - a23 * a32,
    det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
    if (!det) {
      return null;
    }
    det = 1.0 / det;
    out[0] = (a11 * b11 - a12 * b10 + a13 * b09) * det;
    out[1] = (a02 * b10 - a01 * b11 - a03 * b09) * det;
    out[2] = (a31 * b05 - a32 * b04 + a33 * b03) * det;
    out[3] = (a22 * b04 - a21 * b05 - a23 * b03) * det;
    out[4] = (a12 * b08 - a10 * b11 - a13 * b07) * det;
    out[5] = (a00 * b11 - a02 * b08 + a03 * b07) * det;
    out[6] = (a32 * b02 - a30 * b05 - a33 * b01) * det;
    out[7] = (a20 * b05 - a22 * b02 + a23 * b01) * det;
    out[8] = (a10 * b10 - a11 * b08 + a13 * b06) * det;
    out[9] = (a01 * b08 - a00 * b10 - a03 * b06) * det;
    out[10] = (a30 * b04 - a31 * b02 + a33 * b00) * det;
    out[11] = (a21 * b02 - a20 * b04 - a23 * b00) * det;
    out[12] = (a11 * b07 - a10 * b09 - a12 * b06) * det;
    out[13] = (a00 * b09 - a01 * b07 + a02 * b06) * det;
    out[14] = (a31 * b01 - a30 * b03 - a32 * b00) * det;
    out[15] = (a20 * b03 - a21 * b01 + a22 * b00) * det;
    return out;
  }
  var defaultOrientation = new Float32Array([0, 0, 0, 1]);
  var defaultPosition = new Float32Array([0, 0, 0]);
  function updateEyeMatrices(projection, view, pose, fov, offset, vrDisplay) {
    mat4_perspectiveFromFieldOfView(projection, fov || null, vrDisplay.depthNear, vrDisplay.depthFar);
    var orientation = pose.orientation || defaultOrientation;
    var position = pose.position || defaultPosition;
    mat4_fromRotationTranslation(view, orientation, position);
    if (offset) mat4_translate(view, view, offset);
    mat4_invert(view, view);
  }
  return function (frameData, pose, vrDisplay) {
    if (!frameData || !pose) return false;
    frameData.pose = pose;
    frameData.timestamp = pose.timestamp;
    updateEyeMatrices(frameData.leftProjectionMatrix, frameData.leftViewMatrix, pose, vrDisplay._getFieldOfView("left"), vrDisplay._getEyeOffset("left"), vrDisplay);
    updateEyeMatrices(frameData.rightProjectionMatrix, frameData.rightViewMatrix, pose, vrDisplay._getFieldOfView("right"), vrDisplay._getEyeOffset("right"), vrDisplay);
    return true;
  };
}();
var isInsideCrossOriginIFrame = function isInsideCrossOriginIFrame() {
  var isFramed = window.self !== window.top;
  var refOrigin = getOriginFromUrl(document.referrer);
  var thisOrigin = getOriginFromUrl(window.location.href);
  return isFramed && refOrigin !== thisOrigin;
};
var getOriginFromUrl = function getOriginFromUrl(url) {
  var domainIdx;
  var protoSepIdx = url.indexOf("://");
  if (protoSepIdx !== -1) {
    domainIdx = protoSepIdx + 3;
  } else {
    domainIdx = 0;
  }
  var domainEndIdx = url.indexOf('/', domainIdx);
  if (domainEndIdx === -1) {
    domainEndIdx = url.length;
  }
  return url.substring(0, domainEndIdx);
};
var getQuaternionAngle = function getQuaternionAngle(quat) {
  if (quat.w > 1) {
    console.warn('getQuaternionAngle: w > 1');
    return 0;
  }
  var angle = 2 * Math.acos(quat.w);
  return angle;
};
var warnOnce = function () {
  var observedWarnings = {};
  return function (key, message) {
    if (observedWarnings[key] === undefined) {
      console.warn('webvr-polyfill: ' + message);
      observedWarnings[key] = true;
    }
  };
}();
var deprecateWarning = function deprecateWarning(deprecated, suggested) {
  var alternative = suggested ? 'Please use ' + suggested + ' instead.' : '';
  warnOnce(deprecated, deprecated + ' has been deprecated. ' + 'This may not work on native WebVR displays. ' + alternative);
};
function WGLUPreserveGLState(gl, bindings, callback) {
  if (!bindings) {
    callback(gl);
    return;
  }
  var boundValues = [];
  var activeTexture = null;
  for (var i = 0; i < bindings.length; ++i) {
    var binding = bindings[i];
    switch (binding) {
      case gl.TEXTURE_BINDING_2D:
      case gl.TEXTURE_BINDING_CUBE_MAP:
        var textureUnit = bindings[++i];
        if (textureUnit < gl.TEXTURE0 || textureUnit > gl.TEXTURE31) {
          console.error("TEXTURE_BINDING_2D or TEXTURE_BINDING_CUBE_MAP must be followed by a valid texture unit");
          boundValues.push(null, null);
          break;
        }
        if (!activeTexture) {
          activeTexture = gl.getParameter(gl.ACTIVE_TEXTURE);
        }
        gl.activeTexture(textureUnit);
        boundValues.push(gl.getParameter(binding), null);
        break;
      case gl.ACTIVE_TEXTURE:
        activeTexture = gl.getParameter(gl.ACTIVE_TEXTURE);
        boundValues.push(null);
        break;
      default:
        boundValues.push(gl.getParameter(binding));
        break;
    }
  }
  callback(gl);
  for (var i = 0; i < bindings.length; ++i) {
    var binding = bindings[i];
    var boundValue = boundValues[i];
    switch (binding) {
      case gl.ACTIVE_TEXTURE:
        break;
      case gl.ARRAY_BUFFER_BINDING:
        gl.bindBuffer(gl.ARRAY_BUFFER, boundValue);
        break;
      case gl.COLOR_CLEAR_VALUE:
        gl.clearColor(boundValue[0], boundValue[1], boundValue[2], boundValue[3]);
        break;
      case gl.COLOR_WRITEMASK:
        gl.colorMask(boundValue[0], boundValue[1], boundValue[2], boundValue[3]);
        break;
      case gl.CURRENT_PROGRAM:
        gl.useProgram(boundValue);
        break;
      case gl.ELEMENT_ARRAY_BUFFER_BINDING:
        gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, boundValue);
        break;
      case gl.FRAMEBUFFER_BINDING:
        gl.bindFramebuffer(gl.FRAMEBUFFER, boundValue);
        break;
      case gl.RENDERBUFFER_BINDING:
        gl.bindRenderbuffer(gl.RENDERBUFFER, boundValue);
        break;
      case gl.TEXTURE_BINDING_2D:
        var textureUnit = bindings[++i];
        if (textureUnit < gl.TEXTURE0 || textureUnit > gl.TEXTURE31)
          break;
        gl.activeTexture(textureUnit);
        gl.bindTexture(gl.TEXTURE_2D, boundValue);
        break;
      case gl.TEXTURE_BINDING_CUBE_MAP:
        var textureUnit = bindings[++i];
        if (textureUnit < gl.TEXTURE0 || textureUnit > gl.TEXTURE31)
          break;
        gl.activeTexture(textureUnit);
        gl.bindTexture(gl.TEXTURE_CUBE_MAP, boundValue);
        break;
      case gl.VIEWPORT:
        gl.viewport(boundValue[0], boundValue[1], boundValue[2], boundValue[3]);
        break;
      case gl.BLEND:
      case gl.CULL_FACE:
      case gl.DEPTH_TEST:
      case gl.SCISSOR_TEST:
      case gl.STENCIL_TEST:
        if (boundValue) {
          gl.enable(binding);
        } else {
          gl.disable(binding);
        }
        break;
      default:
        console.log("No GL restore behavior for 0x" + binding.toString(16));
        break;
    }
    if (activeTexture) {
      gl.activeTexture(activeTexture);
    }
  }
}
var glPreserveState = WGLUPreserveGLState;
var distortionVS = ['attribute vec2 position;', 'attribute vec3 texCoord;', 'varying vec2 vTexCoord;', 'uniform vec4 viewportOffsetScale[2];', 'void main() {', '  vec4 viewport = viewportOffsetScale[int(texCoord.z)];', '  vTexCoord = (texCoord.xy * viewport.zw) + viewport.xy;', '  gl_Position = vec4( position, 1.0, 1.0 );', '}'].join('\n');
var distortionFS = ['precision mediump float;', 'uniform sampler2D diffuse;', 'varying vec2 vTexCoord;', 'void main() {', '  gl_FragColor = texture2D(diffuse, vTexCoord);', '}'].join('\n');
function CardboardDistorter(gl, cardboardUI, bufferScale, dirtySubmitFrameBindings) {
  this.gl = gl;
  this.cardboardUI = cardboardUI;
  this.bufferScale = bufferScale;
  this.dirtySubmitFrameBindings = dirtySubmitFrameBindings;
  this.ctxAttribs = gl.getContextAttributes();
  this.instanceExt = gl.getExtension('ANGLE_instanced_arrays');
  this.meshWidth = 20;
  this.meshHeight = 20;
  this.bufferWidth = gl.drawingBufferWidth;
  this.bufferHeight = gl.drawingBufferHeight;
  this.realBindFramebuffer = gl.bindFramebuffer;
  this.realEnable = gl.enable;
  this.realDisable = gl.disable;
  this.realColorMask = gl.colorMask;
  this.realClearColor = gl.clearColor;
  this.realViewport = gl.viewport;
  if (!isIOS()) {
    this.realCanvasWidth = Object.getOwnPropertyDescriptor(gl.canvas.__proto__, 'width');
    this.realCanvasHeight = Object.getOwnPropertyDescriptor(gl.canvas.__proto__, 'height');
  }
  this.isPatched = false;
  this.lastBoundFramebuffer = null;
  this.cullFace = false;
  this.depthTest = false;
  this.blend = false;
  this.scissorTest = false;
  this.stencilTest = false;
  this.viewport = [0, 0, 0, 0];
  this.colorMask = [true, true, true, true];
  this.clearColor = [0, 0, 0, 0];
  this.attribs = {
    position: 0,
    texCoord: 1
  };
  this.program = linkProgram(gl, distortionVS, distortionFS, this.attribs);
  this.uniforms = getProgramUniforms(gl, this.program);
  this.viewportOffsetScale = new Float32Array(8);
  this.setTextureBounds();
  this.vertexBuffer = gl.createBuffer();
  this.indexBuffer = gl.createBuffer();
  this.indexCount = 0;
  this.renderTarget = gl.createTexture();
  this.framebuffer = gl.createFramebuffer();
  this.depthStencilBuffer = null;
  this.depthBuffer = null;
  this.stencilBuffer = null;
  if (this.ctxAttribs.depth && this.ctxAttribs.stencil) {
    this.depthStencilBuffer = gl.createRenderbuffer();
  } else if (this.ctxAttribs.depth) {
    this.depthBuffer = gl.createRenderbuffer();
  } else if (this.ctxAttribs.stencil) {
    this.stencilBuffer = gl.createRenderbuffer();
  }
  this.patch();
  this.onResize();
}
CardboardDistorter.prototype.destroy = function () {
  var gl = this.gl;
  this.unpatch();
  gl.deleteProgram(this.program);
  gl.deleteBuffer(this.vertexBuffer);
  gl.deleteBuffer(this.indexBuffer);
  gl.deleteTexture(this.renderTarget);
  gl.deleteFramebuffer(this.framebuffer);
  if (this.depthStencilBuffer) {
    gl.deleteRenderbuffer(this.depthStencilBuffer);
  }
  if (this.depthBuffer) {
    gl.deleteRenderbuffer(this.depthBuffer);
  }
  if (this.stencilBuffer) {
    gl.deleteRenderbuffer(this.stencilBuffer);
  }
  if (this.cardboardUI) {
    this.cardboardUI.destroy();
  }
};
CardboardDistorter.prototype.onResize = function () {
  var gl = this.gl;
  var self = this;
  var glState = [gl.RENDERBUFFER_BINDING, gl.TEXTURE_BINDING_2D, gl.TEXTURE0];
  glPreserveState(gl, glState, function (gl) {
    self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, null);
    if (self.scissorTest) {
      self.realDisable.call(gl, gl.SCISSOR_TEST);
    }
    self.realColorMask.call(gl, true, true, true, true);
    self.realViewport.call(gl, 0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
    self.realClearColor.call(gl, 0, 0, 0, 1);
    gl.clear(gl.COLOR_BUFFER_BIT);
    self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, self.framebuffer);
    gl.bindTexture(gl.TEXTURE_2D, self.renderTarget);
    gl.texImage2D(gl.TEXTURE_2D, 0, self.ctxAttribs.alpha ? gl.RGBA : gl.RGB, self.bufferWidth, self.bufferHeight, 0, self.ctxAttribs.alpha ? gl.RGBA : gl.RGB, gl.UNSIGNED_BYTE, null);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
    gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, self.renderTarget, 0);
    if (self.ctxAttribs.depth && self.ctxAttribs.stencil) {
      gl.bindRenderbuffer(gl.RENDERBUFFER, self.depthStencilBuffer);
      gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_STENCIL, self.bufferWidth, self.bufferHeight);
      gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.RENDERBUFFER, self.depthStencilBuffer);
    } else if (self.ctxAttribs.depth) {
      gl.bindRenderbuffer(gl.RENDERBUFFER, self.depthBuffer);
      gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, self.bufferWidth, self.bufferHeight);
      gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, self.depthBuffer);
    } else if (self.ctxAttribs.stencil) {
      gl.bindRenderbuffer(gl.RENDERBUFFER, self.stencilBuffer);
      gl.renderbufferStorage(gl.RENDERBUFFER, gl.STENCIL_INDEX8, self.bufferWidth, self.bufferHeight);
      gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.RENDERBUFFER, self.stencilBuffer);
    }
    if (!gl.checkFramebufferStatus(gl.FRAMEBUFFER) === gl.FRAMEBUFFER_COMPLETE) {
      console.error('Framebuffer incomplete!');
    }
    self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, self.lastBoundFramebuffer);
    if (self.scissorTest) {
      self.realEnable.call(gl, gl.SCISSOR_TEST);
    }
    self.realColorMask.apply(gl, self.colorMask);
    self.realViewport.apply(gl, self.viewport);
    self.realClearColor.apply(gl, self.clearColor);
  });
  if (this.cardboardUI) {
    this.cardboardUI.onResize();
  }
};
CardboardDistorter.prototype.patch = function () {
  if (this.isPatched) {
    return;
  }
  var self = this;
  var canvas = this.gl.canvas;
  var gl = this.gl;
  if (!isIOS()) {
    canvas.width = getScreenWidth() * this.bufferScale;
    canvas.height = getScreenHeight() * this.bufferScale;
    Object.defineProperty(canvas, 'width', {
      configurable: true,
      enumerable: true,
      get: function get() {
        return self.bufferWidth;
      },
      set: function set(value) {
        self.bufferWidth = value;
        self.realCanvasWidth.set.call(canvas, value);
        self.onResize();
      }
    });
    Object.defineProperty(canvas, 'height', {
      configurable: true,
      enumerable: true,
      get: function get() {
        return self.bufferHeight;
      },
      set: function set(value) {
        self.bufferHeight = value;
        self.realCanvasHeight.set.call(canvas, value);
        self.onResize();
      }
    });
  }
  this.lastBoundFramebuffer = gl.getParameter(gl.FRAMEBUFFER_BINDING);
  if (this.lastBoundFramebuffer == null) {
    this.lastBoundFramebuffer = this.framebuffer;
    this.gl.bindFramebuffer(gl.FRAMEBUFFER, this.framebuffer);
  }
  this.gl.bindFramebuffer = function (target, framebuffer) {
    self.lastBoundFramebuffer = framebuffer ? framebuffer : self.framebuffer;
    self.realBindFramebuffer.call(gl, target, self.lastBoundFramebuffer);
  };
  this.cullFace = gl.getParameter(gl.CULL_FACE);
  this.depthTest = gl.getParameter(gl.DEPTH_TEST);
  this.blend = gl.getParameter(gl.BLEND);
  this.scissorTest = gl.getParameter(gl.SCISSOR_TEST);
  this.stencilTest = gl.getParameter(gl.STENCIL_TEST);
  gl.enable = function (pname) {
    switch (pname) {
      case gl.CULL_FACE:
        self.cullFace = true;break;
      case gl.DEPTH_TEST:
        self.depthTest = true;break;
      case gl.BLEND:
        self.blend = true;break;
      case gl.SCISSOR_TEST:
        self.scissorTest = true;break;
      case gl.STENCIL_TEST:
        self.stencilTest = true;break;
    }
    self.realEnable.call(gl, pname);
  };
  gl.disable = function (pname) {
    switch (pname) {
      case gl.CULL_FACE:
        self.cullFace = false;break;
      case gl.DEPTH_TEST:
        self.depthTest = false;break;
      case gl.BLEND:
        self.blend = false;break;
      case gl.SCISSOR_TEST:
        self.scissorTest = false;break;
      case gl.STENCIL_TEST:
        self.stencilTest = false;break;
    }
    self.realDisable.call(gl, pname);
  };
  this.colorMask = gl.getParameter(gl.COLOR_WRITEMASK);
  gl.colorMask = function (r, g, b, a) {
    self.colorMask[0] = r;
    self.colorMask[1] = g;
    self.colorMask[2] = b;
    self.colorMask[3] = a;
    self.realColorMask.call(gl, r, g, b, a);
  };
  this.clearColor = gl.getParameter(gl.COLOR_CLEAR_VALUE);
  gl.clearColor = function (r, g, b, a) {
    self.clearColor[0] = r;
    self.clearColor[1] = g;
    self.clearColor[2] = b;
    self.clearColor[3] = a;
    self.realClearColor.call(gl, r, g, b, a);
  };
  this.viewport = gl.getParameter(gl.VIEWPORT);
  gl.viewport = function (x, y, w, h) {
    self.viewport[0] = x;
    self.viewport[1] = y;
    self.viewport[2] = w;
    self.viewport[3] = h;
    self.realViewport.call(gl, x, y, w, h);
  };
  this.isPatched = true;
  safariCssSizeWorkaround(canvas);
};
CardboardDistorter.prototype.unpatch = function () {
  if (!this.isPatched) {
    return;
  }
  var gl = this.gl;
  var canvas = this.gl.canvas;
  if (!isIOS()) {
    Object.defineProperty(canvas, 'width', this.realCanvasWidth);
    Object.defineProperty(canvas, 'height', this.realCanvasHeight);
  }
  canvas.width = this.bufferWidth;
  canvas.height = this.bufferHeight;
  gl.bindFramebuffer = this.realBindFramebuffer;
  gl.enable = this.realEnable;
  gl.disable = this.realDisable;
  gl.colorMask = this.realColorMask;
  gl.clearColor = this.realClearColor;
  gl.viewport = this.realViewport;
  if (this.lastBoundFramebuffer == this.framebuffer) {
    gl.bindFramebuffer(gl.FRAMEBUFFER, null);
  }
  this.isPatched = false;
  setTimeout(function () {
    safariCssSizeWorkaround(canvas);
  }, 1);
};
CardboardDistorter.prototype.setTextureBounds = function (leftBounds, rightBounds) {
  if (!leftBounds) {
    leftBounds = [0, 0, 0.5, 1];
  }
  if (!rightBounds) {
    rightBounds = [0.5, 0, 0.5, 1];
  }
  this.viewportOffsetScale[0] = leftBounds[0];
  this.viewportOffsetScale[1] = leftBounds[1];
  this.viewportOffsetScale[2] = leftBounds[2];
  this.viewportOffsetScale[3] = leftBounds[3];
  this.viewportOffsetScale[4] = rightBounds[0];
  this.viewportOffsetScale[5] = rightBounds[1];
  this.viewportOffsetScale[6] = rightBounds[2];
  this.viewportOffsetScale[7] = rightBounds[3];
};
CardboardDistorter.prototype.submitFrame = function () {
  var gl = this.gl;
  var self = this;
  var glState = [];
  if (!this.dirtySubmitFrameBindings) {
    glState.push(gl.CURRENT_PROGRAM, gl.ARRAY_BUFFER_BINDING, gl.ELEMENT_ARRAY_BUFFER_BINDING, gl.TEXTURE_BINDING_2D, gl.TEXTURE0);
  }
  glPreserveState(gl, glState, function (gl) {
    self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, null);
    var positionDivisor = 0;
    var texCoordDivisor = 0;
    if (self.instanceExt) {
      positionDivisor = gl.getVertexAttrib(self.attribs.position, self.instanceExt.VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE);
      texCoordDivisor = gl.getVertexAttrib(self.attribs.texCoord, self.instanceExt.VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE);
    }
    if (self.cullFace) {
      self.realDisable.call(gl, gl.CULL_FACE);
    }
    if (self.depthTest) {
      self.realDisable.call(gl, gl.DEPTH_TEST);
    }
    if (self.blend) {
      self.realDisable.call(gl, gl.BLEND);
    }
    if (self.scissorTest) {
      self.realDisable.call(gl, gl.SCISSOR_TEST);
    }
    if (self.stencilTest) {
      self.realDisable.call(gl, gl.STENCIL_TEST);
    }
    self.realColorMask.call(gl, true, true, true, true);
    self.realViewport.call(gl, 0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
    if (self.ctxAttribs.alpha || isIOS()) {
      self.realClearColor.call(gl, 0, 0, 0, 1);
      gl.clear(gl.COLOR_BUFFER_BIT);
    }
    gl.useProgram(self.program);
    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, self.indexBuffer);
    gl.bindBuffer(gl.ARRAY_BUFFER, self.vertexBuffer);
    gl.enableVertexAttribArray(self.attribs.position);
    gl.enableVertexAttribArray(self.attribs.texCoord);
    gl.vertexAttribPointer(self.attribs.position, 2, gl.FLOAT, false, 20, 0);
    gl.vertexAttribPointer(self.attribs.texCoord, 3, gl.FLOAT, false, 20, 8);
    if (self.instanceExt) {
      if (positionDivisor != 0) {
        self.instanceExt.vertexAttribDivisorANGLE(self.attribs.position, 0);
      }
      if (texCoordDivisor != 0) {
        self.instanceExt.vertexAttribDivisorANGLE(self.attribs.texCoord, 0);
      }
    }
    gl.activeTexture(gl.TEXTURE0);
    gl.uniform1i(self.uniforms.diffuse, 0);
    gl.bindTexture(gl.TEXTURE_2D, self.renderTarget);
    gl.uniform4fv(self.uniforms.viewportOffsetScale, self.viewportOffsetScale);
    gl.drawElements(gl.TRIANGLES, self.indexCount, gl.UNSIGNED_SHORT, 0);
    if (self.cardboardUI) {
      self.cardboardUI.renderNoState();
    }
    self.realBindFramebuffer.call(self.gl, gl.FRAMEBUFFER, self.framebuffer);
    if (!self.ctxAttribs.preserveDrawingBuffer) {
      self.realClearColor.call(gl, 0, 0, 0, 0);
      gl.clear(gl.COLOR_BUFFER_BIT);
    }
    if (!self.dirtySubmitFrameBindings) {
      self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, self.lastBoundFramebuffer);
    }
    if (self.cullFace) {
      self.realEnable.call(gl, gl.CULL_FACE);
    }
    if (self.depthTest) {
      self.realEnable.call(gl, gl.DEPTH_TEST);
    }
    if (self.blend) {
      self.realEnable.call(gl, gl.BLEND);
    }
    if (self.scissorTest) {
      self.realEnable.call(gl, gl.SCISSOR_TEST);
    }
    if (self.stencilTest) {
      self.realEnable.call(gl, gl.STENCIL_TEST);
    }
    self.realColorMask.apply(gl, self.colorMask);
    self.realViewport.apply(gl, self.viewport);
    if (self.ctxAttribs.alpha || !self.ctxAttribs.preserveDrawingBuffer) {
      self.realClearColor.apply(gl, self.clearColor);
    }
    if (self.instanceExt) {
      if (positionDivisor != 0) {
        self.instanceExt.vertexAttribDivisorANGLE(self.attribs.position, positionDivisor);
      }
      if (texCoordDivisor != 0) {
        self.instanceExt.vertexAttribDivisorANGLE(self.attribs.texCoord, texCoordDivisor);
      }
    }
  });
  if (isIOS()) {
    var canvas = gl.canvas;
    if (canvas.width != self.bufferWidth || canvas.height != self.bufferHeight) {
      self.bufferWidth = canvas.width;
      self.bufferHeight = canvas.height;
      self.onResize();
    }
  }
};
CardboardDistorter.prototype.updateDeviceInfo = function (deviceInfo) {
  var gl = this.gl;
  var self = this;
  var glState = [gl.ARRAY_BUFFER_BINDING, gl.ELEMENT_ARRAY_BUFFER_BINDING];
  glPreserveState(gl, glState, function (gl) {
    var vertices = self.computeMeshVertices_(self.meshWidth, self.meshHeight, deviceInfo);
    gl.bindBuffer(gl.ARRAY_BUFFER, self.vertexBuffer);
    gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);
    if (!self.indexCount) {
      var indices = self.computeMeshIndices_(self.meshWidth, self.meshHeight);
      gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, self.indexBuffer);
      gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.STATIC_DRAW);
      self.indexCount = indices.length;
    }
  });
};
CardboardDistorter.prototype.computeMeshVertices_ = function (width, height, deviceInfo) {
  var vertices = new Float32Array(2 * width * height * 5);
  var lensFrustum = deviceInfo.getLeftEyeVisibleTanAngles();
  var noLensFrustum = deviceInfo.getLeftEyeNoLensTanAngles();
  var viewport = deviceInfo.getLeftEyeVisibleScreenRect(noLensFrustum);
  var vidx = 0;
  for (var e = 0; e < 2; e++) {
    for (var j = 0; j < height; j++) {
      for (var i = 0; i < width; i++, vidx++) {
        var u = i / (width - 1);
        var v = j / (height - 1);
        var s = u;
        var t = v;
        var x = lerp(lensFrustum[0], lensFrustum[2], u);
        var y = lerp(lensFrustum[3], lensFrustum[1], v);
        var d = Math.sqrt(x * x + y * y);
        var r = deviceInfo.distortion.distortInverse(d);
        var p = x * r / d;
        var q = y * r / d;
        u = (p - noLensFrustum[0]) / (noLensFrustum[2] - noLensFrustum[0]);
        v = (q - noLensFrustum[3]) / (noLensFrustum[1] - noLensFrustum[3]);
        u = (viewport.x + u * viewport.width - 0.5) * 2.0;
        v = (viewport.y + v * viewport.height - 0.5) * 2.0;
        vertices[vidx * 5 + 0] = u;
        vertices[vidx * 5 + 1] = v;
        vertices[vidx * 5 + 2] = s;
        vertices[vidx * 5 + 3] = t;
        vertices[vidx * 5 + 4] = e;
      }
    }
    var w = lensFrustum[2] - lensFrustum[0];
    lensFrustum[0] = -(w + lensFrustum[0]);
    lensFrustum[2] = w - lensFrustum[2];
    w = noLensFrustum[2] - noLensFrustum[0];
    noLensFrustum[0] = -(w + noLensFrustum[0]);
    noLensFrustum[2] = w - noLensFrustum[2];
    viewport.x = 1 - (viewport.x + viewport.width);
  }
  return vertices;
};
CardboardDistorter.prototype.computeMeshIndices_ = function (width, height) {
  var indices = new Uint16Array(2 * (width - 1) * (height - 1) * 6);
  var halfwidth = width / 2;
  var halfheight = height / 2;
  var vidx = 0;
  var iidx = 0;
  for (var e = 0; e < 2; e++) {
    for (var j = 0; j < height; j++) {
      for (var i = 0; i < width; i++, vidx++) {
        if (i == 0 || j == 0) continue;
        if (i <= halfwidth == j <= halfheight) {
          indices[iidx++] = vidx;
          indices[iidx++] = vidx - width - 1;
          indices[iidx++] = vidx - width;
          indices[iidx++] = vidx - width - 1;
          indices[iidx++] = vidx;
          indices[iidx++] = vidx - 1;
        } else {
          indices[iidx++] = vidx - 1;
          indices[iidx++] = vidx - width;
          indices[iidx++] = vidx;
          indices[iidx++] = vidx - width;
          indices[iidx++] = vidx - 1;
          indices[iidx++] = vidx - width - 1;
        }
      }
    }
  }
  return indices;
};
CardboardDistorter.prototype.getOwnPropertyDescriptor_ = function (proto, attrName) {
  var descriptor = Object.getOwnPropertyDescriptor(proto, attrName);
  if (descriptor.get === undefined || descriptor.set === undefined) {
    descriptor.configurable = true;
    descriptor.enumerable = true;
    descriptor.get = function () {
      return this.getAttribute(attrName);
    };
    descriptor.set = function (val) {
      this.setAttribute(attrName, val);
    };
  }
  return descriptor;
};
var uiVS = ['attribute vec2 position;', 'uniform mat4 projectionMat;', 'void main() {', '  gl_Position = projectionMat * vec4( position, -1.0, 1.0 );', '}'].join('\n');
var uiFS = ['precision mediump float;', 'uniform vec4 color;', 'void main() {', '  gl_FragColor = color;', '}'].join('\n');
var DEG2RAD = Math.PI / 180.0;
var kAnglePerGearSection = 60;
var kOuterRimEndAngle = 12;
var kInnerRimBeginAngle = 20;
var kOuterRadius = 1;
var kMiddleRadius = 0.75;
var kInnerRadius = 0.3125;
var kCenterLineThicknessDp = 4;
var kButtonWidthDp = 28;
var kTouchSlopFactor = 1.5;
function CardboardUI(gl) {
  this.gl = gl;
  this.attribs = {
    position: 0
  };
  this.program = linkProgram(gl, uiVS, uiFS, this.attribs);
  this.uniforms = getProgramUniforms(gl, this.program);
  this.vertexBuffer = gl.createBuffer();
  this.gearOffset = 0;
  this.gearVertexCount = 0;
  this.arrowOffset = 0;
  this.arrowVertexCount = 0;
  this.projMat = new Float32Array(16);
  this.listener = null;
  this.onResize();
}
CardboardUI.prototype.destroy = function () {
  var gl = this.gl;
  if (this.listener) {
    gl.canvas.removeEventListener('click', this.listener, false);
  }
  gl.deleteProgram(this.program);
  gl.deleteBuffer(this.vertexBuffer);
};
CardboardUI.prototype.listen = function (optionsCallback, backCallback) {
  var canvas = this.gl.canvas;
  this.listener = function (event) {
    var midline = canvas.clientWidth / 2;
    var buttonSize = kButtonWidthDp * kTouchSlopFactor;
    if (event.clientX > midline - buttonSize && event.clientX < midline + buttonSize && event.clientY > canvas.clientHeight - buttonSize) {
      optionsCallback(event);
    }
    else if (event.clientX < buttonSize && event.clientY < buttonSize) {
        backCallback(event);
      }
  };
  canvas.addEventListener('click', this.listener, false);
};
CardboardUI.prototype.onResize = function () {
  var gl = this.gl;
  var self = this;
  var glState = [gl.ARRAY_BUFFER_BINDING];
  glPreserveState(gl, glState, function (gl) {
    var vertices = [];
    var midline = gl.drawingBufferWidth / 2;
    var physicalPixels = Math.max(screen.width, screen.height) * window.devicePixelRatio;
    var scalingRatio = gl.drawingBufferWidth / physicalPixels;
    var dps = scalingRatio * window.devicePixelRatio;
    var lineWidth = kCenterLineThicknessDp * dps / 2;
    var buttonSize = kButtonWidthDp * kTouchSlopFactor * dps;
    var buttonScale = kButtonWidthDp * dps / 2;
    var buttonBorder = (kButtonWidthDp * kTouchSlopFactor - kButtonWidthDp) * dps;
    vertices.push(midline - lineWidth, buttonSize);
    vertices.push(midline - lineWidth, gl.drawingBufferHeight);
    vertices.push(midline + lineWidth, buttonSize);
    vertices.push(midline + lineWidth, gl.drawingBufferHeight);
    self.gearOffset = vertices.length / 2;
    function addGearSegment(theta, r) {
      var angle = (90 - theta) * DEG2RAD;
      var x = Math.cos(angle);
      var y = Math.sin(angle);
      vertices.push(kInnerRadius * x * buttonScale + midline, kInnerRadius * y * buttonScale + buttonScale);
      vertices.push(r * x * buttonScale + midline, r * y * buttonScale + buttonScale);
    }
    for (var i = 0; i <= 6; i++) {
      var segmentTheta = i * kAnglePerGearSection;
      addGearSegment(segmentTheta, kOuterRadius);
      addGearSegment(segmentTheta + kOuterRimEndAngle, kOuterRadius);
      addGearSegment(segmentTheta + kInnerRimBeginAngle, kMiddleRadius);
      addGearSegment(segmentTheta + (kAnglePerGearSection - kInnerRimBeginAngle), kMiddleRadius);
      addGearSegment(segmentTheta + (kAnglePerGearSection - kOuterRimEndAngle), kOuterRadius);
    }
    self.gearVertexCount = vertices.length / 2 - self.gearOffset;
    self.arrowOffset = vertices.length / 2;
    function addArrowVertex(x, y) {
      vertices.push(buttonBorder + x, gl.drawingBufferHeight - buttonBorder - y);
    }
    var angledLineWidth = lineWidth / Math.sin(45 * DEG2RAD);
    addArrowVertex(0, buttonScale);
    addArrowVertex(buttonScale, 0);
    addArrowVertex(buttonScale + angledLineWidth, angledLineWidth);
    addArrowVertex(angledLineWidth, buttonScale + angledLineWidth);
    addArrowVertex(angledLineWidth, buttonScale - angledLineWidth);
    addArrowVertex(0, buttonScale);
    addArrowVertex(buttonScale, buttonScale * 2);
    addArrowVertex(buttonScale + angledLineWidth, buttonScale * 2 - angledLineWidth);
    addArrowVertex(angledLineWidth, buttonScale - angledLineWidth);
    addArrowVertex(0, buttonScale);
    addArrowVertex(angledLineWidth, buttonScale - lineWidth);
    addArrowVertex(kButtonWidthDp * dps, buttonScale - lineWidth);
    addArrowVertex(angledLineWidth, buttonScale + lineWidth);
    addArrowVertex(kButtonWidthDp * dps, buttonScale + lineWidth);
    self.arrowVertexCount = vertices.length / 2 - self.arrowOffset;
    gl.bindBuffer(gl.ARRAY_BUFFER, self.vertexBuffer);
    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertices), gl.STATIC_DRAW);
  });
};
CardboardUI.prototype.render = function () {
  var gl = this.gl;
  var self = this;
  var glState = [gl.CULL_FACE, gl.DEPTH_TEST, gl.BLEND, gl.SCISSOR_TEST, gl.STENCIL_TEST, gl.COLOR_WRITEMASK, gl.VIEWPORT, gl.CURRENT_PROGRAM, gl.ARRAY_BUFFER_BINDING];
  glPreserveState(gl, glState, function (gl) {
    gl.disable(gl.CULL_FACE);
    gl.disable(gl.DEPTH_TEST);
    gl.disable(gl.BLEND);
    gl.disable(gl.SCISSOR_TEST);
    gl.disable(gl.STENCIL_TEST);
    gl.colorMask(true, true, true, true);
    gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
    self.renderNoState();
  });
};
CardboardUI.prototype.renderNoState = function () {
  var gl = this.gl;
  gl.useProgram(this.program);
  gl.bindBuffer(gl.ARRAY_BUFFER, this.vertexBuffer);
  gl.enableVertexAttribArray(this.attribs.position);
  gl.vertexAttribPointer(this.attribs.position, 2, gl.FLOAT, false, 8, 0);
  gl.uniform4f(this.uniforms.color, 1.0, 1.0, 1.0, 1.0);
  orthoMatrix(this.projMat, 0, gl.drawingBufferWidth, 0, gl.drawingBufferHeight, 0.1, 1024.0);
  gl.uniformMatrix4fv(this.uniforms.projectionMat, false, this.projMat);
  gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
  gl.drawArrays(gl.TRIANGLE_STRIP, this.gearOffset, this.gearVertexCount);
  gl.drawArrays(gl.TRIANGLE_STRIP, this.arrowOffset, this.arrowVertexCount);
};
function Distortion(coefficients) {
  this.coefficients = coefficients;
}
Distortion.prototype.distortInverse = function (radius) {
  var r0 = 0;
  var r1 = 1;
  var dr0 = radius - this.distort(r0);
  while (Math.abs(r1 - r0) > 0.0001             ) {
    var dr1 = radius - this.distort(r1);
    var r2 = r1 - dr1 * ((r1 - r0) / (dr1 - dr0));
    r0 = r1;
    r1 = r2;
    dr0 = dr1;
  }
  return r1;
};
Distortion.prototype.distort = function (radius) {
  var r2 = radius * radius;
  var ret = 0;
  for (var i = 0; i < this.coefficients.length; i++) {
    ret = r2 * (ret + this.coefficients[i]);
  }
  return (ret + 1) * radius;
};
var degToRad = Math.PI / 180;
var radToDeg = 180 / Math.PI;
var Vector3 = function Vector3(x, y, z) {
  this.x = x || 0;
  this.y = y || 0;
  this.z = z || 0;
};
Vector3.prototype = {
  constructor: Vector3,
  set: function set(x, y, z) {
    this.x = x;
    this.y = y;
    this.z = z;
    return this;
  },
  copy: function copy(v) {
    this.x = v.x;
    this.y = v.y;
    this.z = v.z;
    return this;
  },
  length: function length() {
    return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);
  },
  normalize: function normalize() {
    var scalar = this.length();
    if (scalar !== 0) {
      var invScalar = 1 / scalar;
      this.multiplyScalar(invScalar);
    } else {
      this.x = 0;
      this.y = 0;
      this.z = 0;
    }
    return this;
  },
  multiplyScalar: function multiplyScalar(scalar) {
    this.x *= scalar;
    this.y *= scalar;
    this.z *= scalar;
  },
  applyQuaternion: function applyQuaternion(q) {
    var x = this.x;
    var y = this.y;
    var z = this.z;
    var qx = q.x;
    var qy = q.y;
    var qz = q.z;
    var qw = q.w;
    var ix = qw * x + qy * z - qz * y;
    var iy = qw * y + qz * x - qx * z;
    var iz = qw * z + qx * y - qy * x;
    var iw = -qx * x - qy * y - qz * z;
    this.x = ix * qw + iw * -qx + iy * -qz - iz * -qy;
    this.y = iy * qw + iw * -qy + iz * -qx - ix * -qz;
    this.z = iz * qw + iw * -qz + ix * -qy - iy * -qx;
    return this;
  },
  dot: function dot(v) {
    return this.x * v.x + this.y * v.y + this.z * v.z;
  },
  crossVectors: function crossVectors(a, b) {
    var ax = a.x,
        ay = a.y,
        az = a.z;
    var bx = b.x,
        by = b.y,
        bz = b.z;
    this.x = ay * bz - az * by;
    this.y = az * bx - ax * bz;
    this.z = ax * by - ay * bx;
    return this;
  }
};
var Quaternion = function Quaternion(x, y, z, w) {
  this.x = x || 0;
  this.y = y || 0;
  this.z = z || 0;
  this.w = w !== undefined ? w : 1;
};
Quaternion.prototype = {
  constructor: Quaternion,
  set: function set(x, y, z, w) {
    this.x = x;
    this.y = y;
    this.z = z;
    this.w = w;
    return this;
  },
  copy: function copy(quaternion) {
    this.x = quaternion.x;
    this.y = quaternion.y;
    this.z = quaternion.z;
    this.w = quaternion.w;
    return this;
  },
  setFromEulerXYZ: function setFromEulerXYZ(x, y, z) {
    var c1 = Math.cos(x / 2);
    var c2 = Math.cos(y / 2);
    var c3 = Math.cos(z / 2);
    var s1 = Math.sin(x / 2);
    var s2 = Math.sin(y / 2);
    var s3 = Math.sin(z / 2);
    this.x = s1 * c2 * c3 + c1 * s2 * s3;
    this.y = c1 * s2 * c3 - s1 * c2 * s3;
    this.z = c1 * c2 * s3 + s1 * s2 * c3;
    this.w = c1 * c2 * c3 - s1 * s2 * s3;
    return this;
  },
  setFromEulerYXZ: function setFromEulerYXZ(x, y, z) {
    var c1 = Math.cos(x / 2);
    var c2 = Math.cos(y / 2);
    var c3 = Math.cos(z / 2);
    var s1 = Math.sin(x / 2);
    var s2 = Math.sin(y / 2);
    var s3 = Math.sin(z / 2);
    this.x = s1 * c2 * c3 + c1 * s2 * s3;
    this.y = c1 * s2 * c3 - s1 * c2 * s3;
    this.z = c1 * c2 * s3 - s1 * s2 * c3;
    this.w = c1 * c2 * c3 + s1 * s2 * s3;
    return this;
  },
  setFromAxisAngle: function setFromAxisAngle(axis, angle) {
    var halfAngle = angle / 2,
        s = Math.sin(halfAngle);
    this.x = axis.x * s;
    this.y = axis.y * s;
    this.z = axis.z * s;
    this.w = Math.cos(halfAngle);
    return this;
  },
  multiply: function multiply(q) {
    return this.multiplyQuaternions(this, q);
  },
  multiplyQuaternions: function multiplyQuaternions(a, b) {
    var qax = a.x,
        qay = a.y,
        qaz = a.z,
        qaw = a.w;
    var qbx = b.x,
        qby = b.y,
        qbz = b.z,
        qbw = b.w;
    this.x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;
    this.y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;
    this.z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;
    this.w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;
    return this;
  },
  inverse: function inverse() {
    this.x *= -1;
    this.y *= -1;
    this.z *= -1;
    this.normalize();
    return this;
  },
  normalize: function normalize() {
    var l = Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w);
    if (l === 0) {
      this.x = 0;
      this.y = 0;
      this.z = 0;
      this.w = 1;
    } else {
      l = 1 / l;
      this.x = this.x * l;
      this.y = this.y * l;
      this.z = this.z * l;
      this.w = this.w * l;
    }
    return this;
  },
  slerp: function slerp(qb, t) {
    if (t === 0) return this;
    if (t === 1) return this.copy(qb);
    var x = this.x,
        y = this.y,
        z = this.z,
        w = this.w;
    var cosHalfTheta = w * qb.w + x * qb.x + y * qb.y + z * qb.z;
    if (cosHalfTheta < 0) {
      this.w = -qb.w;
      this.x = -qb.x;
      this.y = -qb.y;
      this.z = -qb.z;
      cosHalfTheta = -cosHalfTheta;
    } else {
      this.copy(qb);
    }
    if (cosHalfTheta >= 1.0) {
      this.w = w;
      this.x = x;
      this.y = y;
      this.z = z;
      return this;
    }
    var halfTheta = Math.acos(cosHalfTheta);
    var sinHalfTheta = Math.sqrt(1.0 - cosHalfTheta * cosHalfTheta);
    if (Math.abs(sinHalfTheta) < 0.001) {
      this.w = 0.5 * (w + this.w);
      this.x = 0.5 * (x + this.x);
      this.y = 0.5 * (y + this.y);
      this.z = 0.5 * (z + this.z);
      return this;
    }
    var ratioA = Math.sin((1 - t) * halfTheta) / sinHalfTheta,
        ratioB = Math.sin(t * halfTheta) / sinHalfTheta;
    this.w = w * ratioA + this.w * ratioB;
    this.x = x * ratioA + this.x * ratioB;
    this.y = y * ratioA + this.y * ratioB;
    this.z = z * ratioA + this.z * ratioB;
    return this;
  },
  setFromUnitVectors: function () {
    var v1, r;
    var EPS = 0.000001;
    return function (vFrom, vTo) {
      if (v1 === undefined) v1 = new Vector3();
      r = vFrom.dot(vTo) + 1;
      if (r < EPS) {
        r = 0;
        if (Math.abs(vFrom.x) > Math.abs(vFrom.z)) {
          v1.set(-vFrom.y, vFrom.x, 0);
        } else {
          v1.set(0, -vFrom.z, vFrom.y);
        }
      } else {
        v1.crossVectors(vFrom, vTo);
      }
      this.x = v1.x;
      this.y = v1.y;
      this.z = v1.z;
      this.w = r;
      this.normalize();
      return this;
    };
  }()
};
function Device(params) {
  this.width = params.width || getScreenWidth();
  this.height = params.height || getScreenHeight();
  this.widthMeters = params.widthMeters;
  this.heightMeters = params.heightMeters;
  this.bevelMeters = params.bevelMeters;
}
var DEFAULT_ANDROID = new Device({
  widthMeters: 0.110,
  heightMeters: 0.062,
  bevelMeters: 0.004
});
var DEFAULT_IOS = new Device({
  widthMeters: 0.1038,
  heightMeters: 0.0584,
  bevelMeters: 0.004
});
var Viewers = {
  CardboardV1: new CardboardViewer({
    id: 'CardboardV1',
    label: 'Cardboard I/O 2014',
    fov: 40,
    interLensDistance: 0.060,
    baselineLensDistance: 0.035,
    screenLensDistance: 0.042,
    distortionCoefficients: [0.441, 0.156],
    inverseCoefficients: [-0.4410035, 0.42756155, -0.4804439, 0.5460139, -0.58821183, 0.5733938, -0.48303202, 0.33299083, -0.17573841, 0.0651772, -0.01488963, 0.001559834]
  }),
  CardboardV2: new CardboardViewer({
    id: 'CardboardV2',
    label: 'Cardboard I/O 2015',
    fov: 60,
    interLensDistance: 0.064,
    baselineLensDistance: 0.035,
    screenLensDistance: 0.039,
    distortionCoefficients: [0.34, 0.55],
    inverseCoefficients: [-0.33836704, -0.18162185, 0.862655, -1.2462051, 1.0560602, -0.58208317, 0.21609078, -0.05444823, 0.009177956, -9.904169E-4, 6.183535E-5, -1.6981803E-6]
  })
};
function DeviceInfo(deviceParams, additionalViewers) {
  this.viewer = Viewers.CardboardV2;
  this.updateDeviceParams(deviceParams);
  this.distortion = new Distortion(this.viewer.distortionCoefficients);
  for (var i = 0; i < additionalViewers.length; i++) {
    var viewer = additionalViewers[i];
    Viewers[viewer.id] = new CardboardViewer(viewer);
  }
}
DeviceInfo.prototype.updateDeviceParams = function (deviceParams) {
  this.device = this.determineDevice_(deviceParams) || this.device;
};
DeviceInfo.prototype.getDevice = function () {
  return this.device;
};
DeviceInfo.prototype.setViewer = function (viewer) {
  this.viewer = viewer;
  this.distortion = new Distortion(this.viewer.distortionCoefficients);
};
DeviceInfo.prototype.determineDevice_ = function (deviceParams) {
  if (!deviceParams) {
    if (isIOS()) {
      console.warn('Using fallback iOS device measurements.');
      return DEFAULT_IOS;
    } else {
      console.warn('Using fallback Android device measurements.');
      return DEFAULT_ANDROID;
    }
  }
  var METERS_PER_INCH = 0.0254;
  var metersPerPixelX = METERS_PER_INCH / deviceParams.xdpi;
  var metersPerPixelY = METERS_PER_INCH / deviceParams.ydpi;
  var width = getScreenWidth();
  var height = getScreenHeight();
  return new Device({
    widthMeters: metersPerPixelX * width,
    heightMeters: metersPerPixelY * height,
    bevelMeters: deviceParams.bevelMm * 0.001
  });
};
DeviceInfo.prototype.getDistortedFieldOfViewLeftEye = function () {
  var viewer = this.viewer;
  var device = this.device;
  var distortion = this.distortion;
  var eyeToScreenDistance = viewer.screenLensDistance;
  var outerDist = (device.widthMeters - viewer.interLensDistance) / 2;
  var innerDist = viewer.interLensDistance / 2;
  var bottomDist = viewer.baselineLensDistance - device.bevelMeters;
  var topDist = device.heightMeters - bottomDist;
  var outerAngle = radToDeg * Math.atan(distortion.distort(outerDist / eyeToScreenDistance));
  var innerAngle = radToDeg * Math.atan(distortion.distort(innerDist / eyeToScreenDistance));
  var bottomAngle = radToDeg * Math.atan(distortion.distort(bottomDist / eyeToScreenDistance));
  var topAngle = radToDeg * Math.atan(distortion.distort(topDist / eyeToScreenDistance));
  return {
    leftDegrees: Math.min(outerAngle, viewer.fov),
    rightDegrees: Math.min(innerAngle, viewer.fov),
    downDegrees: Math.min(bottomAngle, viewer.fov),
    upDegrees: Math.min(topAngle, viewer.fov)
  };
};
DeviceInfo.prototype.getLeftEyeVisibleTanAngles = function () {
  var viewer = this.viewer;
  var device = this.device;
  var distortion = this.distortion;
  var fovLeft = Math.tan(-degToRad * viewer.fov);
  var fovTop = Math.tan(degToRad * viewer.fov);
  var fovRight = Math.tan(degToRad * viewer.fov);
  var fovBottom = Math.tan(-degToRad * viewer.fov);
  var halfWidth = device.widthMeters / 4;
  var halfHeight = device.heightMeters / 2;
  var verticalLensOffset = viewer.baselineLensDistance - device.bevelMeters - halfHeight;
  var centerX = viewer.interLensDistance / 2 - halfWidth;
  var centerY = -verticalLensOffset;
  var centerZ = viewer.screenLensDistance;
  var screenLeft = distortion.distort((centerX - halfWidth) / centerZ);
  var screenTop = distortion.distort((centerY + halfHeight) / centerZ);
  var screenRight = distortion.distort((centerX + halfWidth) / centerZ);
  var screenBottom = distortion.distort((centerY - halfHeight) / centerZ);
  var result = new Float32Array(4);
  result[0] = Math.max(fovLeft, screenLeft);
  result[1] = Math.min(fovTop, screenTop);
  result[2] = Math.min(fovRight, screenRight);
  result[3] = Math.max(fovBottom, screenBottom);
  return result;
};
DeviceInfo.prototype.getLeftEyeNoLensTanAngles = function () {
  var viewer = this.viewer;
  var device = this.device;
  var distortion = this.distortion;
  var result = new Float32Array(4);
  var fovLeft = distortion.distortInverse(Math.tan(-degToRad * viewer.fov));
  var fovTop = distortion.distortInverse(Math.tan(degToRad * viewer.fov));
  var fovRight = distortion.distortInverse(Math.tan(degToRad * viewer.fov));
  var fovBottom = distortion.distortInverse(Math.tan(-degToRad * viewer.fov));
  var halfWidth = device.widthMeters / 4;
  var halfHeight = device.heightMeters / 2;
  var verticalLensOffset = viewer.baselineLensDistance - device.bevelMeters - halfHeight;
  var centerX = viewer.interLensDistance / 2 - halfWidth;
  var centerY = -verticalLensOffset;
  var centerZ = viewer.screenLensDistance;
  var screenLeft = (centerX - halfWidth) / centerZ;
  var screenTop = (centerY + halfHeight) / centerZ;
  var screenRight = (centerX + halfWidth) / centerZ;
  var screenBottom = (centerY - halfHeight) / centerZ;
  result[0] = Math.max(fovLeft, screenLeft);
  result[1] = Math.min(fovTop, screenTop);
  result[2] = Math.min(fovRight, screenRight);
  result[3] = Math.max(fovBottom, screenBottom);
  return result;
};
DeviceInfo.prototype.getLeftEyeVisibleScreenRect = function (undistortedFrustum) {
  var viewer = this.viewer;
  var device = this.device;
  var dist = viewer.screenLensDistance;
  var eyeX = (device.widthMeters - viewer.interLensDistance) / 2;
  var eyeY = viewer.baselineLensDistance - device.bevelMeters;
  var left = (undistortedFrustum[0] * dist + eyeX) / device.widthMeters;
  var top = (undistortedFrustum[1] * dist + eyeY) / device.heightMeters;
  var right = (undistortedFrustum[2] * dist + eyeX) / device.widthMeters;
  var bottom = (undistortedFrustum[3] * dist + eyeY) / device.heightMeters;
  return {
    x: left,
    y: bottom,
    width: right - left,
    height: top - bottom
  };
};
DeviceInfo.prototype.getFieldOfViewLeftEye = function (opt_isUndistorted) {
  return opt_isUndistorted ? this.getUndistortedFieldOfViewLeftEye() : this.getDistortedFieldOfViewLeftEye();
};
DeviceInfo.prototype.getFieldOfViewRightEye = function (opt_isUndistorted) {
  var fov = this.getFieldOfViewLeftEye(opt_isUndistorted);
  return {
    leftDegrees: fov.rightDegrees,
    rightDegrees: fov.leftDegrees,
    upDegrees: fov.upDegrees,
    downDegrees: fov.downDegrees
  };
};
DeviceInfo.prototype.getUndistortedFieldOfViewLeftEye = function () {
  var p = this.getUndistortedParams_();
  return {
    leftDegrees: radToDeg * Math.atan(p.outerDist),
    rightDegrees: radToDeg * Math.atan(p.innerDist),
    downDegrees: radToDeg * Math.atan(p.bottomDist),
    upDegrees: radToDeg * Math.atan(p.topDist)
  };
};
DeviceInfo.prototype.getUndistortedViewportLeftEye = function () {
  var p = this.getUndistortedParams_();
  var viewer = this.viewer;
  var device = this.device;
  var eyeToScreenDistance = viewer.screenLensDistance;
  var screenWidth = device.widthMeters / eyeToScreenDistance;
  var screenHeight = device.heightMeters / eyeToScreenDistance;
  var xPxPerTanAngle = device.width / screenWidth;
  var yPxPerTanAngle = device.height / screenHeight;
  var x = Math.round((p.eyePosX - p.outerDist) * xPxPerTanAngle);
  var y = Math.round((p.eyePosY - p.bottomDist) * yPxPerTanAngle);
  return {
    x: x,
    y: y,
    width: Math.round((p.eyePosX + p.innerDist) * xPxPerTanAngle) - x,
    height: Math.round((p.eyePosY + p.topDist) * yPxPerTanAngle) - y
  };
};
DeviceInfo.prototype.getUndistortedParams_ = function () {
  var viewer = this.viewer;
  var device = this.device;
  var distortion = this.distortion;
  var eyeToScreenDistance = viewer.screenLensDistance;
  var halfLensDistance = viewer.interLensDistance / 2 / eyeToScreenDistance;
  var screenWidth = device.widthMeters / eyeToScreenDistance;
  var screenHeight = device.heightMeters / eyeToScreenDistance;
  var eyePosX = screenWidth / 2 - halfLensDistance;
  var eyePosY = (viewer.baselineLensDistance - device.bevelMeters) / eyeToScreenDistance;
  var maxFov = viewer.fov;
  var viewerMax = distortion.distortInverse(Math.tan(degToRad * maxFov));
  var outerDist = Math.min(eyePosX, viewerMax);
  var innerDist = Math.min(halfLensDistance, viewerMax);
  var bottomDist = Math.min(eyePosY, viewerMax);
  var topDist = Math.min(screenHeight - eyePosY, viewerMax);
  return {
    outerDist: outerDist,
    innerDist: innerDist,
    topDist: topDist,
    bottomDist: bottomDist,
    eyePosX: eyePosX,
    eyePosY: eyePosY
  };
};
function CardboardViewer(params) {
  this.id = params.id;
  this.label = params.label;
  this.fov = params.fov;
  this.interLensDistance = params.interLensDistance;
  this.baselineLensDistance = params.baselineLensDistance;
  this.screenLensDistance = params.screenLensDistance;
  this.distortionCoefficients = params.distortionCoefficients;
  this.inverseCoefficients = params.inverseCoefficients;
}
DeviceInfo.Viewers = Viewers;
var format = 1;
var last_updated = "2019-11-09T17:36:14Z";
var devices = [{"type":"android","rules":[{"mdmh":"asus/*/Nexus 7/*"},{"ua":"Nexus 7"}],"dpi":[320.8,323],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"asus/*/ASUS_X00PD/*"},{"ua":"ASUS_X00PD"} … [Строка слишком длинная. Вы можете скачать файл]
var DPDB_CACHE = {
	format: format,
	last_updated: last_updated,
	devices: devices
};
function Dpdb(url, onDeviceParamsUpdated) {
  this.dpdb = DPDB_CACHE;
  this.recalculateDeviceParams_();
  if (url) {
    this.onDeviceParamsUpdated = onDeviceParamsUpdated;
    var xhr = new XMLHttpRequest();
    var obj = this;
    xhr.open('GET', url, true);
    xhr.addEventListener('load', function () {
      obj.loading = false;
      if (xhr.status >= 200 && xhr.status <= 299) {
        obj.dpdb = JSON.parse(xhr.response);
        obj.recalculateDeviceParams_();
      } else {
        console.error('Error loading online DPDB!');
      }
    });
    xhr.send();
  }
}
Dpdb.prototype.getDeviceParams = function () {
  return this.deviceParams;
};
Dpdb.prototype.recalculateDeviceParams_ = function () {
  var newDeviceParams = this.calcDeviceParams_();
  if (newDeviceParams) {
    this.deviceParams = newDeviceParams;
    if (this.onDeviceParamsUpdated) {
      this.onDeviceParamsUpdated(this.deviceParams);
    }
  } else {
    console.error('Failed to recalculate device parameters.');
  }
};
Dpdb.prototype.calcDeviceParams_ = function () {
  var db = this.dpdb;
  if (!db) {
    console.error('DPDB not available.');
    return null;
  }
  if (db.format != 1) {
    console.error('DPDB has unexpected format version.');
    return null;
  }
  if (!db.devices || !db.devices.length) {
    console.error('DPDB does not have a devices section.');
    return null;
  }
  var userAgent = navigator.userAgent || navigator.vendor || window.opera;
  var width = getScreenWidth();
  var height = getScreenHeight();
  if (!db.devices) {
    console.error('DPDB has no devices section.');
    return null;
  }
  for (var i = 0; i < db.devices.length; i++) {
    var device = db.devices[i];
    if (!device.rules) {
      console.warn('Device[' + i + '] has no rules section.');
      continue;
    }
    if (device.type != 'ios' && device.type != 'android') {
      console.warn('Device[' + i + '] has invalid type.');
      continue;
    }
    if (isIOS() != (device.type == 'ios')) continue;
    var matched = false;
    for (var j = 0; j < device.rules.length; j++) {
      var rule = device.rules[j];
      if (this.ruleMatches_(rule, userAgent, width, height)) {
        matched = true;
        break;
      }
    }
    if (!matched) continue;
    var xdpi = device.dpi[0] || device.dpi;
    var ydpi = device.dpi[1] || device.dpi;
    return new DeviceParams({ xdpi: xdpi, ydpi: ydpi, bevelMm: device.bw });
  }
  console.warn('No DPDB device match.');
  return null;
};
Dpdb.prototype.ruleMatches_ = function (rule, ua, screenWidth, screenHeight) {
  if (!rule.ua && !rule.res) return false;
  if (rule.ua && rule.ua.substring(0, 2) === 'SM') rule.ua = rule.ua.substring(0, 7);
  if (rule.ua && ua.indexOf(rule.ua) < 0) return false;
  if (rule.res) {
    if (!rule.res[0] || !rule.res[1]) return false;
    var resX = rule.res[0];
    var resY = rule.res[1];
    if (Math.min(screenWidth, screenHeight) != Math.min(resX, resY) || Math.max(screenWidth, screenHeight) != Math.max(resX, resY)) {
      return false;
    }
  }
  return true;
};
function DeviceParams(params) {
  this.xdpi = params.xdpi;
  this.ydpi = params.ydpi;
  this.bevelMm = params.bevelMm;
}
function SensorSample(sample, timestampS) {
  this.set(sample, timestampS);
}
SensorSample.prototype.set = function (sample, timestampS) {
  this.sample = sample;
  this.timestampS = timestampS;
};
SensorSample.prototype.copy = function (sensorSample) {
  this.set(sensorSample.sample, sensorSample.timestampS);
};
function ComplementaryFilter(kFilter, isDebug) {
  this.kFilter = kFilter;
  this.isDebug = isDebug;
  this.currentAccelMeasurement = new SensorSample();
  this.currentGyroMeasurement = new SensorSample();
  this.previousGyroMeasurement = new SensorSample();
  if (isIOS()) {
    this.filterQ = new Quaternion(-1, 0, 0, 1);
  } else {
    this.filterQ = new Quaternion(1, 0, 0, 1);
  }
  this.previousFilterQ = new Quaternion();
  this.previousFilterQ.copy(this.filterQ);
  this.accelQ = new Quaternion();
  this.isOrientationInitialized = false;
  this.estimatedGravity = new Vector3();
  this.measuredGravity = new Vector3();
  this.gyroIntegralQ = new Quaternion();
}
ComplementaryFilter.prototype.addAccelMeasurement = function (vector, timestampS) {
  this.currentAccelMeasurement.set(vector, timestampS);
};
ComplementaryFilter.prototype.addGyroMeasurement = function (vector, timestampS) {
  this.currentGyroMeasurement.set(vector, timestampS);
  var deltaT = timestampS - this.previousGyroMeasurement.timestampS;
  if (isTimestampDeltaValid(deltaT)) {
    this.run_();
  }
  this.previousGyroMeasurement.copy(this.currentGyroMeasurement);
};
ComplementaryFilter.prototype.run_ = function () {
  if (!this.isOrientationInitialized) {
    this.accelQ = this.accelToQuaternion_(this.currentAccelMeasurement.sample);
    this.previousFilterQ.copy(this.accelQ);
    this.isOrientationInitialized = true;
    return;
  }
  var deltaT = this.currentGyroMeasurement.timestampS - this.previousGyroMeasurement.timestampS;
  var gyroDeltaQ = this.gyroToQuaternionDelta_(this.currentGyroMeasurement.sample, deltaT);
  this.gyroIntegralQ.multiply(gyroDeltaQ);
  this.filterQ.copy(this.previousFilterQ);
  this.filterQ.multiply(gyroDeltaQ);
  var invFilterQ = new Quaternion();
  invFilterQ.copy(this.filterQ);
  invFilterQ.inverse();
  this.estimatedGravity.set(0, 0, -1);
  this.estimatedGravity.applyQuaternion(invFilterQ);
  this.estimatedGravity.normalize();
  this.measuredGravity.copy(this.currentAccelMeasurement.sample);
  this.measuredGravity.normalize();
  var deltaQ = new Quaternion();
  deltaQ.setFromUnitVectors(this.estimatedGravity, this.measuredGravity);
  deltaQ.inverse();
  if (this.isDebug) {
    console.log('Delta: %d deg, G_est: (%s, %s, %s), G_meas: (%s, %s, %s)', radToDeg * getQuaternionAngle(deltaQ), this.estimatedGravity.x.toFixed(1), this.estimatedGravity.y.toFixed(1), this.estimatedGravity.z.toFixed(1), this.measuredGravity.x.toFixed(1), this.measuredGravity.y.toFixed(1), this.measuredGravity.z.toFixed(1));
  }
  var targetQ = new Quaternion();
  targetQ.copy(this.filterQ);
  targetQ.multiply(deltaQ);
  this.filterQ.slerp(targetQ, 1 - this.kFilter);
  this.previousFilterQ.copy(this.filterQ);
};
ComplementaryFilter.prototype.getOrientation = function () {
  return this.filterQ;
};
ComplementaryFilter.prototype.accelToQuaternion_ = function (accel) {
  var normAccel = new Vector3();
  normAccel.copy(accel);
  normAccel.normalize();
  var quat = new Quaternion();
  quat.setFromUnitVectors(new Vector3(0, 0, -1), normAccel);
  quat.inverse();
  return quat;
};
ComplementaryFilter.prototype.gyroToQuaternionDelta_ = function (gyro, dt) {
  var quat = new Quaternion();
  var axis = new Vector3();
  axis.copy(gyro);
  axis.normalize();
  quat.setFromAxisAngle(axis, gyro.length() * dt);
  return quat;
};
function PosePredictor(predictionTimeS, isDebug) {
  this.predictionTimeS = predictionTimeS;
  this.isDebug = isDebug;
  this.previousQ = new Quaternion();
  this.previousTimestampS = null;
  this.deltaQ = new Quaternion();
  this.outQ = new Quaternion();
}
PosePredictor.prototype.getPrediction = function (currentQ, gyro, timestampS) {
  if (!this.previousTimestampS) {
    this.previousQ.copy(currentQ);
    this.previousTimestampS = timestampS;
    return currentQ;
  }
  var axis = new Vector3();
  axis.copy(gyro);
  axis.normalize();
  var angularSpeed = gyro.length();
  if (angularSpeed < degToRad * 20) {
    if (this.isDebug) {
      console.log('Moving slowly, at %s deg/s: no prediction', (radToDeg * angularSpeed).toFixed(1));
    }
    this.outQ.copy(currentQ);
    this.previousQ.copy(currentQ);
    return this.outQ;
  }
  var predictAngle = angularSpeed * this.predictionTimeS;
  this.deltaQ.setFromAxisAngle(axis, predictAngle);
  this.outQ.copy(this.previousQ);
  this.outQ.multiply(this.deltaQ);
  this.previousQ.copy(currentQ);
  this.previousTimestampS = timestampS;
  return this.outQ;
};
function FusionPoseSensor(kFilter, predictionTime, yawOnly, isDebug) {
  this.yawOnly = yawOnly;
  this.accelerometer = new Vector3();
  this.gyroscope = new Vector3();
  this.filter = new ComplementaryFilter(kFilter, isDebug);
  this.posePredictor = new PosePredictor(predictionTime, isDebug);
  this.isFirefoxAndroid = isFirefoxAndroid();
  this.isIOS = isIOS();
  var chromeVersion = getChromeVersion();
  this.isDeviceMotionInRadians = !this.isIOS && chromeVersion && chromeVersion < 66;
  this.isWithoutDeviceMotion = isChromeWithoutDeviceMotion() || isSafariWithoutDeviceMotion();
  this.filterToWorldQ = new Quaternion();
  if (isIOS()) {
    this.filterToWorldQ.setFromAxisAngle(new Vector3(1, 0, 0), Math.PI / 2);
  } else {
    this.filterToWorldQ.setFromAxisAngle(new Vector3(1, 0, 0), -Math.PI / 2);
  }
  this.inverseWorldToScreenQ = new Quaternion();
  this.worldToScreenQ = new Quaternion();
  this.originalPoseAdjustQ = new Quaternion();
  this.originalPoseAdjustQ.setFromAxisAngle(new Vector3(0, 0, 1), -window.orientation * Math.PI / 180);
  this.setScreenTransform_();
  if (isLandscapeMode()) {
    this.filterToWorldQ.multiply(this.inverseWorldToScreenQ);
  }
  this.resetQ = new Quaternion();
  this.orientationOut_ = new Float32Array(4);
  this.start();
}
FusionPoseSensor.prototype.getPosition = function () {
  return null;
};
FusionPoseSensor.prototype.getOrientation = function () {
  var orientation = void 0;
  if (this.isWithoutDeviceMotion && this._deviceOrientationQ) {
    this.deviceOrientationFixQ = this.deviceOrientationFixQ || function () {
      var z = new Quaternion().setFromAxisAngle(new Vector3(0, 0, -1), 0);
      var y = new Quaternion();
      if (window.orientation === -90) {
        y.setFromAxisAngle(new Vector3(0, 1, 0), Math.PI / -2);
      } else {
        y.setFromAxisAngle(new Vector3(0, 1, 0), Math.PI / 2);
      }
      return z.multiply(y);
    }();
    this.deviceOrientationFilterToWorldQ = this.deviceOrientationFilterToWorldQ || function () {
      var q = new Quaternion();
      q.setFromAxisAngle(new Vector3(1, 0, 0), -Math.PI / 2);
      return q;
    }();
    orientation = this._deviceOrientationQ;
    var out = new Quaternion();
    out.copy(orientation);
    out.multiply(this.deviceOrientationFilterToWorldQ);
    out.multiply(this.resetQ);
    out.multiply(this.worldToScreenQ);
    out.multiplyQuaternions(this.deviceOrientationFixQ, out);
    if (this.yawOnly) {
      out.x = 0;
      out.z = 0;
      out.normalize();
    }
    this.orientationOut_[0] = out.x;
    this.orientationOut_[1] = out.y;
    this.orientationOut_[2] = out.z;
    this.orientationOut_[3] = out.w;
    return this.orientationOut_;
  } else {
    var filterOrientation = this.filter.getOrientation();
    orientation = this.posePredictor.getPrediction(filterOrientation, this.gyroscope, this.previousTimestampS);
  }
  var out = new Quaternion();
  out.copy(this.filterToWorldQ);
  out.multiply(this.resetQ);
  out.multiply(orientation);
  out.multiply(this.worldToScreenQ);
  if (this.yawOnly) {
    out.x = 0;
    out.z = 0;
    out.normalize();
  }
  this.orientationOut_[0] = out.x;
  this.orientationOut_[1] = out.y;
  this.orientationOut_[2] = out.z;
  this.orientationOut_[3] = out.w;
  return this.orientationOut_;
};
FusionPoseSensor.prototype.resetPose = function () {
  this.resetQ.copy(this.filter.getOrientation());
  this.resetQ.x = 0;
  this.resetQ.y = 0;
  this.resetQ.z *= -1;
  this.resetQ.normalize();
  if (isLandscapeMode()) {
    this.resetQ.multiply(this.inverseWorldToScreenQ);
  }
  this.resetQ.multiply(this.originalPoseAdjustQ);
};
FusionPoseSensor.prototype.onDeviceOrientation_ = function (e) {
  this._deviceOrientationQ = this._deviceOrientationQ || new Quaternion();
  var alpha = e.alpha,
      beta = e.beta,
      gamma = e.gamma;
  alpha = (alpha || 0) * Math.PI / 180;
  beta = (beta || 0) * Math.PI / 180;
  gamma = (gamma || 0) * Math.PI / 180;
  this._deviceOrientationQ.setFromEulerYXZ(beta, alpha, -gamma);
};
FusionPoseSensor.prototype.onDeviceMotion_ = function (deviceMotion) {
  this.updateDeviceMotion_(deviceMotion);
};
FusionPoseSensor.prototype.updateDeviceMotion_ = function (deviceMotion) {
  var accGravity = deviceMotion.accelerationIncludingGravity;
  var rotRate = deviceMotion.rotationRate;
  var timestampS = deviceMotion.timeStamp / 1000;
  var deltaS = timestampS - this.previousTimestampS;
  if (deltaS < 0) {
    warnOnce('fusion-pose-sensor:invalid:non-monotonic', 'Invalid timestamps detected: non-monotonic timestamp from devicemotion');
    this.previousTimestampS = timestampS;
    return;
  } else if (deltaS <= MIN_TIMESTEP || deltaS > MAX_TIMESTEP) {
    warnOnce('fusion-pose-sensor:invalid:outside-threshold', 'Invalid timestamps detected: Timestamp from devicemotion outside expected range.');
    this.previousTimestampS = timestampS;
    return;
  }
  this.accelerometer.set(-accGravity.x, -accGravity.y, -accGravity.z);
  if (rotRate) {
    if (isR7()) {
      this.gyroscope.set(-rotRate.beta, rotRate.alpha, rotRate.gamma);
    } else {
      this.gyroscope.set(rotRate.alpha, rotRate.beta, rotRate.gamma);
    }
    if (!this.isDeviceMotionInRadians) {
      this.gyroscope.multiplyScalar(Math.PI / 180);
    }
    this.filter.addGyroMeasurement(this.gyroscope, timestampS);
  }
  this.filter.addAccelMeasurement(this.accelerometer, timestampS);
  this.previousTimestampS = timestampS;
};
FusionPoseSensor.prototype.onOrientationChange_ = function (screenOrientation) {
  this.setScreenTransform_();
};
FusionPoseSensor.prototype.onMessage_ = function (event) {
  var message = event.data;
  if (!message || !message.type) {
    return;
  }
  var type = message.type.toLowerCase();
  if (type !== 'devicemotion') {
    return;
  }
  this.updateDeviceMotion_(message.deviceMotionEvent);
};
FusionPoseSensor.prototype.setScreenTransform_ = function () {
  this.worldToScreenQ.set(0, 0, 0, 1);
  switch (window.orientation) {
    case 0:
      break;
    case 90:
      this.worldToScreenQ.setFromAxisAngle(new Vector3(0, 0, 1), -Math.PI / 2);
      break;
    case -90:
      this.worldToScreenQ.setFromAxisAngle(new Vector3(0, 0, 1), Math.PI / 2);
      break;
    case 180:
      break;
  }
  this.inverseWorldToScreenQ.copy(this.worldToScreenQ);
  this.inverseWorldToScreenQ.inverse();
};
FusionPoseSensor.prototype.start = function () {
  this.onDeviceMotionCallback_ = this.onDeviceMotion_.bind(this);
  this.onOrientationChangeCallback_ = this.onOrientationChange_.bind(this);
  this.onMessageCallback_ = this.onMessage_.bind(this);
  this.onDeviceOrientationCallback_ = this.onDeviceOrientation_.bind(this);
  if (isIOS() && isInsideCrossOriginIFrame()) {
    window.addEventListener('message', this.onMessageCallback_);
  }
  window.addEventListener('orientationchange', this.onOrientationChangeCallback_);
  if (this.isWithoutDeviceMotion) {
    window.addEventListener('deviceorientation', this.onDeviceOrientationCallback_);
  } else {
    window.addEventListener('devicemotion', this.onDeviceMotionCallback_);
  }
};
FusionPoseSensor.prototype.stop = function () {
  window.removeEventListener('devicemotion', this.onDeviceMotionCallback_);
  window.removeEventListener('deviceorientation', this.onDeviceOrientationCallback_);
  window.removeEventListener('orientationchange', this.onOrientationChangeCallback_);
  window.removeEventListener('message', this.onMessageCallback_);
};
var SENSOR_FREQUENCY = 60;
var X_AXIS = new Vector3(1, 0, 0);
var Z_AXIS = new Vector3(0, 0, 1);
var SENSOR_TO_VR = new Quaternion();
SENSOR_TO_VR.setFromAxisAngle(X_AXIS, -Math.PI / 2);
SENSOR_TO_VR.multiply(new Quaternion().setFromAxisAngle(Z_AXIS, Math.PI / 2));
var PoseSensor = function () {
  function PoseSensor(config) {
    classCallCheck(this, PoseSensor);
    this.config = config;
    this.sensor = null;
    this.fusionSensor = null;
    this._out = new Float32Array(4);
    this.api = null;
    this.errors = [];
    this._sensorQ = new Quaternion();
    this._outQ = new Quaternion();
    this._onSensorRead = this._onSensorRead.bind(this);
    this._onSensorError = this._onSensorError.bind(this);
    this.init();
  }
  createClass(PoseSensor, [{
    key: 'init',
    value: function init() {
      var sensor = null;
      try {
        sensor = new RelativeOrientationSensor({
          frequency: SENSOR_FREQUENCY,
          referenceFrame: 'screen'
        });
        sensor.addEventListener('error', this._onSensorError);
      } catch (error) {
        this.errors.push(error);
        if (error.name === 'SecurityError') {
          console.error('Cannot construct sensors due to the Feature Policy');
          console.warn('Attempting to fall back using "devicemotion"; however this will ' + 'fail in the future without correct permissions.');
          this.useDeviceMotion();
        } else if (error.name === 'ReferenceError') {
          this.useDeviceMotion();
        } else {
          console.error(error);
        }
      }
      if (sensor) {
        this.api = 'sensor';
        this.sensor = sensor;
        this.sensor.addEventListener('reading', this._onSensorRead);
        this.sensor.start();
      }
    }
  }, {
    key: 'useDeviceMotion',
    value: function useDeviceMotion() {
      this.api = 'devicemotion';
      this.fusionSensor = new FusionPoseSensor(this.config.K_FILTER, this.config.PREDICTION_TIME_S, this.config.YAW_ONLY, this.config.DEBUG);
      if (this.sensor) {
        this.sensor.removeEventListener('reading', this._onSensorRead);
        this.sensor.removeEventListener('error', this._onSensorError);
        this.sensor = null;
      }
    }
  }, {
    key: 'getOrientation',
    value: function getOrientation() {
      if (this.fusionSensor) {
        return this.fusionSensor.getOrientation();
      }
      if (!this.sensor || !this.sensor.quaternion) {
        this._out[0] = this._out[1] = this._out[2] = 0;
        this._out[3] = 1;
        return this._out;
      }
      var q = this.sensor.quaternion;
      this._sensorQ.set(q[0], q[1], q[2], q[3]);
      var out = this._outQ;
      out.copy(SENSOR_TO_VR);
      out.multiply(this._sensorQ);
      if (this.config.YAW_ONLY) {
        out.x = out.z = 0;
        out.normalize();
      }
      this._out[0] = out.x;
      this._out[1] = out.y;
      this._out[2] = out.z;
      this._out[3] = out.w;
      return this._out;
    }
  }, {
    key: '_onSensorError',
    value: function _onSensorError(event) {
      this.errors.push(event.error);
      if (event.error.name === 'NotAllowedError') {
        console.error('Permission to access sensor was denied');
      } else if (event.error.name === 'NotReadableError') {
        console.error('Sensor could not be read');
      } else {
        console.error(event.error);
      }
      this.useDeviceMotion();
    }
  }, {
    key: '_onSensorRead',
    value: function _onSensorRead() {}
  }]);
  return PoseSensor;
}();
var rotateInstructionsAsset = "<svg width='198' height='240' viewBox='0 0 198 240' xmlns='http://www.w3.org/2000/svg'><g fill='none' fill-rule='evenodd'><path d='M149.625 109.527l6.737 3.891v.886c0 .1 … [Строка слишком длинная. Вы можете скачать файл]
function RotateInstructions() {
  this.loadIcon_();
  var overlay = document.createElement('div');
  var s = overlay.style;
  s.position = 'fixed';
  s.top = 0;
  s.right = 0;
  s.bottom = 0;
  s.left = 0;
  s.backgroundColor = 'gray';
  s.fontFamily = 'sans-serif';
  s.zIndex = 1000000;
  var img = document.createElement('img');
  img.src = this.icon;
  var s = img.style;
  s.marginLeft = '25%';
  s.marginTop = '25%';
  s.width = '50%';
  overlay.appendChild(img);
  var text = document.createElement('div');
  var s = text.style;
  s.textAlign = 'center';
  s.fontSize = '16px';
  s.lineHeight = '24px';
  s.margin = '24px 25%';
  s.width = '50%';
  text.innerHTML = 'Place your phone into your Cardboard viewer.';
  overlay.appendChild(text);
  var snackbar = document.createElement('div');
  var s = snackbar.style;
  s.backgroundColor = '#CFD8DC';
  s.position = 'fixed';
  s.bottom = 0;
  s.width = '100%';
  s.height = '48px';
  s.padding = '14px 24px';
  s.boxSizing = 'border-box';
  s.color = '#656A6B';
  overlay.appendChild(snackbar);
  var snackbarText = document.createElement('div');
  snackbarText.style.float = 'left';
  snackbarText.innerHTML = 'No Cardboard viewer?';
  var snackbarButton = document.createElement('a');
  snackbarButton.href = 'https://www.google.com/get/cardboard/get-cardboard/';
  snackbarButton.innerHTML = 'get one';
  snackbarButton.target = '_blank';
  var s = snackbarButton.style;
  s.float = 'right';
  s.fontWeight = 600;
  s.textTransform = 'uppercase';
  s.borderLeft = '1px solid gray';
  s.paddingLeft = '24px';
  s.textDecoration = 'none';
  s.color = '#656A6B';
  snackbar.appendChild(snackbarText);
  snackbar.appendChild(snackbarButton);
  this.overlay = overlay;
  this.text = text;
  this.hide();
}
RotateInstructions.prototype.show = function (parent) {
  if (!parent && !this.overlay.parentElement) {
    document.body.appendChild(this.overlay);
  } else if (parent) {
    if (this.overlay.parentElement && this.overlay.parentElement != parent) this.overlay.parentElement.removeChild(this.overlay);
    parent.appendChild(this.overlay);
  }
  this.overlay.style.display = 'block';
  var img = this.overlay.querySelector('img');
  var s = img.style;
  if (isLandscapeMode()) {
    s.width = '20%';
    s.marginLeft = '40%';
    s.marginTop = '3%';
  } else {
    s.width = '50%';
    s.marginLeft = '25%';
    s.marginTop = '25%';
  }
};
RotateInstructions.prototype.hide = function () {
  this.overlay.style.display = 'none';
};
RotateInstructions.prototype.showTemporarily = function (ms, parent) {
  this.show(parent);
  this.timer = setTimeout(this.hide.bind(this), ms);
};
RotateInstructions.prototype.disableShowTemporarily = function () {
  clearTimeout(this.timer);
};
RotateInstructions.prototype.update = function () {
  this.disableShowTemporarily();
  if (!isLandscapeMode() && isMobile()) {
    this.show();
  } else {
    this.hide();
  }
};
RotateInstructions.prototype.loadIcon_ = function () {
  this.icon = dataUri('image/svg+xml', rotateInstructionsAsset);
};
var DEFAULT_VIEWER = 'CardboardV1';
var VIEWER_KEY = 'WEBVR_CARDBOARD_VIEWER';
var CLASS_NAME = 'webvr-polyfill-viewer-selector';
function ViewerSelector(defaultViewer) {
  try {
    this.selectedKey = localStorage.getItem(VIEWER_KEY);
  } catch (error) {
    console.error('Failed to load viewer profile: %s', error);
  }
  if (!this.selectedKey) {
    this.selectedKey = defaultViewer || DEFAULT_VIEWER;
  }
  this.dialog = this.createDialog_(DeviceInfo.Viewers);
  this.root = null;
  this.onChangeCallbacks_ = [];
}
ViewerSelector.prototype.show = function (root) {
  this.root = root;
  root.appendChild(this.dialog);
  var selected = this.dialog.querySelector('#' + this.selectedKey);
  selected.checked = true;
  this.dialog.style.display = 'block';
};
ViewerSelector.prototype.hide = function () {
  if (this.root && this.root.contains(this.dialog)) {
    this.root.removeChild(this.dialog);
  }
  this.dialog.style.display = 'none';
};
ViewerSelector.prototype.getCurrentViewer = function () {
  return DeviceInfo.Viewers[this.selectedKey];
};
ViewerSelector.prototype.getSelectedKey_ = function () {
  var input = this.dialog.querySelector('input[name=field]:checked');
  if (input) {
    return input.id;
  }
  return null;
};
ViewerSelector.prototype.onChange = function (cb) {
  this.onChangeCallbacks_.push(cb);
};
ViewerSelector.prototype.fireOnChange_ = function (viewer) {
  for (var i = 0; i < this.onChangeCallbacks_.length; i++) {
    this.onChangeCallbacks_[i](viewer);
  }
};
ViewerSelector.prototype.onSave_ = function () {
  this.selectedKey = this.getSelectedKey_();
  if (!this.selectedKey || !DeviceInfo.Viewers[this.selectedKey]) {
    console.error('ViewerSelector.onSave_: this should never happen!');
    return;
  }
  this.fireOnChange_(DeviceInfo.Viewers[this.selectedKey]);
  try {
    localStorage.setItem(VIEWER_KEY, this.selectedKey);
  } catch (error) {
    console.error('Failed to save viewer profile: %s', error);
  }
  this.hide();
};
ViewerSelector.prototype.createDialog_ = function (options) {
  var container = document.createElement('div');
  container.classList.add(CLASS_NAME);
  container.style.display = 'none';
  var overlay = document.createElement('div');
  var s = overlay.style;
  s.position = 'fixed';
  s.left = 0;
  s.top = 0;
  s.width = '100%';
  s.height = '100%';
  s.background = 'rgba(0, 0, 0, 0.3)';
  overlay.addEventListener('click', this.hide.bind(this));
  var width = 280;
  var dialog = document.createElement('div');
  var s = dialog.style;
  s.boxSizing = 'border-box';
  s.position = 'fixed';
  s.top = '24px';
  s.left = '50%';
  s.marginLeft = -width / 2 + 'px';
  s.width = width + 'px';
  s.padding = '24px';
  s.overflow = 'hidden';
  s.background = '#fafafa';
  s.fontFamily = "'Roboto', sans-serif";
  s.boxShadow = '0px 5px 20px #666';
  dialog.appendChild(this.createH1_('Select your viewer'));
  for (var id in options) {
    dialog.appendChild(this.createChoice_(id, options[id].label));
  }
  dialog.appendChild(this.createButton_('Save', this.onSave_.bind(this)));
  container.appendChild(overlay);
  container.appendChild(dialog);
  return container;
};
ViewerSelector.prototype.createH1_ = function (name) {
  var h1 = document.createElement('h1');
  var s = h1.style;
  s.color = 'black';
  s.fontSize = '20px';
  s.fontWeight = 'bold';
  s.marginTop = 0;
  s.marginBottom = '24px';
  h1.innerHTML = name;
  return h1;
};
ViewerSelector.prototype.createChoice_ = function (id, name) {
  var div = document.createElement('div');
  div.style.marginTop = '8px';
  div.style.color = 'black';
  var input = document.createElement('input');
  input.style.fontSize = '30px';
  input.setAttribute('id', id);
  input.setAttribute('type', 'radio');
  input.setAttribute('value', id);
  input.setAttribute('name', 'field');
  var label = document.createElement('label');
  label.style.marginLeft = '4px';
  label.setAttribute('for', id);
  label.innerHTML = name;
  div.appendChild(input);
  div.appendChild(label);
  return div;
};
ViewerSelector.prototype.createButton_ = function (label, onclick) {
  var button = document.createElement('button');
  button.innerHTML = label;
  var s = button.style;
  s.float = 'right';
  s.textTransform = 'uppercase';
  s.color = '#1094f7';
  s.fontSize = '14px';
  s.letterSpacing = 0;
  s.border = 0;
  s.background = 'none';
  s.marginTop = '16px';
  button.addEventListener('click', onclick);
  return button;
};
var commonjsGlobal$$1 = typeof window !== 'undefined' ? window : typeof commonjsGlobal !== 'undefined' ? commonjsGlobal : typeof self !== 'undefined' ? self : {};
function unwrapExports$$1 (x) {
	return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
}
function createCommonjsModule$$1(fn, module) {
	return module = { exports: {} }, fn(module, module.exports), module.exports;
}
var NoSleep = createCommonjsModule$$1(function (module, exports) {
(function webpackUniversalModuleDefinition(root, factory) {
	module.exports = factory();
})(commonjsGlobal$$1, function() {
return          (function(modules) {
         	var installedModules = {};
         	function __webpack_require__(moduleId) {
         		if(installedModules[moduleId]) {
         			return installedModules[moduleId].exports;
         		}
         		var module = installedModules[moduleId] = {
         			i: moduleId,
         			l: false,
         			exports: {}
         		};
         		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
         		module.l = true;
         		return module.exports;
         	}
         	__webpack_require__.m = modules;
         	__webpack_require__.c = installedModules;
         	__webpack_require__.d = function(exports, name, getter) {
         		if(!__webpack_require__.o(exports, name)) {
         			Object.defineProperty(exports, name, {
         				configurable: false,
         				enumerable: true,
         				get: getter
         			});
         		}
         	};
         	__webpack_require__.n = function(module) {
         		var getter = module && module.__esModule ?
         			function getDefault() { return module['default']; } :
         			function getModuleExports() { return module; };
         		__webpack_require__.d(getter, 'a', getter);
         		return getter;
         	};
         	__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
         	__webpack_require__.p = "";
         	return __webpack_require__(__webpack_require__.s = 0);
         })
         ([
      (function(module, exports, __webpack_require__) {
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
var mediaFile = __webpack_require__(1);
var oldIOS = typeof navigator !== 'undefined' && parseFloat(('' + (/CPU.*OS ([0-9_]{3,4})[0-9_]{0,1}|(CPU like).*AppleWebKit.*Mobile/i.exec(navigator.userAgent) || [0, ''])[1]).replace('undefined', '3_2').replace('_', '.').replace('_', '')) < 10 && !window.MSStream;
var NoSleep = function () {
  function NoSleep() {
    _classCallCheck(this, NoSleep);
    if (oldIOS) {
      this.noSleepTimer = null;
    } else {
      this.noSleepVideo = document.createElement('video');
      this.noSleepVideo.setAttribute('playsinline', '');
      this.noSleepVideo.setAttribute('src', mediaFile);
      this.noSleepVideo.addEventListener('timeupdate', function (e) {
        if (this.noSleepVideo.currentTime > 0.5) {
          this.noSleepVideo.currentTime = Math.random();
        }
      }.bind(this));
    }
  }
  _createClass(NoSleep, [{
    key: 'enable',
    value: function enable() {
      if (oldIOS) {
        this.disable();
        this.noSleepTimer = window.setInterval(function () {
          window.location.href = '/';
          window.setTimeout(window.stop, 0);
        }, 15000);
      } else {
        this.noSleepVideo.play();
      }
    }
  }, {
    key: 'disable',
    value: function disable() {
      if (oldIOS) {
        if (this.noSleepTimer) {
          window.clearInterval(this.noSleepTimer);
          this.noSleepTimer = null;
        }
      } else {
        this.noSleepVideo.pause();
      }
    }
  }]);
  return NoSleep;
}();
module.exports = NoSleep;
      }),
      (function(module, exports, __webpack_require__) {
module.exports = 'data:video/mp4;base64,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      })
         ]);
});
});
var NoSleep$1 = unwrapExports$$1(NoSleep);
var nextDisplayId = 1000;
var defaultLeftBounds = [0, 0, 0.5, 1];
var defaultRightBounds = [0.5, 0, 0.5, 1];
var raf = window.requestAnimationFrame;
var caf = window.cancelAnimationFrame;
function VRFrameData() {
  this.leftProjectionMatrix = new Float32Array(16);
  this.leftViewMatrix = new Float32Array(16);
  this.rightProjectionMatrix = new Float32Array(16);
  this.rightViewMatrix = new Float32Array(16);
  this.pose = null;
}
function VRDisplayCapabilities(config) {
  Object.defineProperties(this, {
    hasPosition: {
      writable: false, enumerable: true, value: config.hasPosition
    },
    hasExternalDisplay: {
      writable: false, enumerable: true, value: config.hasExternalDisplay
    },
    canPresent: {
      writable: false, enumerable: true, value: config.canPresent
    },
    maxLayers: {
      writable: false, enumerable: true, value: config.maxLayers
    },
    hasOrientation: {
      enumerable: true, get: function get() {
        deprecateWarning('VRDisplayCapabilities.prototype.hasOrientation', 'VRDisplay.prototype.getFrameData');
        return config.hasOrientation;
      }
    }
  });
}
function VRDisplay(config) {
  config = config || {};
  var USE_WAKELOCK = 'wakelock' in config ? config.wakelock : true;
  this.isPolyfilled = true;
  this.displayId = nextDisplayId++;
  this.displayName = '';
  this.depthNear = 0.01;
  this.depthFar = 10000.0;
  this.isPresenting = false;
  Object.defineProperty(this, 'isConnected', {
    get: function get() {
      deprecateWarning('VRDisplay.prototype.isConnected', 'VRDisplayCapabilities.prototype.hasExternalDisplay');
      return false;
    }
  });
  this.capabilities = new VRDisplayCapabilities({
    hasPosition: false,
    hasOrientation: false,
    hasExternalDisplay: false,
    canPresent: false,
    maxLayers: 1
  });
  this.stageParameters = null;
  this.waitingForPresent_ = false;
  this.layer_ = null;
  this.originalParent_ = null;
  this.fullscreenElement_ = null;
  this.fullscreenWrapper_ = null;
  this.fullscreenElementCachedStyle_ = null;
  this.fullscreenEventTarget_ = null;
  this.fullscreenChangeHandler_ = null;
  this.fullscreenErrorHandler_ = null;
  if (USE_WAKELOCK && isMobile()) {
    this.wakelock_ = new NoSleep$1();
  }
}
VRDisplay.prototype.getFrameData = function (frameData) {
  return frameDataFromPose(frameData, this._getPose(), this);
};
VRDisplay.prototype.getPose = function () {
  deprecateWarning('VRDisplay.prototype.getPose', 'VRDisplay.prototype.getFrameData');
  return this._getPose();
};
VRDisplay.prototype.resetPose = function () {
  deprecateWarning('VRDisplay.prototype.resetPose');
  return this._resetPose();
};
VRDisplay.prototype.getImmediatePose = function () {
  deprecateWarning('VRDisplay.prototype.getImmediatePose', 'VRDisplay.prototype.getFrameData');
  return this._getPose();
};
VRDisplay.prototype.requestAnimationFrame = function (callback) {
  return raf(callback);
};
VRDisplay.prototype.cancelAnimationFrame = function (id) {
  return caf(id);
};
VRDisplay.prototype.wrapForFullscreen = function (element) {
  if (isIOS()) {
    return element;
  }
  if (!this.fullscreenWrapper_) {
    this.fullscreenWrapper_ = document.createElement('div');
    var cssProperties = ['height: ' + Math.min(screen.height, screen.width) + 'px !important', 'top: 0 !important', 'left: 0 !important', 'right: 0 !important', 'border: 0', 'margin: 0', 'padding: 0', 'z-index: 999999 !important', 'position: fixed'];
    this.fullscreenWrapper_.setAttribute('style', cssProperties.join('; ') + ';');
    this.fullscreenWrapper_.classList.add('webvr-polyfill-fullscreen-wrapper');
  }
  if (this.fullscreenElement_ == element) {
    return this.fullscreenWrapper_;
  }
  if (this.fullscreenElement_) {
    if (this.originalParent_) {
      this.originalParent_.appendChild(this.fullscreenElement_);
    } else {
      this.fullscreenElement_.parentElement.removeChild(this.fullscreenElement_);
    }
  }
  this.fullscreenElement_ = element;
  this.originalParent_ = element.parentElement;
  if (!this.originalParent_) {
    document.body.appendChild(element);
  }
  if (!this.fullscreenWrapper_.parentElement) {
    var parent = this.fullscreenElement_.parentElement;
    parent.insertBefore(this.fullscreenWrapper_, this.fullscreenElement_);
    parent.removeChild(this.fullscreenElement_);
  }
  this.fullscreenWrapper_.insertBefore(this.fullscreenElement_, this.fullscreenWrapper_.firstChild);
  this.fullscreenElementCachedStyle_ = this.fullscreenElement_.getAttribute('style');
  var self = this;
  function applyFullscreenElementStyle() {
    if (!self.fullscreenElement_) {
      return;
    }
    var cssProperties = ['position: absolute', 'top: 0', 'left: 0', 'width: ' + Math.max(screen.width, screen.height) + 'px', 'height: ' + Math.min(screen.height, screen.width) + 'px', 'border: 0', 'margin: 0', 'padding: 0'];
    self.fullscreenElement_.setAttribute('style', cssProperties.join('; ') + ';');
  }
  applyFullscreenElementStyle();
  return this.fullscreenWrapper_;
};
VRDisplay.prototype.removeFullscreenWrapper = function () {
  if (!this.fullscreenElement_) {
    return;
  }
  var element = this.fullscreenElement_;
  if (this.fullscreenElementCachedStyle_) {
    element.setAttribute('style', this.fullscreenElementCachedStyle_);
  } else {
    element.removeAttribute('style');
  }
  this.fullscreenElement_ = null;
  this.fullscreenElementCachedStyle_ = null;
  var parent = this.fullscreenWrapper_.parentElement;
  this.fullscreenWrapper_.removeChild(element);
  if (this.originalParent_ === parent) {
    parent.insertBefore(element, this.fullscreenWrapper_);
  }
  else if (this.originalParent_) {
      this.originalParent_.appendChild(element);
    }
  parent.removeChild(this.fullscreenWrapper_);
  return element;
};
VRDisplay.prototype.requestPresent = function (layers) {
  var wasPresenting = this.isPresenting;
  var self = this;
  if (!(layers instanceof Array)) {
    deprecateWarning('VRDisplay.prototype.requestPresent with non-array argument', 'an array of VRLayers as the first argument');
    layers = [layers];
  }
  return new Promise(function (resolve, reject) {
    if (!self.capabilities.canPresent) {
      reject(new Error('VRDisplay is not capable of presenting.'));
      return;
    }
    if (layers.length == 0 || layers.length > self.capabilities.maxLayers) {
      reject(new Error('Invalid number of layers.'));
      return;
    }
    var incomingLayer = layers[0];
    if (!incomingLayer.source) {
      resolve();
      return;
    }
    var leftBounds = incomingLayer.leftBounds || defaultLeftBounds;
    var rightBounds = incomingLayer.rightBounds || defaultRightBounds;
    if (wasPresenting) {
      var layer = self.layer_;
      if (layer.source !== incomingLayer.source) {
        layer.source = incomingLayer.source;
      }
      for (var i = 0; i < 4; i++) {
        layer.leftBounds[i] = leftBounds[i];
        layer.rightBounds[i] = rightBounds[i];
      }
      self.wrapForFullscreen(self.layer_.source);
      self.updatePresent_();
      resolve();
      return;
    }
    self.layer_ = {
      predistorted: incomingLayer.predistorted,
      source: incomingLayer.source,
      leftBounds: leftBounds.slice(0),
      rightBounds: rightBounds.slice(0)
    };
    self.waitingForPresent_ = false;
    if (self.layer_ && self.layer_.source) {
      var fullscreenElement = self.wrapForFullscreen(self.layer_.source);
      var onFullscreenChange = function onFullscreenChange() {
        var actualFullscreenElement = getFullscreenElement();
        self.isPresenting = fullscreenElement === actualFullscreenElement;
        if (self.isPresenting) {
          if (screen.orientation && screen.orientation.lock) {
            screen.orientation.lock('landscape-primary').catch(function (error) {
              console.error('screen.orientation.lock() failed due to', error.message);
            });
          }
          self.waitingForPresent_ = false;
          self.beginPresent_();
          resolve();
        } else {
          if (screen.orientation && screen.orientation.unlock) {
            screen.orientation.unlock();
          }
          self.removeFullscreenWrapper();
          self.disableWakeLock();
          self.endPresent_();
          self.removeFullscreenListeners_();
        }
        self.fireVRDisplayPresentChange_();
      };
      var onFullscreenError = function onFullscreenError() {
        if (!self.waitingForPresent_) {
          return;
        }
        self.removeFullscreenWrapper();
        self.removeFullscreenListeners_();
        self.disableWakeLock();
        self.waitingForPresent_ = false;
        self.isPresenting = false;
        reject(new Error('Unable to present.'));
      };
      self.addFullscreenListeners_(fullscreenElement, onFullscreenChange, onFullscreenError);
      if (requestFullscreen(fullscreenElement)) {
        self.enableWakeLock();
        self.waitingForPresent_ = true;
      } else if (isIOS() || isWebViewAndroid()) {
        self.enableWakeLock();
        self.isPresenting = true;
        self.beginPresent_();
        self.fireVRDisplayPresentChange_();
        resolve();
      }
    }
    if (!self.waitingForPresent_ && !isIOS()) {
      exitFullscreen();
      reject(new Error('Unable to present.'));
    }
  });
};
VRDisplay.prototype.exitPresent = function () {
  var wasPresenting = this.isPresenting;
  var self = this;
  this.isPresenting = false;
  this.layer_ = null;
  this.disableWakeLock();
  return new Promise(function (resolve, reject) {
    if (wasPresenting) {
      if (!exitFullscreen() && isIOS()) {
        self.endPresent_();
        self.fireVRDisplayPresentChange_();
      }
      if (isWebViewAndroid()) {
        self.removeFullscreenWrapper();
        self.removeFullscreenListeners_();
        self.endPresent_();
        self.fireVRDisplayPresentChange_();
      }
      resolve();
    } else {
      reject(new Error('Was not presenting to VRDisplay.'));
    }
  });
};
VRDisplay.prototype.getLayers = function () {
  if (this.layer_) {
    return [this.layer_];
  }
  return [];
};
VRDisplay.prototype.fireVRDisplayPresentChange_ = function () {
  var event = new CustomEvent('vrdisplaypresentchange', { detail: { display: this } });
  window.dispatchEvent(event);
};
VRDisplay.prototype.fireVRDisplayConnect_ = function () {
  var event = new CustomEvent('vrdisplayconnect', { detail: { display: this } });
  window.dispatchEvent(event);
};
VRDisplay.prototype.addFullscreenListeners_ = function (element, changeHandler, errorHandler) {
  this.removeFullscreenListeners_();
  this.fullscreenEventTarget_ = element;
  this.fullscreenChangeHandler_ = changeHandler;
  this.fullscreenErrorHandler_ = errorHandler;
  if (changeHandler) {
    if (document.fullscreenEnabled) {
      element.addEventListener('fullscreenchange', changeHandler, false);
    } else if (document.webkitFullscreenEnabled) {
      element.addEventListener('webkitfullscreenchange', changeHandler, false);
    } else if (document.mozFullScreenEnabled) {
      document.addEventListener('mozfullscreenchange', changeHandler, false);
    } else if (document.msFullscreenEnabled) {
      element.addEventListener('msfullscreenchange', changeHandler, false);
    }
  }
  if (errorHandler) {
    if (document.fullscreenEnabled) {
      element.addEventListener('fullscreenerror', errorHandler, false);
    } else if (document.webkitFullscreenEnabled) {
      element.addEventListener('webkitfullscreenerror', errorHandler, false);
    } else if (document.mozFullScreenEnabled) {
      document.addEventListener('mozfullscreenerror', errorHandler, false);
    } else if (document.msFullscreenEnabled) {
      element.addEventListener('msfullscreenerror', errorHandler, false);
    }
  }
};
VRDisplay.prototype.removeFullscreenListeners_ = function () {
  if (!this.fullscreenEventTarget_) return;
  var element = this.fullscreenEventTarget_;
  if (this.fullscreenChangeHandler_) {
    var changeHandler = this.fullscreenChangeHandler_;
    element.removeEventListener('fullscreenchange', changeHandler, false);
    element.removeEventListener('webkitfullscreenchange', changeHandler, false);
    document.removeEventListener('mozfullscreenchange', changeHandler, false);
    element.removeEventListener('msfullscreenchange', changeHandler, false);
  }
  if (this.fullscreenErrorHandler_) {
    var errorHandler = this.fullscreenErrorHandler_;
    element.removeEventListener('fullscreenerror', errorHandler, false);
    element.removeEventListener('webkitfullscreenerror', errorHandler, false);
    document.removeEventListener('mozfullscreenerror', errorHandler, false);
    element.removeEventListener('msfullscreenerror', errorHandler, false);
  }
  this.fullscreenEventTarget_ = null;
  this.fullscreenChangeHandler_ = null;
  this.fullscreenErrorHandler_ = null;
};
VRDisplay.prototype.enableWakeLock = function () {
  if (this.wakelock_) {
    this.wakelock_.enable();
  }
};
VRDisplay.prototype.disableWakeLock = function () {
  if (this.wakelock_) {
    this.wakelock_.disable();
  }
};
VRDisplay.prototype.beginPresent_ = function () {
};
VRDisplay.prototype.endPresent_ = function () {
};
VRDisplay.prototype.submitFrame = function (pose) {
};
VRDisplay.prototype.getEyeParameters = function (whichEye) {
  return null;
};
var config = {
  ADDITIONAL_VIEWERS: [],
  DEFAULT_VIEWER: '',
  MOBILE_WAKE_LOCK: true,
  DEBUG: false,
  DPDB_URL: 'https://dpdb.webvr.rocks/dpdb.json',
  K_FILTER: 0.98,
  PREDICTION_TIME_S: 0.040,
  CARDBOARD_UI_DISABLED: false,
  ROTATE_INSTRUCTIONS_DISABLED: false,
  YAW_ONLY: false,
  BUFFER_SCALE: 0.5,
  DIRTY_SUBMIT_FRAME_BINDINGS: false
};
var Eye = {
  LEFT: 'left',
  RIGHT: 'right'
};
function CardboardVRDisplay(config$$1) {
  var defaults = extend({}, config);
  config$$1 = extend(defaults, config$$1 || {});
  VRDisplay.call(this, {
    wakelock: config$$1.MOBILE_WAKE_LOCK
  });
  this.config = config$$1;
  this.displayName = 'Cardboard VRDisplay';
  this.capabilities = new VRDisplayCapabilities({
    hasPosition: false,
    hasOrientation: true,
    hasExternalDisplay: false,
    canPresent: true,
    maxLayers: 1
  });
  this.stageParameters = null;
  this.bufferScale_ = this.config.BUFFER_SCALE;
  this.poseSensor_ = new PoseSensor(this.config);
  this.distorter_ = null;
  this.cardboardUI_ = null;
  this.dpdb_ = new Dpdb(this.config.DPDB_URL, this.onDeviceParamsUpdated_.bind(this));
  this.deviceInfo_ = new DeviceInfo(this.dpdb_.getDeviceParams(), config$$1.ADDITIONAL_VIEWERS);
  this.viewerSelector_ = new ViewerSelector(config$$1.DEFAULT_VIEWER);
  this.viewerSelector_.onChange(this.onViewerChanged_.bind(this));
  this.deviceInfo_.setViewer(this.viewerSelector_.getCurrentViewer());
  if (!this.config.ROTATE_INSTRUCTIONS_DISABLED) {
    this.rotateInstructions_ = new RotateInstructions();
  }
  if (isIOS()) {
    window.addEventListener('resize', this.onResize_.bind(this));
  }
}
CardboardVRDisplay.prototype = Object.create(VRDisplay.prototype);
CardboardVRDisplay.prototype._getPose = function () {
  return {
    position: null,
    orientation: this.poseSensor_.getOrientation(),
    linearVelocity: null,
    linearAcceleration: null,
    angularVelocity: null,
    angularAcceleration: null
  };
};
CardboardVRDisplay.prototype._resetPose = function () {
  if (this.poseSensor_.resetPose) {
    this.poseSensor_.resetPose();
  }
};
CardboardVRDisplay.prototype._getFieldOfView = function (whichEye) {
  var fieldOfView;
  if (whichEye == Eye.LEFT) {
    fieldOfView = this.deviceInfo_.getFieldOfViewLeftEye();
  } else if (whichEye == Eye.RIGHT) {
    fieldOfView = this.deviceInfo_.getFieldOfViewRightEye();
  } else {
    console.error('Invalid eye provided: %s', whichEye);
    return null;
  }
  return fieldOfView;
};
CardboardVRDisplay.prototype._getEyeOffset = function (whichEye) {
  var offset;
  if (whichEye == Eye.LEFT) {
    offset = [-this.deviceInfo_.viewer.interLensDistance * 0.5, 0.0, 0.0];
  } else if (whichEye == Eye.RIGHT) {
    offset = [this.deviceInfo_.viewer.interLensDistance * 0.5, 0.0, 0.0];
  } else {
    console.error('Invalid eye provided: %s', whichEye);
    return null;
  }
  return offset;
};
CardboardVRDisplay.prototype.getEyeParameters = function (whichEye) {
  var offset = this._getEyeOffset(whichEye);
  var fieldOfView = this._getFieldOfView(whichEye);
  var eyeParams = {
    offset: offset,
    renderWidth: this.deviceInfo_.device.width * 0.5 * this.bufferScale_,
    renderHeight: this.deviceInfo_.device.height * this.bufferScale_
  };
  Object.defineProperty(eyeParams, 'fieldOfView', {
    enumerable: true,
    get: function get() {
      deprecateWarning('VRFieldOfView', 'VRFrameData\'s projection matrices');
      return fieldOfView;
    }
  });
  return eyeParams;
};
CardboardVRDisplay.prototype.onDeviceParamsUpdated_ = function (newParams) {
  if (this.config.DEBUG) {
    console.log('DPDB reported that device params were updated.');
  }
  this.deviceInfo_.updateDeviceParams(newParams);
  if (this.distorter_) {
    this.distorter_.updateDeviceInfo(this.deviceInfo_);
  }
};
CardboardVRDisplay.prototype.updateBounds_ = function () {
  if (this.layer_ && this.distorter_ && (this.layer_.leftBounds || this.layer_.rightBounds)) {
    this.distorter_.setTextureBounds(this.layer_.leftBounds, this.layer_.rightBounds);
  }
};
CardboardVRDisplay.prototype.beginPresent_ = function () {
  var gl = this.layer_.source.getContext('webgl');
  if (!gl) gl = this.layer_.source.getContext('experimental-webgl');
  if (!gl) gl = this.layer_.source.getContext('webgl2');
  if (!gl) return;
  if (this.layer_.predistorted) {
    if (!this.config.CARDBOARD_UI_DISABLED) {
      gl.canvas.width = getScreenWidth() * this.bufferScale_;
      gl.canvas.height = getScreenHeight() * this.bufferScale_;
      this.cardboardUI_ = new CardboardUI(gl);
    }
  } else {
    if (!this.config.CARDBOARD_UI_DISABLED) {
      this.cardboardUI_ = new CardboardUI(gl);
    }
    this.distorter_ = new CardboardDistorter(gl, this.cardboardUI_, this.config.BUFFER_SCALE, this.config.DIRTY_SUBMIT_FRAME_BINDINGS);
    this.distorter_.updateDeviceInfo(this.deviceInfo_);
  }
  if (this.cardboardUI_) {
    this.cardboardUI_.listen(function (e) {
      this.viewerSelector_.show(this.layer_.source.parentElement);
      e.stopPropagation();
      e.preventDefault();
    }.bind(this), function (e) {
      this.exitPresent();
      e.stopPropagation();
      e.preventDefault();
    }.bind(this));
  }
  if (this.rotateInstructions_) {
    if (isLandscapeMode() && isMobile()) {
      this.rotateInstructions_.showTemporarily(3000, this.layer_.source.parentElement);
    } else {
      this.rotateInstructions_.update();
    }
  }
  this.orientationHandler = this.onOrientationChange_.bind(this);
  window.addEventListener('orientationchange', this.orientationHandler);
  this.vrdisplaypresentchangeHandler = this.updateBounds_.bind(this);
  window.addEventListener('vrdisplaypresentchange', this.vrdisplaypresentchangeHandler);
  this.fireVRDisplayDeviceParamsChange_();
};
CardboardVRDisplay.prototype.endPresent_ = function () {
  if (this.distorter_) {
    this.distorter_.destroy();
    this.distorter_ = null;
  }
  if (this.cardboardUI_) {
    this.cardboardUI_.destroy();
    this.cardboardUI_ = null;
  }
  if (this.rotateInstructions_) {
    this.rotateInstructions_.hide();
  }
  this.viewerSelector_.hide();
  window.removeEventListener('orientationchange', this.orientationHandler);
  window.removeEventListener('vrdisplaypresentchange', this.vrdisplaypresentchangeHandler);
};
CardboardVRDisplay.prototype.updatePresent_ = function () {
  this.endPresent_();
  this.beginPresent_();
};
CardboardVRDisplay.prototype.submitFrame = function (pose) {
  if (this.distorter_) {
    this.updateBounds_();
    this.distorter_.submitFrame();
  } else if (this.cardboardUI_ && this.layer_) {
    var gl = this.layer_.source.getContext('webgl');
    if (!gl) gl = this.layer_.source.getContext('experimental-webgl');
    if (!gl) gl = this.layer_.source.getContext('webgl2');
    var canvas = gl.canvas;
    if (canvas.width != this.lastWidth || canvas.height != this.lastHeight) {
      this.cardboardUI_.onResize();
    }
    this.lastWidth = canvas.width;
    this.lastHeight = canvas.height;
    this.cardboardUI_.render();
  }
};
CardboardVRDisplay.prototype.onOrientationChange_ = function (e) {
  this.viewerSelector_.hide();
  if (this.rotateInstructions_) {
    this.rotateInstructions_.update();
  }
  this.onResize_();
};
CardboardVRDisplay.prototype.onResize_ = function (e) {
  if (this.layer_) {
    var gl = this.layer_.source.getContext('webgl');
    if (!gl) gl = this.layer_.source.getContext('experimental-webgl');
    if (!gl) gl = this.layer_.source.getContext('webgl2');
    var cssProperties = ['position: absolute', 'top: 0', 'left: 0',
    'width: 100vw', 'height: 100vh', 'border: 0', 'margin: 0',
    'padding: 0px', 'box-sizing: content-box'];
    gl.canvas.setAttribute('style', cssProperties.join('; ') + ';');
    safariCssSizeWorkaround(gl.canvas);
  }
};
CardboardVRDisplay.prototype.onViewerChanged_ = function (viewer) {
  this.deviceInfo_.setViewer(viewer);
  if (this.distorter_) {
    this.distorter_.updateDeviceInfo(this.deviceInfo_);
  }
  this.fireVRDisplayDeviceParamsChange_();
};
CardboardVRDisplay.prototype.fireVRDisplayDeviceParamsChange_ = function () {
  var event = new CustomEvent('vrdisplaydeviceparamschange', {
    detail: {
      vrdisplay: this,
      deviceInfo: this.deviceInfo_
    }
  });
  window.dispatchEvent(event);
};
CardboardVRDisplay.VRFrameData = VRFrameData;
CardboardVRDisplay.VRDisplay = VRDisplay;
return CardboardVRDisplay;
})));
});
var CardboardVRDisplay = unwrapExports(cardboardVrDisplay);

var version = "0.10.12";

var DefaultConfig = {
  ADDITIONAL_VIEWERS: [],
  DEFAULT_VIEWER: '',
  PROVIDE_MOBILE_VRDISPLAY: true,
  MOBILE_WAKE_LOCK: true,
  DEBUG: false,
  DPDB_URL: 'https://dpdb.webvr.rocks/dpdb.json',
  K_FILTER: 0.98,
  PREDICTION_TIME_S: 0.040,
  CARDBOARD_UI_DISABLED: false,
  ROTATE_INSTRUCTIONS_DISABLED: false,
  YAW_ONLY: false,
  BUFFER_SCALE: 0.5,
  DIRTY_SUBMIT_FRAME_BINDINGS: false
};

function WebVRPolyfill(config) {
  this.config = extend(extend({}, DefaultConfig), config);
  this.polyfillDisplays = [];
  this.enabled = false;
  this.hasNative = 'getVRDisplays' in navigator;
  this.native = {};
  this.native.getVRDisplays = navigator.getVRDisplays;
  this.native.VRFrameData = window.VRFrameData;
  this.native.VRDisplay = window.VRDisplay;
  if (!this.hasNative || this.config.PROVIDE_MOBILE_VRDISPLAY && isMobile()) {
    this.enable();
    this.getVRDisplays().then(function (displays) {
      if (displays && displays[0] && displays[0].fireVRDisplayConnect_) {
        displays[0].fireVRDisplayConnect_();
      }
    });
  }
}
WebVRPolyfill.prototype.getPolyfillDisplays = function () {
  if (this._polyfillDisplaysPopulated) {
    return this.polyfillDisplays;
  }
  if (isMobile()) {
    var vrDisplay = new CardboardVRDisplay({
      ADDITIONAL_VIEWERS: this.config.ADDITIONAL_VIEWERS,
      DEFAULT_VIEWER: this.config.DEFAULT_VIEWER,
      MOBILE_WAKE_LOCK: this.config.MOBILE_WAKE_LOCK,
      DEBUG: this.config.DEBUG,
      DPDB_URL: this.config.DPDB_URL,
      CARDBOARD_UI_DISABLED: this.config.CARDBOARD_UI_DISABLED,
      K_FILTER: this.config.K_FILTER,
      PREDICTION_TIME_S: this.config.PREDICTION_TIME_S,
      ROTATE_INSTRUCTIONS_DISABLED: this.config.ROTATE_INSTRUCTIONS_DISABLED,
      YAW_ONLY: this.config.YAW_ONLY,
      BUFFER_SCALE: this.config.BUFFER_SCALE,
      DIRTY_SUBMIT_FRAME_BINDINGS: this.config.DIRTY_SUBMIT_FRAME_BINDINGS
    });
    this.polyfillDisplays.push(vrDisplay);
  }
  this._polyfillDisplaysPopulated = true;
  return this.polyfillDisplays;
};
WebVRPolyfill.prototype.enable = function () {
  this.enabled = true;
  if (this.hasNative && this.native.VRFrameData) {
    var NativeVRFrameData = this.native.VRFrameData;
    var nativeFrameData = new this.native.VRFrameData();
    var nativeGetFrameData = this.native.VRDisplay.prototype.getFrameData;
    window.VRDisplay.prototype.getFrameData = function (frameData) {
      if (frameData instanceof NativeVRFrameData) {
        nativeGetFrameData.call(this, frameData);
        return;
      }
      nativeGetFrameData.call(this, nativeFrameData);
      frameData.pose = nativeFrameData.pose;
      copyArray(nativeFrameData.leftProjectionMatrix, frameData.leftProjectionMatrix);
      copyArray(nativeFrameData.rightProjectionMatrix, frameData.rightProjectionMatrix);
      copyArray(nativeFrameData.leftViewMatrix, frameData.leftViewMatrix);
      copyArray(nativeFrameData.rightViewMatrix, frameData.rightViewMatrix);
    };
  }
  navigator.getVRDisplays = this.getVRDisplays.bind(this);
  window.VRDisplay = CardboardVRDisplay.VRDisplay;
  window.VRFrameData = CardboardVRDisplay.VRFrameData;
};
WebVRPolyfill.prototype.getVRDisplays = function () {
  var _this = this;
  var config = this.config;
  if (!this.hasNative) {
    return Promise.resolve(this.getPolyfillDisplays());
  }
  return this.native.getVRDisplays.call(navigator).then(function (nativeDisplays) {
    return nativeDisplays.length > 0 ? nativeDisplays : _this.getPolyfillDisplays();
  });
};
WebVRPolyfill.version = version;
WebVRPolyfill.VRFrameData = CardboardVRDisplay.VRFrameData;
WebVRPolyfill.VRDisplay = CardboardVRDisplay.VRDisplay;


var webvrPolyfill = Object.freeze({
	default: WebVRPolyfill
});

var require$$0 = ( webvrPolyfill && WebVRPolyfill ) || webvrPolyfill;

if (typeof commonjsGlobal !== 'undefined' && commonjsGlobal.window) {
  if (!commonjsGlobal.document) {
    commonjsGlobal.document = commonjsGlobal.window.document;
  }
  if (!commonjsGlobal.navigator) {
    commonjsGlobal.navigator = commonjsGlobal.window.navigator;
  }
}
var src = require$$0;

return src;

})));

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{}],51:[function(_dereq_,module,exports){
var newline = /\n/
var newlineChar = '\n'
var whitespace = /\s/

module.exports = function(text, opt) {
    var lines = module.exports.lines(text, opt)
    return lines.map(function(line) {
        return text.substring(line.start, line.end)
    }).join('\n')
}

module.exports.lines = function wordwrap(text, opt) {
    opt = opt||{}

    //zero width results in nothing visible
    if (opt.width === 0 && opt.mode !== 'nowrap') 
        return []

    text = text||''
    var width = typeof opt.width === 'number' ? opt.width : Number.MAX_VALUE
    var start = Math.max(0, opt.start||0)
    var end = typeof opt.end === 'number' ? opt.end : text.length
    var mode = opt.mode

    var measure = opt.measure || monospace
    if (mode === 'pre')
        return pre(measure, text, start, end, width)
    else
        return greedy(measure, text, start, end, width, mode)
}

function idxOf(text, chr, start, end) {
    var idx = text.indexOf(chr, start)
    if (idx === -1 || idx > end)
        return end
    return idx
}

function isWhitespace(chr) {
    return whitespace.test(chr)
}

function pre(measure, text, start, end, width) {
    var lines = []
    var lineStart = start
    for (var i=start; i<end && i<text.length; i++) {
        var chr = text.charAt(i)
        var isNewline = newline.test(chr)

        //If we've reached a newline, then step down a line
        //Or if we've reached the EOF
        if (isNewline || i===end-1) {
            var lineEnd = isNewline ? i : i+1
            var measured = measure(text, lineStart, lineEnd, width)
            lines.push(measured)
            
            lineStart = i+1
        }
    }
    return lines
}

function greedy(measure, text, start, end, width, mode) {
    //A greedy word wrapper based on LibGDX algorithm
    //https://github.com/libgdx/libgdx/blob/master/gdx/src/com/badlogic/gdx/graphics/g2d/BitmapFontCache.java
    var lines = []

    var testWidth = width
    //if 'nowrap' is specified, we only wrap on newline chars
    if (mode === 'nowrap')
        testWidth = Number.MAX_VALUE

    while (start < end && start < text.length) {
        //get next newline position
        var newLine = idxOf(text, newlineChar, start, end)

        //eat whitespace at start of line
        while (start < newLine) {
            if (!isWhitespace( text.charAt(start) ))
                break
            start++
        }

        //determine visible # of glyphs for the available width
        var measured = measure(text, start, newLine, testWidth)

        var lineEnd = start + (measured.end-measured.start)
        var nextStart = lineEnd + newlineChar.length

        //if we had to cut the line before the next newline...
        if (lineEnd < newLine) {
            //find char to break on
            while (lineEnd > start) {
                if (isWhitespace(text.charAt(lineEnd)))
                    break
                lineEnd--
            }
            if (lineEnd === start) {
                if (nextStart > start + newlineChar.length) nextStart--
                lineEnd = nextStart // If no characters to break, show all.
            } else {
                nextStart = lineEnd
                //eat whitespace at end of line
                while (lineEnd > start) {
                    if (!isWhitespace(text.charAt(lineEnd - newlineChar.length)))
                        break
                    lineEnd--
                }
            }
        }
        if (lineEnd >= start) {
            var result = measure(text, start, lineEnd, testWidth)
            lines.push(result)
        }
        start = nextStart
    }
    return lines
}

//determines the visible number of glyphs within a given width
function monospace(text, start, end, width) {
    var glyphs = Math.min(width, end-start)
    return {
        start: start,
        end: start+glyphs
    }
}
},{}],52:[function(_dereq_,module,exports){
"use strict";
var window = _dereq_("global/window")
var isFunction = _dereq_("is-function")
var parseHeaders = _dereq_("parse-headers")
var xtend = _dereq_("xtend")

module.exports = createXHR
// Allow use of default import syntax in TypeScript
module.exports.default = createXHR;
createXHR.XMLHttpRequest = window.XMLHttpRequest || noop
createXHR.XDomainRequest = "withCredentials" in (new createXHR.XMLHttpRequest()) ? createXHR.XMLHttpRequest : window.XDomainRequest

forEachArray(["get", "put", "post", "patch", "head", "delete"], function(method) {
    createXHR[method === "delete" ? "del" : method] = function(uri, options, callback) {
        options = initParams(uri, options, callback)
        options.method = method.toUpperCase()
        return _createXHR(options)
    }
})

function forEachArray(array, iterator) {
    for (var i = 0; i < array.length; i++) {
        iterator(array[i])
    }
}

function isEmpty(obj){
    for(var i in obj){
        if(obj.hasOwnProperty(i)) return false
    }
    return true
}

function initParams(uri, options, callback) {
    var params = uri

    if (isFunction(options)) {
        callback = options
        if (typeof uri === "string") {
            params = {uri:uri}
        }
    } else {
        params = xtend(options, {uri: uri})
    }

    params.callback = callback
    return params
}

function createXHR(uri, options, callback) {
    options = initParams(uri, options, callback)
    return _createXHR(options)
}

function _createXHR(options) {
    if(typeof options.callback === "undefined"){
        throw new Error("callback argument missing")
    }

    var called = false
    var callback = function cbOnce(err, response, body){
        if(!called){
            called = true
            options.callback(err, response, body)
        }
    }

    function readystatechange() {
        if (xhr.readyState === 4) {
            setTimeout(loadFunc, 0)
        }
    }

    function getBody() {
        // Chrome with requestType=blob throws errors arround when even testing access to responseText
        var body = undefined

        if (xhr.response) {
            body = xhr.response
        } else {
            body = xhr.responseText || getXml(xhr)
        }

        if (isJson) {
            try {
                body = JSON.parse(body)
            } catch (e) {}
        }

        return body
    }

    function errorFunc(evt) {
        clearTimeout(timeoutTimer)
        if(!(evt instanceof Error)){
            evt = new Error("" + (evt || "Unknown XMLHttpRequest Error") )
        }
        evt.statusCode = 0
        return callback(evt, failureResponse)
    }

    // will load the data & process the response in a special response object
    function loadFunc() {
        if (aborted) return
        var status
        clearTimeout(timeoutTimer)
        if(options.useXDR && xhr.status===undefined) {
            //IE8 CORS GET successful response doesn't have a status field, but body is fine
            status = 200
        } else {
            status = (xhr.status === 1223 ? 204 : xhr.status)
        }
        var response = failureResponse
        var err = null

        if (status !== 0){
            response = {
                body: getBody(),
                statusCode: status,
                method: method,
                headers: {},
                url: uri,
                rawRequest: xhr
            }
            if(xhr.getAllResponseHeaders){ //remember xhr can in fact be XDR for CORS in IE
                response.headers = parseHeaders(xhr.getAllResponseHeaders())
            }
        } else {
            err = new Error("Internal XMLHttpRequest Error")
        }
        return callback(err, response, response.body)
    }

    var xhr = options.xhr || null

    if (!xhr) {
        if (options.cors || options.useXDR) {
            xhr = new createXHR.XDomainRequest()
        }else{
            xhr = new createXHR.XMLHttpRequest()
        }
    }

    var key
    var aborted
    var uri = xhr.url = options.uri || options.url
    var method = xhr.method = options.method || "GET"
    var body = options.body || options.data
    var headers = xhr.headers = options.headers || {}
    var sync = !!options.sync
    var isJson = false
    var timeoutTimer
    var failureResponse = {
        body: undefined,
        headers: {},
        statusCode: 0,
        method: method,
        url: uri,
        rawRequest: xhr
    }

    if ("json" in options && options.json !== false) {
        isJson = true
        headers["accept"] || headers["Accept"] || (headers["Accept"] = "application/json") //Don't override existing accept header declared by user
        if (method !== "GET" && method !== "HEAD") {
            headers["content-type"] || headers["Content-Type"] || (headers["Content-Type"] = "application/json") //Don't override existing accept header declared by user
            body = JSON.stringify(options.json === true ? body : options.json)
        }
    }

    xhr.onreadystatechange = readystatechange
    xhr.onload = loadFunc
    xhr.onerror = errorFunc
    // IE9 must have onprogress be set to a unique function.
    xhr.onprogress = function () {
        // IE must die
    }
    xhr.onabort = function(){
        aborted = true;
    }
    xhr.ontimeout = errorFunc
    xhr.open(method, uri, !sync, options.username, options.password)
    //has to be after open
    if(!sync) {
        xhr.withCredentials = !!options.withCredentials
    }
    // Cannot set timeout with sync request
    // not setting timeout on the xhr object, because of old webkits etc. not handling that correctly
    // both npm's request and jquery 1.x use this kind of timeout, so this is being consistent
    if (!sync && options.timeout > 0 ) {
        timeoutTimer = setTimeout(function(){
            if (aborted) return
            aborted = true//IE9 may still call readystatechange
            xhr.abort("timeout")
            var e = new Error("XMLHttpRequest timeout")
            e.code = "ETIMEDOUT"
            errorFunc(e)
        }, options.timeout )
    }

    if (xhr.setRequestHeader) {
        for(key in headers){
            if(headers.hasOwnProperty(key)){
                xhr.setRequestHeader(key, headers[key])
            }
        }
    } else if (options.headers && !isEmpty(options.headers)) {
        throw new Error("Headers cannot be set on an XDomainRequest object")
    }

    if ("responseType" in options) {
        xhr.responseType = options.responseType
    }

    if ("beforeSend" in options &&
        typeof options.beforeSend === "function"
    ) {
        options.beforeSend(xhr)
    }

    // Microsoft Edge browser sends "undefined" when send is called with undefined value.
    // XMLHttpRequest spec says to pass null as body to indicate no body
    // See https://github.com/naugtur/xhr/issues/100.
    xhr.send(body || null)

    return xhr


}

function getXml(xhr) {
    // xhr.responseXML will throw Exception "InvalidStateError" or "DOMException"
    // See https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/responseXML.
    try {
        if (xhr.responseType === "document") {
            return xhr.responseXML
        }
        var firefoxBugTakenEffect = xhr.responseXML && xhr.responseXML.documentElement.nodeName === "parsererror"
        if (xhr.responseType === "" && !firefoxBugTakenEffect) {
            return xhr.responseXML
        }
    } catch (e) {}

    return null
}

function noop() {}

},{"global/window":17,"is-function":22,"parse-headers":32,"xtend":54}],53:[function(_dereq_,module,exports){
module.exports = (function xmlparser() {
  //common browsers
  if (typeof self.DOMParser !== 'undefined') {
    return function(str) {
      var parser = new self.DOMParser()
      return parser.parseFromString(str, 'application/xml')
    }
  } 

  //IE8 fallback
  if (typeof self.ActiveXObject !== 'undefined'
      && new self.ActiveXObject('Microsoft.XMLDOM')) {
    return function(str) {
      var xmlDoc = new self.ActiveXObject("Microsoft.XMLDOM")
      xmlDoc.async = "false"
      xmlDoc.loadXML(str)
      return xmlDoc
    }
  }

  //last resort fallback
  return function(str) {
    var div = document.createElement('div')
    div.innerHTML = str
    return div
  }
})()

},{}],54:[function(_dereq_,module,exports){
module.exports = extend

var hasOwnProperty = Object.prototype.hasOwnProperty;

function extend() {
    var target = {}

    for (var i = 0; i < arguments.length; i++) {
        var source = arguments[i]

        for (var key in source) {
            if (hasOwnProperty.call(source, key)) {
                target[key] = source[key]
            }
        }
    }

    return target
}

},{}],55:[function(_dereq_,module,exports){
module.exports={
  "name": "aframe",
  "version": "1.2.0",
  "description": "A web framework for building virtual reality experiences.",
  "homepage": "https://aframe.io/",
  "main": "dist/aframe-master.js",
  "scripts": {
    "browserify": "browserify src/index.js -s 'AFRAME' -p browserify-derequire",
    "build": "shx mkdir -p build/ && npm run browserify -- --debug -t [ envify --INSPECTOR_VERSION dev ] -o build/aframe.js",
    "codecov": "codecov",
    "dev": "npm run build && cross-env INSPECTOR_VERSION=dev node ./scripts/budo -t envify",
    "dist": "node scripts/updateVersionLog.js && npm run dist:min && npm run dist:max",
    "dist:max": "npm run browserify -s -- --debug | exorcist dist/aframe-master.js.map > dist/aframe-master.js",
    "dist:min": "npm run browserify -s -- --debug -p [ minifyify --map aframe-master.min.js.map --output dist/aframe-master.min.js.map ] -o dist/aframe-master.min.js",
    "docs": "markserv --dir docs --port 9001",
    "preghpages": "node ./scripts/preghpages.js",
    "ghpages": "ghpages -p gh-pages/",
    "lint": "semistandard -v | snazzy",
    "lint:fix": "semistandard --fix",
    "precommit": "npm run lint",
    "prepush": "node scripts/testOnlyCheck.js",
    "prerelease": "cross-env FOR_RELEASE=true node scripts/release.js 1.1.0 1.2.0",
    "start": "npm run dev",
    "start:https": "cross-env SSL=true npm run dev",
    "test": "karma start ./tests/karma.conf.js",
    "test:docs": "node scripts/docsLint.js",
    "test:firefox": "npm test -- --browsers Firefox",
    "test:chrome": "npm test -- --browsers Chrome",
    "test:nobrowser": "NO_BROWSER=true npm test",
    "test:node": "mocha --ui tdd tests/node"
  },
  "repository": "aframevr/aframe",
  "license": "MIT",
  "files": [
    "dist/*",
    "docs/**/*",
    "src/**/*",
    "vendor/**/*"
  ],
  "dependencies": {
    "custom-event-polyfill": "^1.0.6",
    "debug": "ngokevin/debug#noTimestamp",
    "deep-assign": "^2.0.0",
    "document-register-element": "dmarcos/document-register-element#8ccc532b7f3744be954574caf3072a5fd260ca90",
    "load-bmfont": "^1.2.3",
    "object-assign": "^4.0.1",
    "present": "0.0.6",
    "promise-polyfill": "^3.1.0",
    "super-animejs": "^3.1.0",
    "super-three": "^0.125.1",
    "three-bmfont-text": "dmarcos/three-bmfont-text#1babdf8507c731a18f8af3b807292e2b9740955e",
    "webvr-polyfill": "^0.10.12"
  },
  "devDependencies": {
    "browserify": "^13.1.0",
    "browserify-css": "^0.8.4",
    "browserify-derequire": "^0.9.4",
    "browserify-istanbul": "^2.0.0",
    "budo": "^9.2.0",
    "chai": "^3.5.0",
    "chai-shallow-deep-equal": "^1.4.0",
    "chalk": "^1.1.3",
    "codecov": "^1.0.1",
    "cross-env": "^5.0.1",
    "envify": "^3.4.1",
    "exorcist": "^0.4.0",
    "ghpages": "0.0.8",
    "git-rev": "^0.2.1",
    "glob": "^7.1.1",
    "husky": "^0.11.7",
    "istanbul": "^0.4.5",
    "jsdom": "^9.11.0",
    "karma": "1.4.1",
    "karma-browserify": "^5.1.0",
    "karma-chai-shallow-deep-equal": "0.0.4",
    "karma-chrome-launcher": "^2.0.0",
    "karma-coverage": "^1.1.1",
    "karma-env-preprocessor": "^0.1.1",
    "karma-firefox-launcher": "^1.2.0",
    "karma-mocha": "^1.1.1",
    "karma-mocha-reporter": "^2.1.0",
    "karma-sinon-chai": "1.2.4",
    "lolex": "^1.5.1",
    "markserv": "github:sukima/markserv#feature/fix-broken-websoketio-link",
    "minifyify": "^7.3.3",
    "mocha": "^3.0.2",
    "mozilla-download": "^1.1.1",
    "replace-in-file": "^2.5.3",
    "semistandard": "^9.0.0",
    "shelljs": "^0.7.7",
    "shx": "^0.2.2",
    "sinon": "^1.17.5",
    "sinon-chai": "2.8.0",
    "snazzy": "^5.0.0",
    "too-wordy": "ngokevin/too-wordy",
    "uglifyjs": "^2.4.10",
    "write-good": "^0.9.1"
  },
  "link": true,
  "browserify": {
    "transform": [
      "browserify-css",
      "envify"
    ]
  },
  "semistandard": {
    "ignore": [
      "build/**",
      "dist/**",
      "examples/**/shaders/*.js",
      "**/vendor/**"
    ]
  },
  "keywords": [
    "3d",
    "aframe",
    "cardboard",
    "components",
    "oculus",
    "three",
    "three.js",
    "rift",
    "vive",
    "vr",
    "web-components",
    "webvr"
  ],
  "browserify-css": {
    "minify": true
  },
  "engines": {
    "node": ">= 4.6.0",
    "npm": "^2.15.9"
  }
}

},{}],56:[function(_dereq_,module,exports){
var anime = _dereq_('super-animejs');
var components = _dereq_('../core/component').components;
var registerComponent = _dereq_('../core/component').registerComponent;
var THREE = _dereq_('../lib/three');
var utils = _dereq_('../utils');

var colorHelperFrom = new THREE.Color();
var colorHelperTo = new THREE.Color();

var getComponentProperty = utils.entity.getComponentProperty;
var setComponentProperty = utils.entity.setComponentProperty;
var splitCache = {};

var TYPE_COLOR = 'color';
var PROP_POSITION = 'position';
var PROP_ROTATION = 'rotation';
var PROP_SCALE = 'scale';
var STRING_COMPONENTS = 'components';
var STRING_OBJECT3D = 'object3D';

/**
 * Animation component for A-Frame using anime.js.
 *
 * The component manually controls the tick by setting `autoplay: false` on anime.js and
 * manually * calling `animation.tick()` in the tick handler. To pause or resume, we toggle a
 * boolean * flag * `isAnimationPlaying`.
 *
 * anime.js animation config for tweenining Javascript objects and values works as:
 *
 *  config = {
 *    targets: {foo: 0.0, bar: '#000'},
 *    foo: 1.0,
 *    bar: '#FFF'
 *  }
 *
 * The above will tween each property in `targets`. The `to` values are set in the root of
 * the config.
 *
 * @member {object} animation - anime.js instance.
 * @member {boolean} animationIsPlaying - Control if animation is playing.
 */
module.exports.Component = registerComponent('animation', {
  schema: {
    autoplay: {default: true},
    delay: {default: 0},
    dir: {default: ''},
    dur: {default: 1000},
    easing: {default: 'easeInQuad'},
    elasticity: {default: 400},
    enabled: {default: true},
    from: {default: ''},
    loop: {
      default: 0,
      parse: function (value) {
        // Boolean or integer.
        if (value === true || value === 'true') { return true; }
        if (value === false || value === 'false') { return false; }
        return parseInt(value, 10);
      }
    },
    property: {default: ''},
    startEvents: {type: 'array'},
    pauseEvents: {type: 'array'},
    resumeEvents: {type: 'array'},
    round: {default: false},
    to: {default: ''},
    type: {default: ''},
    isRawProperty: {default: false}
  },

  multiple: true,

  init: function () {
    var self = this;

    this.eventDetail = {name: this.attrName};
    this.time = 0;

    this.animation = null;
    this.animationIsPlaying = false;
    this.onStartEvent = this.onStartEvent.bind(this);
    this.beginAnimation = this.beginAnimation.bind(this);
    this.pauseAnimation = this.pauseAnimation.bind(this);
    this.resumeAnimation = this.resumeAnimation.bind(this);

    this.fromColor = {};
    this.toColor = {};
    this.targets = {};
    this.targetsArray = [];

    this.updateConfigForDefault = this.updateConfigForDefault.bind(this);
    this.updateConfigForRawColor = this.updateConfigForRawColor.bind(this);

    this.config = {
      complete: function () {
        self.animationIsPlaying = false;
        self.el.emit('animationcomplete', self.eventDetail, false);
        if (self.id) {
          self.el.emit('animationcomplete__' + self.id, self.eventDetail, false);
        }
      }
    };
  },

  update: function (oldData) {
    var config = this.config;
    var data = this.data;

    this.animationIsPlaying = false;

    if (!this.data.enabled) { return; }

    if (!data.property) { return; }

    // Base config.
    config.autoplay = false;
    config.direction = data.dir;
    config.duration = data.dur;
    config.easing = data.easing;
    config.elasticity = data.elasticity;
    config.loop = data.loop;
    config.round = data.round;

    // Start new animation.
    this.createAndStartAnimation();
  },

  tick: function (t, dt) {
    if (!this.animationIsPlaying) { return; }
    this.time += dt;
    this.animation.tick(this.time);
  },

  remove: function () {
    this.pauseAnimation();
    this.removeEventListeners();
  },

  pause: function () {
    this.paused = true;
    this.pausedWasPlaying = this.animationIsPlaying;
    this.pauseAnimation();
    this.removeEventListeners();
  },

  /**
   * `play` handler only for resuming scene.
   */
  play: function () {
    if (!this.paused) { return; }
    this.paused = false;
    this.addEventListeners();
    if (this.pausedWasPlaying) {
      this.resumeAnimation();
      this.pausedWasPlaying = false;
    }
  },

  /**
   * Start animation from scratch.
   */
  createAndStartAnimation: function () {
    var data = this.data;

    this.updateConfig();
    this.animationIsPlaying = false;
    this.animation = anime(this.config);
    this.animation.began = true;

    this.removeEventListeners();
    this.addEventListeners();

    // Wait for start events for animation.
    if (!data.autoplay || data.startEvents && data.startEvents.length) { return; }

    // Delay animation.
    if (data.delay) {
      setTimeout(this.beginAnimation, data.delay);
      return;
    }

    // Play animation.
    this.beginAnimation();
  },

  /**
   * This is before animation start (including from startEvents).
   * Set to initial state (config.from, time = 0, seekTime = 0).
   */
  beginAnimation: function () {
    this.updateConfig();
    this.animation.began = true;
    this.time = 0;
    this.animationIsPlaying = true;
    this.stopRelatedAnimations();
    this.el.emit('animationbegin', this.eventDetail, false);
  },

  pauseAnimation: function () {
    this.animationIsPlaying = false;
  },

  resumeAnimation: function () {
    this.animationIsPlaying = true;
  },

  /**
   * startEvents callback.
   */
  onStartEvent: function () {
    if (!this.data.enabled) { return; }

    this.updateConfig();
    if (this.animation) {
      this.animation.pause();
    }
    this.animation = anime(this.config);

    // Include the delay before each start event.
    if (this.data.delay) {
      setTimeout(this.beginAnimation, this.data.delay);
      return;
    }
    this.beginAnimation();
  },

  /**
   * rawProperty: true and type: color;
   */
  updateConfigForRawColor: function () {
    var config = this.config;
    var data = this.data;
    var el = this.el;
    var from;
    var key;
    var to;

    if (this.waitComponentInitRawProperty(this.updateConfigForRawColor)) {
      return;
    }

    from = data.from === '' ? getRawProperty(el, data.property) : data.from;
    to = data.to;

    // Use r/g/b vector for color type.
    this.setColorConfig(from, to);
    from = this.fromColor;
    to = this.toColor;

    this.targetsArray.length = 0;
    this.targetsArray.push(from);
    config.targets = this.targetsArray;
    for (key in to) { config[key] = to[key]; }

    config.update = (function () {
      var lastValue = {};
      return function (anim) {
        var value;
        value = anim.animatables[0].target;
        // For animation timeline.
        if (value.r === lastValue.r &&
            value.g === lastValue.g &&
            value.b === lastValue.b) { return; }

        setRawProperty(el, data.property, value, data.type);
      };
    })();
  },

  /**
   * Stuff property into generic `property` key.
   */
  updateConfigForDefault: function () {
    var config = this.config;
    var data = this.data;
    var el = this.el;
    var from;
    var isBoolean;
    var isNumber;
    var to;

    if (this.waitComponentInitRawProperty(this.updateConfigForDefault)) {
      return;
    }

    if (data.from === '') {
      // Infer from.
      from = isRawProperty(data)
        ? getRawProperty(el, data.property)
        : getComponentProperty(el, data.property);
    } else {
      // Explicit from.
      from = data.from;
    }

    to = data.to;

    isNumber = !isNaN(from || to);
    if (isNumber) {
      from = parseFloat(from);
      to = parseFloat(to);
    } else {
      from = from ? from.toString() : from;
      to = to ? to.toString() : to;
    }

    // Convert booleans to integer to allow boolean flipping.
    isBoolean = data.to === 'true' || data.to === 'false' ||
                data.to === true || data.to === false;
    if (isBoolean) {
      from = data.from === 'true' || data.from === true ? 1 : 0;
      to = data.to === 'true' || data.to === true ? 1 : 0;
    }

    this.targets.aframeProperty = from;
    config.targets = this.targets;
    config.aframeProperty = to;
    config.update = (function () {
      var lastValue;

      return function (anim) {
        var value;
        value = anim.animatables[0].target.aframeProperty;

        // Need to do a last value check for animation timeline since all the tweening
        // begins simultaenously even if the value has not changed. Also better for perf
        // anyways.
        if (value === lastValue) { return; }
        lastValue = value;

        if (isBoolean) { value = value >= 1; }

        if (isRawProperty(data)) {
          setRawProperty(el, data.property, value, data.type);
        } else {
          setComponentProperty(el, data.property, value);
        }
      };
    })();
  },

  /**
   * Extend x/y/z/w onto the config.
   * Update vector by modifying object3D.
   */
  updateConfigForVector: function () {
    var config = this.config;
    var data = this.data;
    var el = this.el;
    var key;
    var from;
    var to;

    // Parse coordinates.
    from = data.from !== ''
      ? utils.coordinates.parse(data.from)  // If data.from defined, use that.
      : getComponentProperty(el, data.property);  // If data.from not defined, get on the fly.
    to = utils.coordinates.parse(data.to);

    if (data.property === PROP_ROTATION) {
      toRadians(from);
      toRadians(to);
    }

    // Set to and from.
    this.targetsArray.length = 0;
    this.targetsArray.push(from);
    config.targets = this.targetsArray;
    for (key in to) { config[key] = to[key]; }

    // If animating object3D transformation, run more optimized updater.
    if (data.property === PROP_POSITION || data.property === PROP_ROTATION ||
        data.property === PROP_SCALE) {
      config.update = (function () {
        var lastValue = {};
        return function (anim) {
          var value = anim.animatables[0].target;

          if (data.property === PROP_SCALE) {
            value.x = Math.max(0.0001, value.x);
            value.y = Math.max(0.0001, value.y);
            value.z = Math.max(0.0001, value.z);
          }

          // For animation timeline.
          if (value.x === lastValue.x &&
              value.y === lastValue.y &&
              value.z === lastValue.z) { return; }

          lastValue.x = value.x;
          lastValue.y = value.y;
          lastValue.z = value.z;

          el.object3D[data.property].set(value.x, value.y, value.z);
        };
      })();
      return;
    }

    // Animating some vector.
    config.update = (function () {
      var lastValue = {};
      return function (anim) {
        var value = anim.animatables[0].target;

        // Animate rotation through radians.
        // For animation timeline.
        if (value.x === lastValue.x &&
            value.y === lastValue.y &&
            value.z === lastValue.z) { return; }
        lastValue.x = value.x;
        lastValue.y = value.y;
        lastValue.z = value.z;
        setComponentProperty(el, data.property, value);
      };
    })();
  },

  /**
   * Update the config before each run.
   */
  updateConfig: function () {
    var propType;

    // Route config type.
    propType = getPropertyType(this.el, this.data.property);
    if (isRawProperty(this.data) && this.data.type === TYPE_COLOR) {
      this.updateConfigForRawColor();
    } else if (propType === 'vec2' || propType === 'vec3' || propType === 'vec4') {
      this.updateConfigForVector();
    } else {
      this.updateConfigForDefault();
    }
  },

  /**
   * Wait for component to initialize.
   */
  waitComponentInitRawProperty: function (cb) {
    var componentName;
    var data = this.data;
    var el = this.el;
    var self = this;

    if (data.from !== '') { return false; }

    if (!data.property.startsWith(STRING_COMPONENTS)) { return false; }

    componentName = splitDot(data.property)[1];
    if (el.components[componentName]) { return false; }

    el.addEventListener('componentinitialized', function wait (evt) {
      if (evt.detail.name !== componentName) { return; }
      cb();
      // Since the config was created async, create the animation now since we missed it
      // earlier.
      self.animation = anime(self.config);
      el.removeEventListener('componentinitialized', wait);
    });
    return true;
  },

  /**
   * Make sure two animations on the same property don't fight each other.
   * e.g., animation__mouseenter="property: material.opacity"
   *       animation__mouseleave="property: material.opacity"
   */
  stopRelatedAnimations: function () {
    var component;
    var componentName;
    for (componentName in this.el.components) {
      component = this.el.components[componentName];
      if (componentName === this.attrName) { continue; }
      if (component.name !== 'animation') { continue; }
      if (!component.animationIsPlaying) { continue; }
      if (component.data.property !== this.data.property) { continue; }
      component.animationIsPlaying = false;
    }
  },

  addEventListeners: function () {
    var data = this.data;
    var el = this.el;
    addEventListeners(el, data.startEvents, this.onStartEvent);
    addEventListeners(el, data.pauseEvents, this.pauseAnimation);
    addEventListeners(el, data.resumeEvents, this.resumeAnimation);
  },

  removeEventListeners: function () {
    var data = this.data;
    var el = this.el;
    removeEventListeners(el, data.startEvents, this.onStartEvent);
    removeEventListeners(el, data.pauseEvents, this.pauseAnimation);
    removeEventListeners(el, data.resumeEvents, this.resumeAnimation);
  },

  setColorConfig: function (from, to) {
    colorHelperFrom.set(from);
    colorHelperTo.set(to);
    from = this.fromColor;
    to = this.toColor;
    from.r = colorHelperFrom.r;
    from.g = colorHelperFrom.g;
    from.b = colorHelperFrom.b;
    to.r = colorHelperTo.r;
    to.g = colorHelperTo.g;
    to.b = colorHelperTo.b;
  }
});

/**
 * Given property name, check schema to see what type we are animating.
 * We just care whether the property is a vector.
 */
function getPropertyType (el, property) {
  var component;
  var componentName;
  var split;
  var propertyName;

  split = property.split('.');
  componentName = split[0];
  propertyName = split[1];
  component = el.components[componentName] || components[componentName];

  // Primitives.
  if (!component) { return null; }

  // Dynamic schema. We only care about vectors anyways.
  if (propertyName && !component.schema[propertyName]) { return null; }

  // Multi-prop.
  if (propertyName) { return component.schema[propertyName].type; }

  // Single-prop.
  return component.schema.type;
}

/**
 * Convert object to radians.
 */
function toRadians (obj) {
  obj.x = THREE.Math.degToRad(obj.x);
  obj.y = THREE.Math.degToRad(obj.y);
  obj.z = THREE.Math.degToRad(obj.z);
}

function addEventListeners (el, eventNames, handler) {
  var i;
  for (i = 0; i < eventNames.length; i++) {
    el.addEventListener(eventNames[i], handler);
  }
}

function removeEventListeners (el, eventNames, handler) {
  var i;
  for (i = 0; i < eventNames.length; i++) {
    el.removeEventListener(eventNames[i], handler);
  }
}

function getRawProperty (el, path) {
  var i;
  var split;
  var value;
  split = splitDot(path);
  value = el;
  for (i = 0; i < split.length; i++) {
    value = value[split[i]];
  }
  if (value === undefined) {
    console.log(el);
    throw new Error('[animation] property (' + path + ') could not be found');
  }
  return value;
}

function setRawProperty (el, path, value, type) {
  var i;
  var split;
  var propertyName;
  var targetValue;

  if (path.startsWith('object3D.rotation')) {
    value = THREE.Math.degToRad(value);
  }

  // Walk.
  split = splitDot(path);
  targetValue = el;
  for (i = 0; i < split.length - 1; i++) { targetValue = targetValue[split[i]]; }
  propertyName = split[split.length - 1];

  // Raw color.
  if (type === TYPE_COLOR) {
    if ('r' in targetValue[propertyName]) {
      targetValue[propertyName].r = value.r;
      targetValue[propertyName].g = value.g;
      targetValue[propertyName].b = value.b;
    } else {
      targetValue[propertyName].x = value.r;
      targetValue[propertyName].y = value.g;
      targetValue[propertyName].z = value.b;
    }
    return;
  }

  targetValue[propertyName] = value;
}

function splitDot (path) {
  if (path in splitCache) { return splitCache[path]; }
  splitCache[path] = path.split('.');
  return splitCache[path];
}

function isRawProperty (data) {
  return data.isRawProperty || data.property.startsWith(STRING_COMPONENTS) ||
         data.property.startsWith(STRING_OBJECT3D);
}

},{"../core/component":113,"../lib/three":161,"../utils":187,"super-animejs":36}],57:[function(_dereq_,module,exports){
var registerComponent = _dereq_('../core/component').registerComponent;
var THREE = _dereq_('../lib/three');

/**
 * Camera component.
 * Pairs along with camera system to handle tracking the active camera.
 */
module.exports.Component = registerComponent('camera', {
  schema: {
    active: {default: true},
    far: {default: 10000},
    fov: {default: 80, min: 0},
    near: {default: 0.005, min: 0},
    spectator: {default: false},
    zoom: {default: 1, min: 0}
  },

  /**
   * Initialize three.js camera and add it to the entity.
   * Add reference from scene to this entity as the camera.
   */
  init: function () {
    var camera;
    var el = this.el;

    // Create camera.
    camera = this.camera = new THREE.PerspectiveCamera();
    el.setObject3D('camera', camera);
  },

  /**
   * Update three.js camera.
   */
  update: function (oldData) {
    var data = this.data;
    var camera = this.camera;

    // Update properties.
    camera.aspect = data.aspect || (window.innerWidth / window.innerHeight);
    camera.far = data.far;
    camera.fov = data.fov;
    camera.near = data.near;
    camera.zoom = data.zoom;
    camera.updateProjectionMatrix();

    this.updateActiveCamera(oldData);
    this.updateSpectatorCamera(oldData);
  },

  updateActiveCamera: function (oldData) {
    var data = this.data;
    var el = this.el;
    var system = this.system;
    // Active property did not change.
    if (oldData && oldData.active === data.active || data.spectator) { return; }

    // If `active` property changes, or first update, handle active camera with system.
    if (data.active && system.activeCameraEl !== el) {
      // Camera enabled. Set camera to this camera.
      system.setActiveCamera(el);
    } else if (!data.active && system.activeCameraEl === el) {
      // Camera disabled. Set camera to another camera.
      system.disableActiveCamera();
    }
  },

  updateSpectatorCamera: function (oldData) {
    var data = this.data;
    var el = this.el;
    var system = this.system;
    // spectator property did not change.
    if (oldData && oldData.spectator === data.spectator) { return; }

    // If `spectator` property changes, or first update, handle spectator camera with system.
    if (data.spectator && system.spectatorCameraEl !== el) {
      // Camera enabled. Set camera to this camera.
      system.setSpectatorCamera(el);
    } else if (!data.spectator && system.spectatorCameraEl === el) {
      // Camera disabled. Set camera to another camera.
      system.disableSpectatorCamera();
    }
  },

  /**
   * Remove camera on remove (callback).
   */
  remove: function () {
    this.el.removeObject3D('camera');
  }
});

},{"../core/component":113,"../lib/three":161}],58:[function(_dereq_,module,exports){
/* global THREE */
var registerComponent = _dereq_('../core/component').registerComponent;
var utils = _dereq_('../utils/');

var bind = utils.bind;

var EVENTS = {
  CLICK: 'click',
  FUSING: 'fusing',
  MOUSEENTER: 'mouseenter',
  MOUSEDOWN: 'mousedown',
  MOUSELEAVE: 'mouseleave',
  MOUSEUP: 'mouseup'
};

var STATES = {
  FUSING: 'cursor-fusing',
  HOVERING: 'cursor-hovering',
  HOVERED: 'cursor-hovered'
};

var CANVAS_EVENTS = {
  DOWN: ['mousedown', 'touchstart'],
  UP: ['mouseup', 'touchend']
};

var WEBXR_EVENTS = {
  DOWN: ['selectstart'],
  UP: ['selectend']
};

var CANVAS_HOVER_CLASS = 'a-mouse-cursor-hover';

/**
 * Cursor component. Applies the raycaster component specifically for starting the raycaster
 * from the camera and pointing from camera's facing direction, and then only returning the
 * closest intersection. Cursor can be fine-tuned by setting raycaster properties.
 *
 * @member {object} fuseTimeout - Timeout to trigger fuse-click.
 * @member {Element} cursorDownEl - Entity that was last mousedowned during current click.
 * @member {object} intersection - Attributes of the current intersection event, including
 *         3D- and 2D-space coordinates. See: http://threejs.org/docs/api/core/Raycaster.html
 * @member {Element} intersectedEl - Currently-intersected entity. Used to keep track to
 *         emit events when unintersecting.
 */
module.exports.Component = registerComponent('cursor', {
  dependencies: ['raycaster'],

  schema: {
    downEvents: {default: []},
    fuse: {default: utils.device.isMobile()},
    fuseTimeout: {default: 1500, min: 0},
    mouseCursorStylesEnabled: {default: true},
    upEvents: {default: []},
    rayOrigin: {default: 'entity', oneOf: ['mouse', 'entity']}
  },

  init: function () {
    var self = this;

    this.fuseTimeout = undefined;
    this.cursorDownEl = null;
    this.intersectedEl = null;
    this.canvasBounds = document.body.getBoundingClientRect();
    this.isCursorDown = false;

    // Debounce.
    this.updateCanvasBounds = utils.debounce(function updateCanvasBounds () {
      self.canvasBounds = self.el.sceneEl.canvas.getBoundingClientRect();
    }, 500);

    this.eventDetail = {};
    this.intersectedEventDetail = {cursorEl: this.el};

    // Bind methods.
    this.onCursorDown = bind(this.onCursorDown, this);
    this.onCursorUp = bind(this.onCursorUp, this);
    this.onIntersection = bind(this.onIntersection, this);
    this.onIntersectionCleared = bind(this.onIntersectionCleared, this);
    this.onMouseMove = bind(this.onMouseMove, this);
    this.onEnterVR = bind(this.onEnterVR, this);
  },

  update: function (oldData) {
    if (this.data.rayOrigin === oldData.rayOrigin) { return; }
    this.updateMouseEventListeners();
  },

  play: function () {
    this.addEventListeners();
  },

  pause: function () {
    this.removeEventListeners();
  },

  remove: function () {
    var el = this.el;
    el.removeState(STATES.HOVERING);
    el.removeState(STATES.FUSING);
    clearTimeout(this.fuseTimeout);
    if (this.intersectedEl) { this.intersectedEl.removeState(STATES.HOVERED); }
    this.removeEventListeners();
  },

  addEventListeners: function () {
    var canvas;
    var data = this.data;
    var el = this.el;
    var self = this;

    function addCanvasListeners () {
      canvas = el.sceneEl.canvas;
      if (data.downEvents.length || data.upEvents.length) { return; }
      CANVAS_EVENTS.DOWN.forEach(function (downEvent) {
        canvas.addEventListener(downEvent, self.onCursorDown);
      });
      CANVAS_EVENTS.UP.forEach(function (upEvent) {
        canvas.addEventListener(upEvent, self.onCursorUp);
      });
    }

    canvas = el.sceneEl.canvas;
    if (canvas) {
      addCanvasListeners();
    } else {
      el.sceneEl.addEventListener('render-target-loaded', addCanvasListeners);
    }

    data.downEvents.forEach(function (downEvent) {
      el.addEventListener(downEvent, self.onCursorDown);
    });
    data.upEvents.forEach(function (upEvent) {
      el.addEventListener(upEvent, self.onCursorUp);
    });
    el.addEventListener('raycaster-intersection', this.onIntersection);
    el.addEventListener('raycaster-intersection-cleared', this.onIntersectionCleared);

    el.sceneEl.addEventListener('rendererresize', this.updateCanvasBounds);
    el.sceneEl.addEventListener('enter-vr', this.onEnterVR);
    window.addEventListener('resize', this.updateCanvasBounds);
    window.addEventListener('scroll', this.updateCanvasBounds);

    this.updateMouseEventListeners();
  },

  removeEventListeners: function () {
    var canvas;
    var data = this.data;
    var el = this.el;
    var self = this;

    canvas = el.sceneEl.canvas;
    if (canvas && !data.downEvents.length && !data.upEvents.length) {
      CANVAS_EVENTS.DOWN.forEach(function (downEvent) {
        canvas.removeEventListener(downEvent, self.onCursorDown);
      });
      CANVAS_EVENTS.UP.forEach(function (upEvent) {
        canvas.removeEventListener(upEvent, self.onCursorUp);
      });
    }

    data.downEvents.forEach(function (downEvent) {
      el.removeEventListener(downEvent, self.onCursorDown);
    });
    data.upEvents.forEach(function (upEvent) {
      el.removeEventListener(upEvent, self.onCursorUp);
    });
    el.removeEventListener('raycaster-intersection', this.onIntersection);
    el.removeEventListener('raycaster-intersection-cleared', this.onIntersectionCleared);
    canvas.removeEventListener('mousemove', this.onMouseMove);
    canvas.removeEventListener('touchstart', this.onMouseMove);
    canvas.removeEventListener('touchmove', this.onMouseMove);

    el.sceneEl.removeEventListener('rendererresize', this.updateCanvasBounds);
    el.sceneEl.removeEventListener('enter-vr', this.onEnterVR);
    window.removeEventListener('resize', this.updateCanvasBounds);
    window.removeEventListener('scroll', this.updateCanvasBounds);
  },

  updateMouseEventListeners: function () {
    var canvas;
    var el = this.el;

    canvas = el.sceneEl.canvas;
    canvas.removeEventListener('mousemove', this.onMouseMove);
    canvas.removeEventListener('touchmove', this.onMouseMove);
    el.setAttribute('raycaster', 'useWorldCoordinates', false);
    if (this.data.rayOrigin !== 'mouse') { return; }
    canvas.addEventListener('mousemove', this.onMouseMove, false);
    canvas.addEventListener('touchmove', this.onMouseMove, false);
    el.setAttribute('raycaster', 'useWorldCoordinates', true);
    this.updateCanvasBounds();
  },

  onMouseMove: (function () {
    var direction = new THREE.Vector3();
    var mouse = new THREE.Vector2();
    var origin = new THREE.Vector3();
    var rayCasterConfig = {origin: origin, direction: direction};

    return function (evt) {
      var bounds = this.canvasBounds;
      var camera = this.el.sceneEl.camera;
      var left;
      var point;
      var top;

      camera.parent.updateMatrixWorld();

      // Calculate mouse position based on the canvas element
      if (evt.type === 'touchmove' || evt.type === 'touchstart') {
        // Track the first touch for simplicity.
        point = evt.touches.item(0);
      } else {
        point = evt;
      }

      left = point.clientX - bounds.left;
      top = point.clientY - bounds.top;
      mouse.x = (left / bounds.width) * 2 - 1;
      mouse.y = -(top / bounds.height) * 2 + 1;

      origin.setFromMatrixPosition(camera.matrixWorld);
      direction.set(mouse.x, mouse.y, 0.5).unproject(camera).sub(origin).normalize();
      this.el.setAttribute('raycaster', rayCasterConfig);
      if (evt.type === 'touchmove') { evt.preventDefault(); }
    };
  })(),

  /**
   * Trigger mousedown and keep track of the mousedowned entity.
   */
  onCursorDown: function (evt) {
    this.isCursorDown = true;
    // Raycast again for touch.
    if (this.data.rayOrigin === 'mouse' && evt.type === 'touchstart') {
      this.onMouseMove(evt);
      this.el.components.raycaster.checkIntersections();
      evt.preventDefault();
    }

    this.twoWayEmit(EVENTS.MOUSEDOWN);
    this.cursorDownEl = this.intersectedEl;
  },

  /**
   * Trigger mouseup if:
   * - Not fusing (mobile has no mouse).
   * - Currently intersecting an entity.
   * - Currently-intersected entity is the same as the one when mousedown was triggered,
   *   in case user mousedowned one entity, dragged to another, and mouseupped.
   */
  onCursorUp: function (evt) {
    if (!this.isCursorDown) { return; }

    this.isCursorDown = false;

    var data = this.data;
    this.twoWayEmit(EVENTS.MOUSEUP);

    // If intersected entity has changed since the cursorDown, still emit mouseUp on the
    // previously cursorUp entity.
    if (this.cursorDownEl && this.cursorDownEl !== this.intersectedEl) {
      this.intersectedEventDetail.intersection = null;
      this.cursorDownEl.emit(EVENTS.MOUSEUP, this.intersectedEventDetail);
    }

    if ((!data.fuse || data.rayOrigin === 'mouse') &&
        this.intersectedEl && this.cursorDownEl === this.intersectedEl) {
      this.twoWayEmit(EVENTS.CLICK);
    }

    this.cursorDownEl = null;
    if (evt.type === 'touchend') { evt.preventDefault(); }
  },

  /**
   * Handle intersection.
   */
  onIntersection: function (evt) {
    var currentIntersection;
    var cursorEl = this.el;
    var index;
    var intersectedEl;
    var intersection;

    // Select closest object, excluding the cursor.
    index = evt.detail.els[0] === cursorEl ? 1 : 0;
    intersection = evt.detail.intersections[index];
    intersectedEl = evt.detail.els[index];

    // If cursor is the only intersected object, ignore the event.
    if (!intersectedEl) { return; }

    // Already intersecting this entity.
    if (this.intersectedEl === intersectedEl) { return; }

    // Ignore events further away than active intersection.
    if (this.intersectedEl) {
      currentIntersection = this.el.components.raycaster.getIntersection(this.intersectedEl);
      if (currentIntersection && currentIntersection.distance <= intersection.distance) { return; }
    }

    // Unset current intersection.
    this.clearCurrentIntersection(true);

    this.setIntersection(intersectedEl, intersection);
  },

  /**
   * Handle intersection cleared.
   */
  onIntersectionCleared: function (evt) {
    var clearedEls = evt.detail.clearedEls;
    // Check if the current intersection has ended
    if (clearedEls.indexOf(this.intersectedEl) === -1) { return; }
    this.clearCurrentIntersection();
  },

  onEnterVR: function () {
    this.clearCurrentIntersection(true);
    var xrSession = this.el.sceneEl.xrSession;
    var self = this;
    if (!xrSession) { return; }
    if (this.data.rayOrigin === 'mouse') { return; }
    WEBXR_EVENTS.DOWN.forEach(function (downEvent) {
      xrSession.addEventListener(downEvent, self.onCursorDown);
    });
    WEBXR_EVENTS.UP.forEach(function (upEvent) {
      xrSession.addEventListener(upEvent, self.onCursorUp);
    });
  },

  setIntersection: function (intersectedEl, intersection) {
    var cursorEl = this.el;
    var data = this.data;
    var self = this;

    // Already intersecting.
    if (this.intersectedEl === intersectedEl) { return; }

    // Set new intersection.
    this.intersectedEl = intersectedEl;

    // Hovering.
    cursorEl.addState(STATES.HOVERING);
    intersectedEl.addState(STATES.HOVERED);
    this.twoWayEmit(EVENTS.MOUSEENTER);

    if (this.data.mouseCursorStylesEnabled && this.data.rayOrigin === 'mouse') {
      this.el.sceneEl.canvas.classList.add(CANVAS_HOVER_CLASS);
    }

    // Begin fuse if necessary.
    if (data.fuseTimeout === 0 || !data.fuse) { return; }
    cursorEl.addState(STATES.FUSING);
    this.twoWayEmit(EVENTS.FUSING);
    this.fuseTimeout = setTimeout(function fuse () {
      cursorEl.removeState(STATES.FUSING);
      self.twoWayEmit(EVENTS.CLICK);
    }, data.fuseTimeout);
  },

  clearCurrentIntersection: function (ignoreRemaining) {
    var index;
    var intersection;
    var intersections;
    var cursorEl = this.el;

    // Nothing to be cleared.
    if (!this.intersectedEl) { return; }

    // No longer hovering (or fusing).
    this.intersectedEl.removeState(STATES.HOVERED);
    cursorEl.removeState(STATES.HOVERING);
    cursorEl.removeState(STATES.FUSING);
    this.twoWayEmit(EVENTS.MOUSELEAVE);

    if (this.data.mouseCursorStylesEnabled && this.data.rayOrigin === 'mouse') {
      this.el.sceneEl.canvas.classList.remove(CANVAS_HOVER_CLASS);
    }

    // Unset intersected entity (after emitting the event).
    this.intersectedEl = null;

    // Clear fuseTimeout.
    clearTimeout(this.fuseTimeout);

    // Set intersection to another raycasted element if any.
    if (ignoreRemaining === true) { return; }
    intersections = this.el.components.raycaster.intersections;
    if (intersections.length === 0) { return; }
    // Exclude the cursor.
    index = intersections[0].object.el === cursorEl ? 1 : 0;
    intersection = intersections[index];
    if (!intersection) { return; }
    this.setIntersection(intersection.object.el, intersection);
  },

  /**
   * Helper to emit on both the cursor and the intersected entity (if exists).
   */
  twoWayEmit: function (evtName) {
    var el = this.el;
    var intersectedEl = this.intersectedEl;
    var intersection;

    intersection = this.el.components.raycaster.getIntersection(intersectedEl);
    this.eventDetail.intersectedEl = intersectedEl;
    this.eventDetail.intersection = intersection;
    el.emit(evtName, this.eventDetail);

    if (!intersectedEl) { return; }

    this.intersectedEventDetail.intersection = intersection;
    intersectedEl.emit(evtName, this.intersectedEventDetail);
  }
});

},{"../core/component":113,"../utils/":187}],59:[function(_dereq_,module,exports){
var registerComponent = _dereq_('../core/component').registerComponent;
var bind = _dereq_('../utils/bind');

var trackedControlsUtils = _dereq_('../utils/tracked-controls');
var checkControllerPresentAndSetup = trackedControlsUtils.checkControllerPresentAndSetup;
var emitIfAxesChanged = trackedControlsUtils.emitIfAxesChanged;
var onButtonEvent = trackedControlsUtils.onButtonEvent;

var DAYDREAM_CONTROLLER_MODEL_BASE_URL = 'https://cdn.aframe.io/controllers/google/';
var DAYDREAM_CONTROLLER_MODEL_OBJ_URL = DAYDREAM_CONTROLLER_MODEL_BASE_URL + 'vr_controller_daydream.obj';
var DAYDREAM_CONTROLLER_MODEL_OBJ_MTL = DAYDREAM_CONTROLLER_MODEL_BASE_URL + 'vr_controller_daydream.mtl';

var isWebXRAvailable = _dereq_('../utils/').device.isWebXRAvailable;

var GAMEPAD_ID_WEBXR = 'google-daydream';
var GAMEPAD_ID_WEBVR = 'Daydream Controller';

var GAMEPAD_ID_PREFIX = isWebXRAvailable ? GAMEPAD_ID_WEBXR : GAMEPAD_ID_WEBVR;

/**
 * Button indices:
 * 0 - trackpad
 * 1 - menu (never dispatched on this layer)
 * 2 - system (never dispatched on this layer)
 *
 * Axis:
 * 0 - trackpad x
 * 1 - trackpad y
 */
var INPUT_MAPPING_WEBVR = {
  axes: {trackpad: [0, 1]},
  buttons: ['trackpad', 'menu', 'system']
};

/**
 * Button indices:
 * 0 - none
 * 1 - none
 * 2 - touchpad
 *
 * Axis:
 * 0 - touchpad x
 * 1 - touchpad y
 * Reference: https://github.com/immersive-web/webxr-input-profiles/blob/master/packages/registry/profiles/google/google-daydream.json
 */
var INPUT_MAPPING_WEBXR = {
  axes: {touchpad: [0, 1]},
  buttons: ['none', 'none', 'touchpad', 'menu', 'system']
};

var INPUT_MAPPING = isWebXRAvailable ? INPUT_MAPPING_WEBXR : INPUT_MAPPING_WEBVR;

/**
 * Daydream controls.
 * Interface with Daydream controller and map Gamepad events to
 * controller buttons: trackpad, menu, system
 * Load a controller model and highlight the pressed buttons.
 */
module.exports.Component = registerComponent('daydream-controls', {
  schema: {
    hand: {default: ''},  // This informs the degenerate arm model.
    buttonColor: {type: 'color', default: '#000000'},
    buttonTouchedColor: {type: 'color', default: '#777777'},
    buttonHighlightColor: {type: 'color', default: '#FFFFFF'},
    model: {default: true},
    orientationOffset: {type: 'vec3'},
    armModel: {default: true}
  },

  mapping: INPUT_MAPPING,

  bindMethods: function () {
    this.onModelLoaded = bind(this.onModelLoaded, this);
    this.onControllersUpdate = bind(this.onControllersUpdate, this);
    this.checkIfControllerPresent = bind(this.checkIfControllerPresent, this);
    this.removeControllersUpdateListener = bind(this.removeControllersUpdateListener, this);
    this.onAxisMoved = bind(this.onAxisMoved, this);
  },

  init: function () {
    var self = this;
    this.onButtonChanged = bind(this.onButtonChanged, this);
    this.onButtonDown = function (evt) { onButtonEvent(evt.detail.id, 'down', self); };
    this.onButtonUp = function (evt) { onButtonEvent(evt.detail.id, 'up', self); };
    this.onButtonTouchStart = function (evt) { onButtonEvent(evt.detail.id, 'touchstart', self); };
    this.onButtonTouchEnd = function (evt) { onButtonEvent(evt.detail.id, 'touchend', self); };
    this.controllerPresent = false;
    this.lastControllerCheck = 0;
    this.bindMethods();
  },

  addEventListeners: function () {
    var el = this.el;
    el.addEventListener('buttonchanged', this.onButtonChanged);
    el.addEventListener('buttondown', this.onButtonDown);
    el.addEventListener('buttonup', this.onButtonUp);
    el.addEventListener('touchstart', this.onButtonTouchStart);
    el.addEventListener('touchend', this.onButtonTouchEnd);
    el.addEventListener('model-loaded', this.onModelLoaded);
    el.addEventListener('axismove', this.onAxisMoved);
    this.controllerEventsActive = true;
  },

  removeEventListeners: function () {
    var el = this.el;
    el.removeEventListener('buttonchanged', this.onButtonChanged);
    el.removeEventListener('buttondown', this.onButtonDown);
    el.removeEventListener('buttonup', this.onButtonUp);
    el.removeEventListener('touchstart', this.onButtonTouchStart);
    el.removeEventListener('touchend', this.onButtonTouchEnd);
    el.removeEventListener('model-loaded', this.onModelLoaded);
    el.removeEventListener('axismove', this.onAxisMoved);
    this.controllerEventsActive = false;
  },

  checkIfControllerPresent: function () {
    checkControllerPresentAndSetup(this, GAMEPAD_ID_PREFIX,
      this.data.hand ? {hand: this.data.hand} : {});
  },

  play: function () {
    this.checkIfControllerPresent();
    this.addControllersUpdateListener();
  },

  pause: function () {
    this.removeEventListeners();
    this.removeControllersUpdateListener();
  },

  injectTrackedControls: function () {
    var el = this.el;
    var data = this.data;
    el.setAttribute('tracked-controls', {
      armModel: data.armModel,
      hand: data.hand,
      idPrefix: GAMEPAD_ID_PREFIX,
      id: GAMEPAD_ID_PREFIX,
      orientationOffset: data.orientationOffset
    });
    if (!this.data.model) { return; }
    this.el.setAttribute('obj-model', {
      obj: DAYDREAM_CONTROLLER_MODEL_OBJ_URL,
      mtl: DAYDREAM_CONTROLLER_MODEL_OBJ_MTL
    });
  },

  addControllersUpdateListener: function () {
    this.el.sceneEl.addEventListener('controllersupdated', this.onControllersUpdate, false);
  },

  removeControllersUpdateListener: function () {
    this.el.sceneEl.removeEventListener('controllersupdated', this.onControllersUpdate, false);
  },

  onControllersUpdate: function () {
    this.checkIfControllerPresent();
  },

  onModelLoaded: function (evt) {
    var controllerObject3D = evt.detail.model;
    var buttonMeshes;
    if (!this.data.model) { return; }
    buttonMeshes = this.buttonMeshes = {};
    buttonMeshes.menu = controllerObject3D.getObjectByName('AppButton_AppButton_Cylinder.004');
    buttonMeshes.system = controllerObject3D.getObjectByName('HomeButton_HomeButton_Cylinder.005');
    buttonMeshes.trackpad = controllerObject3D.getObjectByName('TouchPad_TouchPad_Cylinder.003');
    buttonMeshes.touchpad = controllerObject3D.getObjectByName('TouchPad_TouchPad_Cylinder.003');
    // Offset pivot point.
    controllerObject3D.position.set(0, 0, -0.04);
  },

  onAxisMoved: function (evt) {
    emitIfAxesChanged(this, this.mapping.axes, evt);
  },

  onButtonChanged: function (evt) {
    var button = this.mapping.buttons[evt.detail.id];
    if (!button) return;
    // Pass along changed event with button state, using button mapping for convenience.
    this.el.emit(button + 'changed', evt.detail.state);
  },

  updateModel: function (buttonName, evtName) {
    if (!this.data.model) { return; }
    this.updateButtonModel(buttonName, evtName);
  },

  updateButtonModel: function (buttonName, state) {
    var buttonMeshes = this.buttonMeshes;
    if (!buttonMeshes || !buttonMeshes[buttonName]) { return; }
    var color;
    switch (state) {
      case 'down':
        color = this.data.buttonHighlightColor;
        break;
      case 'touchstart':
        color = this.data.buttonTouchedColor;
        break;
      default:
        color = this.data.buttonColor;
    }
    buttonMeshes[buttonName].material.color.set(color);
  }
});

},{"../core/component":113,"../utils/":187,"../utils/bind":181,"../utils/tracked-controls":196}],60:[function(_dereq_,module,exports){
var registerComponent = _dereq_('../core/component').registerComponent;
var bind = _dereq_('../utils/bind');

var trackedControlsUtils = _dereq_('../utils/tracked-controls');
var checkControllerPresentAndSetup = trackedControlsUtils.checkControllerPresentAndSetup;
var emitIfAxesChanged = trackedControlsUtils.emitIfAxesChanged;
var onButtonEvent = trackedControlsUtils.onButtonEvent;
var isWebXRAvailable = _dereq_('../utils/').device.isWebXRAvailable;

var GEARVR_CONTROLLER_MODEL_BASE_URL = 'https://cdn.aframe.io/controllers/samsung/';
var GEARVR_CONTROLLER_MODEL_OBJ_URL = GEARVR_CONTROLLER_MODEL_BASE_URL + 'gear_vr_controller.obj';
var GEARVR_CONTROLLER_MODEL_OBJ_MTL = GEARVR_CONTROLLER_MODEL_BASE_URL + 'gear_vr_controller.mtl';

var GAMEPAD_ID_WEBXR = 'samsung-gearvr';
var GAMEPAD_ID_WEBVR = 'Gear VR';

// Prefix for Gen1 and Gen2 Oculus Touch Controllers.
var GAMEPAD_ID_PREFIX = isWebXRAvailable ? GAMEPAD_ID_WEBXR : GAMEPAD_ID_WEBVR;

/**
 * Button indices:
 * 0 - trackpad
 * 1 - trigger
 *
 * Axis:
 * 0 - trackpad x
 * 1 - trackpad y
 */
var INPUT_MAPPING_WEBVR = {
  axes: {trackpad: [0, 1]},
  buttons: ['trackpad', 'trigger']
};

/**
 * Button indices:
 * 0 - trigger
 * 1 - none
 * 2 - touchpad
 * 3 - menu
 *
 * Axis:
 * 0 - touchpad x
 * 1 - touchpad y
 * Reference: https://github.com/immersive-web/webxr-input-profiles/blob/master/packages/registry/profiles/samsung/samsung-gearvr.json
 */
var INPUT_MAPPING_WEBXR = {
  axes: {touchpad: [0, 1]},
  buttons: ['trigger', 'none', 'touchpad', 'none', 'menu']
};

var INPUT_MAPPING = isWebXRAvailable ? INPUT_MAPPING_WEBXR : INPUT_MAPPING_WEBVR;

/**
 * Gear VR controls.
 * Interface with Gear VR controller and map Gamepad events to
 * controller buttons: trackpad, trigger
 * Load a controller model and highlight the pressed buttons.
 */
module.exports.Component = registerComponent('gearvr-controls', {
  schema: {
    hand: {default: ''},  // This informs the degenerate arm model.
    buttonColor: {type: 'color', default: '#000000'},
    buttonTouchedColor: {type: 'color', default: '#777777'},
    buttonHighlightColor: {type: 'color', default: '#FFFFFF'},
    model: {default: true},
    orientationOffset: {type: 'vec3'},
    armModel: {default: true}
  },

  mapping: INPUT_MAPPING,

  bindMethods: function () {
    this.onModelLoaded = bind(this.onModelLoaded, this);
    this.onControllersUpdate = bind(this.onControllersUpdate, this);
    this.checkIfControllerPresent = bind(this.checkIfControllerPresent, this);
    this.removeControllersUpdateListener = bind(this.removeControllersUpdateListener, this);
    this.onAxisMoved = bind(this.onAxisMoved, this);
  },

  init: function () {
    var self = this;
    this.onButtonChanged = bind(this.onButtonChanged, this);
    this.onButtonDown = function (evt) { onButtonEvent(evt.detail.id, 'down', self); };
    this.onButtonUp = function (evt) { onButtonEvent(evt.detail.id, 'up', self); };
    this.onButtonTouchStart = function (evt) { onButtonEvent(evt.detail.id, 'touchstart', self); };
    this.onButtonTouchEnd = function (evt) { onButtonEvent(evt.detail.id, 'touchend', self); };
    this.controllerPresent = false;
    this.lastControllerCheck = 0;
    this.bindMethods();
  },

  addEventListeners: function () {
    var el = this.el;
    el.addEventListener('buttonchanged', this.onButtonChanged);
    el.addEventListener('buttondown', this.onButtonDown);
    el.addEventListener('buttonup', this.onButtonUp);
    el.addEventListener('touchstart', this.onButtonTouchStart);
    el.addEventListener('touchend', this.onButtonTouchEnd);
    el.addEventListener('model-loaded', this.onModelLoaded);
    el.addEventListener('axismove', this.onAxisMoved);
    this.controllerEventsActive = true;
  },

  removeEventListeners: function () {
    var el = this.el;
    el.removeEventListener('buttonchanged', this.onButtonChanged);
    el.removeEventListener('buttondown', this.onButtonDown);
    el.removeEventListener('buttonup', this.onButtonUp);
    el.removeEventListener('touchstart', this.onButtonTouchStart);
    el.removeEventListener('touchend', this.onButtonTouchEnd);
    el.removeEventListener('model-loaded', this.onModelLoaded);
    el.removeEventListener('axismove', this.onAxisMoved);
    this.controllerEventsActive = false;
  },

  checkIfControllerPresent: function () {
    checkControllerPresentAndSetup(this, GAMEPAD_ID_PREFIX,
      this.data.hand ? {hand: this.data.hand} : {});
  },

  play: function () {
    this.checkIfControllerPresent();
    this.addControllersUpdateListener();
  },

  pause: function () {
    this.removeEventListeners();
    this.removeControllersUpdateListener();
  },

  injectTrackedControls: function () {
    var el = this.el;
    var data = this.data;
    el.setAttribute('tracked-controls', {
      armModel: data.armModel,
      hand: data.hand,
      idPrefix: GAMEPAD_ID_PREFIX,
      id: GAMEPAD_ID_PREFIX,
      orientationOffset: data.orientationOffset
    });
    if (!this.data.model) { return; }
    this.el.setAttribute('obj-model', {
      obj: GEARVR_CONTROLLER_MODEL_OBJ_URL,
      mtl: GEARVR_CONTROLLER_MODEL_OBJ_MTL
    });
  },

  addControllersUpdateListener: function () {
    this.el.sceneEl.addEventListener('controllersupdated', this.onControllersUpdate, false);
  },

  removeControllersUpdateListener: function () {
    this.el.sceneEl.removeEventListener('controllersupdated', this.onControllersUpdate, false);
  },

  onControllersUpdate: function () {
    this.checkIfControllerPresent();
  },

  // No need for onButtonChanged, since Gear VR controller has no analog buttons.

  onModelLoaded: function (evt) {
    var controllerObject3D = evt.detail.model;
    var buttonMeshes;
    if (!this.data.model) { return; }
    buttonMeshes = this.buttonMeshes = {};
    buttonMeshes.trigger = controllerObject3D.children[2];
    buttonMeshes.trackpad = controllerObject3D.children[1];
    buttonMeshes.touchpad = controllerObject3D.children[1];
  },

  onButtonChanged: function (evt) {
    var button = this.mapping.buttons[evt.detail.id];
    if (!button) return;
    // Pass along changed event with button state, using button mapping for convenience.
    this.el.emit(button + 'changed', evt.detail.state);
  },

  onAxisMoved: function (evt) {
    emitIfAxesChanged(this, this.mapping.axes, evt);
  },

  updateModel: function (buttonName, evtName) {
    if (!this.data.model) { return; }
    this.updateButtonModel(buttonName, evtName);
  },

  updateButtonModel: function (buttonName, state) {
    var buttonMeshes = this.buttonMeshes;
    if (!buttonMeshes || !buttonMeshes[buttonName]) { return; }
    var color;
    switch (state) {
      case 'down':
        color = this.data.buttonHighlightColor;
        break;
      case 'touchstart':
        color = this.data.buttonTouchedColor;
        break;
      default:
        color = this.data.buttonColor;
    }
    buttonMeshes[buttonName].material.color.set(color);
  }
});

},{"../core/component":113,"../utils/":187,"../utils/bind":181,"../utils/tracked-controls":196}],61:[function(_dereq_,module,exports){
var registerComponent = _dereq_('../core/component').registerComponent;
var bind = _dereq_('../utils/bind');

var trackedControlsUtils = _dereq_('../utils/tracked-controls');
var checkControllerPresentAndSetup = trackedControlsUtils.checkControllerPresentAndSetup;
var emitIfAxesChanged = trackedControlsUtils.emitIfAxesChanged;
var onButtonEvent = trackedControlsUtils.onButtonEvent;

var GAMEPAD_ID_PREFIX = 'generic';

/**
 * Button indices:
 * 0 - trigger
 * 1 - squeeze
 * 2 - touchpad
 * 3 - thumbstick
 *
 * Axis:
 * 0 - touchpad
 * 1 - thumbstick
 *
 */
var INPUT_MAPPING = {
  axes: {
    touchpad: [0, 1],
    thumbstick: [2, 3]
  },
  buttons: ['trigger', 'squeeze', 'touchpad', 'thumbstick']
};

/**
 * Oculus Go controls.
 * Interface with Oculus Go controller and map Gamepad events to
 * controller buttons: trackpad, trigger
 * Load a controller model and highlight the pressed buttons.
 */
module.exports.Component = registerComponent('generic-tracked-controller-controls', {
  schema: {
    hand: {default: ''},  // This informs the degenerate arm model.
    defaultModel: {default: true},
    defaultModelColor: {default: 'gray'},
    orientationOffset: {type: 'vec3'},
    disabled: {default: false}
  },

  /**
   * Button IDs:
   * 0 - trackpad
   * 1 - trigger
   */
  mapping: INPUT_MAPPING,

  bindMethods: function () {
    this.onControllersUpdate = bind(this.onControllersUpdate, this);
    this.checkIfControllerPresent = bind(this.checkIfControllerPresent, this);
    this.removeControllersUpdateListener = bind(this.removeControllersUpdateListener, this);
    this.onAxisMoved = bind(this.onAxisMoved, this);
  },

  init: function () {
    var self = this;
    this.onButtonChanged = bind(this.onButtonChanged, this);
    this.onButtonDown = function (evt) { onButtonEvent(evt.detail.id, 'down', self); };
    this.onButtonUp = function (evt) { onButtonEvent(evt.detail.id, 'up', self); };
    this.onButtonTouchStart = function (evt) { onButtonEvent(evt.detail.id, 'touchstart', self); };
    this.onButtonTouchEnd = function (evt) { onButtonEvent(evt.detail.id, 'touchend', self); };
    this.controllerPresent = false;
    this.wasControllerConnected = false;
    this.lastControllerCheck = 0;
    this.rendererSystem = this.el.sceneEl.systems.renderer;
    this.bindMethods();

    // generic-tracked-controller-controls has the lowest precedence.
    // We must diable this component if there are more specialized controls components.
    this.el.addEventListener('controllerconnected', function (evt) {
      if (evt.detail.name === self.name) { return; }
      self.wasControllerConnected = true;
      self.removeEventListeners();
      self.removeControllersUpdateListener();
    });
  },

  addEventListeners: function () {
    var el = this.el;
    el.addEventListener('buttonchanged', this.onButtonChanged);
    el.addEventListener('buttondown', this.onButtonDown);
    el.addEventListener('buttonup', this.onButtonUp);
    el.addEventListener('touchstart', this.onButtonTouchStart);
    el.addEventListener('touchend', this.onButtonTouchEnd);
    el.addEventListener('axismove', this.onAxisMoved);
    this.controllerEventsActive = true;
  },

  removeEventListeners: function () {
    var el = this.el;
    el.removeEventListener('buttonchanged', this.onButtonChanged);
    el.removeEventListener('buttondown', this.onButtonDown);
    el.removeEventListener('buttonup', this.onButtonUp);
    el.removeEventListener('touchstart', this.onButtonTouchStart);
    el.removeEventListener('touchend', this.onButtonTouchEnd);
    el.removeEventListener('axismove', this.onAxisMoved);
    this.controllerEventsActive = false;
  },

  checkIfControllerPresent: function () {
    var data = this.data;
    var hand = data.hand ? data.hand : undefined;
    checkControllerPresentAndSetup(
      this, GAMEPAD_ID_PREFIX,
      {hand: hand, iterateControllerProfiles: true});
  },

  play: function () {
    if (this.wasControllerConnected) { return; }
    this.checkIfControllerPresent();
    this.addControllersUpdateListener();
  },

  pause: function () {
    this.removeEventListeners();
    this.removeControllersUpdateListener();
  },

  injectTrackedControls: function () {
    var el = this.el;
    var data = this.data;

    // Do nothing if tracked-controls already set.
    // Generic controls have the lowest precedence.
    if (this.el.components['tracked-controls']) {
      this.removeEventListeners();
      return;
    }
    el.setAttribute('tracked-controls', {
      hand: data.hand,
      idPrefix: GAMEPAD_ID_PREFIX,
      orientationOffset: data.orientationOffset,
      iterateControllerProfiles: true
    });
    if (!this.data.defaultModel) { return; }
    this.initDefaultModel();
  },

  addControllersUpdateListener: function () {
    this.el.sceneEl.addEventListener('controllersupdated', this.onControllersUpdate, false);
  },

  removeControllersUpdateListener: function () {
    this.el.sceneEl.removeEventListener('controllersupdated', this.onControllersUpdate, false);
  },

  onControllersUpdate: function () {
    this.checkIfControllerPresent();
  },

  onButtonChanged: function (evt) {
    var button = this.mapping.buttons[evt.detail.id];
    if (!button) return;
    // Pass along changed event with button state, using button mapping for convenience.
    this.el.emit(button + 'changed', evt.detail.state);
  },

  onAxisMoved: function (evt) {
    emitIfAxesChanged(this, this.mapping.axes, evt);
  },

  initDefaultModel: function () {
    var modelEl = this.modelEl = document.createElement('a-entity');
    modelEl.setAttribute('geometry', {
      primitive: 'sphere',
      radius: 0.03
    });
    modelEl.setAttribute('material', {color: this.data.color});
    this.el.appendChild(modelEl);
  }
});

},{"../core/component":113,"../utils/bind":181,"../utils/tracked-controls":196}],62:[function(_dereq_,module,exports){
var geometries = _dereq_('../core/geometry').geometries;
var geometryNames = _dereq_('../core/geometry').geometryNames;
var registerComponent = _dereq_('../core/component').registerComponent;
var THREE = _dereq_('../lib/three');

var dummyGeometry = new THREE.BufferGeometry();

/**
 * Geometry component. Combined with material component to make a mesh in 3D object.
 * Extended with registered geometries.
 */
module.exports.Component = registerComponent('geometry', {
  schema: {
    buffer: {default: true},
    primitive: {default: 'box', oneOf: geometryNames, schemaChange: true},
    skipCache: {default: false}
  },

  init: function () {
    this.geometry = null;
  },

  /**
   * Talk to geometry system to get or create geometry.
   */
  update: function (previousData) {
    var data = this.data;
    var el = this.el;
    var mesh;
    var system = this.system;

    // Dispose old geometry if we created one.
    if (this.geometry) {
      system.unuseGeometry(previousData);
      this.geometry = null;
    }

    // Create new geometry.
    this.geometry = system.getOrCreateGeometry(data);

    // Set on mesh. If mesh does not exist, create it.
    mesh = el.getObject3D('mesh');
    if (mesh) {
      mesh.geometry = this.geometry;
    } else {
      mesh = new THREE.Mesh();
      mesh.geometry = this.geometry;
      // Default material if not defined on the entity.
      if (!this.el.getAttribute('material')) {
        mesh.material = new THREE.MeshStandardMaterial({
          color: Math.random() * 0xFFFFFF,
          metalness: 0,
          roughness: 0.5
        });
      }
      el.setObject3D('mesh', mesh);
    }
  },

  /**
   * Tell geometry system that entity is no longer using the geometry.
   * Unset the geometry on the mesh
   */
  remove: function () {
    this.system.unuseGeometry(this.data);
    this.el.getObject3D('mesh').geometry = dummyGeometry;
    this.geometry = null;
  },

  /**
   * Update geometry component schema based on geometry type.
   */
  updateSchema: function (data) {
    var currentGeometryType = this.oldData && this.oldData.primitive;
    var newGeometryType = data.primitive;
    var schema = geometries[newGeometryType] && geometries[newGeometryType].schema;

    // Geometry has no schema.
    if (!schema) { throw new Error('Unknown geometry schema `' + newGeometryType + '`'); }
    // Nothing has changed.
    if (currentGeometryType && currentGeometryType === newGeometryType) { return; }

    this.extendSchema(schema);
  }
});

},{"../core/component":113,"../core/geometry":114,"../lib/three":161}],63:[function(_dereq_,module,exports){
var registerComponent = _dereq_('../core/component').registerComponent;
var THREE = _dereq_('../lib/three');
var utils = _dereq_('../utils/');
var warn = utils.debug('components:gltf-model:warn');

/**
 * glTF model loader.
 */
module.exports.Component = registerComponent('gltf-model', {
  schema: {type: 'model'},

  init: function () {
    var dracoLoader = this.system.getDRACOLoader();
    this.model = null;
    this.loader = new THREE.GLTFLoader();
    if (dracoLoader) {
      this.loader.setDRACOLoader(dracoLoader);
    }
  },

  update: function () {
    var self = this;
    var el = this.el;
    var src = this.data;

    if (!src) { return; }

    this.remove();

    this.loader.load(src, function gltfLoaded (gltfModel) {
      self.model = gltfModel.scene || gltfModel.scenes[0];
      self.model.animations = gltfModel.animations;
      el.setObject3D('mesh', self.model);
      el.emit('model-loaded', {format: 'gltf', model: self.model});
    }, undefined /* onProgress */, function gltfFailed (error) {
      var message = (error && error.message) ? error.message : 'Failed to load glTF model';
      warn(message);
      el.emit('model-error', {format: 'gltf', src: src});
    });
  },

  remove: function () {
    if (!this.model) { return; }
    this.el.removeObject3D('mesh');
  }
});

},{"../core/component":113,"../lib/three":161,"../utils/":187}],64:[function(_dereq_,module,exports){
/* global THREE */
var registerComponent = _dereq_('../core/component').registerComponent;

// Found at https://github.com/aframevr/assets.
var MODEL_URLS = {
  toonLeft: 'https://cdn.aframe.io/controllers/hands/leftHand.glb',
  toonRight: 'https://cdn.aframe.io/controllers/hands/rightHand.glb',
  lowPolyLeft: 'https://cdn.aframe.io/controllers/hands/leftHandLow.glb',
  lowPolyRight: 'https://cdn.aframe.io/controllers/hands/rightHandLow.glb',
  highPolyLeft: 'https://cdn.aframe.io/controllers/hands/leftHandHigh.glb',
  highPolyRight: 'https://cdn.aframe.io/controllers/hands/rightHandHigh.glb'
};

// Poses.
var ANIMATIONS = {
  open: 'Open',
  // point: grip active, trackpad surface active, trigger inactive.
  point: 'Point',
  // pointThumb: grip active, trigger inactive, trackpad surface inactive.
  pointThumb: 'Point + Thumb',
  // fist: grip active, trigger active, trackpad surface active.
  fist: 'Fist',
  // hold: trigger active, grip inactive.
  hold: 'Hold',
  // thumbUp: grip active, trigger active, trackpad surface inactive.
  thumbUp: 'Thumb Up'
};

// Map animation to public events for the API.
var EVENTS = {};
EVENTS[ANIMATIONS.fist] = 'grip';
EVENTS[ANIMATIONS.thumbUp] = 'pistol';
EVENTS[ANIMATIONS.point] = 'pointing';

/**
 * Hand controls component that abstracts 6DoF controls:
 *   oculus-touch-controls, vive-controls, windows-motion-controls.
 *
 * Originally meant to be a sample implementation of applications-specific controls that
 * abstracts multiple types of controllers.
 *
 * Auto-detect appropriate controller.
 * Handle common events coming from the detected vendor-specific controls.
 * Translate button events to semantic hand-related event names:
 *   (gripclose, gripopen, thumbup, thumbdown, pointup, pointdown)
 * Load hand model with gestures that are applied based on the button pressed.
 *
 * @property {string} Hand mapping (`left`, `right`).
 */
module.exports.Component = registerComponent('hand-controls', {
  schema: {
    color: {default: 'white', type: 'color'},
    hand: { default: 'left' },
    handModelStyle: {default: 'lowPoly', oneOf: ['lowPoly', 'highPoly', 'toon']}
  },

  init: function () {
    var self = this;
    var el = this.el;
    // Current pose.
    this.gesture = ANIMATIONS.open;
    // Active buttons populated by events provided by the attached controls.
    this.pressedButtons = {};
    this.touchedButtons = {};
    this.loader = new THREE.GLTFLoader();
    this.loader.setCrossOrigin('anonymous');

    this.onGripDown = function () { self.handleButton('grip', 'down'); };
    this.onGripUp = function () { self.handleButton('grip', 'up'); };
    this.onTrackpadDown = function () { self.handleButton('trackpad', 'down'); };
    this.onTrackpadUp = function () { self.handleButton('trackpad', 'up'); };
    this.onTrackpadTouchStart = function () { self.handleButton('trackpad', 'touchstart'); };
    this.onTrackpadTouchEnd = function () { self.handleButton('trackpad', 'touchend'); };
    this.onTriggerDown = function () { self.handleButton('trigger', 'down'); };
    this.onTriggerUp = function () { self.handleButton('trigger', 'up'); };
    this.onTriggerTouchStart = function () { self.handleButton('trigger', 'touchstart'); };
    this.onTriggerTouchEnd = function () { self.handleButton('trigger', 'touchend'); };
    this.onGripTouchStart = function () { self.handleButton('grip', 'touchstart'); };
    this.onGripTouchEnd = function () { self.handleButton('grip', 'touchend'); };
    this.onThumbstickDown = function () { self.handleButton('thumbstick', 'down'); };
    this.onThumbstickUp = function () { self.handleButton('thumbstick', 'up'); };
    this.onAorXTouchStart = function () { self.handleButton('AorX', 'touchstart'); };
    this.onAorXTouchEnd = function () { self.handleButton('AorX', 'touchend'); };
    this.onBorYTouchStart = function () { self.handleButton('BorY', 'touchstart'); };
    this.onBorYTouchEnd = function () { self.handleButton('BorY', 'touchend'); };
    this.onSurfaceTouchStart = function () { self.handleButton('surface', 'touchstart'); };
    this.onSurfaceTouchEnd = function () { self.handleButton('surface', 'touchend'); };
    this.onControllerConnected = this.onControllerConnected.bind(this);
    this.onControllerDisconnected = this.onControllerDisconnected.bind(this);

    el.addEventListener('controllerconnected', this.onControllerConnected);
    el.addEventListener('controllerdisconnected', this.onControllerDisconnected);

    // Hidden by default.
    el.object3D.visible = false;
  },

  play: function () {
    this.addEventListeners();
  },

  pause: function () {
    this.removeEventListeners();
  },

  tick: function (time, delta) {
    var mesh = this.el.getObject3D('mesh');

    if (!mesh || !mesh.mixer) { return; }

    mesh.mixer.update(delta / 1000);
  },

  onControllerConnected: function () {
    this.el.object3D.visible = true;
  },

  onControllerDisconnected: function () {
    this.el.object3D.visible = false;
  },

  addEventListeners: function () {
    var el = this.el;
    el.addEventListener('gripdown', this.onGripDown);
    el.addEventListener('gripup', this.onGripUp);
    el.addEventListener('trackpaddown', this.onTrackpadDown);
    el.addEventListener('trackpadup', this.onTrackpadUp);
    el.addEventListener('trackpadtouchstart', this.onTrackpadTouchStart);
    el.addEventListener('trackpadtouchend', this.onTrackpadTouchEnd);
    el.addEventListener('triggerdown', this.onTriggerDown);
    el.addEventListener('triggerup', this.onTriggerUp);
    el.addEventListener('triggertouchstart', this.onTriggerTouchStart);
    el.addEventListener('triggertouchend', this.onTriggerTouchEnd);
    el.addEventListener('griptouchstart', this.onGripTouchStart);
    el.addEventListener('griptouchend', this.onGripTouchEnd);
    el.addEventListener('thumbstickdown', this.onThumbstickDown);
    el.addEventListener('thumbstickup', this.onThumbstickUp);
    el.addEventListener('abuttontouchstart', this.onAorXTouchStart);
    el.addEventListener('abuttontouchend', this.onAorXTouchEnd);
    el.addEventListener('bbuttontouchstart', this.onBorYTouchStart);
    el.addEventListener('bbuttontouchend', this.onBorYTouchEnd);
    el.addEventListener('xbuttontouchstart', this.onAorXTouchStart);
    el.addEventListener('xbuttontouchend', this.onAorXTouchEnd);
    el.addEventListener('ybuttontouchstart', this.onBorYTouchStart);
    el.addEventListener('ybuttontouchend', this.onBorYTouchEnd);
    el.addEventListener('surfacetouchstart', this.onSurfaceTouchStart);
    el.addEventListener('surfacetouchend', this.onSurfaceTouchEnd);
  },

  removeEventListeners: function () {
    var el = this.el;
    el.removeEventListener('gripdown', this.onGripDown);
    el.removeEventListener('gripup', this.onGripUp);
    el.removeEventListener('trackpaddown', this.onTrackpadDown);
    el.removeEventListener('trackpadup', this.onTrackpadUp);
    el.removeEventListener('trackpadtouchstart', this.onTrackpadTouchStart);
    el.removeEventListener('trackpadtouchend', this.onTrackpadTouchEnd);
    el.removeEventListener('triggerdown', this.onTriggerDown);
    el.removeEventListener('triggerup', this.onTriggerUp);
    el.removeEventListener('triggertouchstart', this.onTriggerTouchStart);
    el.removeEventListener('triggertouchend', this.onTriggerTouchEnd);
    el.removeEventListener('griptouchstart', this.onGripTouchStart);
    el.removeEventListener('griptouchend', this.onGripTouchEnd);
    el.removeEventListener('thumbstickdown', this.onThumbstickDown);
    el.removeEventListener('thumbstickup', this.onThumbstickUp);
    el.removeEventListener('abuttontouchstart', this.onAorXTouchStart);
    el.removeEventListener('abuttontouchend', this.onAorXTouchEnd);
    el.removeEventListener('bbuttontouchstart', this.onBorYTouchStart);
    el.removeEventListener('bbuttontouchend', this.onBorYTouchEnd);
    el.removeEventListener('xbuttontouchstart', this.onAorXTouchStart);
    el.removeEventListener('xbuttontouchend', this.onAorXTouchEnd);
    el.removeEventListener('ybuttontouchstart', this.onBorYTouchStart);
    el.removeEventListener('ybuttontouchend', this.onBorYTouchEnd);
    el.removeEventListener('surfacetouchstart', this.onSurfaceTouchStart);
    el.removeEventListener('surfacetouchend', this.onSurfaceTouchEnd);
  },

  /**
   * Update handler. More like the `init` handler since the only property is the hand, and
   * that won't be changing much.
   */
  update: function (previousHand) {
    var controlConfiguration;
    var el = this.el;
    var hand = this.data.hand;
    var handModelStyle = this.data.handModelStyle;
    var handColor = this.data.color;
    var self = this;

    // Get common configuration to abstract different vendor controls.
    controlConfiguration = {
      hand: hand,
      model: false
    };

    // Set model.
    if (hand !== previousHand) {
      var handmodelUrl = MODEL_URLS[handModelStyle + hand.charAt(0).toUpperCase() + hand.slice(1)];
      this.loader.load(handmodelUrl, function (gltf) {
        var mesh = gltf.scene.children[0];
        var handModelOrientation = hand === 'left' ? Math.PI / 2 : -Math.PI / 2;
        mesh.mixer = new THREE.AnimationMixer(mesh);
        self.clips = gltf.animations;
        el.setObject3D('mesh', mesh);

        var handMaterial = mesh.children[1].material;
        handMaterial.color = new THREE.Color(handColor);
        mesh.position.set(0, 0, 0);
        mesh.rotation.set(0, 0, handModelOrientation);
        el.setAttribute('magicleap-controls', controlConfiguration);
        el.setAttribute('vive-controls', controlConfiguration);
        el.setAttribute('oculus-touch-controls', controlConfiguration);
        el.setAttribute('windows-motion-controls', controlConfiguration);
      });
    }
  },

  remove: function () {
    this.el.removeObject3D('mesh');
  },

  /**
   * Play model animation, based on which button was pressed and which kind of event.
   *
   * 1. Process buttons.
   * 2. Determine gesture (this.determineGesture()).
   * 3. Animation gesture (this.animationGesture()).
   * 4. Emit gesture events (this.emitGestureEvents()).
   *
   * @param {string} button - Name of the button.
   * @param {string} evt - Type of event for the button (i.e., down/up/touchstart/touchend).
   */
  handleButton: function (button, evt) {
    var lastGesture;
    var isPressed = evt === 'down';
    var isTouched = evt === 'touchstart';

    // Update objects.
    if (evt.indexOf('touch') === 0) {
      // Update touch object.
      if (isTouched === this.touchedButtons[button]) { return; }
      this.touchedButtons[button] = isTouched;
    } else {
      // Update button object.
      if (isPressed === this.pressedButtons[button]) { return; }
      this.pressedButtons[button] = isPressed;
    }

    // Determine the gesture.
    lastGesture = this.gesture;
    this.gesture = this.determineGesture();

    // Same gesture.
    if (this.gesture === lastGesture) { return; }
    // Animate gesture.
    this.animateGesture(this.gesture, lastGesture);

    // Emit events.
    this.emitGestureEvents(this.gesture, lastGesture);
  },

  /**
   * Determine which pose hand should be in considering active and touched buttons.
   */
  determineGesture: function () {
    var gesture;
    var isGripActive = this.pressedButtons.grip;
    var isSurfaceActive = this.pressedButtons.surface || this.touchedButtons.surface;
    var isTrackpadActive = this.pressedButtons.trackpad || this.touchedButtons.trackpad;
    var isTriggerActive = this.pressedButtons.trigger || this.touchedButtons.trigger;
    var isABXYActive = this.touchedButtons.AorX || this.touchedButtons.BorY;
    var isVive = isViveController(this.el.components['tracked-controls']);

    // Works well with Oculus Touch and Windows Motion Controls, but Vive needs tweaks.
    if (isVive) {
      if (isGripActive || isTriggerActive) {
        gesture = ANIMATIONS.fist;
      } else if (isTrackpadActive) {
        gesture = ANIMATIONS.point;
      }
    } else {
      if (isGripActive) {
        if (isSurfaceActive || isABXYActive || isTrackpadActive) {
          gesture = isTriggerActive ? ANIMATIONS.fist : ANIMATIONS.point;
        } else {
          gesture = isTriggerActive ? ANIMATIONS.thumbUp : ANIMATIONS.pointThumb;
        }
      } else if (isTriggerActive) {
        gesture = ANIMATIONS.hold;
      }
    }

    return gesture;
  },

  /**
   * Play corresponding clip to a gesture
   */
  getClip: function (gesture) {
    var clip;
    var i;
    for (i = 0; i < this.clips.length; i++) {
      clip = this.clips[i];
      if (clip.name !== gesture) { continue; }
      return clip;
    }
  },

  /**
   * Play gesture animation.
   *
   * @param {string} gesture - Which pose to animate to. If absent, then animate to open.
   * @param {string} lastGesture - Previous gesture, to reverse back to open if needed.
   */
  animateGesture: function (gesture, lastGesture) {
    if (gesture) {
      this.playAnimation(gesture || ANIMATIONS.open, lastGesture, false);
      return;
    }

    // If no gesture, then reverse the current gesture back to open pose.
    this.playAnimation(lastGesture, lastGesture, true);
  },

  /**
   * Emit `hand-controls`-specific events.
   */
  emitGestureEvents: function (gesture, lastGesture) {
    var el = this.el;
    var eventName;

    if (lastGesture === gesture) { return; }

    // Emit event for lastGesture not inactive.
    eventName = getGestureEventName(lastGesture, false);
    if (eventName) { el.emit(eventName); }

    // Emit event for current gesture now active.
    eventName = getGestureEventName(gesture, true);
    if (eventName) { el.emit(eventName); }
  },

  /**
  * Play hand animation based on button state.
  *
  * @param {string} gesture - Name of the animation as specified by the model.
  * @param {string} lastGesture - Previous pose.
  * @param {boolean} reverse - Whether animation should play in reverse.
  */
  playAnimation: function (gesture, lastGesture, reverse) {
    var clip;
    var fromAction;
    var mesh = this.el.getObject3D('mesh');
    var toAction;

    if (!mesh) { return; }

    // Stop all current animations.
    mesh.mixer.stopAllAction();

    // Grab clip action.
    clip = this.getClip(gesture);
    toAction = mesh.mixer.clipAction(clip);
    toAction.clampWhenFinished = true;
    toAction.loop = THREE.LoopRepeat;
    toAction.repetitions = 0;
    toAction.timeScale = reverse ? -1 : 1;
    toAction.time = reverse ? clip.duration : 0;
    toAction.weight = 1;

    // No gesture to gesture or gesture to no gesture.
    if (!lastGesture || gesture === lastGesture) {
      // Stop all current animations.
      mesh.mixer.stopAllAction();
      // Play animation.
      toAction.play();
      return;
    }

    // Animate or crossfade from gesture to gesture.
    clip = this.getClip(lastGesture);
    fromAction = mesh.mixer.clipAction(clip);
    fromAction.weight = 0.15;
    fromAction.play();
    toAction.play();
    fromAction.crossFadeTo(toAction, 0.15, true);
  }
});

/**
 * Suffix gestures based on toggle state (e.g., open/close, up/down, start/end).
 *
 * @param {string} gesture
 * @param {boolean} active
 */
function getGestureEventName (gesture, active) {
  var eventName;

  if (!gesture) { return; }

  eventName = EVENTS[gesture];
  if (eventName === 'grip') {
    return eventName + (active ? 'close' : 'open');
  }
  if (eventName === 'point') {
    return eventName + (active ? 'up' : 'down');
  }
  if (eventName === 'pointing' || eventName === 'pistol') {
    return eventName + (active ? 'start' : 'end');
  }
}

function isViveController (trackedControls) {
  var controller = trackedControls && trackedControls.controller;
  var isVive = controller && (controller.id && controller.id.indexOf('OpenVR ') === 0 ||
    (controller.profiles &&
     controller.profiles[0] &&
     controller.profiles[0] === 'htc-vive-controller-mv'));
  return isVive;
}

},{"../core/component":113}],65:[function(_dereq_,module,exports){
/* global THREE, XRRigidTransform */
var registerComponent = _dereq_('../core/component').registerComponent;
var bind = _dereq_('../utils/bind');

var trackedControlsUtils = _dereq_('../utils/tracked-controls');
var checkControllerPresentAndSetup = trackedControlsUtils.checkControllerPresentAndSetup;

var LEFT_HAND_MODEL_URL = 'https://cdn.aframe.io/controllers/oculus-hands/unity/left.glb';
var RIGHT_HAND_MODEL_URL = 'https://cdn.aframe.io/controllers/oculus-hands/unity/right.glb';

var BONE_PREFIX = {
  left: 'b_l_',
  right: 'b_r_'
};

var JOINTS = [
  'wrist',
  'thumb-metacarpal',
  'thumb-phalanx-proximal',
  'thumb-phalanx-distal',
  'thumb-tip',
  'index-finger-metacarpal',
  'index-finger-phalanx-proximal',
  'index-finger-phalanx-intermediate',
  'index-finger-phalanx-distal',
  'index-finger-tip',
  'middle-finger-metacarpal',
  'middle-finger-phalanx-proximal',
  'middle-finger-phalanx-intermediate',
  'middle-finger-phalanx-distal',
  'middle-finger-tip',
  'ring-finger-metacarpal',
  'ring-finger-phalanx-proximal',
  'ring-finger-phalanx-intermediate',
  'ring-finger-phalanx-distal',
  'ring-finger-tip',
  'pinky-finger-metacarpal',
  'pinky-finger-phalanx-proximal',
  'pinky-finger-phalanx-intermediate',
  'pinky-finger-phalanx-distal',
  'pinky-finger-tip'
];

var BONE_MAPPING = {
  'wrist': 'wrist',
  'thumb-metacarpal': 'thumb1',
  'thumb-phalanx-proximal': 'thumb2',
  'thumb-phalanx-distal': 'thumb3',
  'thumb-tip': 'thumb_null',
  'index-finger-phalanx-proximal': 'index1',
  'index-finger-phalanx-intermediate': 'index2',
  'index-finger-phalanx-distal': 'index3',
  'index-finger-tip': 'index_null',
  'middle-finger-phalanx-proximal': 'middle1',
  'middle-finger-phalanx-intermediate': 'middle2',
  'middle-finger-phalanx-distal': 'middle3',
  'middle-finger-tip': 'middle_null',
  'ring-finger-phalanx-proximal': 'ring1',
  'ring-finger-phalanx-intermediate': 'ring2',
  'ring-finger-phalanx-distal': 'ring3',
  'ring-finger-tip': 'ring_null',
  'pinky-finger-metacarpal': 'pinky0',
  'pinky-finger-phalanx-proximal': 'pinky1',
  'pinky-finger-phalanx-intermediate': 'pinky2',
  'pinky-finger-phalanx-distal': 'pinky3',
  'pinky-finger-tip': 'pinky_null'
};

var PINCH_START_DISTANCE = 0.015;
var PINCH_END_DISTANCE = 0.03;
var PINCH_POSITION_INTERPOLATION = 0.5;

/**
 * Controls for hand tracking
 */
module.exports.Component = registerComponent('hand-tracking-controls', {
  schema: {
    hand: {default: 'right', oneOf: ['left', 'right']},
    modelStyle: {default: 'mesh', oneOf: ['dots', 'mesh']},
    modelColor: {default: 'white'}
  },

  bindMethods: function () {
    this.onControllersUpdate = bind(this.onControllersUpdate, this);
    this.checkIfControllerPresent = bind(this.checkIfControllerPresent, this);
    this.removeControllersUpdateListener = bind(this.removeControllersUpdateListener, this);
  },

  addEventListeners: function () {
    this.el.addEventListener('model-loaded', this.onModelLoaded);
    for (var i = 0; i < this.jointEls.length; ++i) {
      this.jointEls[i].object3D.visible = true;
    }
  },

  removeEventListeners: function () {
    this.el.removeEventListener('model-loaded', this.onModelLoaded);
    for (var i = 0; i < this.jointEls.length; ++i) {
      this.jointEls[i].object3D.visible = false;
    }
  },

  init: function () {
    var sceneEl = this.el.sceneEl;
    var webXROptionalAttributes = sceneEl.getAttribute('webxr').optionalFeatures;
    webXROptionalAttributes.push('hand-tracking');
    sceneEl.setAttribute('webxr', {optionalFeatures: webXROptionalAttributes});
    this.onModelLoaded = this.onModelLoaded.bind(this);
    this.jointEls = [];
    this.controllerPresent = false;
    this.isPinched = false;
    this.pinchEventDetail = {position: new THREE.Vector3()};
    this.indexTipPosition = new THREE.Vector3();

    this.bindMethods();

    this.updateReferenceSpace = this.updateReferenceSpace.bind(this);
    this.el.sceneEl.addEventListener('enter-vr', this.updateReferenceSpace);
    this.el.sceneEl.addEventListener('exit-vr', this.updateReferenceSpace);
  },

  updateReferenceSpace: function () {
    var self = this;
    var xrSession = this.el.sceneEl.xrSession;
    this.referenceSpace = undefined;
    if (!xrSession) { return; }
    var referenceSpaceType = self.el.sceneEl.systems.webxr.sessionReferenceSpaceType;
    xrSession.requestReferenceSpace(referenceSpaceType).then(function (referenceSpace) {
      self.referenceSpace = referenceSpace.getOffsetReferenceSpace(new XRRigidTransform({x: 0, y: 1.5, z: 0}));
    }).catch(function (error) {
      self.el.sceneEl.systems.webxr.warnIfFeatureNotRequested(referenceSpaceType, 'tracked-controls-webxr uses reference space ' + referenceSpaceType);
      throw error;
    });
  },

  checkIfControllerPresent: function () {
    var data = this.data;
    var hand = data.hand ? data.hand : undefined;
    checkControllerPresentAndSetup(
      this, '',
      {hand: hand, iterateControllerProfiles: true, handTracking: true});
  },

  play: function () {
    this.checkIfControllerPresent();
    this.addControllersUpdateListener();
  },

  tick: function () {
    var sceneEl = this.el.sceneEl;
    var controller = this.el.components['tracked-controls'] && this.el.components['tracked-controls'].controller;
    var frame = sceneEl.frame;
    var trackedControlsWebXR = this.el.components['tracked-controls-webxr'];
    if (!controller || !frame || !trackedControlsWebXR) { return; }
    if (controller.hand) {
      this.el.object3D.position.set(0, 0, 0);
      this.el.object3D.rotation.set(0, 0, 0);
      if (frame.getJointPose) { this.updateHandModel(); }
      this.detectGesture();
    }
  },

  updateHandModel: function () {
    if (this.data.modelStyle === 'dots') {
      this.updateHandDotsModel();
    }

    if (this.data.modelStyle === 'mesh') {
      this.updateHandMeshModel();
    }
  },

  getBone: function (name) {
    var bones = this.bones;
    for (var i = 0; i < bones.length; i++) {
      if (bones[i].name === name) { return bones[i]; }
    }
    return null;
  },

  updateHandMeshModel: function () {
    var frame = this.el.sceneEl.frame;
    var controller = this.el.components['tracked-controls'] && this.el.components['tracked-controls'].controller;
    var referenceSpace = this.referenceSpace;

    if (!controller || !this.mesh || !referenceSpace) { return; }
    this.mesh.visible = false;
    for (var inputjoint of controller.hand.values()) {
      var bone;
      var jointPose;
      var jointTransform;
      jointPose = frame.getJointPose(inputjoint, referenceSpace);
      if (!BONE_MAPPING[inputjoint.jointName]) { continue; }
      bone = this.getBone(BONE_PREFIX[this.data.hand] + BONE_MAPPING[inputjoint.jointName]);
      if (bone != null && jointPose) {
        jointTransform = jointPose.transform;
        this.mesh.visible = true;
        bone.position.copy(jointTransform.position).multiplyScalar(100);
        bone.quaternion.set(jointTransform.orientation.x, jointTransform.orientation.y, jointTransform.orientation.z, jointTransform.orientation.w);
      }
    }
  },

  updateHandDotsModel: function () {
    var frame = this.el.sceneEl.frame;
    var controller = this.el.components['tracked-controls'] && this.el.components['tracked-controls'].controller;
    var trackedControlsWebXR = this.el.components['tracked-controls-webxr'];
    var referenceSpace = trackedControlsWebXR.system.referenceSpace;
    var jointEl;
    var object3D;
    var jointPose;
    var i = 0;

    for (var inputjoint of controller.hand.values()) {
      jointEl = this.jointEls[i++];
      object3D = jointEl.object3D;
      jointPose = frame.getJointPose(inputjoint, referenceSpace);
      jointEl.object3D.visible = !!jointPose;
      if (!jointPose) { continue; }
      object3D.matrix.elements = jointPose.transform.matrix;
      object3D.matrix.decompose(object3D.position, object3D.rotation, object3D.scale);
      jointEl.setAttribute('scale', {x: jointPose.radius, y: jointPose.radius, z: jointPose.radius});
    }
  },

  detectGesture: function () {
    this.detectPinch();
  },

  detectPinch: (function () {
    var thumbTipPosition = new THREE.Vector3();
    return function () {
      var frame = this.el.sceneEl.frame;
      var indexTipPosition = this.indexTipPosition;
      var controller = this.el.components['tracked-controls'] && this.el.components['tracked-controls'].controller;
      var trackedControlsWebXR = this.el.components['tracked-controls-webxr'];
      var referenceSpace = this.referenceSpace || trackedControlsWebXR.system.referenceSpace;
      var indexTip = controller.hand.get('index-finger-tip');
      var thumbTip = controller.hand.get('thumb-tip');
      if (!indexTip ||
          !thumbTip) { return; }
      var indexTipPose = frame.getJointPose(indexTip, referenceSpace);
      var thumbTipPose = frame.getJointPose(thumbTip, referenceSpace);

      if (!indexTipPose || !thumbTipPose) { return; }

      thumbTipPosition.copy(thumbTipPose.transform.position);
      indexTipPosition.copy(indexTipPose.transform.position);

      var distance = indexTipPosition.distanceTo(thumbTipPosition);

      if (distance < PINCH_START_DISTANCE && this.isPinched === false) {
        this.isPinched = true;
        this.pinchEventDetail.position.copy(indexTipPosition).lerp(thumbTipPosition, PINCH_POSITION_INTERPOLATION);
        this.pinchEventDetail.position.y += 1.5;
        this.el.emit('pinchstarted', this.pinchEventDetail);
      }

      if (distance > PINCH_END_DISTANCE && this.isPinched === true) {
        this.isPinched = false;
        this.pinchEventDetail.position.copy(indexTipPosition).lerp(thumbTipPosition, PINCH_POSITION_INTERPOLATION);
        this.pinchEventDetail.position.y += 1.5;
        this.el.emit('pinchended', this.pinchEventDetail);
      }

      if (this.isPinched) {
        this.pinchEventDetail.position.copy(indexTipPosition).lerp(thumbTipPosition, PINCH_POSITION_INTERPOLATION);
        this.pinchEventDetail.position.y += 1.5;
        this.el.emit('pinchmoved', this.pinchEventDetail);
      }

      indexTipPosition.y += 1.5;
    };
  })(),

  pause: function () {
    this.removeEventListeners();
    this.removeControllersUpdateListener();
  },

  injectTrackedControls: function () {
    var el = this.el;
    var data = this.data;
    el.setAttribute('tracked-controls', {
      hand: data.hand,
      iterateControllerProfiles: true,
      handTrackingEnabled: true
    });
    this.initDefaultModel();
  },

  addControllersUpdateListener: function () {
    this.el.sceneEl.addEventListener('controllersupdated', this.onControllersUpdate, false);
  },

  removeControllersUpdateListener: function () {
    this.el.sceneEl.removeEventListener('controllersupdated', this.onControllersUpdate, false);
  },

  onControllersUpdate: function () {
    var controller;
    this.checkIfControllerPresent();
    controller = this.el.components['tracked-controls'] && this.el.components['tracked-controls'].controller;
    if (!this.el.getObject3D('mesh')) { return; }
    if (!controller || !controller.hand || !controller.hand[0]) {
      this.el.getObject3D('mesh').visible = false;
    }
  },

  initDefaultModel: function () {
    if (this.el.getObject3D('mesh')) { return; }
    if (this.data.modelStyle === 'dots') {
      this.initDotsModel();
    }

    if (this.data.modelStyle === 'mesh') {
      this.initMeshHandModel();
    }
  },

  initDotsModel: function () {
     // Add models just once.
    if (this.jointEls.length !== 0) { return; }
    for (var i = 0; i < JOINTS.length; ++i) {
      var jointEl = this.jointEl = document.createElement('a-entity');
      jointEl.setAttribute('geometry', {
        primitive: 'sphere',
        radius: 1.0
      });
      jointEl.setAttribute('material', {color: this.data.modelColor});
      jointEl.object3D.visible = false;
      this.el.appendChild(jointEl);
      this.jointEls.push(jointEl);
    }
  },

  initMeshHandModel: function () {
    var modelURL = this.data.hand === 'left' ? LEFT_HAND_MODEL_URL : RIGHT_HAND_MODEL_URL;
    this.el.setAttribute('gltf-model', modelURL);
  },

  onModelLoaded: function () {
    var mesh = this.mesh = this.el.getObject3D('mesh').children[0];
    var skinnedMesh = this.skinnedMesh = mesh.children[24];
    if (!this.skinnedMesh) { return; }
    this.bones = skinnedMesh.skeleton.bones;
    this.el.removeObject3D('mesh');
    mesh.position.set(0, 1.5, 0);
    mesh.rotation.set(0, 0, 0);
    skinnedMesh.frustumCulled = false;
    skinnedMesh.material = new THREE.MeshStandardMaterial({skinning: true, color: this.data.modelColor});
    this.el.setObject3D('mesh', mesh);
  }
});


},{"../core/component":113,"../utils/bind":181,"../utils/tracked-controls":196}],66:[function(_dereq_,module,exports){
_dereq_('./animation');
_dereq_('./camera');
_dereq_('./cursor');
_dereq_('./daydream-controls');
_dereq_('./gearvr-controls');
_dereq_('./geometry');
_dereq_('./generic-tracked-controller-controls');
_dereq_('./gltf-model');
_dereq_('./hand-tracking-controls');
_dereq_('./hand-controls');
_dereq_('./layer');
_dereq_('./laser-controls');
_dereq_('./light');
_dereq_('./line');
_dereq_('./link');
_dereq_('./look-controls');
_dereq_('./magicleap-controls');
_dereq_('./material');
_dereq_('./obj-model');
_dereq_('./oculus-go-controls');
_dereq_('./oculus-touch-controls');
_dereq_('./position');
_dereq_('./raycaster');
_dereq_('./rotation');
_dereq_('./scale');
_dereq_('./shadow');
_dereq_('./sound');
_dereq_('./text');
_dereq_('./tracked-controls');
_dereq_('./tracked-controls-webvr');
_dereq_('./tracked-controls-webxr');
_dereq_('./visible');
_dereq_('./valve-index-controls');
_dereq_('./vive-controls');
_dereq_('./vive-focus-controls');
_dereq_('./wasd-controls');
_dereq_('./windows-motion-controls');

_dereq_('./scene/background');
_dereq_('./scene/debug');
_dereq_('./scene/device-orientation-permission-ui');
_dereq_('./scene/embedded');
_dereq_('./scene/inspector');
_dereq_('./scene/fog');
_dereq_('./scene/keyboard-shortcuts');
_dereq_('./scene/pool');
_dereq_('./scene/screenshot');
_dereq_('./scene/stats');
_dereq_('./scene/vr-mode-ui');

},{"./animation":56,"./camera":57,"./cursor":58,"./daydream-controls":59,"./gearvr-controls":60,"./generic-tracked-controller-controls":61,"./geometry":62,"./gltf-model":63,"./hand-controls":64,"./hand-tracking-controls":65,"./laser-controls":67,"./layer":68,"./light":69,"./line":70,"./link":71,"./look-controls":72,"./magicleap-controls":73,"./material":74,"./obj-model":75,"./oculus-go-controls":76,"./oculus-touch-controls":77,"./position":78,"./raycaster":79,"./rotation":80,"./scale":81,"./scene/background":82,"./scene/debug":83,"./scene/device-orientation-permission-ui":84,"./scene/embedded":85,"./scene/fog":86,"./scene/inspector":87,"./scene/keyboard-shortcuts":88,"./scene/pool":89,"./scene/screenshot":90,"./scene/stats":91,"./scene/vr-mode-ui":92,"./shadow":93,"./sound":94,"./text":95,"./tracked-controls":98,"./tracked-controls-webvr":96,"./tracked-controls-webxr":97,"./valve-index-controls":99,"./visible":100,"./vive-controls":101,"./vive-focus-controls":102,"./wasd-controls":103,"./windows-motion-controls":104}],67:[function(_dereq_,module,exports){
var registerComponent = _dereq_('../core/component').registerComponent;
var utils = _dereq_('../utils/');

registerComponent('laser-controls', {
  schema: {
    hand: {default: 'right'},
    model: {default: true},
    defaultModelColor: {type: 'color', default: 'grey'}
  },

  init: function () {
    var config = this.config;
    var data = this.data;
    var el = this.el;
    var self = this;
    var controlsConfiguration = {hand: data.hand, model: data.model};

    // Set all controller models.
    el.setAttribute('daydream-controls', controlsConfiguration);
    el.setAttribute('gearvr-controls', controlsConfiguration);
    el.setAttribute('magicleap-controls', controlsConfiguration);
    el.setAttribute('oculus-go-controls', controlsConfiguration);
    el.setAttribute('oculus-touch-controls', controlsConfiguration);
    el.setAttribute('valve-index-controls', controlsConfiguration);
    el.setAttribute('vive-controls', controlsConfiguration);
    el.setAttribute('vive-focus-controls', controlsConfiguration);
    el.setAttribute('windows-motion-controls', controlsConfiguration);
    el.setAttribute('generic-tracked-controller-controls', controlsConfiguration);

    // Wait for controller to connect, or have a valid pointing pose, before creating ray
    el.addEventListener('controllerconnected', createRay);
    el.addEventListener('controllerdisconnected', hideRay);
    el.addEventListener('controllermodelready', function (evt) {
      createRay(evt);
      self.modelReady = true;
    });

    function createRay (evt) {
      var controllerConfig = config[evt.detail.name];

      if (!controllerConfig) { return; }

      // Show the line unless a particular config opts to hide it, until a controllermodelready
      // event comes through.
      var raycasterConfig = utils.extend({
        showLine: true
      }, controllerConfig.raycaster || {});

      // The controllermodelready event contains a rayOrigin that takes into account
      // offsets specific to the loaded model.
      if (evt.detail.rayOrigin) {
        raycasterConfig.origin = evt.detail.rayOrigin.origin;
        raycasterConfig.direction = evt.detail.rayOrigin.direction;
        raycasterConfig.showLine = true;
      }

      // Only apply a default raycaster if it does not yet exist. This prevents it overwriting
      // config applied from a controllermodelready event.
      if (evt.detail.rayOrigin || !self.modelReady) {
        el.setAttribute('raycaster', raycasterConfig);
      } else {
        el.setAttribute('raycaster', 'showLine', true);
      }

      el.setAttribute('cursor', utils.extend({
        fuse: false
      }, controllerConfig.cursor));
    }

    function hideRay () {
      el.setAttribute('raycaster', 'showLine', false);
    }
  },

  config: {
    'daydream-controls': {
      cursor: {downEvents: ['trackpaddown', 'triggerdown'], upEvents: ['trackpadup', 'triggerup']}
    },

    'gearvr-controls': {
      cursor: {downEvents: ['triggerdown'], upEvents: ['triggerup']},
      raycaster: {origin: {x: 0, y: 0.0010, z: 0}}
    },

    'generic-tracked-controller-controls': {
      cursor: {downEvents: ['triggerdown'], upEvents: ['triggerup']}
    },

    'magicleap-controls': {
      cursor: {downEvents: ['trackpaddown', 'triggerdown'], upEvents: ['trackpadup', 'triggerup']}
    },

    'oculus-go-controls': {
      cursor: {downEvents: ['triggerdown'], upEvents: ['triggerup']},
      raycaster: {origin: {x: 0, y: 0.0005, z: 0}}
    },

    'oculus-touch-controls': {
      cursor: {downEvents: ['triggerdown'], upEvents: ['triggerup']},
      raycaster: {origin: {x: 0, y: 0, z: 0}}
    },

    'valve-index-controls': {
      cursor: {downEvents: ['triggerdown'], upEvents: ['triggerup']}
    },

    'vive-controls': {
      cursor: {downEvents: ['triggerdown'], upEvents: ['triggerup']}
    },

    'vive-focus-controls': {
      cursor: {downEvents: ['trackpaddown', 'triggerdown'], upEvents: ['trackpadup', 'triggerup']}
    },

    'windows-motion-controls': {
      cursor: {downEvents: ['triggerdown'], upEvents: ['triggerup']},
      raycaster: {showLine: false}
    }
  }
});

},{"../core/component":113,"../utils/":187}],68:[function(_dereq_,module,exports){
/* global THREE, XRRigidTransform, XRWebGLBinding */
var registerComponent = _dereq_('../core/component').registerComponent;
var utils = _dereq_('../utils/');
var warn = utils.debug('components:layer:warn');

module.exports.Component = registerComponent('layer', {
  schema: {
    type: {default: 'quad', oneOf: ['quad', 'monocubemap', 'stereocubemap']},
    src: {type: 'map'},
    rotateCubemap: {default: false},
    width: {default: 0},
    height: {default: 0}
  },

  init: function () {
    var gl = this.el.sceneEl.renderer.getContext();

    this.quaternion = new THREE.Quaternion();
    this.position = new THREE.Vector3();

    this.bindMethods();
    this.needsRedraw = false;
    this.frameBuffer = gl.createFramebuffer();
    var requiredFeatures = this.el.sceneEl.getAttribute('webxr').requiredFeatures;
    requiredFeatures.push('layers');
    this.el.sceneEl.getAttribute('webxr', 'requiredFeatures', requiredFeatures);
    this.el.sceneEl.addEventListener('enter-vr', this.onEnterVR);
    this.el.sceneEl.addEventListener('exit-vr', this.onExitVR);
  },

  bindMethods: function () {
    this.onRequestedReferenceSpace = this.onRequestedReferenceSpace.bind(this);
    this.onEnterVR = this.onEnterVR.bind(this);
    this.onExitVR = this.onExitVR.bind(this);
  },

  update: function (oldData) {
    if (this.data.src !== oldData.src) { this.updateSrc(); }
  },

  updateSrc: function () {
    var type = this.data.type;
    this.texture = undefined;
    if (type === 'quad') {
      this.loadQuadImage();
      return;
    }

    if (type === 'monocubemap' || type === 'stereocubemap') {
      this.loadCubeMapImages();
      return;
    }
  },

  loadCubeMapImages: function () {
    var type = this.data.type;
    var glayer;
    var xrGLFactory = this.xrGLFactory;
    var frame = this.el.sceneEl.frame;
    var src = this.data.src;

    this.visibilityChanged = false;
    if (!this.layer) { return; }
    if (!src.complete) {
      this.pendingCubeMapUpdate = true;
    } else {
      this.pendingCubeMapUpdate = false;
    }

    if (!this.loadingScreen) {
      this.loadingScreen = true;
    } else {
      this.loadingScreen = false;
    }

    if (type === 'monocubemap') {
      glayer = xrGLFactory.getSubImage(this.layer, frame);
      this.loadCubeMapImage(glayer.colorTexture, src, 0);
    } else {
      glayer = xrGLFactory.getSubImage(this.layer, frame, 'left');
      this.loadCubeMapImage(glayer.colorTexture, src, 0);
      glayer = xrGLFactory.getSubImage(this.layer, frame, 'right');
      this.loadCubeMapImage(glayer.colorTexture, src, 6);
    }
  },

  loadQuadImage: function () {
    var src = this.data.src;
    var self = this;
    this.el.sceneEl.systems.material.loadTexture(src, {src: src}, function textureLoaded (texture) {
      self.el.sceneEl.renderer.initTexture(texture);
      self.texture = texture;
      if (src.tagName === 'VIDEO') { setTimeout(function () { self.textureIsVideo = true; }, 1000); }
      if (self.layer) {
        self.layer.height = self.data.height / 2 || self.texture.image.height / 1000;
        self.layer.width = self.data.width / 2 || self.texture.image.width / 1000;
        self.needsRedraw = true;
      }
      self.updateQuadPanel();
    });
  },

  preGenerateCubeMapTextures: function (src, callback) {
    if (this.data.type === 'monocubemap') {
      this.generateCubeMapTextures(src, 0, callback);
    } else {
      this.generateCubeMapTextures(src, 0, callback);
      this.generateCubeMapTextures(src, 6, callback);
    }
  },

  generateCubeMapTextures: function (src, faceOffset, callback) {
    var data = this.data;
    var cubeFaceSize = this.cubeFaceSize;
    var textureSourceCubeFaceSize = Math.min(src.width, src.height);
    var cubefaceTextures = [];
    var imgTmp0;
    var imgTmp2;

    for (var i = 0; i < 6; i++) {
      var tempCanvas = document.createElement('CANVAS');
      tempCanvas.width = tempCanvas.height = cubeFaceSize;
      var tempCanvasContext = tempCanvas.getContext('2d');

      if (data.rotateCubemap) {
        if (i === 2 || i === 3) {
          tempCanvasContext.save();
          tempCanvasContext.translate(cubeFaceSize, cubeFaceSize);
          tempCanvasContext.rotate(Math.PI);
        }
      }

      // Note that this call to drawImage will not only copy the bytes to the
      // canvas but also could resized the image if our cube face size is
      // smaller than the source image due to GL max texture size.
      tempCanvasContext.drawImage(
        src,
        (i + faceOffset) * textureSourceCubeFaceSize, // top left x coord in source
        0, // top left y coord in source
        textureSourceCubeFaceSize, // x pixel count from source
        textureSourceCubeFaceSize, // y pixel count from source
        0, // dest x offset in the canvas
        0, // dest y offset in the canvas
        cubeFaceSize, // x pixel count in dest
        cubeFaceSize  // y pixel count in dest
      );

      tempCanvasContext.restore();

      if (callback) { callback(); }
      cubefaceTextures.push(tempCanvas);
    }

    if (data.rotateCubemap) {
      imgTmp0 = cubefaceTextures[0];
      imgTmp2 = cubefaceTextures[1];

      cubefaceTextures[0] = imgTmp2;
      cubefaceTextures[1] = imgTmp0;

      imgTmp0 = cubefaceTextures[4];
      imgTmp2 = cubefaceTextures[5];

      cubefaceTextures[4] = imgTmp2;
      cubefaceTextures[5] = imgTmp0;
    }

    if (callback) { callback(); }
    return cubefaceTextures;
  },

  loadCubeMapImage: function (layerColorTexture, src, faceOffset) {
    var gl = this.el.sceneEl.renderer.getContext();
    var cubefaceTextures;

    // dont flip the pixels as we load them into the texture buffer.
    // TEXTURE_CUBE_MAP expects the Y to be flipped for the faces and it already
    // is flipped in our texture image.
    gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, false);
    gl.bindTexture(gl.TEXTURE_CUBE_MAP, layerColorTexture);

    if (!src.complete || this.loadingScreen) {
      cubefaceTextures = this.loadingScreenImages;
    } else {
      cubefaceTextures = this.generateCubeMapTextures(src, faceOffset);
    }

    var errorCode = 0;
    cubefaceTextures.forEach(function (canvas, i) {
      gl.texSubImage2D(
        gl.TEXTURE_CUBE_MAP_POSITIVE_X + i,
        0,
        0, 0,
        gl.RGBA,
        gl.UNSIGNED_BYTE,
        canvas
      );
      errorCode = gl.getError();
    });

    if (errorCode !== 0) {
      console.log('renderingError, WebGL Error Code: ' + errorCode);
    }
    gl.bindTexture(gl.TEXTURE_CUBE_MAP, null);
  },

  tick: function () {
    if (!this.el.sceneEl.xrSession) { return; }
    if (!this.layer && this.el.sceneEl.is('vr-mode')) { this.initLayer(); }
    this.updateTransform();
    if (this.data.src.complete && (this.pendingCubeMapUpdate || this.loadingScreen || this.visibilityChanged)) { this.loadCubeMapImages(); }
    if (!this.needsRedraw && !this.layer.needsRedraw && !this.textureIsVideo) { return; }
    if (this.data.type === 'quad') { this.draw(); }
    this.needsRedraw = false;
  },

  initLayer: function () {
    var self = this;
    var type = this.data.type;

    this.el.sceneEl.xrSession.onvisibilitychange = function (evt) {
      self.visibilityChanged = evt.session.visibilityState !== 'hidden';
    };

    if (type === 'quad') {
      this.initQuadLayer();
      return;
    }

    if (type === 'monocubemap' || type === 'stereocubemap') {
      this.initCubeMapLayer();
      return;
    }
  },

  initQuadLayer: function () {
    var sceneEl = this.el.sceneEl;
    var gl = sceneEl.renderer.getContext();
    var xrGLFactory = this.xrGLFactory = new XRWebGLBinding(sceneEl.xrSession, gl);
    if (!this.texture) { return; }
    this.layer = xrGLFactory.createQuadLayer({
      space: this.referenceSpace,
      viewPixelHeight: 2048,
      viewPixelWidth: 2048,
      height: this.data.height / 2 || this.texture.image.height / 1000,
      width: this.data.width / 2 || this.texture.image.width / 1000
    });
    sceneEl.renderer.xr.addLayer(this.layer);
  },

  initCubeMapLayer: function () {
    var src = this.data.src;
    var sceneEl = this.el.sceneEl;
    var gl = sceneEl.renderer.getContext();
    var glSizeLimit = gl.getParameter(gl.MAX_CUBE_MAP_TEXTURE_SIZE);
    var cubeFaceSize = this.cubeFaceSize = Math.min(glSizeLimit, Math.min(src.width, src.height));
    var xrGLFactory = this.xrGLFactory = new XRWebGLBinding(sceneEl.xrSession, gl);
    this.layer = xrGLFactory.createCubeLayer({
      space: this.referenceSpace,
      viewPixelWidth: cubeFaceSize,
      viewPixelHeight: cubeFaceSize,
      layout: this.data.type === 'monocubemap' ? 'mono' : 'stereo',
      isStatic: false
    });

    this.initLoadingScreenImages();
    this.loadCubeMapImages();
    sceneEl.renderer.xr.addLayer(this.layer);
  },

  initLoadingScreenImages: function () {
    var cubeFaceSize = this.cubeFaceSize;
    var loadingScreenImages = this.loadingScreenImages = [];
    for (var i = 0; i < 6; i++) {
      var tempCanvas = document.createElement('CANVAS');
      tempCanvas.width = tempCanvas.height = cubeFaceSize;
      var tempCanvasContext = tempCanvas.getContext('2d');
      tempCanvas.width = tempCanvas.height = cubeFaceSize;
      tempCanvasContext.fillStyle = 'black';
      tempCanvasContext.fillRect(0, 0, cubeFaceSize, cubeFaceSize);
      if (i !== 2 && i !== 3) {
        tempCanvasContext.translate(cubeFaceSize, 0);
        tempCanvasContext.scale(-1, 1);
        tempCanvasContext.fillStyle = 'white';
        tempCanvasContext.font = '30px Arial';
        tempCanvasContext.fillText('Loading', cubeFaceSize / 2, cubeFaceSize / 2);
      }
      loadingScreenImages.push(tempCanvas);
    }
  },

  destroyLayer: function () {
    if (!this.layer) { return; }
    this.el.sceneEl.renderer.xr.removeLayer(this.layer);
    this.layer.destroy();
    this.layer = undefined;
  },

  toggleCompositorLayer: function () {
    this.enableCompositorLayer(!this.layerEnabled);
  },

  enableCompositorLayer: function (enable) {
    this.layerEnabled = enable;
    this.quadPanelEl.object3D.visible = !this.layerEnabled;
  },

  updateQuadPanel: function () {
    var quadPanelEl = this.quadPanelEl;
    if (!this.quadPanelEl) {
      quadPanelEl = this.quadPanelEl = document.createElement('a-entity');
      this.el.appendChild(quadPanelEl);
    }

    quadPanelEl.setAttribute('material', {
      shader: 'flat',
      src: this.data.src,
      transparent: true
    });

    quadPanelEl.setAttribute('geometry', {
      primitive: 'plane',
      height: this.data.height || this.texture.image.height / 1000,
      width: this.data.width || this.texture.image.height / 1000
    });
  },

  draw: function () {
    var sceneEl = this.el.sceneEl;
    var gl = this.el.sceneEl.renderer.getContext();
    var glayer = this.xrGLFactory.getSubImage(this.layer, sceneEl.frame);
    var texture = sceneEl.renderer.properties.get(this.texture).__webglTexture;
    var previousFrameBuffer = gl.getParameter(gl.FRAMEBUFFER_BINDING);

    gl.viewport(glayer.viewport.x, glayer.viewport.y, glayer.viewport.width, glayer.viewport.height);
    gl.bindFramebuffer(gl.FRAMEBUFFER, this.frameBuffer);
    gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, glayer.colorTexture, 0);

    blitTexture(gl, texture, glayer, this.data.src);

    gl.bindFramebuffer(gl.FRAMEBUFFER, previousFrameBuffer);
  },

  updateTransform: function () {
    var el = this.el;
    var position = this.position;
    var quaternion = this.quaternion;
    el.object3D.updateMatrixWorld();
    position.setFromMatrixPosition(el.object3D.matrixWorld);
    quaternion.setFromRotationMatrix(el.object3D.matrixWorld);
    if (!this.layerEnabled) { position.set(0, 0, 100000000); }
    this.layer.transform = new XRRigidTransform(position, quaternion);
  },

  onEnterVR: function () {
    var sceneEl = this.el.sceneEl;
    var xrSession = sceneEl.xrSession;
    if (!sceneEl.hasWebXR || !XRWebGLBinding || !xrSession) {
      warn('The layer component requires WebXR and the layers API enabled');
      return;
    }
    xrSession.requestReferenceSpace('local').then(this.onRequestedReferenceSpace);
    this.needsRedraw = true;
    this.layerEnabled = true;
    if (this.quadPanelEl) {
      this.quadPanelEl.object3D.visible = false;
    }
    if (this.data.src.play) { this.data.src.play(); }
  },

  onExitVR: function () {
    if (this.quadPanelEl) {
      this.quadPanelEl.object3D.visible = true;
    }
    this.destroyLayer();
  },

  onRequestedReferenceSpace: function (referenceSpace) {
    this.referenceSpace = referenceSpace;
  }
});

function blitTexture (gl, texture, subImage, textureEl) {
  var xrReadFramebuffer = gl.createFramebuffer();
  let x1offset = subImage.viewport.x;
  let y1offset = subImage.viewport.y;
  let x2offset = subImage.viewport.x + subImage.viewport.width;
  let y2offset = subImage.viewport.y + subImage.viewport.height;

  // Update video texture.
  if (textureEl.tagName === 'VIDEO') {
    gl.bindTexture(gl.TEXTURE_2D, texture);
    gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, textureEl.width, textureEl.height, gl.RGB, gl.UNSIGNED_BYTE, textureEl);
  }

  // Bind texture to read framebuffer.
  gl.bindFramebuffer(gl.READ_FRAMEBUFFER, xrReadFramebuffer);
  gl.framebufferTexture2D(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);

  // Blit into layer buffer.
  gl.readBuffer(gl.COLOR_ATTACHMENT0);
  gl.blitFramebuffer(0, 0, textureEl.width, textureEl.height, x1offset, y1offset, x2offset, y2offset, gl.COLOR_BUFFER_BIT, gl.NEAREST);

  gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null);
  gl.deleteFramebuffer(xrReadFramebuffer);
}

},{"../core/component":113,"../utils/":187}],69:[function(_dereq_,module,exports){
var bind = _dereq_('../utils/bind');
var diff = _dereq_('../utils').diff;
var debug = _dereq_('../utils/debug');
var registerComponent = _dereq_('../core/component').registerComponent;
var THREE = _dereq_('../lib/three');

var degToRad = THREE.Math.degToRad;
var warn = debug('components:light:warn');

/**
 * Light component.
 */
module.exports.Component = registerComponent('light', {
  schema: {
    angle: {default: 60, if: {type: ['spot']}},
    color: {type: 'color'},
    groundColor: {type: 'color', if: {type: ['hemisphere']}},
    decay: {default: 1, if: {type: ['point', 'spot']}},
    distance: {default: 0.0, min: 0, if: {type: ['point', 'spot']}},
    intensity: {default: 1.0, min: 0, if: {type: ['ambient', 'directional', 'hemisphere', 'point', 'spot']}},
    penumbra: {default: 0, min: 0, max: 1, if: {type: ['spot']}},
    type: {
      default: 'directional',
      oneOf: ['ambient', 'directional', 'hemisphere', 'point', 'spot'],
      schemaChange: true
    },
    target: {type: 'selector', if: {type: ['spot', 'directional']}},

    // Shadows.
    castShadow: {default: false, if: {type: ['point', 'spot', 'directional']}},
    shadowBias: {default: 0, if: {castShadow: true}},
    shadowCameraFar: {default: 500, if: {castShadow: true}},
    shadowCameraFov: {default: 90, if: {castShadow: true}},
    shadowCameraNear: {default: 0.5, if: {castShadow: true}},
    shadowCameraTop: {default: 5, if: {castShadow: true}},
    shadowCameraRight: {default: 5, if: {castShadow: true}},
    shadowCameraBottom: {default: -5, if: {castShadow: true}},
    shadowCameraLeft: {default: -5, if: {castShadow: true}},
    shadowCameraVisible: {default: false, if: {castShadow: true}},
    shadowMapHeight: {default: 512, if: {castShadow: true}},
    shadowMapWidth: {default: 512, if: {castShadow: true}},
    shadowRadius: {default: 1, if: {castShadow: true}}
  },

  /**
   * Notifies scene a light has been added to remove default lighting.
   */
  init: function () {
    var el = this.el;
    this.light = null;
    this.defaultTarget = null;
    this.rendererSystem = this.el.sceneEl.systems.renderer;
    this.system.registerLight(el);
  },

  /**
   * (Re)create or update light.
   */
  update: function (oldData) {
    var data = this.data;
    var diffData = diff(data, oldData);
    var light = this.light;
    var rendererSystem = this.rendererSystem;
    var self = this;

    // Existing light.
    if (light && !('type' in diffData)) {
      var shadowsLoaded = false;
      // Light type has not changed. Update light.
      Object.keys(diffData).forEach(function (key) {
        var value = data[key];

        switch (key) {
          case 'color': {
            light.color.set(value);
            rendererSystem.applyColorCorrection(light.color);
            break;
          }

          case 'groundColor': {
            light.groundColor.set(value);
            rendererSystem.applyColorCorrection(light.groundColor);
            break;
          }

          case 'angle': {
            light.angle = degToRad(value);
            break;
          }

          case 'target': {
            // Reset target if selector is null.
            if (value === null) {
              if (data.type === 'spot' || data.type === 'directional') {
                light.target = self.defaultTarget;
              }
            } else {
              // Target specified, set target to entity's `object3D` when it is loaded.
              if (value.hasLoaded) {
                self.onSetTarget(value, light);
              } else {
                value.addEventListener('loaded', bind(self.onSetTarget, self, value, light));
              }
            }
            break;
          }

          case 'castShadow':
          case 'shadowBias':
          case 'shadowCameraFar':
          case 'shadowCameraFov':
          case 'shadowCameraNear':
          case 'shadowCameraTop':
          case 'shadowCameraRight':
          case 'shadowCameraBottom':
          case 'shadowCameraLeft':
          case 'shadowCameraVisible':
          case 'shadowMapHeight':
          case 'shadowMapWidth':
          case 'shadowRadius':
            if (!shadowsLoaded) {
              self.updateShadow();
              shadowsLoaded = true;
            }
            break;

          default: {
            light[key] = value;
          }
        }
      });
      return;
    }

    // No light yet or light type has changed. Create and add light.
    this.setLight(this.data);
    this.updateShadow();
  },

  setLight: function (data) {
    var el = this.el;
    var newLight = this.getLight(data);
    if (newLight) {
      if (this.light) {
        el.removeObject3D('light');
      }

      this.light = newLight;
      this.light.el = el;
      el.setObject3D('light', this.light);

      // HACK solution for issue #1624
      if (data.type === 'spot' || data.type === 'directional' || data.type === 'hemisphere') {
        el.getObject3D('light').translateY(-1);
      }

      // set and position default lighttarget as a child to enable spotlight orientation
      if (data.type === 'spot') {
        el.setObject3D('light-target', this.defaultTarget);
        el.getObject3D('light-target').position.set(0, 0, -1);
      }
    }
  },

  /**
   * Updates shadow-related properties on the current light.
   */
  updateShadow: function () {
    var el = this.el;
    var data = this.data;
    var light = this.light;

    light.castShadow = data.castShadow;

    // Shadow camera helper.
    var cameraHelper = el.getObject3D('cameraHelper');
    if (data.shadowCameraVisible && !cameraHelper) {
      el.setObject3D('cameraHelper', new THREE.CameraHelper(light.shadow.camera));
    } else if (!data.shadowCameraVisible && cameraHelper) {
      el.removeObject3D('cameraHelper');
    }

    if (!data.castShadow) { return light; }

    // Shadow appearance.
    light.shadow.bias = data.shadowBias;
    light.shadow.radius = data.shadowRadius;
    light.shadow.mapSize.height = data.shadowMapHeight;
    light.shadow.mapSize.width = data.shadowMapWidth;

    // Shadow camera.
    light.shadow.camera.near = data.shadowCameraNear;
    light.shadow.camera.far = data.shadowCameraFar;
    if (light.shadow.camera instanceof THREE.OrthographicCamera) {
      light.shadow.camera.top = data.shadowCameraTop;
      light.shadow.camera.right = data.shadowCameraRight;
      light.shadow.camera.bottom = data.shadowCameraBottom;
      light.shadow.camera.left = data.shadowCameraLeft;
    } else {
      light.shadow.camera.fov = data.shadowCameraFov;
    }
    light.shadow.camera.updateProjectionMatrix();

    if (cameraHelper) { cameraHelper.update(); }
  },

  /**
   * Creates a new three.js light object given data object defining the light.
   *
   * @param {object} data
   */
  getLight: function (data) {
    var angle = data.angle;
    var color = new THREE.Color(data.color);
    this.rendererSystem.applyColorCorrection(color);
    color = color.getHex();
    var decay = data.decay;
    var distance = data.distance;
    var groundColor = new THREE.Color(data.groundColor);
    this.rendererSystem.applyColorCorrection(groundColor);
    groundColor = groundColor.getHex();
    var intensity = data.intensity;
    var type = data.type;
    var target = data.target;
    var light = null;

    switch (type.toLowerCase()) {
      case 'ambient': {
        return new THREE.AmbientLight(color, intensity);
      }

      case 'directional': {
        light = new THREE.DirectionalLight(color, intensity);
        this.defaultTarget = light.target;
        if (target) {
          if (target.hasLoaded) {
            this.onSetTarget(target, light);
          } else {
            target.addEventListener('loaded', bind(this.onSetTarget, this, target, light));
          }
        }
        return light;
      }

      case 'hemisphere': {
        return new THREE.HemisphereLight(color, groundColor, intensity);
      }

      case 'point': {
        return new THREE.PointLight(color, intensity, distance, decay);
      }

      case 'spot': {
        light = new THREE.SpotLight(color, intensity, distance, degToRad(angle), data.penumbra, decay);
        this.defaultTarget = light.target;
        if (target) {
          if (target.hasLoaded) {
            this.onSetTarget(target, light);
          } else {
            target.addEventListener('loaded', bind(this.onSetTarget, this, target, light));
          }
        }
        return light;
      }

      default: {
        warn('%s is not a valid light type. ' +
           'Choose from ambient, directional, hemisphere, point, spot.', type);
      }
    }
  },

  onSetTarget: function (targetEl, light) {
    light.target = targetEl.object3D;
  },

  /**
   * Remove light on remove (callback).
   */
  remove: function () {
    var el = this.el;
    el.removeObject3D('light');
    if (el.getObject3D('cameraHelper')) {
      el.removeObject3D('cameraHelper');
    }
  }
});

},{"../core/component":113,"../lib/three":161,"../utils":187,"../utils/bind":181,"../utils/debug":183}],70:[function(_dereq_,module,exports){
/* global THREE */
var registerComponent = _dereq_('../core/component').registerComponent;

module.exports.Component = registerComponent('line', {
  schema: {
    start: {type: 'vec3', default: {x: 0, y: 0, z: 0}},
    end: {type: 'vec3', default: {x: 0, y: 0, z: 0}},
    color: {type: 'color', default: '#74BEC1'},
    opacity: {type: 'number', default: 1},
    visible: {default: true}
  },

  multiple: true,

  init: function () {
    var data = this.data;
    var geometry;
    var material;
    this.rendererSystem = this.el.sceneEl.systems.renderer;
    material = this.material = new THREE.LineBasicMaterial({
      color: data.color,
      opacity: data.opacity,
      transparent: data.opacity < 1,
      visible: data.visible
    });
    geometry = this.geometry = new THREE.BufferGeometry();
    geometry.setAttribute('position', new THREE.BufferAttribute(new Float32Array(2 * 3), 3));

    this.rendererSystem.applyColorCorrection(material.color);
    this.line = new THREE.Line(geometry, material);
    this.el.setObject3D(this.attrName, this.line);
  },

  update: function (oldData) {
    var data = this.data;
    var geometry = this.geometry;
    var geoNeedsUpdate = false;
    var material = this.material;
    var positionArray = geometry.attributes.position.array;

    // Update geometry.
    if (!isEqualVec3(data.start, oldData.start)) {
      positionArray[0] = data.start.x;
      positionArray[1] = data.start.y;
      positionArray[2] = data.start.z;
      geoNeedsUpdate = true;
    }

    if (!isEqualVec3(data.end, oldData.end)) {
      positionArray[3] = data.end.x;
      positionArray[4] = data.end.y;
      positionArray[5] = data.end.z;
      geoNeedsUpdate = true;
    }

    if (geoNeedsUpdate) {
      geometry.attributes.position.needsUpdate = true;
      geometry.computeBoundingSphere();
    }

    material.color.setStyle(data.color);
    this.rendererSystem.applyColorCorrection(material.color);
    material.opacity = data.opacity;
    material.transparent = data.opacity < 1;
    material.visible = data.visible;
  },

  remove: function () {
    this.el.removeObject3D('line', this.line);
  }
});

function isEqualVec3 (a, b) {
  if (!a || !b) { return false; }
  return (a.x === b.x && a.y === b.y && a.z === b.z);
}

},{"../core/component":113}],71:[function(_dereq_,module,exports){
var registerComponent = _dereq_('../core/component').registerComponent;
var registerShader = _dereq_('../core/shader').registerShader;
var THREE = _dereq_('../lib/three');

/**
 * Link component. Connect experiences and traverse between them in VR
 *
 * @member {object} hiddenEls - Store the hidden elements during peek mode.
 */
module.exports.Component = registerComponent('link', {
  schema: {
    backgroundColor: {default: 'red', type: 'color'},
    borderColor: {default: 'white', type: 'color'},
    highlighted: {default: false},
    highlightedColor: {default: '#24CAFF', type: 'color'},
    href: {default: ''},
    image: {type: 'asset'},
    on: {default: 'click'},
    peekMode: {default: false},
    title: {default: ''},
    titleColor: {default: 'white', type: 'color'},
    visualAspectEnabled: {default: false}
  },

  init: function () {
    this.navigate = this.navigate.bind(this);
    this.previousQuaternion = undefined;
    this.quaternionClone = new THREE.Quaternion();
    // Store hidden elements during peek mode so we can show them again later.
    this.hiddenEls = [];
  },

  update: function (oldData) {
    var data = this.data;
    var el = this.el;
    var backgroundColor;
    var strokeColor;

    if (!data.visualAspectEnabled) { return; }

    this.initVisualAspect();

    backgroundColor = data.highlighted ? data.highlightedColor : data.backgroundColor;
    strokeColor = data.highlighted ? data.highlightedColor : data.borderColor;
    el.setAttribute('material', 'backgroundColor', backgroundColor);
    el.setAttribute('material', 'strokeColor', strokeColor);

    if (data.on !== oldData.on) { this.updateEventListener(); }

    if (oldData.peekMode !== undefined &&
        data.peekMode !== oldData.peekMode) { this.updatePeekMode(); }

    if (!data.image || oldData.image === data.image) { return; }

    el.setAttribute('material', 'pano',
                    typeof data.image === 'string' ? data.image : data.image.src);
  },

  /*
   * Toggle all elements and full 360 preview of the linked page.
   */
  updatePeekMode: function () {
    var el = this.el;
    var sphereEl = this.sphereEl;
    if (this.data.peekMode) {
      this.hideAll();
      el.getObject3D('mesh').visible = false;
      sphereEl.setAttribute('visible', true);
    } else {
      this.showAll();
      el.getObject3D('mesh').visible = true;
      sphereEl.setAttribute('visible', false);
    }
  },

  play: function () {
    this.updateEventListener();
  },

  pause: function () {
    this.removeEventListener();
  },

  updateEventListener: function () {
    var el = this.el;
    if (!el.isPlaying) { return; }
    this.removeEventListener();
    el.addEventListener(this.data.on, this.navigate);
  },

  removeEventListener: function () {
    var on = this.data.on;
    if (!on) { return; }
    this.el.removeEventListener(on, this.navigate);
  },

  initVisualAspect: function () {
    var el = this.el;
    var semiSphereEl;
    var sphereEl;
    var textEl;

    if (!this.data.visualAspectEnabled || this.visualAspectInitialized) { return; }

    textEl = this.textEl = this.textEl || document.createElement('a-entity');
    sphereEl = this.sphereEl = this.sphereEl || document.createElement('a-entity');
    semiSphereEl = this.semiSphereEl = this.semiSphereEl || document.createElement('a-entity');

    // Set portal.
    el.setAttribute('geometry', {primitive: 'circle', radius: 1.0, segments: 64});
    el.setAttribute('material', {shader: 'portal', pano: this.data.image, side: 'double'});

    // Set text that displays the link title and URL.
    textEl.setAttribute('text', {
      color: this.data.titleColor,
      align: 'center',
      font: 'kelsonsans',
      value: this.data.title || this.data.href,
      width: 4
    });
    textEl.setAttribute('position', '0 1.5 0');
    el.appendChild(textEl);

    // Set sphere rendered when camera is close to portal to allow user to peek inside.
    semiSphereEl.setAttribute('geometry', {
      primitive: 'sphere',
      radius: 1.0,
      phiStart: 0,
      segmentsWidth: 64,
      segmentsHeight: 64,
      phiLength: 180,
      thetaStart: 0,
      thetaLength: 360
    });
    semiSphereEl.setAttribute('material', {
      shader: 'portal',
      borderEnabled: 0.0,
      pano: this.data.image,
      side: 'back'
    });
    semiSphereEl.setAttribute('rotation', '0 180 0');
    semiSphereEl.setAttribute('position', '0 0 0');
    semiSphereEl.setAttribute('visible', false);
    el.appendChild(semiSphereEl);

    // Set sphere rendered when camera is close to portal to allow user to peek inside.
    sphereEl.setAttribute('geometry', {
      primitive: 'sphere',
      radius: 10,
      segmentsWidth: 64,
      segmentsHeight: 64
    });
    sphereEl.setAttribute('material', {
      shader: 'portal',
      borderEnabled: 0.0,
      pano: this.data.image,
      side: 'back'
    });
    sphereEl.setAttribute('visible', false);
    el.appendChild(sphereEl);

    this.visualAspectInitialized = true;
  },

  navigate: function () {
    window.location = this.data.href;
  },

  /**
   * 1. Swap plane that represents portal with sphere with a hole when the camera is close
   * so user can peek inside portal. Sphere is rendered on oposite side of portal
   * from where user enters.
   * 2. Place the url/title above or inside portal depending on distance to camera.
   * 3. Face portal to camera when far away from user.
   */
  tick: (function () {
    var cameraWorldPosition = new THREE.Vector3();
    var elWorldPosition = new THREE.Vector3();
    var quaternion = new THREE.Quaternion();
    var scale = new THREE.Vector3();

    return function () {
      var el = this.el;
      var object3D = el.object3D;
      var camera = el.sceneEl.camera;
      var cameraPortalOrientation;
      var distance;
      var textEl = this.textEl;

      if (!this.data.visualAspectEnabled) { return; }

      // Update matrices
      object3D.updateMatrixWorld();
      camera.parent.updateMatrixWorld();
      camera.updateMatrixWorld();

      object3D.matrix.decompose(elWorldPosition, quaternion, scale);
      elWorldPosition.setFromMatrixPosition(object3D.matrixWorld);
      cameraWorldPosition.setFromMatrixPosition(camera.matrixWorld);
      distance = elWorldPosition.distanceTo(cameraWorldPosition);

      if (distance > 20) {
        // Store original orientation to be restored when the portal stops facing the camera.
        if (!this.previousQuaternion) {
          this.quaternionClone.copy(quaternion);
          this.previousQuaternion = this.quaternionClone;
        }
        // If the portal is far away from the user, face portal to camera.
        object3D.lookAt(cameraWorldPosition);
      } else {
        // When portal is close to the user/camera.
        cameraPortalOrientation = this.calculateCameraPortalOrientation();
        // If user gets very close to portal, replace with holed sphere they can peek in.
        if (distance < 0.5) {
          // Configure text size and sphere orientation depending side user approaches portal.
          if (this.semiSphereEl.getAttribute('visible') === true) { return; }
          textEl.setAttribute('text', 'width', 1.5);
          if (cameraPortalOrientation <= 0.0) {
            textEl.setAttribute('position', '0 0 0.75');
            textEl.setAttribute('rotation', '0 180 0');
            this.semiSphereEl.setAttribute('rotation', '0 0 0');
          } else {
            textEl.setAttribute('position', '0 0 -0.75');
            textEl.setAttribute('rotation', '0 0 0');
            this.semiSphereEl.setAttribute('rotation', '0 180 0');
          }
          el.getObject3D('mesh').visible = false;
          this.semiSphereEl.setAttribute('visible', true);
          this.peekCameraPortalOrientation = cameraPortalOrientation;
        } else {
          // Calculate wich side the camera is approaching the camera (back / front).
          // Adjust text orientation based on camera position.
          if (cameraPortalOrientation <= 0.0) {
            textEl.setAttribute('rotation', '0 180 0');
          } else {
            textEl.setAttribute('rotation', '0 0 0');
          }
          textEl.setAttribute('text', 'width', 5);
          textEl.setAttribute('position', '0 1.5 0');
          el.getObject3D('mesh').visible = true;
          this.semiSphereEl.setAttribute('visible', false);
          this.peekCameraPortalOrientation = undefined;
        }
        if (this.previousQuaternion) {
          object3D.quaternion.copy(this.previousQuaternion);
          this.previousQuaternion = undefined;
        }
      }
    };
  })(),

  hideAll: function () {
    var el = this.el;
    var hiddenEls = this.hiddenEls;
    var self = this;
    if (hiddenEls.length > 0) { return; }
    el.sceneEl.object3D.traverse(function (object) {
      if (object && object.el && object.el.hasAttribute('link-controls')) { return; }
      if (!object.el || object === el.sceneEl.object3D || object.el === el ||
          object.el === self.sphereEl || object.el === el.sceneEl.cameraEl ||
          object.el.getAttribute('visible') === false || object.el === self.textEl ||
          object.el === self.semiSphereEl) {
        return;
      }
      object.el.setAttribute('visible', false);
      hiddenEls.push(object.el);
    });
  },

  showAll: function () {
    this.hiddenEls.forEach(function (el) { el.setAttribute('visible', true); });
    this.hiddenEls = [];
  },

  /**
   * Calculate whether the camera faces the front or back face of the portal.
   * @returns {number} > 0 if camera faces front of portal, < 0 if it faces back of portal.
   */
  calculateCameraPortalOrientation: (function () {
    var mat4 = new THREE.Matrix4();
    var cameraPosition = new THREE.Vector3();
    var portalNormal = new THREE.Vector3(0, 0, 1);
    var portalPosition = new THREE.Vector3(0, 0, 0);

    return function () {
      var el = this.el;
      var camera = el.sceneEl.camera;

      // Reset tmp variables.
      cameraPosition.set(0, 0, 0);
      portalNormal.set(0, 0, 1);
      portalPosition.set(0, 0, 0);

      // Apply portal orientation to the normal.
      el.object3D.matrixWorld.extractRotation(mat4);
      portalNormal.applyMatrix4(mat4);

      // Calculate portal world position.
      el.object3D.updateMatrixWorld();
      el.object3D.localToWorld(portalPosition);

      // Calculate camera world position.
      camera.parent.parent.updateMatrixWorld();
      camera.parent.updateMatrixWorld();
      camera.updateMatrixWorld();
      camera.localToWorld(cameraPosition);

      // Calculate vector from portal to camera.
      // (portal) -------> (camera)
      cameraPosition.sub(portalPosition).normalize();
      portalNormal.normalize();

      // Side where camera approaches portal is given by sign of dot product of portal normal
      // and portal to camera vectors.
      return Math.sign(portalNormal.dot(cameraPosition));
    };
  })(),

  remove: function () {
    this.removeEventListener();
  }
});

/* eslint-disable */
registerShader('portal', {
  schema: {
    borderEnabled: {default: 1.0, type: 'int', is: 'uniform'},
    backgroundColor: {default: 'red', type: 'color', is: 'uniform'},
    pano: {type: 'map', is: 'uniform'},
    strokeColor: {default: 'white', type: 'color', is: 'uniform'}
  },

  vertexShader: [
    'vec3 portalPosition;',
    'varying vec3 vWorldPosition;',
    'varying float vDistanceToCenter;',
    'varying float vDistance;',
    'void main() {',
    'vDistanceToCenter = clamp(length(position - vec3(0.0, 0.0, 0.0)), 0.0, 1.0);',
    'portalPosition = (modelMatrix * vec4(0.0, 0.0, 0.0, 1.0)).xyz;',
    'vDistance = length(portalPosition - cameraPosition);',
    'vWorldPosition = (modelMatrix * vec4(position, 1.0)).xyz;',
    'gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);',
    '}'
  ].join('\n'),

  fragmentShader: [
    '#define RECIPROCAL_PI2 0.15915494',
    'uniform sampler2D pano;',
    'uniform vec3 strokeColor;',
    'uniform vec3 backgroundColor;',
    'uniform float borderEnabled;',
    'varying float vDistanceToCenter;',
    'varying float vDistance;',
    'varying vec3 vWorldPosition;',
    'void main() {',
    'vec3 direction = normalize(vWorldPosition - cameraPosition);',
    'vec2 sampleUV;',
    'float borderThickness = clamp(exp(-vDistance / 50.0), 0.6, 0.95);',
    'sampleUV.y = clamp(direction.y * 0.5  + 0.5, 0.0, 1.0);',
    'sampleUV.x = atan(direction.z, -direction.x) * -RECIPROCAL_PI2 + 0.5;',
    'if (vDistanceToCenter > borderThickness && borderEnabled == 1.0) {',
    'gl_FragColor = vec4(strokeColor, 1.0);',
    '} else {',
    'gl_FragColor = mix(texture2D(pano, sampleUV), vec4(backgroundColor, 1.0), clamp(pow((vDistance / 15.0), 2.0), 0.0, 1.0));',
    '}',
    '}'
  ].join('\n')
});
/* eslint-enable */

},{"../core/component":113,"../core/shader":123,"../lib/three":161}],72:[function(_dereq_,module,exports){
/* global DeviceOrientationEvent  */
var registerComponent = _dereq_('../core/component').registerComponent;
var THREE = _dereq_('../lib/three');
var utils = _dereq_('../utils/');
var bind = utils.bind;

// To avoid recalculation at every mouse movement tick
var PI_2 = Math.PI / 2;

/**
 * look-controls. Update entity pose, factoring mouse, touch, and WebVR API data.
 */
module.exports.Component = registerComponent('look-controls', {
  dependencies: ['position', 'rotation'],

  schema: {
    enabled: {default: true},
    magicWindowTrackingEnabled: {default: true},
    pointerLockEnabled: {default: false},
    reverseMouseDrag: {default: false},
    reverseTouchDrag: {default: false},
    touchEnabled: {default: true},
    mouseEnabled: {default: true}
  },

  init: function () {
    this.deltaYaw = 0;
    this.previousHMDPosition = new THREE.Vector3();
    this.hmdQuaternion = new THREE.Quaternion();
    this.magicWindowAbsoluteEuler = new THREE.Euler();
    this.magicWindowDeltaEuler = new THREE.Euler();
    this.position = new THREE.Vector3();
    this.magicWindowObject = new THREE.Object3D();
    this.rotation = {};
    this.deltaRotation = {};
    this.savedPose = null;
    this.pointerLocked = false;
    this.setupMouseControls();
    this.bindMethods();
    this.previousMouseEvent = {};

    this.setupMagicWindowControls();

    // To save / restore camera pose
    this.savedPose = {
      position: new THREE.Vector3(),
      rotation: new THREE.Euler()
    };

    // Call enter VR handler if the scene has entered VR before the event listeners attached.
    if (this.el.sceneEl.is('vr-mode')) { this.onEnterVR(); }
  },

  setupMagicWindowControls: function () {
    var magicWindowControls;
    var data = this.data;

    // Only on mobile devices and only enabled if DeviceOrientation permission has been granted.
    if (utils.device.isMobile()) {
      magicWindowControls = this.magicWindowControls = new THREE.DeviceOrientationControls(this.magicWindowObject);
      if (typeof DeviceOrientationEvent !== 'undefined' && DeviceOrientationEvent.requestPermission) {
        magicWindowControls.enabled = false;
        if (this.el.sceneEl.components['device-orientation-permission-ui'].permissionGranted) {
          magicWindowControls.enabled = data.magicWindowTrackingEnabled;
        } else {
          this.el.sceneEl.addEventListener('deviceorientationpermissiongranted', function () {
            magicWindowControls.enabled = data.magicWindowTrackingEnabled;
          });
        }
      }
    }
  },

  update: function (oldData) {
    var data = this.data;

    // Disable grab cursor classes if no longer enabled.
    if (data.enabled !== oldData.enabled) {
      this.updateGrabCursor(data.enabled);
    }

    // Reset magic window eulers if tracking is disabled.
    if (oldData && !data.magicWindowTrackingEnabled && oldData.magicWindowTrackingEnabled) {
      this.magicWindowAbsoluteEuler.set(0, 0, 0);
      this.magicWindowDeltaEuler.set(0, 0, 0);
    }

    // Pass on magic window tracking setting to magicWindowControls.
    if (this.magicWindowControls) {
      this.magicWindowControls.enabled = data.magicWindowTrackingEnabled;
    }

    if (oldData && !data.pointerLockEnabled !== oldData.pointerLockEnabled) {
      this.removeEventListeners();
      this.addEventListeners();
      if (this.pointerLocked) { this.exitPointerLock(); }
    }
  },

  tick: function (t) {
    var data = this.data;
    if (!data.enabled) { return; }
    this.updateOrientation();
  },

  play: function () {
    this.addEventListeners();
  },

  pause: function () {
    this.removeEventListeners();
    if (this.pointerLocked) { this.exitPointerLock(); }
  },

  remove: function () {
    this.removeEventListeners();
    if (this.pointerLocked) { this.exitPointerLock(); }
  },

  bindMethods: function () {
    this.onMouseDown = bind(this.onMouseDown, this);
    this.onMouseMove = bind(this.onMouseMove, this);
    this.onMouseUp = bind(this.onMouseUp, this);
    this.onTouchStart = bind(this.onTouchStart, this);
    this.onTouchMove = bind(this.onTouchMove, this);
    this.onTouchEnd = bind(this.onTouchEnd, this);
    this.onEnterVR = bind(this.onEnterVR, this);
    this.onExitVR = bind(this.onExitVR, this);
    this.onPointerLockChange = bind(this.onPointerLockChange, this);
    this.onPointerLockError = bind(this.onPointerLockError, this);
  },

 /**
  * Set up states and Object3Ds needed to store rotation data.
  */
  setupMouseControls: function () {
    this.mouseDown = false;
    this.pitchObject = new THREE.Object3D();
    this.yawObject = new THREE.Object3D();
    this.yawObject.position.y = 10;
    this.yawObject.add(this.pitchObject);
  },

  /**
   * Add mouse and touch event listeners to canvas.
   */
  addEventListeners: function () {
    var sceneEl = this.el.sceneEl;
    var canvasEl = sceneEl.canvas;

    // Wait for canvas to load.
    if (!canvasEl) {
      sceneEl.addEventListener('render-target-loaded', bind(this.addEventListeners, this));
      return;
    }

    // Mouse events.
    canvasEl.addEventListener('mousedown', this.onMouseDown, false);
    window.addEventListener('mousemove', this.onMouseMove, false);
    window.addEventListener('mouseup', this.onMouseUp, false);

    // Touch events.
    canvasEl.addEventListener('touchstart', this.onTouchStart);
    window.addEventListener('touchmove', this.onTouchMove);
    window.addEventListener('touchend', this.onTouchEnd);

    // sceneEl events.
    sceneEl.addEventListener('enter-vr', this.onEnterVR);
    sceneEl.addEventListener('exit-vr', this.onExitVR);

    // Pointer Lock events.
    if (this.data.pointerLockEnabled) {
      document.addEventListener('pointerlockchange', this.onPointerLockChange, false);
      document.addEventListener('mozpointerlockchange', this.onPointerLockChange, false);
      document.addEventListener('pointerlockerror', this.onPointerLockError, false);
    }
  },

  /**
   * Remove mouse and touch event listeners from canvas.
   */
  removeEventListeners: function () {
    var sceneEl = this.el.sceneEl;
    var canvasEl = sceneEl && sceneEl.canvas;

    if (!canvasEl) { return; }

    // Mouse events.
    canvasEl.removeEventListener('mousedown', this.onMouseDown);
    window.removeEventListener('mousemove', this.onMouseMove);
    window.removeEventListener('mouseup', this.onMouseUp);

    // Touch events.
    canvasEl.removeEventListener('touchstart', this.onTouchStart);
    window.removeEventListener('touchmove', this.onTouchMove);
    window.removeEventListener('touchend', this.onTouchEnd);

    // sceneEl events.
    sceneEl.removeEventListener('enter-vr', this.onEnterVR);
    sceneEl.removeEventListener('exit-vr', this.onExitVR);

    // Pointer Lock events.
    document.removeEventListener('pointerlockchange', this.onPointerLockChange, false);
    document.removeEventListener('mozpointerlockchange', this.onPointerLockChange, false);
    document.removeEventListener('pointerlockerror', this.onPointerLockError, false);
  },

  /**
   * Update orientation for mobile, mouse drag, and headset.
   * Mouse-drag only enabled if HMD is not active.
   */
  updateOrientation: (function () {
    var poseMatrix = new THREE.Matrix4();

    return function () {
      var object3D = this.el.object3D;
      var pitchObject = this.pitchObject;
      var yawObject = this.yawObject;
      var pose;
      var sceneEl = this.el.sceneEl;

      // In VR mode, THREE is in charge of updating the camera pose.
      if (sceneEl.is('vr-mode') && sceneEl.checkHeadsetConnected()) {
        // With WebXR THREE applies headset pose to the object3D matrixWorld internally.
        // Reflect values back on position, rotation, scale for getAttribute to return the expected values.
        if (sceneEl.hasWebXR) {
          pose = sceneEl.renderer.xr.getCameraPose();
          if (pose) {
            poseMatrix.elements = pose.transform.matrix;
            poseMatrix.decompose(object3D.position, object3D.rotation, object3D.scale);
          }
        }
        return;
      }

      this.updateMagicWindowOrientation();

      // On mobile, do camera rotation with touch events and sensors.
      object3D.rotation.x = this.magicWindowDeltaEuler.x + pitchObject.rotation.x;
      object3D.rotation.y = this.magicWindowDeltaEuler.y + yawObject.rotation.y;
      object3D.rotation.z = this.magicWindowDeltaEuler.z;
    };
  })(),

  updateMagicWindowOrientation: function () {
    var magicWindowAbsoluteEuler = this.magicWindowAbsoluteEuler;
    var magicWindowDeltaEuler = this.magicWindowDeltaEuler;
    // Calculate magic window HMD quaternion.
    if (this.magicWindowControls && this.magicWindowControls.enabled) {
      this.magicWindowControls.update();
      magicWindowAbsoluteEuler.setFromQuaternion(this.magicWindowObject.quaternion, 'YXZ');
      if (!this.previousMagicWindowYaw && magicWindowAbsoluteEuler.y !== 0) {
        this.previousMagicWindowYaw = magicWindowAbsoluteEuler.y;
      }
      if (this.previousMagicWindowYaw) {
        magicWindowDeltaEuler.x = magicWindowAbsoluteEuler.x;
        magicWindowDeltaEuler.y += magicWindowAbsoluteEuler.y - this.previousMagicWindowYaw;
        magicWindowDeltaEuler.z = magicWindowAbsoluteEuler.z;
        this.previousMagicWindowYaw = magicWindowAbsoluteEuler.y;
      }
    }
  },

  /**
   * Translate mouse drag into rotation.
   *
   * Dragging up and down rotates the camera around the X-axis (yaw).
   * Dragging left and right rotates the camera around the Y-axis (pitch).
   */
  onMouseMove: function (evt) {
    var direction;
    var movementX;
    var movementY;
    var pitchObject = this.pitchObject;
    var previousMouseEvent = this.previousMouseEvent;
    var yawObject = this.yawObject;

    // Not dragging or not enabled.
    if (!this.data.enabled || (!this.mouseDown && !this.pointerLocked)) { return; }

    // Calculate delta.
    if (this.pointerLocked) {
      movementX = evt.movementX || evt.mozMovementX || 0;
      movementY = evt.movementY || evt.mozMovementY || 0;
    } else {
      movementX = evt.screenX - previousMouseEvent.screenX;
      movementY = evt.screenY - previousMouseEvent.screenY;
    }
    this.previousMouseEvent.screenX = evt.screenX;
    this.previousMouseEvent.screenY = evt.screenY;

    // Calculate rotation.
    direction = this.data.reverseMouseDrag ? 1 : -1;
    yawObject.rotation.y += movementX * 0.002 * direction;
    pitchObject.rotation.x += movementY * 0.002 * direction;
    pitchObject.rotation.x = Math.max(-PI_2, Math.min(PI_2, pitchObject.rotation.x));
  },

  /**
   * Register mouse down to detect mouse drag.
   */
  onMouseDown: function (evt) {
    var sceneEl = this.el.sceneEl;
    if (!this.data.enabled || !this.data.mouseEnabled || (sceneEl.is('vr-mode') && sceneEl.checkHeadsetConnected())) { return; }
    // Handle only primary button.
    if (evt.button !== 0) { return; }

    var canvasEl = sceneEl && sceneEl.canvas;

    this.mouseDown = true;
    this.previousMouseEvent.screenX = evt.screenX;
    this.previousMouseEvent.screenY = evt.screenY;
    this.showGrabbingCursor();

    if (this.data.pointerLockEnabled && !this.pointerLocked) {
      if (canvasEl.requestPointerLock) {
        canvasEl.requestPointerLock();
      } else if (canvasEl.mozRequestPointerLock) {
        canvasEl.mozRequestPointerLock();
      }
    }
  },

  /**
   * Shows grabbing cursor on scene
   */
  showGrabbingCursor: function () {
    this.el.sceneEl.canvas.style.cursor = 'grabbing';
  },

  /**
   * Hides grabbing cursor on scene
   */
  hideGrabbingCursor: function () {
    this.el.sceneEl.canvas.style.cursor = '';
  },

  /**
   * Register mouse up to detect release of mouse drag.
   */
  onMouseUp: function () {
    this.mouseDown = false;
    this.hideGrabbingCursor();
  },

  /**
   * Register touch down to detect touch drag.
   */
  onTouchStart: function (evt) {
    if (evt.touches.length !== 1 ||
        !this.data.touchEnabled ||
        this.el.sceneEl.is('vr-mode')) { return; }
    this.touchStart = {
      x: evt.touches[0].pageX,
      y: evt.touches[0].pageY
    };
    this.touchStarted = true;
  },

  /**
   * Translate touch move to Y-axis rotation.
   */
  onTouchMove: function (evt) {
    var direction;
    var canvas = this.el.sceneEl.canvas;
    var deltaY;
    var yawObject = this.yawObject;

    if (!this.touchStarted || !this.data.touchEnabled) { return; }

    deltaY = 2 * Math.PI * (evt.touches[0].pageX - this.touchStart.x) / canvas.clientWidth;

    direction = this.data.reverseTouchDrag ? 1 : -1;
    // Limit touch orientaion to to yaw (y axis).
    yawObject.rotation.y -= deltaY * 0.5 * direction;
    this.touchStart = {
      x: evt.touches[0].pageX,
      y: evt.touches[0].pageY
    };
  },

  /**
   * Register touch end to detect release of touch drag.
   */
  onTouchEnd: function () {
    this.touchStarted = false;
  },

  /**
   * Save pose.
   */
  onEnterVR: function () {
    var sceneEl = this.el.sceneEl;
    if (!sceneEl.checkHeadsetConnected()) { return; }
    this.saveCameraPose();
    this.el.object3D.position.set(0, 0, 0);
    this.el.object3D.rotation.set(0, 0, 0);
    if (sceneEl.hasWebXR) {
      this.el.object3D.matrixAutoUpdate = false;
      this.el.object3D.updateMatrix();
    }
  },

  /**
   * Restore the pose.
   */
  onExitVR: function () {
    if (!this.el.sceneEl.checkHeadsetConnected()) { return; }
    this.restoreCameraPose();
    this.previousHMDPosition.set(0, 0, 0);
    this.el.object3D.matrixAutoUpdate = true;
  },

  /**
   * Update Pointer Lock state.
   */
  onPointerLockChange: function () {
    this.pointerLocked = !!(document.pointerLockElement || document.mozPointerLockElement);
  },

  /**
   * Recover from Pointer Lock error.
   */
  onPointerLockError: function () {
    this.pointerLocked = false;
  },

  // Exits pointer-locked mode.
  exitPointerLock: function () {
    document.exitPointerLock();
    this.pointerLocked = false;
  },

  /**
   * Toggle the feature of showing/hiding the grab cursor.
   */
  updateGrabCursor: function (enabled) {
    var sceneEl = this.el.sceneEl;

    function enableGrabCursor () { sceneEl.canvas.classList.add('a-grab-cursor'); }
    function disableGrabCursor () { sceneEl.canvas.classList.remove('a-grab-cursor'); }

    if (!sceneEl.canvas) {
      if (enabled) {
        sceneEl.addEventListener('render-target-loaded', enableGrabCursor);
      } else {
        sceneEl.addEventListener('render-target-loaded', disableGrabCursor);
      }
      return;
    }

    if (enabled) {
      enableGrabCursor();
      return;
    }
    disableGrabCursor();
  },

  /**
   * Save camera pose before entering VR to restore later if exiting.
   */
  saveCameraPose: function () {
    var el = this.el;

    this.savedPose.position.copy(el.object3D.position);
    this.savedPose.rotation.copy(el.object3D.rotation);
    this.hasSavedPose = true;
  },

  /**
   * Reset camera pose to before entering VR.
   */
  restoreCameraPose: function () {
    var el = this.el;
    var savedPose = this.savedPose;

    if (!this.hasSavedPose) { return; }

    // Reset camera orientation.
    el.object3D.position.copy(savedPose.position);
    el.object3D.rotation.copy(savedPose.rotation);
    this.hasSavedPose = false;
  }
});

},{"../core/component":113,"../lib/three":161,"../utils/":187}],73:[function(_dereq_,module,exports){
var bind = _dereq_('../utils/bind');
var registerComponent = _dereq_('../core/component').registerComponent;

var trackedControlsUtils = _dereq_('../utils/tracked-controls');
var checkControllerPresentAndSetup = trackedControlsUtils.checkControllerPresentAndSetup;
var emitIfAxesChanged = trackedControlsUtils.emitIfAxesChanged;
var onButtonEvent = trackedControlsUtils.onButtonEvent;

// See Profiles Registry:
// https://github.com/immersive-web/webxr-input-profiles/tree/master/packages/registry
// TODO: Add a more robust system for deriving gamepad name.
var GAMEPAD_ID_PREFIX = 'magicleap';
var GAMEPAD_ID_SUFFIX = '-one';
var GAMEPAD_ID_COMPOSITE = GAMEPAD_ID_PREFIX + GAMEPAD_ID_SUFFIX;

var MAGICLEAP_CONTROLLER_MODEL_GLB_URL = 'https://cdn.aframe.io/controllers/magicleap/magicleap-one-controller.glb';

/**
 * Button IDs:
 * 0 - trigger
 * 1 - grip
 * 2 - touchpad
 * 3 - menu (never dispatched on this layer)
 *
 * Axis:
 * 0 - touchpad x axis
 * 1 - touchpad y axis
 */
var INPUT_MAPPING_WEBXR = {
  axes: {touchpad: [0, 1]},
  buttons: ['trigger', 'grip', 'touchpad', 'menu']
};

/**
 * Magic Leap Controls
 * Interface with Magic Leap control and map Gamepad events to controller
 * buttons: trigger, grip, touchpad, and menu.
 * Load a controller model.
 */
module.exports.Component = registerComponent('magicleap-controls', {
  schema: {
    hand: {default: 'none'},
    model: {default: true},
    orientationOffset: {type: 'vec3'}
  },

  mapping: INPUT_MAPPING_WEBXR,

  init: function () {
    var self = this;
    this.controllerPresent = false;
    this.lastControllerCheck = 0;
    this.onButtonChanged = bind(this.onButtonChanged, this);
    this.onButtonDown = function (evt) { onButtonEvent(evt.detail.id, 'down', self); };
    this.onButtonUp = function (evt) { onButtonEvent(evt.detail.id, 'up', self); };
    this.onButtonTouchEnd = function (evt) { onButtonEvent(evt.detail.id, 'touchend', self); };
    this.onButtonTouchStart = function (evt) { onButtonEvent(evt.detail.id, 'touchstart', self); };
    this.previousButtonValues = {};
    this.rendererSystem = this.el.sceneEl.systems.renderer;

    this.bindMethods();
  },

  update: function () {
    var data = this.data;
    this.controllerIndex = data.hand === 'right' ? 0 : data.hand === 'left' ? 1 : 2;
  },

  play: function () {
    this.checkIfControllerPresent();
    this.addControllersUpdateListener();
  },

  pause: function () {
    this.removeEventListeners();
    this.removeControllersUpdateListener();
  },

  bindMethods: function () {
    this.onModelLoaded = bind(this.onModelLoaded, this);
    this.onControllersUpdate = bind(this.onControllersUpdate, this);
    this.checkIfControllerPresent = bind(this.checkIfControllerPresent, this);
    this.removeControllersUpdateListener = bind(this.removeControllersUpdateListener, this);
    this.onAxisMoved = bind(this.onAxisMoved, this);
  },

  addEventListeners: function () {
    var el = this.el;
    el.addEventListener('buttonchanged', this.onButtonChanged);
    el.addEventListener('buttondown', this.onButtonDown);
    el.addEventListener('buttonup', this.onButtonUp);
    el.addEventListener('touchstart', this.onButtonTouchStart);
    el.addEventListener('touchend', this.onButtonTouchEnd);
    el.addEventListener('axismove', this.onAxisMoved);
    el.addEventListener('model-loaded', this.onModelLoaded);
    this.controllerEventsActive = true;
  },

  removeEventListeners: function () {
    var el = this.el;
    el.removeEventListener('buttonchanged', this.onButtonChanged);
    el.removeEventListener('buttondown', this.onButtonDown);
    el.removeEventListener('buttonup', this.onButtonUp);
    el.removeEventListener('touchstart', this.onButtonTouchStart);
    el.removeEventListener('touchend', this.onButtonTouchEnd);
    el.removeEventListener('axismove', this.onAxisMoved);
    el.removeEventListener('model-loaded', this.onModelLoaded);
    this.controllerEventsActive = false;
  },

  checkIfControllerPresent: function () {
    var data = this.data;
    checkControllerPresentAndSetup(this, GAMEPAD_ID_COMPOSITE,
                                   {index: this.controllerIndex, hand: data.hand});
  },

  injectTrackedControls: function () {
    var el = this.el;
    var data = this.data;

    el.setAttribute('tracked-controls', {
      // TODO: verify expected behavior between reserved prefixes.
      idPrefix: GAMEPAD_ID_COMPOSITE,
      hand: data.hand,
      controller: this.controllerIndex,
      orientationOffset: data.orientationOffset
    });

    // Load model.
    if (!this.data.model) { return; }
    this.el.setAttribute('gltf-model', MAGICLEAP_CONTROLLER_MODEL_GLB_URL);
  },

  addControllersUpdateListener: function () {
    this.el.sceneEl.addEventListener('controllersupdated', this.onControllersUpdate, false);
  },

  removeControllersUpdateListener: function () {
    this.el.sceneEl.removeEventListener('controllersupdated', this.onControllersUpdate, false);
  },

  onControllersUpdate: function () {
    // Note that due to gamepadconnected event propagation issues, we don't rely on events.
    this.checkIfControllerPresent();
  },

  /**
   * Rotate the trigger button based on how hard the trigger is pressed.
   */
  onButtonChanged: function (evt) {
    var button = this.mapping.buttons[evt.detail.id];
    var analogValue;

    if (!button) { return; }
    if (button === 'trigger') {
      analogValue = evt.detail.state.value;
      console.log('analog value of trigger press: ' + analogValue);
    }

    // Pass along changed event with button state, using button mapping for convenience.
    this.el.emit(button + 'changed', evt.detail.state);
  },

  onModelLoaded: function (evt) {
    var controllerObject3D = evt.detail.model;
    // our glb scale is too large.
    controllerObject3D.scale.set(0.01, 0.01, 0.01);
  },

  onAxisMoved: function (evt) {
    emitIfAxesChanged(this, this.mapping.axes, evt);
  },

  updateModel: function (buttonName, evtName) {},

  setButtonColor: function (buttonName, color) {}

});

},{"../core/component":113,"../utils/bind":181,"../utils/tracked-controls":196}],74:[function(_dereq_,module,exports){
/* global Promise */
var utils = _dereq_('../utils/');
var component = _dereq_('../core/component');
var THREE = _dereq_('../lib/three');
var shader = _dereq_('../core/shader');

var error = utils.debug('components:material:error');
var registerComponent = component.registerComponent;
var shaders = shader.shaders;
var shaderNames = shader.shaderNames;

/**
 * Material component.
 *
 * @member {object} shader - Determines how material is shaded. Defaults to `standard`,
 *         three.js's implementation of PBR. Another standard shading model is `flat` which
 *         uses MeshBasicMaterial.
 */
module.exports.Component = registerComponent('material', {
  schema: {
    alphaTest: {default: 0.0, min: 0.0, max: 1.0},
    depthTest: {default: true},
    depthWrite: {default: true},
    flatShading: {default: false},
    npot: {default: false},
    offset: {type: 'vec2', default: {x: 0, y: 0}},
    opacity: {default: 1.0, min: 0.0, max: 1.0},
    repeat: {type: 'vec2', default: {x: 1, y: 1}},
    shader: {default: 'standard', oneOf: shaderNames, schemaChange: true},
    side: {default: 'front', oneOf: ['front', 'back', 'double']},
    transparent: {default: false},
    vertexColors: {type: 'string', default: 'none', oneOf: ['face', 'vertex']},
    visible: {default: true},
    blending: {default: 'normal', oneOf: ['none', 'normal', 'additive', 'subtractive', 'multiply']},
    dithering: {default: true}
  },

  init: function () {
    this.material = null;
  },

  /**
   * Update or create material.
   *
   * @param {object|null} oldData
   */
  update: function (oldData) {
    var data = this.data;
    if (!this.shader || data.shader !== oldData.shader) {
      this.updateShader(data.shader);
    }
    this.shader.update(this.data);
    this.updateMaterial(oldData);
  },

  updateSchema: function (data) {
    var currentShader;
    var newShader;
    var schema;
    var shader;

    newShader = data && data.shader;
    currentShader = this.oldData && this.oldData.shader;
    shader = newShader || currentShader;
    schema = shaders[shader] && shaders[shader].schema;

    if (!schema) { error('Unknown shader schema ' + shader); }
    if (currentShader && newShader === currentShader) { return; }
    this.extendSchema(schema);
    this.updateBehavior();
  },

  updateBehavior: function () {
    var key;
    var sceneEl = this.el.sceneEl;
    var schema = this.schema;
    var self = this;
    var tickProperties;

    function tickTime (time, delta) {
      var key;
      for (key in tickProperties) {
        tickProperties[key] = time;
      }
      self.shader.update(tickProperties);
    }

    this.tick = undefined;

    tickProperties = {};
    for (key in schema) {
      if (schema[key].type === 'time') {
        this.tick = tickTime;
        tickProperties[key] = true;
      }
    }

    if (!sceneEl) { return; }
    if (this.tick) {
      sceneEl.addBehavior(this);
    } else {
      sceneEl.removeBehavior(this);
    }
  },

  updateShader: function (shaderName) {
    var data = this.data;
    var Shader = shaders[shaderName] && shaders[shaderName].Shader;
    var shaderInstance;

    if (!Shader) { throw new Error('Unknown shader ' + shaderName); }

    // Get material from A-Frame shader.
    shaderInstance = this.shader = new Shader();
    shaderInstance.el = this.el;
    shaderInstance.init(data);
    this.setMaterial(shaderInstance.material);
    this.updateSchema(data);
  },

  /**
   * Set and update base material properties.
   * Set `needsUpdate` when needed.
   */
  updateMaterial: function (oldData) {
    var data = this.data;
    var material = this.material;
    var oldDataHasKeys;

    // Base material properties.
    material.alphaTest = data.alphaTest;
    material.depthTest = data.depthTest !== false;
    material.depthWrite = data.depthWrite !== false;
    material.opacity = data.opacity;
    material.flatShading = data.flatShading;
    material.side = parseSide(data.side);
    material.transparent = data.transparent !== false || data.opacity < 1.0;
    material.vertexColors = parseVertexColors(data.vertexColors);
    material.visible = data.visible;
    material.blending = parseBlending(data.blending);
    material.dithering = data.dithering;

    // Check if material needs update.
    for (oldDataHasKeys in oldData) { break; }
    if (oldDataHasKeys &&
        (oldData.alphaTest !== data.alphaTest ||
         oldData.side !== data.side ||
         oldData.vertexColors !== data.vertexColors)) {
      material.needsUpdate = true;
    }
  },

  /**
   * Remove material on remove (callback).
   * Dispose of it from memory and unsubscribe from scene updates.
   */
  remove: function () {
    var defaultMaterial = new THREE.MeshBasicMaterial();
    var material = this.material;
    var object3D = this.el.getObject3D('mesh');
    if (object3D) { object3D.material = defaultMaterial; }
    disposeMaterial(material, this.system);
  },

  /**
   * (Re)create new material. Has side-effects of setting `this.material` and updating
   * material registration in scene.
   *
   * @param {object} data - Material component data.
   * @param {object} type - Material type to create.
   * @returns {object} Material.
   */
  setMaterial: function (material) {
    var el = this.el;
    var mesh;
    var system = this.system;

    if (this.material) { disposeMaterial(this.material, system); }

    this.material = material;
    system.registerMaterial(material);

    // Set on mesh. If mesh does not exist, wait for it.
    mesh = el.getObject3D('mesh');
    if (mesh) {
      mesh.material = material;
    } else {
      el.addEventListener('object3dset', function waitForMesh (evt) {
        if (evt.detail.type !== 'mesh' || evt.target !== el) { return; }
        el.getObject3D('mesh').material = material;
        el.removeEventListener('object3dset', waitForMesh);
      });
    }
  }
});

/**
 * Return a three.js constant determining which material face sides to render
 * based on the side parameter (passed as a component property).
 *
 * @param {string} [side=front] - `front`, `back`, or `double`.
 * @returns {number} THREE.FrontSide, THREE.BackSide, or THREE.DoubleSide.
 */
function parseSide (side) {
  switch (side) {
    case 'back': {
      return THREE.BackSide;
    }
    case 'double': {
      return THREE.DoubleSide;
    }
    default: {
      // Including case `front`.
      return THREE.FrontSide;
    }
  }
}

/**
 * Return a three.js constant determining vertex coloring.
 */
function parseVertexColors (coloring) {
  switch (coloring) {
    case 'face': {
      return THREE.FaceColors;
    }
    case 'vertex': {
      return THREE.VertexColors;
    }
    default: {
      return THREE.NoColors;
    }
  }
}

/**
 * Return a three.js constant determining blending
 *
 * @param {string} [blending=normal]
 * - `none`, additive`, `subtractive`,`multiply` or `normal`.
 * @returns {number}
 */
function parseBlending (blending) {
  switch (blending) {
    case 'none': {
      return THREE.NoBlending;
    }
    case 'additive': {
      return THREE.AdditiveBlending;
    }
    case 'subtractive': {
      return THREE.SubtractiveBlending;
    }
    case 'multiply': {
      return THREE.MultiplyBlending;
    }
    default: {
      return THREE.NormalBlending;
    }
  }
}

/**
 * Dispose of material from memory and unsubscribe material from scene updates like fog.
 */
function disposeMaterial (material, system) {
  material.dispose();
  system.unregisterMaterial(material);
}

},{"../core/component":113,"../core/shader":123,"../lib/three":161,"../utils/":187}],75:[function(_dereq_,module,exports){
var debug = _dereq_('../utils/debug');
var registerComponent = _dereq_('../core/component').registerComponent;
var THREE = _dereq_('../lib/three');

var warn = debug('components:obj-model:warn');

module.exports.Component = registerComponent('obj-model', {
  schema: {
    mtl: {type: 'model'},
    obj: {type: 'model'}
  },

  init: function () {
    var self = this;

    this.model = null;
    this.objLoader = new THREE.OBJLoader();
    this.mtlLoader = new THREE.MTLLoader(this.objLoader.manager);
    // Allow cross-origin images to be loaded.
    this.mtlLoader.crossOrigin = '';

    this.el.addEventListener('componentinitialized', function (evt) {
      if (!self.model) { return; }
      if (evt.detail.name !== 'material') { return; }
      self.applyMaterial();
    });
  },

  update: function () {
    var data = this.data;
    if (!data.obj) { return; }
    this.resetMesh();
    this.loadObj(data.obj, data.mtl);
  },

  remove: function () {
    if (!this.model) { return; }
    this.resetMesh();
  },

  resetMesh: function () {
    this.el.removeObject3D('mesh');
  },

  loadObj: function (objUrl, mtlUrl) {
    var self = this;
    var el = this.el;
    var mtlLoader = this.mtlLoader;
    var objLoader = this.objLoader;
    var rendererSystem = this.el.sceneEl.systems.renderer;
    var BASE_PATH = mtlUrl.substr(0, mtlUrl.lastIndexOf('/') + 1);

    if (mtlUrl) {
      // .OBJ with an .MTL.
      if (el.hasAttribute('material')) {
        warn('Material component properties are ignored when a .MTL is provided');
      }
      mtlLoader.setResourcePath(BASE_PATH);
      mtlLoader.load(mtlUrl, function (materials) {
        materials.preload();
        objLoader.setMaterials(materials);
        objLoader.load(objUrl, function (objModel) {
          self.model = objModel;
          self.model.traverse(function (object) {
            if (object.isMesh) {
              var material = object.material;
              if (material.color) rendererSystem.applyColorCorrection(material.color);
              if (material.map) rendererSystem.applyColorCorrection(material.map);
              if (material.emissive) rendererSystem.applyColorCorrection(material.emissive);
              if (material.emissiveMap) rendererSystem.applyColorCorrection(material.emissiveMap);
            }
          });
          el.setObject3D('mesh', objModel);
          el.emit('model-loaded', {format: 'obj', model: objModel});
        });
      });
      return;
    }

    // .OBJ only.
    objLoader.load(objUrl, function loadObjOnly (objModel) {
      self.model = objModel;
      self.applyMaterial();
      el.setObject3D('mesh', objModel);
      el.emit('model-loaded', {format: 'obj', model: objModel});
    });
  },

  /**
   * Apply material from material component recursively.
   */
  applyMaterial: function () {
    var material = this.el.components.material;
    if (!material) { return; }
    this.model.traverse(function (child) {
      if (child instanceof THREE.Mesh) {
        child.material = material.material;
      }
    });
  }
});

},{"../core/component":113,"../lib/three":161,"../utils/debug":183}],76:[function(_dereq_,module,exports){
var registerComponent = _dereq_('../core/component').registerComponent;
var bind = _dereq_('../utils/bind');

var trackedControlsUtils = _dereq_('../utils/tracked-controls');
var checkControllerPresentAndSetup = trackedControlsUtils.checkControllerPresentAndSetup;
var emitIfAxesChanged = trackedControlsUtils.emitIfAxesChanged;
var onButtonEvent = trackedControlsUtils.onButtonEvent;
var isWebXRAvailable = _dereq_('../utils/').device.isWebXRAvailable;

var GAMEPAD_ID_WEBXR = 'oculus-go';
var GAMEPAD_ID_WEBVR = 'Oculus Go';

var OCULUS_GO_CONTROLLER_MODEL_URL = 'https://cdn.aframe.io/controllers/oculus/go/oculus-go-controller.gltf';

// Prefix for Gen1 and Gen2 Oculus Touch Controllers.
var GAMEPAD_ID_PREFIX = isWebXRAvailable ? GAMEPAD_ID_WEBXR : GAMEPAD_ID_WEBVR;

/**
 * Button indices:
 * 0 - trackpad
 * 1 - trigger
 *
 * Axis:
 * 0 - trackpad x
 * 1 - trackpad y
 */
var INPUT_MAPPING_WEBVR = {
  axes: {trackpad: [0, 1]},
  buttons: ['trackpad', 'trigger']
};

/**
 * Button indices:
 * 0 - trigger
 * 1 - none
 * 2 - touchpad
 *
 * Axis:
 * 0 - touchpad x
 * 1 - touchpad y
 * Reference: https://github.com/immersive-web/webxr-input-profiles/blob/master/packages/registry/profiles/oculus/oculus-go.json
 */
var INPUT_MAPPING_WEBXR = {
  axes: {touchpad: [0, 1]},
  buttons: ['trigger', 'none', 'touchpad']
};

var INPUT_MAPPING = isWebXRAvailable ? INPUT_MAPPING_WEBXR : INPUT_MAPPING_WEBVR;

/**
 * Oculus Go controls.
 * Interface with Oculus Go controller and map Gamepad events to
 * controller buttons: trackpad, trigger
 * Load a controller model and highlight the pressed buttons.
 */
module.exports.Component = registerComponent('oculus-go-controls', {
  schema: {
    hand: {default: ''},  // This informs the degenerate arm model.
    buttonColor: {type: 'color', default: '#FFFFFF'},
    buttonTouchedColor: {type: 'color', default: '#BBBBBB'},
    buttonHighlightColor: {type: 'color', default: '#7A7A7A'},
    model: {default: true},
    orientationOffset: {type: 'vec3'},
    armModel: {default: true}
  },

  mapping: INPUT_MAPPING,

  bindMethods: function () {
    this.onModelLoaded = bind(this.onModelLoaded, this);
    this.onControllersUpdate = bind(this.onControllersUpdate, this);
    this.checkIfControllerPresent = bind(this.checkIfControllerPresent, this);
    this.removeControllersUpdateListener = bind(this.removeControllersUpdateListener, this);
    this.onAxisMoved = bind(this.onAxisMoved, this);
  },

  init: function () {
    var self = this;
    this.onButtonChanged = bind(this.onButtonChanged, this);
    this.onButtonDown = function (evt) { onButtonEvent(evt.detail.id, 'down', self); };
    this.onButtonUp = function (evt) { onButtonEvent(evt.detail.id, 'up', self); };
    this.onButtonTouchStart = function (evt) { onButtonEvent(evt.detail.id, 'touchstart', self); };
    this.onButtonTouchEnd = function (evt) { onButtonEvent(evt.detail.id, 'touchend', self); };
    this.controllerPresent = false;
    this.lastControllerCheck = 0;
    this.rendererSystem = this.el.sceneEl.systems.renderer;
    this.bindMethods();
  },

  addEventListeners: function () {
    var el = this.el;
    el.addEventListener('buttonchanged', this.onButtonChanged);
    el.addEventListener('buttondown', this.onButtonDown);
    el.addEventListener('buttonup', this.onButtonUp);
    el.addEventListener('touchstart', this.onButtonTouchStart);
    el.addEventListener('touchend', this.onButtonTouchEnd);
    el.addEventListener('model-loaded', this.onModelLoaded);
    el.addEventListener('axismove', this.onAxisMoved);
    this.controllerEventsActive = true;
  },

  removeEventListeners: function () {
    var el = this.el;
    el.removeEventListener('buttonchanged', this.onButtonChanged);
    el.removeEventListener('buttondown', this.onButtonDown);
    el.removeEventListener('buttonup', this.onButtonUp);
    el.removeEventListener('touchstart', this.onButtonTouchStart);
    el.removeEventListener('touchend', this.onButtonTouchEnd);
    el.removeEventListener('model-loaded', this.onModelLoaded);
    el.removeEventListener('axismove', this.onAxisMoved);
    this.controllerEventsActive = false;
  },

  checkIfControllerPresent: function () {
    checkControllerPresentAndSetup(this, GAMEPAD_ID_PREFIX,
                                        this.data.hand ? {hand: this.data.hand} : {});
  },

  play: function () {
    this.checkIfControllerPresent();
    this.addControllersUpdateListener();
  },

  pause: function () {
    this.removeEventListeners();
    this.removeControllersUpdateListener();
  },

  injectTrackedControls: function () {
    var el = this.el;
    var data = this.data;
    el.setAttribute('tracked-controls', {
      armModel: data.armModel,
      hand: data.hand,
      idPrefix: GAMEPAD_ID_PREFIX,
      orientationOffset: data.orientationOffset
    });
    if (!this.data.model) { return; }
    this.el.setAttribute('gltf-model', OCULUS_GO_CONTROLLER_MODEL_URL);
  },

  addControllersUpdateListener: function () {
    this.el.sceneEl.addEventListener('controllersupdated', this.onControllersUpdate, false);
  },

  removeControllersUpdateListener: function () {
    this.el.sceneEl.removeEventListener('controllersupdated', this.onControllersUpdate, false);
  },

  onControllersUpdate: function () {
    this.checkIfControllerPresent();
  },

  // No need for onButtonChanged, since Oculus Go controller has no analog buttons.

  onModelLoaded: function (evt) {
    var controllerObject3D = evt.detail.model;
    var buttonMeshes;

    if (!this.data.model) { return; }
    buttonMeshes = this.buttonMeshes = {};
    buttonMeshes.trigger = controllerObject3D.getObjectByName('oculus_go_button_trigger');
    buttonMeshes.trackpad = controllerObject3D.getObjectByName('oculus_go_touchpad');
    buttonMeshes.touchpad = controllerObject3D.getObjectByName('oculus_go_touchpad');
  },

  onButtonChanged: function (evt) {
    var button = this.mapping.buttons[evt.detail.id];
    if (!button) return;
    // Pass along changed event with button state, using button mapping for convenience.
    this.el.emit(button + 'changed', evt.detail.state);
  },

  onAxisMoved: function (evt) {
    emitIfAxesChanged(this, this.mapping.axes, evt);
  },

  updateModel: function (buttonName, evtName) {
    if (!this.data.model) { return; }
    this.updateButtonModel(buttonName, evtName);
  },

  updateButtonModel: function (buttonName, state) {
    var buttonMeshes = this.buttonMeshes;
    if (!buttonMeshes || !buttonMeshes[buttonName]) { return; }
    var color;
    var button;
    switch (state) {
      case 'down':
        color = this.data.buttonHighlightColor;
        break;
      case 'touchstart':
        color = this.data.buttonTouchedColor;
        break;
      default:
        color = this.data.buttonColor;
    }
    button = buttonMeshes[buttonName];
    button.material.color.set(color);
    this.rendererSystem.applyColorCorrection(button.material.color);
  }
});

},{"../core/component":113,"../utils/":187,"../utils/bind":181,"../utils/tracked-controls":196}],77:[function(_dereq_,module,exports){
var bind = _dereq_('../utils/bind');
var registerComponent = _dereq_('../core/component').registerComponent;
var THREE = _dereq_('../lib/three');

var trackedControlsUtils = _dereq_('../utils/tracked-controls');
var checkControllerPresentAndSetup = trackedControlsUtils.checkControllerPresentAndSetup;
var emitIfAxesChanged = trackedControlsUtils.emitIfAxesChanged;
var onButtonEvent = trackedControlsUtils.onButtonEvent;

var isWebXRAvailable = _dereq_('../utils/').device.isWebXRAvailable;

var GAMEPAD_ID_WEBXR = 'oculus-touch';
var GAMEPAD_ID_WEBVR = 'Oculus Touch';

// Prefix for Gen1 and Gen2 Oculus Touch Controllers.
var GAMEPAD_ID_PREFIX = isWebXRAvailable ? GAMEPAD_ID_WEBXR : GAMEPAD_ID_WEBVR;

// First generation model URL.
var TOUCH_CONTROLLER_MODEL_BASE_URL = 'https://cdn.aframe.io/controllers/oculus/oculus-touch-controller-';

var OCULUS_TOUCH_WEBVR = {
  left: {
    modelUrl: TOUCH_CONTROLLER_MODEL_BASE_URL + 'left.gltf',
    rayOrigin: {origin: {x: 0.008, y: -0.01, z: 0}, direction: {x: 0, y: -0.8, z: -1}},
    modelPivotOffset: new THREE.Vector3(-0.005, 0.003, -0.055),
    modelPivotRotation: new THREE.Euler(0, 0, 0)
  },
  right: {
    modelUrl: TOUCH_CONTROLLER_MODEL_BASE_URL + 'right.gltf',
    rayOrigin: {origin: {x: -0.008, y: -0.01, z: 0}, direction: {x: 0, y: -0.8, z: -1}},
    modelPivotOffset: new THREE.Vector3(0.005, 0.003, -0.055),
    modelPivotRotation: new THREE.Euler(0, 0, 0)
  }
};

var OCULUS_TOUCH_WEBXR = {
  left: {
    modelUrl: TOUCH_CONTROLLER_MODEL_BASE_URL + 'left.gltf',
    rayOrigin: {origin: {x: 0.002, y: -0.005, z: -0.03}, direction: {x: 0, y: -0.8, z: -1}},
    modelPivotOffset: new THREE.Vector3(-0.005, 0.036, -0.037),
    modelPivotRotation: new THREE.Euler(Math.PI / 4.5, 0, 0)
  },
  right: {
    modelUrl: TOUCH_CONTROLLER_MODEL_BASE_URL + 'right.gltf',
    rayOrigin: {origin: {x: -0.002, y: -0.005, z: -0.03}, direction: {x: 0, y: -0.8, z: -1}},
    modelPivotOffset: new THREE.Vector3(0.005, 0.036, -0.037),
    modelPivotRotation: new THREE.Euler(Math.PI / 4.5, 0, 0)
  }
};

var OCULUS_TOUCH_CONFIG = isWebXRAvailable ? OCULUS_TOUCH_WEBXR : OCULUS_TOUCH_WEBVR;

var CONTROLLER_DEFAULT = 'oculus-touch';
var CONTROLLER_PROPERTIES = {
  'oculus-touch': OCULUS_TOUCH_CONFIG,
  'oculus-touch-v2': {
    left: {
      modelUrl: TOUCH_CONTROLLER_MODEL_BASE_URL + 'gen2-left.gltf',
      rayOrigin: {origin: {x: -0.01, y: 0, z: -0.02}, direction: {x: 0, y: -0.5, z: -1}},
      modelPivotOffset: new THREE.Vector3(0, 0, 0),
      modelPivotRotation: new THREE.Euler(0, 0, 0)
    },
    right: {
      modelUrl: TOUCH_CONTROLLER_MODEL_BASE_URL + 'gen2-right.gltf',
      rayOrigin: {origin: {x: 0.01, y: 0, z: -0.02}, direction: {x: 0, y: -0.5, z: -1}},
      modelPivotOffset: new THREE.Vector3(0, 0, 0),
      modelPivotRotation: new THREE.Euler(0, 0, 0)
    }
  },
  'oculus-touch-v3': {
    left: {
      modelUrl: TOUCH_CONTROLLER_MODEL_BASE_URL + 'v3-left.glb',
      rayOrigin: {origin: {x: 0.015, y: 0.005, z: 0}, direction: {x: 0, y: 0, z: -1}},
      modelPivotOffset: new THREE.Vector3(0.01, -0.01, 0.05),
      modelPivotRotation: new THREE.Euler(Math.PI / 4, 0, 0)
    },
    right: {
      modelUrl: TOUCH_CONTROLLER_MODEL_BASE_URL + 'v3-right.glb',
      rayOrigin: {origin: {x: -0.015, y: 0.005, z: 0}, direction: {x: 0, y: 0, z: -1}},
      modelPivotOffset: new THREE.Vector3(-0.01, -0.01, 0.05),
      modelPivotRotation: new THREE.Euler(Math.PI / 4, 0, 0)
    }
  }
};

/**
 * Button indices:
 * 0 - thumbstick (which has separate axismove / thumbstickmoved events)
 * 1 - trigger (with analog value, which goes up to 1)
 * 2 - grip (with analog value, which goes up to 1)
 * 3 - X (left) or A (right)
 * 4 - Y (left) or B (right)
 * 5 - surface (touch only)
 */
var INPUT_MAPPING_WEBVR = {
  left: {
    axes: {thumbstick: [0, 1]},
    buttons: ['thumbstick', 'trigger', 'grip', 'xbutton', 'ybutton', 'surface']
  },
  right: {
    axes: {thumbstick: [0, 1]},
    buttons: ['thumbstick', 'trigger', 'grip', 'abutton', 'bbutton', 'surface']
  }
};

/**
 * Button indices:
 * 0 - trigger
 * 1 - grip
 * 2 - none
 * 3 - thumbstick
 * 4 - X or A button
 * 5 - Y or B button
 * 6 - surface
 *
 * Axis:
 * 0 - none
 * 1 - none
 * 2 - thumbstick
 * 3 - thumbstick
 * Reference: https://github.com/immersive-web/webxr-input-profiles/blob/master/packages/registry/profiles/oculus/oculus-touch.json
 */
var INPUT_MAPPING_WEBXR = {
  left: {
    axes: {thumbstick: [2, 3]},
    buttons: ['trigger', 'grip', 'none', 'thumbstick', 'xbutton', 'ybutton', 'surface']
  },
  right: {
    axes: {thumbstick: [2, 3]},
    buttons: ['trigger', 'grip', 'none', 'thumbstick', 'abutton', 'bbutton', 'surface']
  }
};

var INPUT_MAPPING = isWebX